CN105734316B - A kind of method that shaping titanium matrix composite is directly prepared using titanium hydride powders - Google Patents

Abstract

The invention discloses a method for directly preparing a titanium-based composite material by using titanium hydride powder, comprising the following steps: making a billet: mixing the titanium hydride powder and additives and molding it into a powder compact; dehydrogenation: making the powder The compact is heated, and the heating rate is maintained at 50-200°C/min until the temperature of the powder compact rises to 900-1500°C, and is kept at the selected temperature for 5 to 30 minutes; forming: the heated powder is pressed The billet is moved into the extrusion device, and is extruded under a certain pressure and extrusion ratio so that the powder compact passes through the extrusion die and is formed and consolidated into a titanium-based composite material; cooling: after the extrusion is completed, the titanium-based composite material is Cool to room temperature at a rate of 10-100°C/min, then remove. The invention reduces the cost of raw materials, shortens the technological process and reduces the introduction of impurities in the subsequent processing. The invention has the characteristics of fast dehydrogenation speed, high product density and good mechanical properties.

Description

A method for directly preparing a titanium-based composite material using titanium hydride powder

technical field

The invention relates to a method for preparing composite materials, in particular to a method for directly preparing and forming titanium-based composite materials by using titanium hydride powder for rapid dehydrogenation and thermal consolidation, and belongs to the technical field of nonferrous metal processing.

Background technique

Titanium is an important non-ferrous metal material, because of its low density, high specific strength, corrosion resistance, high temperature mechanical properties, fatigue resistance and creep performance, etc., in recent years, it has been widely used in military products such as aerospace vehicles, ships and weapons. Manufacturing applications are increasingly widespread. In addition, titanium also has great application potential in industries such as automobile, medical treatment, chemical industry, energy and daily consumption. Therefore, titanium is also called "the rising third metal" and "the metal of the 21st century".

However, due to the low mechanical strength of pure titanium, its strength is mainly provided by interstitial elements (N, O, H, etc.) dissolved in titanium. The higher the content of interstitial elements, the higher the strength of titanium. However, because these interstitial elements have high solid solubility and strong affinity in titanium, they are also difficult to be removed during subsequent processing, such as when titanium and its alloys are processed in an environment containing oxygen and nitrogen. When heated, not only does a solid hardened layer form on the surface, but oxygen and nitrogen also diffuse into the material, distorting the material's crystal lattice and reducing its shape. Therefore, in order to meet the increasing demand for high-performance materials in the development of science and technology, people always hope to obtain high-purity titanium materials and continuously increase the mechanical properties of materials through various technological means to meet the needs of different fields.

An effective method to enhance the mechanical properties of titanium is to add fibers or particles of the second phase to the titanium matrix to prepare titanium matrix composites (Titanium Matrix Composites, TMCs) with higher strength. Titanium matrix composites can effectively combine the advantages of high ductility and low density of metal titanium with the characteristics of high strength and high modulus of the reinforcing phase, and the prepared titanium matrix composites have higher Specific strength and high temperature resistance, better fatigue resistance and shear resistance.

The reinforcing phase in titanium matrix composites is the main reason for improving the mechanical properties of materials. According to the shape, volume fraction and content of the reinforcing phase, the role of the reinforcing phase in the composite material is mainly to hinder the movement of dislocations and the growth of grains, and at the same time play the role of bearing stress and transmitting stress, so that the material can be improved. Intrinsic strength, high temperature performance and creep resistance. Generally, the selection of the reinforcing phase should meet the following conditions: it has high mechanical properties such as strength, stiffness and hardness. Usually the reinforcement phase occupies a certain volume fraction in the matrix and needs to bear part of the load from the outside. When the reinforcement phase is small enough and reaches a certain amount, the dispersion strengthening that hinders the movement of dislocations becomes very important; it has a high thermodynamic Stability, due to the high melting point of titanium, the reinforcement has good thermodynamic stability during thermal processing and should not react with the matrix material or dissolve in the matrix; there should be a good relationship between the reinforcement phase and the matrix Wetting and chemical compatibility, and no serious interfacial chemical reaction; in addition, the thermal expansion coefficient of the reinforcing phase should be similar to that of the matrix material, so as to reduce the apparent thermal expansion caused by thermal expansion coefficient mismatch during thermal processing and subsequent use. microcracks. At present, it is considered that the ideal reinforcing phases of titanium matrix composites mainly include TiB, TiC, SiC, B ₄ C and ZrB ₂ .

