CN104439069A - Method for roasting mold shell of investment pattern precision casting axle housing - Google Patents
Method for roasting mold shell of investment pattern precision casting axle housing Download PDFInfo
- Publication number
- CN104439069A CN104439069A CN201410640059.7A CN201410640059A CN104439069A CN 104439069 A CN104439069 A CN 104439069A CN 201410640059 A CN201410640059 A CN 201410640059A CN 104439069 A CN104439069 A CN 104439069A
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- China
- Prior art keywords
- shell
- roasting
- axle housing
- precision casting
- pattern precision
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005495 investment casting Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- 239000002893 slag Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 18
- 239000000047 product Substances 0.000 claims description 9
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 8
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 claims description 8
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical group [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 4
- 239000010436 fluorite Substances 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 239000004115 Sodium Silicate Substances 0.000 abstract description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052911 sodium silicate Inorganic materials 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 3
- 241001062472 Stokellia anisodon Species 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 244000035744 Hura crepitans Species 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for roasting a mold shell of an investment pattern precision casting axle housing. The method comprises the following process steps: (1) compounding; (2) charging; (3) switching on the power supply of an electric melting furnace and starting to smelt; (4) deoxidizing; (5) discharging when the temperature of molten steel is 1600-1615 DEG C, and stopping roasting; and (6) placing a shell mold roasted in the step (5) at a pouring position, covering a pouring cup with an iron cover board, filling sands into a gap of the shell mold and thus completing all the procedures. According to the method, the sodium silicate mold shell has low gas generation amount and good air permeability, the temperature difference of molten alloy and the mold shell can be reduced, the mold-filling capacity is improved, the product quality of the precision castings is improved, the production efficiency is improved and the production cost is reduced.
Description
Technical field
The shell roasting method of investment pattern precision casting axle housing body of the present invention, belongs to hot investment casting field.
Background technology
Axle housing body, be the basic part installing main reducing gear, differential mechanism, semiaxis, wheel hub and suspension, Main Function supports and protects main reducing gear, differential mechanism and semiaxis etc.Meanwhile, axle housing body is again one of main component parts of running gear, and axle housing body should have enough strength and stiffness.
Precision-investment casting refers to makes meltability model (be called for short fusible pattern or model) with fusible material (such as wax material or plastics); apply the fireproof coating that some layers are special thereon; after super-dry and sclerosis formation overall shell; from shell, melt fusible pattern with steam or hot water again; then shell is placed in sandbox; dry moulding is filled in its surrounding; finally casting mold is put into roaster through high-temperature roasting; casting mold or shell, after roasting, obtain foundry goods in wherein casting molten metal.
Baking is one of key link of precision-investment casting.The quality of Baking quality directly has influence on the quality of foundry goods, if shell is not grilled thoroughly and sintered, can cause that the elevated temperature strength of shell is deteriorated, Shell cracking, causes foundry goods misrun, foundry goods to produce the defect such as pore, cast(ing) surface be full of cracks.And, sodium silicate shell take off cured after, the organic matter etc. in shell in the wax material of inevitable remaining some, salt, saponified, moisture and refractory material, the existence of these residues, directly affect casting quality, must be got rid of by high-temperature roasting.
Summary of the invention
The present invention seeks to the defect in order to make up prior art, a kind of shell roasting method of investment pattern precision casting axle housing body is provided, this method can make sodium silicate shell have low gas forming amount and good gas permeability, can also reduce the temperature difference of liquid alloy and shell, improves mold-filling capacity.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: the shell roasting method of investment pattern precision casting axle housing body, comprises following processing step:
(1) prepare burden: by the composition proportion requirement of cast product, weigh various shove charge furnace charge;
(2) feed: furnace charge is delivered to electric smelter, fusing point is high, be difficult to melt, not oxidizable batching is placed in bottom electric smelter;
(3) connect electric smelter power supply, start melting; When there is molten steel, adding slag former, covering liquid steel level; When furnace charge amount >=80% of fusing, remove old slag, and keep liquid steel level to be coated with slag former;
(4) deoxidation: when liquid steel temperature >=1500 DEG C, adds deoxidier and carries out deoxidation, and supplements deoxidier in time; Leave standstill 2 ~ 3 minutes after deoxidation, deoxidation products is floated, and before coming out of the stove, slag is cleaned out;
(5) when liquid steel temperature 1600 ~ 1615 DEG C, come out of the stove, terminate roasting;
(6) shell mould roasting for step (5) is placed in pouring position, builds cup with iron covering plate, and in the gap back-up sand of shell mould; Complete whole operation.
