JPS62149847A - Metallic traveler for spinning machine - Google Patents

Abstract

PURPOSE:To produce a metallic traveler for a spinning machine having excellent toughness, wear resistance and heat resistance by subjecting pulverized powder of a high-speed tool steel to sintering, compacting, drawing and heat treatment. CONSTITUTION:The pulverized powder of the nitrogenous high-speed tool steel contg. 3.0-5.0% Cr, 3.0-10.0% Mo, 1.5-11.0% W, 0.8-5.3% V, and <1.3% C, and contg. C+N in a 0.7-2.0% range is subjected to sintering, compacting, hot rolling, warm drawing, cold drawing and cold rolling to produce a wire having a prescribed sectional shape. Such wire is worked to the metallic traveler for the spinning machine to be used for a yarn twister, etc., by a forming machine and thereafter the traveler is subjected to hardening and tempering treatments. Fine and hard metallic carbide 5 and carbonitride 6 are uniformly dispersed into a martensite base 4. The metallic traveler for the spinning machine which has excellent wear resistance, heat resistance and toughness, decreases the burn of the traveler and is usable for a long period of time is thus obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a metal trapeller for spinning machines used in spinning machines, cat threads, etc.

Conventional technology Conventionally, hard H4 wire rods are generally used for metal trapellers for spinning machines used in spinning machines and yarn twisting machines.They are formed into various shapes such as N1 horizontal, vertical, and conical, and are hardened by quenching and tempering. Surface treatments such as porcelain, nickel plating, and chrome plating are applied, and each material is used depending on its purpose.

Problems to be Solved by the Invention However, in the recent spinning industry, where high production and high speed spinning are carried out, and where improvements in operational efficiency are required, it is difficult to withstand from the viewpoint of stable operation and economics. There is a demand for a traveler with excellent abrasion resistance, long life, less traveler burn, and less thread breakage and thread fuzz.

Therefore, the above [ii! Travelers made of scrap wire have insufficient abrasion resistance and heat resistance during high-speed operation, and have a problem in that they do not meet the above requirements in terms of service life.

Therefore, a method of obtaining a highly hard metal travel 2 using steel containing W, Mo, Or, V, Co, etc. was considered, but when the carbide solidifies, the carbide is locally segregated in a striped or network shape. Unfortunately, the metal trappeller tends to break when it is fitted into the ring, or when it slides into contact with the ring at high speed.

Means for Solving the Interference Point The metal trapeller for spinning machines of the present invention solves the above-mentioned conventional problems, and has at least a: 1.3% or less, C
r: 3. Q ~5.0%, Ha: 3. O
~10.0%, W: 1.5~11.0%, V: 0.8~
With 5.3% as the basic composition, C! +Nli is 0.7 to 2
．． The powder of high-speed tool steel, which satisfies the relationship of 0% and consists of iron and impurities in the balance, is processed into a wire rod from a material that is sintered and consolidated, the wire rod is formed into a predetermined trapezoidal shape, and the wire is made uniform and fine by heat treatment. The structure has been formed into a metallic structure with a distribution of carbides and carbonitrides, and under high production and high speed spinning conditions, there is less yarn breakage and yarn fuzz, and it has long lengths with excellent toughness, abrasion resistance and heat resistance. It provides a gold 4 traveler for spinning machines with a long life.

1. Below, one embodiment of the metal trapeller for a spinning machine of the present invention will be described based on the drawings.

Example 1m formed by nitriding gas atomized steel powder! :
0.49%, Or: 4.35%, Mo: 5.1
2%, W: 6.1%, V: 2.0%, O+N: 1.05
%, with the remainder consisting of iron and impurities.The fine powder of high-speed tool steel is sintered and consolidated by all-H engineering P treatment, and then hot-rolled, warm-drawn, cold-drawn, and cold-rolled. Obtain a wire rod with a predetermined cross-sectional shape, and form it into a predetermined horizontal trapella (1), conical trapella (2), vertical trapella (3), etc. using a molding machine as shown in Figure 1 (a), (b), and (c). Then, after quenching, tempering was performed to form a metal traveler for a spinning machine having a hardness of Hv 800 or more.

As shown in Figure 2, the cross-sectional metallographic structure of the traveler is such that spherical hard carbides (5) and carbonitrides (6) are uniformly and finely distributed in the martensite base (4) of the traveler. When an object runs on a trapper, it works effectively on the ring contact surface and exhibits anti-friction properties.