The preparation methods of titanium matrix composites can be divided into two types: external method and in-situ generation method (in-situ) according to the way of adding or generating reinforcements. The external addition method is to directly add the final reinforcement phase to the metal matrix to synthesize the composite material, while the in situ generation method means that the reinforcement phase in the composite material is formed through the chemical reaction of the external elements and the matrix in the subsequent preparation process. . Elements that can react with titanium to form a stable reinforcing phase mainly include B, C, TiB ₂ , B ₄ C, Cr ₃ C ₂ and Si ₃ N ₄ .

In recent years, the research on the preparation of titanium and titanium alloy products using titanium hydride as raw material has been increasing. Using titanium hydride to directly prepare titanium products can reduce the cost of raw materials, reduce the process flow, and increase the sintering density. However, at present, most people still use pure titanium or titanium alloy as the matrix material for the preparation of titanium-based composite materials, and the research on the preparation of titanium-based composite materials by using titanium hydride powder is still in its infancy. N.Peillon et al. mixed titanium hydride powder with 10vol% and 20vol% TiC particles, and then prepared TiC-reinforced titanium-based composites by cold pressing and free sintering at 800-1375°C in a vacuum environment. Material. Compared with the composite materials prepared by using atomized titanium powder and hydrogenated dehydrogenated titanium powder as raw materials in the same process, the use of titanium hydride as raw material can reduce the sintering temperature and increase the density of the final material. Woong Lee et al. mixed titanium hydride powder with 0-60vol% TiC particles, and then heated it to 1000-1150°C under a pressure of 60MPa by hot pressing to prepare TiC-reinforced titanium-based composite materials and Microstructural transformations were studied. In the existing research reports, the dehydrogenation of titanium hydride takes a long time, and there will still be some residual holes in the final material, which requires further post-treatment process to improve the density of the material.

There are following deficiencies in the prior art:

1. The traditional casting process prepares titanium-based composite materials, and the preparation temperature is above the melting point of the matrix titanium. Since the melting point of pure titanium is as high as 1660°C, a large amount of energy is required. In addition, since composition segregation may occur during the cooling process, multiple castings are required to achieve uniform composition.

2. Titanium-based composite materials prepared by powder metallurgy mostly use titanium powder as the matrix raw material, but due to the high chemical activity of titanium, it is easy to react with impurity elements such as H, O, C, and N in the environment at high temperatures, so In the production process of titanium powder, the requirements on the surrounding environment are strict, and the production cost of high-purity titanium powder is very high.

3. At present, titanium hydride powder is used as raw material to prepare titanium-based composite materials, and most of them adopt pressureless sintering or sintering with low pressure. Since the release of hydrogen gas during the dehydrogenation process of titanium hydride will cause certain voids inside the material, it is therefore used The density of the product directly prepared by titanium hydride is difficult to meet the requirements of use, and further processing (such as forging, rolling, extrusion, etc.) is required to improve the density of the material and increase the process steps.

Contents of the invention

The technical problem to be solved by this invention is:

1. How to simplify the process, reduce production costs, prepare a titanium-based composite material in which the reinforcing phase is uniformly distributed in the matrix, and at the same time reduce the impact of the introduction of impurity elements during processing on the performance of the final product.

2. How to quickly remove the hydrogen in titanium hydride to reduce the hydrogen in the product to an acceptable range.

3. How to use titanium hydride as a raw material to directly prepare high-density titanium-based composite profiles.

In order to achieve the above object, the present invention mixes titanium hydride powder and reinforcing phase and cold-presses it into a billet. In the self-modified multifunctional powder consolidation system, the mixture powder compact is heated to a certain temperature by induction heating and subjected to short-term Immediately after heat preservation, the extrusion profile of titanium-based composite material with higher density and required cross-sectional shape can be directly prepared. The invention reduces the cost of raw materials, shortens the process flow, and reduces the subsequent processing process. The introduction of impurities. In addition, the invention can realize the preparation of titanium-based composite materials by external method or in-situ generation method by changing the type of reinforcing phase added, and the invention has the characteristics of fast dehydrogenation speed, high product density and good mechanical properties. The technical solution is as follows:

A method for directly preparing a titanium-based composite material by using titanium hydride powder, comprising the steps of:

Step 1. Blank making: mixing titanium hydride powder and additives and molding them into powder compacts; the additives are direct reinforcement phases or additive phases that can react with titanium or titanium hydride to generate reinforcement phases in situ;

Step 2, dehydrogenation: heat the powder compact, maintain the heating rate at 50-200°C/min, until the temperature of the powder compact rises to 900-1500°C, and keep warm at the selected temperature for 5 minutes to 30 minutes;

Step 3. Forming: move the heated powder compact into an extrusion device, and perform extrusion under a certain pressure and extrusion ratio so that the powder compact passes through the extrusion die, and is formed and consolidated into a titanium-based composite material;

Step 4. Cooling: After extrusion, the titanium-based composite material is cooled to room temperature at a speed of 10-100° C./min, and then taken out.

Preferably, in step 1, the direct reinforcing phase is selected from one of TiC, TiB ₂ or graphene, and the added phase is selected from one of graphite, carbon nanotubes, graphene or boron.

Preferably, in step 2, an induction heating coil is used to heat the powder compact.

Preferably, in step 3, the temperature of the extrusion device and the extrusion die is kept between 450-550°C.

Preferably, the pressure in step 3 is between 50-300MPa.

Preferably, the extrusion ratio in step 3 is between 5:1-100:1.

Preferably, the extrusion rate in step 3 is 15-100 mm/s.

Preferably, the shape of the extrusion die in step 3 is determined according to the requirements of titanium products.

Preferably, the heating in step 2 and the extrusion process in step 3 are carried out in a sealed environment, and argon gas is continuously introduced into the sealed environment to ensure that the oxygen content in the sealed environment is not higher than 200ppm.

Preferably, the entire process of preparing the titanium-based composite material does not exceed 30 minutes.

Compared with the prior art, the present invention has the following beneficial effects:

1. The cost of raw materials is low. The intermediate product of hydrogenation dehydrogenation, titanium hydride powder, is used as the raw material, and its cost is greatly reduced compared with pure titanium powder.

2. The reaction speed is fast. The powder compact is rapidly heated to a higher temperature in an open environment, so that the hydrogen in the titanium hydride can be basically removed within 30 minutes. In addition, in the in-situ self-generated reinforcement phase system, the reinforcement phase can be rapidly generated during the process of heating and heat preservation.

Fig. 2 is titanium hydride powder and 1vol.% carbon nanotubes (CNTs) mixed powder compact (denoted as TiH2-1CNTs) and the titanium-based composite material (denoted as TiH2-1CNTs) obtained by extruding the compact at 1200 ℃ for 5 minutes Comparison of XRD pattern of TiH2-1CNTs-1200-5min). It can be seen that the titanium hydride is completely transformed into pure titanium after extrusion, and an in-situ reinforcement phase is generated at the same time.

3. Simplify the process and improve efficiency. In the present invention, titanium hydride powder is used to replace traditional titanium powder, and the dehydrogenation of titanium hydride, the in-situ self-generation of the reinforcement phase (or the addition of reinforcement phase) and the consolidation of the material are combined without dehydrogenation by titanium hydride powder alone. Hydrogen pulverization greatly shortens and simplifies the process of first pulverization and then consolidation and finally remolding in the traditional preparation process, which improves the production efficiency and reduces the possibility of materials being polluted by the ambient atmosphere. It can be prepared within 30 minutes. Titanium-based composite products with high density and high mechanical properties.

4. Generate new material microstructure. Due to the use of titanium hydride powder as a raw material, a certain amount of hydrogen will participate in the phase transformation during the preparation and molding process, resulting in the formation of a new microstructure of the titanium matrix, such as a coarse-grained and ultra-fine-grained double structure. These new microstructures will contribute to the high mechanical strength and plasticity of titanium matrix composites.

Description of drawings

Fig. 1 is a schematic diagram of the multifunctional powder consolidation system used in the present invention;

Fig. 2 is the XRD spectrum of the titanium-based composite material that a preferred embodiment of the present invention makes;

Fig. 3 is the dehydrogenation of a preferred embodiment of the present invention and in situ autogenous reaction flow chart;

Fig. 4 is a tensile performance curve of a titanium-based composite material prepared in a preferred embodiment of the present invention.

Detailed ways

The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the scope of protection of the present invention is not limited to the following the described embodiment. The core of the present invention is to use titanium hydride as a raw material to integrate the dehydrogenation of titanium hydride, the in-situ self-generation of the reinforcement phase (or the reinforcement phase) and the consolidation of the material in the same system. Any similar thermal consolidation process belongs to this invention. protection scope of the invention.

Selection of raw materials:

The present invention adopts hydrogenated titanium powder, an intermediate product in the process of preparing titanium powder by hydrogenation dehydrogenation, as a matrix raw material, and its cost is greatly reduced compared with pure titanium powder, saving raw material cost. In addition, since the hydrogen gas released by titanium hydride during the dehydrogenation process will undergo a reduction reaction with the oxides existing on the surface of the material, the oxygen content in the final product can be reduced, and it has the effect of cleaning the surface.

In the present invention, the reinforcement phase can be selected from a material that has good compatibility with the matrix titanium and exists stably as an additional phase, including but not limited to TiB, TiC, SiC, _ZrB2 , etc.; Materials that react with titanium to form a reinforcing phase in situ, including but not limited to B, C, TiB ₂ , B ₄ C, etc.

Core equipment:

The core equipment used in the present invention is a self-modified multifunctional powder consolidation system, the schematic diagram of which is shown in Figure 1. The equipment integrates the hydraulic press and the induction heating coil in an atmosphere-protected glove box. The argon gas is continuously fed into the glove box and the oxygen content in it is monitored in real time by an oxygen content detector to ensure that the oxygen content in the glove box is within The process of preparation is always below 200ppm. The powder compact after induction heating and heat preservation for a period of time is quickly moved to an extrusion die heated to a certain temperature in advance and extruded by a hydraulic press. The equipment combines the dehydrogenation of titanium hydride, the in-situ self-generation of the reinforced phase and the consolidation process of the material, which simplifies the processing technology, reduces the contact between the material and the impurity elements in the environment, and can directly prepare a material with a higher density. Titanium matrix composite profiles.

The technical means and characteristics of the present invention are as follows:

A. Titanium hydride powder is mixed with a certain amount of reinforcing phase powder and pressed into a powder compact by molding.

1. Mix titanium hydride powder and 0-50vol% reinforcing phase powder by mechanical powder mixing method, and the mixing time is controlled within 0-100 hours according to the content of the reinforcing phase, so that the final reinforcing phase can be in the titanium hydride powder Uniform distribution shall prevail.

2. In the range of room temperature to 300°C, the mixed powder is pressed into a compact by molding, and the density of the compact prepared by this step should be between 75% and 95%.

3. Due to the increase in the content of the reinforcing phase, the formability of the mixture powder will become worse. When mixing the powder, a certain amount of forming agent can be added to the powder to help the powder form.

B. Use the induction heating coil to heat the mixed powder compact of titanium hydride/reinforcing phase, and the heating rate is maintained at 50-200°C/min until the temperature of the mixed powder compact rises to 900°C-1500°C, and at the selected temperature Keep warm for 5 minutes to 30 minutes.

This step is one of the core steps of the present invention, and its main features and effects are as follows:

1. The induction heating coil is used to heat the titanium hydride/reinforced phase mixed powder compact, which is characterized by fast heating speed, which can quickly heat the mixed powder compact to the extrusion temperature, because the dehydrogenation effect of titanium hydride is better at high temperature Well, thereby accelerating the dehydrogenation rate (ie fast dehydrogenation in the present invention), while the reduction of dehydrogenation time also reduces the reaction time between titanium and impurity elements in the environment after dehydrogenation. The main feature of this step is rapid heating. According to the size of the sample, low-frequency, medium-frequency or high-frequency induction heating can be adopted, as long as the heating rate meets the requirements. At the same time, microwave heating and other heating methods that can quickly heat up can also be used as alternative heating solutions.

2. The selection of heating temperature and holding time can be adjusted according to different titanium hydride/enhanced phase systems. For the external reinforcement phase system, only the dehydrogenation status of titanium hydride needs to be considered. At lower temperatures, the dehydrogenation of titanium hydride takes a long time, and the selection of heating temperature and holding time should be based on ensuring that hydrogen can be completely removed; The heating and holding process of the blank is also a process in which the initial raw material and the dehydrogenated titanium react with each other to form an in-situ reinforced phase. Therefore, in addition to considering the dehydrogenation status of titanium hydride, the heating temperature and holding time should also be based on different in-situ autogenous reactions. Make appropriate adjustments to the size of the system and the desired reinforcement phase.

3. Combining the dehydrogenation of titanium hydride and the in-situ self-generation process of the reinforcing phase with the heating process of the compact before extrusion simplifies the process flow, reduces the contact time between titanium and impurity elements in the environment, and is beneficial to reduce the final product impurity content in.