On the basis of technique scheme, the present invention can also do following improvement.
Further, step (1) described furnace charge, must totally, dry, rustless, no-sundries.
Further, step (3) described slag former is the one in lime, fluorite, broken clay brick, described slag former must totally, dry, rustless, no-sundries.
Further, the Main Function of step (4) described deoxidier reacts with the oxygen that dissolves in molten iron, mainly generates nonmetallic compound, form precipitation and float up in slag blanket, the molten iron being removed pure; Described deoxidier is ferromanganese, ferrosilicon, calcium-silicon and aluminium, and described deoxidier must be dry, and described deoxidier addition sequence is followed successively by ferromanganese, ferrosilicon, calcium-silicon and aluminium.
Further, the described roasting shell mould of step (6), surface is in white or white powder.
The invention has the beneficial effects as follows: the present invention can make sodium silicate shell have low gas forming amount and good gas permeability, the temperature difference of liquid alloy and shell can also be reduced, improve mold-filling capacity, and then improve the product quality of precision casting, enhance productivity, reduce production cost.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with specific embodiment, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1:
The shell roasting method of investment pattern precision casting axle housing body, comprises following processing step:
(1) prepare burden: by the composition proportion requirement of cast product, weigh various shove charge furnace charge; Described furnace charge, must totally, dry, rustless, no-sundries;
(2) feed: furnace charge is delivered to electric smelter, fusing point is high, be difficult to melt, not oxidizable batching is placed in bottom electric smelter;
(3) connect electric smelter power supply, start melting; When there is molten steel, adding lime slag former, covering liquid steel level; When furnace charge amount >=80% of fusing, remove old slag, and keep liquid steel level to be coated with lime slag former;
(4) deoxidation: when liquid steel temperature >=1500 DEG C, adds deoxidier and carries out deoxidation, and supplements deoxidier in time; Described deoxidier is ferromanganese, ferrosilicon, calcium-silicon and aluminium, and described deoxidier must be dry, and described deoxidier addition sequence is followed successively by ferromanganese, ferrosilicon, calcium-silicon and aluminium; Leave standstill 2 ~ 3 minutes after deoxidation, deoxidation products is floated, and before coming out of the stove, slag is cleaned out;
(5) when liquid steel temperature 1600 ~ 1615 DEG C, come out of the stove, terminate roasting;
(6) shell mould roasting for step (5) is placed in pouring position, described roasting shell mould, surface is in white or white powder; Cup is built with iron covering plate, and in the gap back-up sand of shell mould; Complete whole operation.
Embodiment 2:
The shell roasting method of investment pattern precision casting axle housing body, comprises following processing step:
(1) prepare burden: by the composition proportion requirement of cast product, weigh various shove charge furnace charge; Described furnace charge, must totally, dry, rustless, no-sundries;
(2) feed: furnace charge is delivered to electric smelter, fusing point is high, be difficult to melt, not oxidizable batching is placed in bottom electric smelter;
(3) connect electric smelter power supply, start melting; When there is molten steel, adding fluorite slag former, covering liquid steel level; When furnace charge amount >=80% of fusing, remove old slag, and keep liquid steel level to be coated with fluorite slag former;
(4) deoxidation: when liquid steel temperature >=1500 DEG C, adds deoxidier and carries out deoxidation, and supplements deoxidier in time; Described deoxidier is ferromanganese, ferrosilicon, calcium-silicon and aluminium, and described deoxidier must be dry, and described deoxidier addition sequence is followed successively by ferromanganese, ferrosilicon, calcium-silicon and aluminium; Leave standstill 2 ~ 3 minutes after deoxidation, deoxidation products is floated, and before coming out of the stove, slag is cleaned out;
(5) when liquid steel temperature 1600 ~ 1615 DEG C, come out of the stove, terminate roasting;
(6) shell mould roasting for step (5) is placed in pouring position, described roasting shell mould, surface is in white or white powder; Cup is built with iron covering plate, and in the gap back-up sand of shell mould; Complete whole operation.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the shell roasting method of investment pattern precision casting axle housing body, is characterized in that, comprises following processing step:
(1) prepare burden: by the composition proportion requirement of cast product, weigh various shove charge furnace charge;
(2) feed: furnace charge is delivered to electric smelter, fusing point is high, be difficult to melt, not oxidizable batching is placed in bottom electric smelter;
(3) connect electric smelter power supply, start melting; When there is molten steel, adding slag former, covering liquid steel level; When furnace charge amount >=80% of fusing, remove old slag, and keep liquid steel level to be coated with slag former;
(4) deoxidation: when liquid steel temperature >=1500 DEG C, adds deoxidier and carries out deoxidation, and supplements deoxidier in time; Leave standstill 2 ~ 3 minutes after deoxidation, deoxidation products is floated, and before coming out of the stove, slag is cleaned out;
(5) when liquid steel temperature 1600 ~ 1615 DEG C, come out of the stove, terminate roasting;
(6) shell mould roasting for step (5) is placed in pouring position, builds cup with iron covering plate, and in the gap back-up sand of shell mould; Complete whole operation.