In addition, the powder high speed steel used as the traveler forming material contains at least C: 1.8% or less, cr: 8, 0 to 5.0.
%, Mo: 3.0-10.0%, W: 1.5-11
．． 0%, V: 0.8-5.8%, O+N: 0.7-2.
It is desirable to include the range of 0%.

C melts into the matrix to increase its strength, and when it forms carbides with W, Mo, Or, etc., it also forms carbonitrides with N.
Improves wear resistance.

CI-tl should be 3% or less, and O+N should be 0.
It is appropriate to perform nitriding treatment so that the content is in the range of 7 to 2.0%; if it is less than 0.7%, wear resistance will be poor;
The wear resistance effect does not increase even if the

Or forms carbonitride and improves hardenability.1. Although thermal elbow oxidation resistance is improved, if it is less than 3.0%, there is no effect on wear resistance, and even if it exceeds 5.0%, the effect on wear resistance does not increase.

Mo and W form precipitates such as carbides and carbonitrides, and are solidly dissolved in the matrix to improve wear resistance and high temperature hardness.
If the content is less than the above, the effect on Ia wear resistance will be small, and if it exceeds the content, the 'gJ' note will be impaired.

In addition, V forms carbides and contributes to improving wear resistance, but if it is not added at 0.8%, the effect on wear resistance is small;
．． The effect does not increase even if it exceeds 3%.

Mano, in addition to the above ingredients, C! o: It can also contain 20% or less. Containing Co has the effect of strengthening the base and increasing high temperature hardness, but if it exceeds 20%, toughness decreases.

Furthermore, if the traveler surface is coated with nickel plating, dispersion plating, resin coating, etc., wear resistance and conformability will be further improved.

In addition to the HIP method, there are hot extrusion methods, hot pressing methods, and the like as methods for increasing the sintering pressure of powder.

A spinning test was conducted on the metal traveler for a spinning machine according to the present invention under the conditions shown below.

Thread: Ester/#l 145" Ring = 3.2 thread Flange 411 scrap Traveler: Y
S 2 Jhx”/.

Spindle rotation speed: 25,000 r, p, m The results of the spinning test are shown in Figure 3, where the product of the present invention (4) is superior to the conventional product (
Compared to B), the amount of wear was reduced by 40% after 20 days, the lubrication properties were improved, the frequency of traveler burn was reduced, and the life was significantly improved.

Furthermore, as shown in Fig. 4, the number of thread breakages was slightly less than that of the conventional product (Bl) in the early stages of use, but the product remained stable as days passed, and the service life was approximately doubled.

Effects of the Invention The metal traveler for spinning machines of the present invention has at least Or: 3.0.
~5.0. Mo: 3.0-10.0%, W: 1.5
Nitrogen-containing powder containing ~11.0%, '/: 0.8~5.3%, Kak(!: 1.3% or less, O+N: 0.7~2.0%, high speed tool) By wire-drawing and heat-treating the material obtained by sintering and compacting the tower powder, it is possible to form a metal traveler with a metal structure in which uniformly fine carbides and carbonitrides are distributed. There is no breakage, etc. caused by the segregation of carbides when attaching a face plate to a trapeller ring, or when it rotates in sliding contact with a cage ring at high speed, and it can significantly improve cutting performance. be.

In addition, because it has a metal structure with a uniform distribution of fine carbides and carbonitrides, it has superior heat resistance and wear resistance compared to conventional products.
It has become possible to achieve a long life.

In addition, although the initial thread breakage is not much different compared to conventional products, stable operation can be maintained, especially when the spindle rotation speed is 2500 Or.
This invention has excellent effects such as being able to achieve stable operations in the field of high-speed spinning of p, m or more.

[Brief explanation of drawings]

Figures 1 (a), (b), and (c) are front views of metal trapellers for spinning machines showing one embodiment of the present invention, Figure 2 is a cross-sectional metallographic diagram of the same, and Figure 8 is the number of days of use and wear of the trapella. FIG. 4 is a curve diagram showing the relationship between the number of days of use and the number of thread breakages.

Claims (1)

[Claims] At least Cr: 3.0-5.0%, Mo: 3.0-10
．． 0%, W: 1.5-11.0%, V: 0.8-5.3
%, and C: 1.3% or less, C+N: 0.7~
A metal traveler for a spinning machine, characterized in that it is made of 2.0% nitrogen-containing powder high-speed steel.