C. Quickly move the mixed powder compact after induction heating into the extrusion cylinder, and extrude it under a certain pressure and extrusion ratio so that the material passes through an extrusion die with a certain inner cavity shape, and is formed and consolidated into a titanium-based composite Products of material. The temperature of extrusion cylinder and die is kept between 450-550°C. The extrusion pressure is between 50-300MPa, and the extrusion ratio is between 5:1-100:1. The shape of the extrusion die is determined according to the requirements of the product, and it can be rod-shaped, tubular or other shapes required by customers.

This step is another core step of the present invention, and its main features and effects are as follows:

1. The extrusion device is installed in the same sealed glove box as the induction heating device in step B, so that the induction heated sample can be quickly moved into the extrusion die to reduce heat loss.

2. Consolidation of materials by hot extrusion is the key to the preparation of titanium products with high density. During the dehydrogenation of titanium hydride, due to the precipitation of hydrogen, holes may be formed inside the material to reduce the density of the material. Extrusion can produce large plastic deformation, which makes the pores formed inside the material close and disappear, thereby increasing the density of the material. In addition, the extrusion deformation can also make the interface between the matrix material and the reinforcement phase more firm and improve the degree of consolidation of the composite material. After testing, the density of the titanium-based composite material after extrusion is greater than 99.5%. Straight barrel extrusion is adopted in the present invention, and Equal Channel Angular Pressing (ECAP), which has a similar effect, can be used as an alternative.

3. Extrusion dies can be customized according to requirements, so as to directly prepare profiles with certain shapes, including but not limited to rods, tubes and other shapes. The sample after extrusion is close to the shape of the final product, which reduces the subsequent machining process and can further reduce the cost.

D. After the extrusion is completed, the extruded titanium-based composite material is cooled to room temperature at a speed of 10-100°C/min, and then taken out.

The properties of the final product can be improved by controlling the cooling rate to change the microstructure of the final material. The cooling rate of air cooling is fast, the grain size of the material is relatively small, and it has high mechanical strength. By controlling the cooling rate and cooling the material slowly, a sample with an equiaxed structure can be obtained, and the shape of the material can be improved under the premise of sacrificing a certain strength.

E. During the heating and extrusion process, continuously feed argon into the glove box to ensure that the oxygen content in the environment is not higher than 200ppm. The dehydrogenation of titanium hydride, the in-situ self-generation of the reinforcement phase and the consolidation molding process of the titanium-based composite material are completed in a relatively short period of time, and the entire process does not exceed 30 minutes.

1. Titanium is easy to react with H, O, C, N and other elements at high temperature. Therefore, it is necessary to control the content of impurity elements in the environment during the whole heating and extrusion process. The inert element argon (Ar) does not react with titanium. Ideal for a protective atmosphere.

2. The entire process of dehydrogenation, in-situ self-generation and consolidation of the reinforcement phase is controlled within 30 minutes, in order to reduce the contact time between the titanium-based composite material formed after dehydrogenation and the impurity elements in the environment. Because although the argon gas was continuously filled into the glove box for protection during the preparation process, the presence of impurity elements cannot be completely ruled out.

In addition to the above specific embodiments, the present invention can also have the following alternatives:

1. For the mixing of titanium hydride powder and reinforcing phase powder, in addition to the method of mechanical powder mixing, wet mixing, high-energy ball milling and other processes that can make the reinforcing phase evenly distributed in titanium hydride can be used as alternatives.

2. The heating method can adopt low, medium and high frequency induction heating according to the size of the mixed powder compact, and can also adopt microwave heating or other heating methods with rapid heating capability.

3. The extrusion method can be straight cylinder extrusion, or equiangular extrusion (ECAP) with similar effects, horizontal extrusion, hot pressing and other densification methods.

4. In addition to extrusion, the material consolidation method can also be replaced by forging, rolling, etc.

5. In addition to argon, other inert gases that do not react with titanium can also be used for protection, or under vacuum conditions.

6. In addition to the cooling methods described in the above specific embodiments, water quenching or oil quenching can also be substituted.

A more specific example is as follows:

In this example, titanium hydride powder was used as the matrix raw material, and carbon nanotubes (CNTs) were used as the carbon source for the in-situ authigenic reaction. The in-situ The specific process and steps of self-generated TiC reinforced titanium-based composite materials are as follows:

1. Add 1vol% of CNTs (0.56g) to 100g of titanium hydride powder (-200 mesh), add 200g of stainless steel balls with a diameter of 10mm, and use a planetary ball mill to mix the powder at a speed of 200 rpm at room temperature 4 Hours, using a scanning electron microscope, it was found that the CNTs were evenly mixed in the titanium hydride powder at this time.

2. Take 50g of mixed powder of titanium hydride powder and CNTs, and press it into a mixed powder compact with a diameter of 28mm and a height of 25mm by unidirectional molding under a pressure of 500MPa at room temperature.

3. In the self-modified multifunctional powder consolidation system, the mixed powder compact is placed in the induction coil. Pass argon gas with a purity of 99.99% into the closed glove box, and use an oxygen analyzer to measure the oxygen content in the glove box until the oxygen content in the glove box is lower than 200ppm. The extrusion barrel is heated by an electric heating coil, so that the temperature of the extrusion die and the extrusion rod rises to 500°C.

4. Adjust the power of the intermediate frequency induction heating power supply to heat the mixed powder compact, so that the heating rate is maintained at 100°C/min until the temperature of the compact rises to 1200°C, and then kept at this temperature for 5 minutes. After the heat preservation is over, use the high-temperature pliers to quickly move the compact into the extrusion cylinder, then put the extrusion rod into the extrusion die, and extrude at a pressure of 500 MPa at a speed of 12 mm/s. During the process of heating and extruding the compact, the glove box needs to be continuously filled with argon to ensure that the oxygen content in the environment is not higher than 100ppm. The inner diameter of the extrusion cylinder used in this embodiment is 30 mm, the inner diameter of the extrusion nozzle is 10 mm, and the extrusion ratio is 9:1.

5. In the process of induction heating, the dehydrogenation of titanium hydride and the in-situ self-generated reaction of the reinforcing phase proceed simultaneously, and the reaction process is shown in Figure 3.

6. After the extrusion is completed, the heating coil of the mold is turned off, and the extruded bar is air-cooled to room temperature, and then taken out. The tensile performance curve of the titanium-based composite material in this embodiment is shown in Figure 4.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (8)

1. A kind of 1. method that shaping titanium matrix composite is directly prepared using titanium hydride powders, it is characterised in that including following step Suddenly：

   Step 1, base：Titanium hydride powders and 1vol% CNTs are subjected to mixed merga pass molding powder compact is made；

   Step 2, dehydrogenation：The powder compact is heated under protective atmosphere using load coil, heating rate dimension Hold at 50-200 DEG C/min, until the powder compact temperature rises to 1200 DEG C, and 5 minutes are incubated at selected temperature；

   Step 3, shaping：The powder compact after heating is moved into pressurizing unit, the pressurizing unit adds with the sensing Heat coil collection is mounted in the glove box with atmosphere protection, and extruding is carried out under certain pressure and extrusion ratio makes the powder pressure Base is consolidated into titanium matrix composite by extrusion die, shaping；

   Step 4, cooling：After the completion of extruding, the titanium matrix composite is cooled to room under 10-100 DEG C/min of speed Temperature, then take out.
2. 2. a kind of method that shaping titanium matrix composite is directly prepared using titanium hydride powders according to claim 1, its It is characterised by, pressurizing unit described in step 3 and the extrusion die temperature are maintained between 450-550 DEG C.
3. 3. a kind of method that shaping titanium matrix composite is directly prepared using titanium hydride powders according to claim 1, its It is characterised by, pressure is between 50-300MPa described in step 3.
4. 4. a kind of method that shaping titanium matrix composite is directly prepared using titanium hydride powders according to claim 1, its It is characterised by, extrusion ratio is 5 described in step 3:1-100:Between 1.
5. 5. a kind of method that shaping titanium matrix composite is directly prepared using titanium hydride powders according to claim 1, its It is characterised by, extruding rate is 15mm/s-100mm/s in step 3.
6. 6. a kind of method that shaping titanium matrix composite is directly prepared using titanium hydride powders according to claim 1, its It is characterised by, the shape of extrusion die described in step 3 determines according to the requirement of the titanium matrix composite.
7. 7. a kind of method that shaping titanium matrix composite is directly prepared using titanium hydride powders according to claim 1, its It is characterised by, step 2 is heated and step 3 extrusion process is carried out in sealed environment, and argon is continually fed into the sealed environment Gas, it is ensured that oxygen content is not higher than 200ppm in the sealed environment.
8. 8. a kind of method that shaping titanium matrix composite is directly prepared using titanium hydride powders according to claim 1, its It is characterised by, the whole technical process for preparing the titanium matrix composite is no more than 30 minutes.