JPS62125024A - Metallic traveller for spinning machine - Google Patents

Abstract

PURPOSE:The titled traveller making stable and durable continuous operation possible, having improved corrosion resistance and wear resistance, by forming a crystallized nickel phosphide alloy layer having high hardness by chemical plating on part of the metallic traveller to be brought into contact with a ring flange. CONSTITUTION:A film of coating of amorphous alloy plating having usually 0.02-15mu thickness and preferably 6-12% phosphorus content is formed on the surface of a metallic traveller 3 at least to be brought into contact with a ring flange by chemical nickel phosphorus plating. Then, the traveller is heat-treated preferably at 330-380 deg.C for 60-120min and a precipitated hard alloy layer 2 (texture wherein Ni 5 is dispersed into Ni3P base material 4) of crystallized nickel phosphide (Ni3P) having 800-1,000 hardness is formed to give the aimed traveller.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement of a metal traveler for a spinning machine which has excellent wear resistance and durability.

Conventional technology and its problems Conventionally, metal travelers used in spinning machines, yarn twisting machines, etc. are required to have wear resistance under harsh operating conditions due to sliding at high speed on the ring flange surface. Ru. Therefore, in order to provide this wear resistance, hard steel wire or alloy steel wire is used as a material, and after being formed into a predetermined shape, it is hardened and the surface is then coated with chromium plating, etc., to provide wear resistance. It is having an effect.

However, under the high-speed, high-production system in modern spinning factories, wear resistance is insufficient and the wear wears out quickly, and the traveling of the traveler is unstable, resulting in frequent yarn breakage and fuzzing. This occurs frequently, causing early seizure and scattering of the traveler. In such high-speed production, there is a strong desire to extend the life of the traveler.

Therefore, as a means to improve the abrasion resistance and durability of the traveler described above, the traveler that has been subjected to lip plating has a coating hardness of He 800 or higher, but the plating surface is prone to cracking and peeling wear. This causes abnormal wear on the traveler. Furthermore, the coating hardness of nickel plating is as low as 300 to 400 HtJ, and the durability of the coating is short during high-speed operation.Once the coating disappears, wear progresses rapidly, and the tension is high, resulting in thread breakage, traveler burn, tabs, and rollers. There is a problem that spinning becomes impossible due to scattering, etc.

Means to solve problems The present invention solves these problems.

That is, an electroless nickel-phosphorus amorphous alloy plating IW is provided on the base surface of at least the portion of the metal traveler that contacts the ring 7 flange, and further heat treatment is performed to form crystallized nickel phosphide (with a hardness of Htsoo~1000). N
The purpose of the present invention is to provide a metal traveler that has good adhesion to the substrate, is hard, and has excellent wear resistance and durability by forming a precipitation hardened alloy layer of i3P).

Example An embodiment of the present invention will be described below based on the drawings.

As shown in FIG. 1, a metal traveler 1 of a desired shape is formed using a hard fJA wire rod or an alloy m wire rod, and then quenched and tempered (tm). The base surface that contacts at least the ring 7 flange of the traveler has a thickness of 0.02μ or more and 15μ.
The following amorphous alloy plated by electroless nickel phosphorus plating M? Form. The phosphorus content in the amorphous electroless nickel-phosphorous alloy film is adjusted to rapidly increase from 4 to 15% (preferably 6 to 12%), and is further heat treated (at approximately 350°C for 1 hour). As a result, the hardness is 900H
Crystallized nickel phosphide N i s P of around 1+ forms a precipitation-hardened alloy metal 2 .

By the way, the layered structure of the nickel-phosphorus alloy plating layer, which was amorphous and had a layered structure due to the above heat treatment, gradually disappeared as the layered structure was heated, and the phosphorus gradually changed to nickel phosphide (Ni).
3P).

In the above example, if the phosphorus content is 10%, the precipitation hardened alloy JI2 formed on the surface of the traveler base material 3 exhibits a structure in which Ni5 is dispersed in the N15P substrate, as shown in FIG. did.

The thickness of the plating film was set to be 0.02μ or more and 15μ or less, but if it is less than 0.02μ, the durability will decrease and it will interfere with continuous operation, so if it exceeds 1 or 15μ, the plating skin will become rough and the traveler This is not preferable because it causes unevenness in running, increases processing time, and increases costs.

As for the above heat treatment conditions, as shown in Fig. 3, when increasing the coating hardness Ct of one plating layer to a maximum of approximately Htl 1000, the heat treatment temperature is 400°C and is achieved in one hour. Hl) due to the reversal effect
500, and the traveler hardness is insufficient, resulting in poor elasticity and reduced wear resistance.
Therefore, the optimum conditions for maintaining the traveler base material hardness 'fr: HtI around 600 and obtaining the coating hardness of the plating layer around H11900 are a treatment temperature of 330°C to 380°C and a treatment time of (4) minutes to 120 minutes. be.

Further, the tempering step before plating may be performed after plating, or may be omitted.

Test 1 for comparison of the metal traveler A of the present invention and the conventional metal traveler (nickel-plated product) B under the following conditions.
The results are shown in Figures 4 and 5.

Thread: Cotton 40'S Ring: Single franc ring 7 Lunge width 3.214
5φ spindle rotation speed: 1600 (1, AM 7
): 24 T/in Traveler: Low center of gravity box type traveler MS/hf 610
Effects of the Invention Due to the above configuration of the present invention, although the number of initial thread breakages is the same as shown in FIG. 4 compared to the conventional metal traveler, stable operation is maintained and continuous operation is possible. Moreover, the excellent corrosion and wear resistance of the nickel-phosphorus (Ni3P) alloy plating film, which has high hardness and good 'fj adhesion, extends the life of the traveler as shown in Figure 5, and contributes to stable operation and economical spinning operations. This invention has excellent effects such as meeting the requirements.

[Brief explanation of drawings]

Fig. 1 is a front view of a metal traveler showing one embodiment of the present invention, Fig. 2 is a partially enlarged sectional view of Fig. 1, and Fig. 3 shows heat treatment temperature, nickel-phosphorous alloy plating film hardness, and traveler base material. A correlation diagram showing the relationship with hardness, Figure 4 is a curve diagram showing a comparison between the number of broken threads and the number of days of use of the present invention and the conventional traveler, and Figure 5 is a curve diagram showing the relationship between the number of days of use and wear loss. It is. 1...Metal traveler 2...Precipitation hardened alloy layer #≠Kouan 3...Traveler base material 4...1Vi3F substrate 5...Ni Patent applicant Hiroshi Kanai 2nd Masato Kiyoshi Hayashi Meiji 1 ．． Figure 2 Figure 3 compilation, 98 week prefecture (pi)

Claims (1)

[Claims] A precipitation-hardened alloy layer of crystallized nickel phosphide (Ni3P) having a hardness of Hv800 to 1000 is formed by electroless nickel-phosphorus alloy plating on the base surface of at least the part of the metal traveler that contacts the ring flange. A metal traveler for spinning machines.