2. the shell roasting method of investment pattern precision casting axle housing body according to claim 1, is characterized in that, step (1) described furnace charge, must totally, dry, rustless, no-sundries.
3. the shell roasting method of investment pattern precision casting axle housing body according to claim 1, it is characterized in that, step (3) described slag former is the one in lime, fluorite, broken clay brick, described slag former must totally, dry, rustless, no-sundries.
4. the shell roasting method of investment pattern precision casting axle housing body according to claim 1, it is characterized in that, step (4) described deoxidier is ferromanganese, ferrosilicon, calcium-silicon and aluminium, described deoxidier must be dry, and described deoxidier addition sequence is followed successively by ferromanganese, ferrosilicon, calcium-silicon and aluminium.
5. the shell roasting method of investment pattern precision casting axle housing body according to claim 1, is characterized in that, the described roasting shell mould of step (6), and surface is in white or white powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640059.7A CN104439069A (en) | 2014-11-13 | 2014-11-13 | Method for roasting mold shell of investment pattern precision casting axle housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640059.7A CN104439069A (en) | 2014-11-13 | 2014-11-13 | Method for roasting mold shell of investment pattern precision casting axle housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104439069A true CN104439069A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410640059.7A Pending CN104439069A (en) | 2014-11-13 | 2014-11-13 | Method for roasting mold shell of investment pattern precision casting axle housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104439069A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077509A (en) * | 2016-07-26 | 2016-11-09 | 柳州金特新型耐磨材料股份有限公司 | A kind of rear axle housing body Technology for Heating Processing |
| CN114700465A (en) * | 2022-03-02 | 2022-07-05 | 中国电建集团郑州泵业有限公司 | A kind of roasting method of investment casting mould shell of last stage guide vane of double shell pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02197349A (en) * | 1988-12-16 | 1990-08-03 | Howmet Corp | Investment cast shell mold made of ceramic and manufacture thereof |
| US5069271A (en) * | 1990-09-06 | 1991-12-03 | Hitchiner Corporation | Countergravity casting using particulate supported thin walled investment shell mold |
| CN101147954A (en) * | 2007-10-29 | 2008-03-26 | 福建省建阳市汽车锻压件厂 | Investment precision casting process for producing automobile I-shaped front shaft |
| CN101862811A (en) * | 2010-02-09 | 2010-10-20 | 徐州胜海机械制造科技有限公司 | Rapid investment casting method of complex thin-wall component |
-
2014
- 2014-11-13 CN CN201410640059.7A patent/CN104439069A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02197349A (en) * | 1988-12-16 | 1990-08-03 | Howmet Corp | Investment cast shell mold made of ceramic and manufacture thereof |
| US5069271A (en) * | 1990-09-06 | 1991-12-03 | Hitchiner Corporation | Countergravity casting using particulate supported thin walled investment shell mold |
| CN101147954A (en) * | 2007-10-29 | 2008-03-26 | 福建省建阳市汽车锻压件厂 | Investment precision casting process for producing automobile I-shaped front shaft |
| CN101862811A (en) * | 2010-02-09 | 2010-10-20 | 徐州胜海机械制造科技有限公司 | Rapid investment casting method of complex thin-wall component |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077509A (en) * | 2016-07-26 | 2016-11-09 | 柳州金特新型耐磨材料股份有限公司 | A kind of rear axle housing body Technology for Heating Processing |
| CN114700465A (en) * | 2022-03-02 | 2022-07-05 | 中国电建集团郑州泵业有限公司 | A kind of roasting method of investment casting mould shell of last stage guide vane of double shell pump |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |