JPS63309630A - Traveler for spinning machine - Google Patents

Abstract

PURPOSE:To obtain the titled traveler, having excellent abrasion resistance and contriving prolonged life with hardly any initial yarn breakage, by forming an alloy steel wiry material containing C, Cr and V into the shape of a traveler, subjecting the formed wiry material to carburizing and hardening treatment to form a martensite structure. CONSTITUTION:The aimed traveler obtained by forming an alloy steel wiry material containing <=0.6% C, 0.6-1.5% Cr and 0.15-0.5% V into the shape of a given traveler and subjecting the formed wiry material to carburizing and hardening treatment to form a martensite structure containing 0.8-1.8% C.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to an improvement of a spinning machine traveler used in spinning machines, yarn twisting machines, and the like.

<Conventional technology and its problems> Conventionally, metal travelers for spinning machines used in spinning machines and yarn twisting machines come in various shapes such as vertical, horizontal, and conical, and they are used depending on the purpose. ing.

However, in the spinning industry, which has a harsh spinning environment where high-volume production and high-speed spinning are carried out, a traveler with high abrasion, less yarn breakage, and less yarn fuzz is required from the viewpoint of stable operation and economy. . Conventionally, hardened carbon steel containing L8 to L1% carbon has been used to impart this long life and anti-friction properties, but the wear resistance is insufficient and the life is shortened. However, there was a problem in that it was not possible to obtain a product that satisfied the above requirements.

<Means to Solve the Problems> The present invention solves the above-mentioned conventional problems.
After forming the alloy steel machine containing the Or, 'I elements into a traveler shape, the carbon concentration is increased through carburizing and quenching to create a martensitic structure, thereby providing a traveler with high wear resistance.

<Function> Carbon dissolved in austenite during carburizing serves to strengthen martensite during quenching, and mata and chromium improve the toughness of martensite. Furthermore, vanadium becomes a fine carbide, which is effective in refining crystal grains and improving toughness.

<Example> Ct-0.5% 4 Cr tocIb%v 0.2%
The contained alloy steel wire is formed into a predetermined traveler shape, and
Carburizing at 0°C for 90 minutes in an RX gas atmosphere followed by 850°C
The traveler of the present invention containing 1.1 h of C was obtained by quenching in oil at a temperature of 20 °C and tempering at 20 °C x 10 min.

As shown in Figure 1, the cross-sectional metallographic structure of the traveler above shows that KCr is solidly dissolved in the martensite base +11 containing 1.1 h of C due to carburization, and fine vanadium carbide (2) is dispersed◇ of the material. The amount of C is preferably 0.6 inches or less, and if it is more than that, the workability during forming the tongue bellows will be poor. Moreover, Cr is 0.6~
1.5%, V is preferably 0.15 to 0.5%; if it is less than the lower limit, the desired effect cannot be obtained, and if it is more than the upper limit, workability will deteriorate. If the Cf after carburizing is less than 0.8%, wear resistance cannot be obtained, and if it is more than L8%, it tends to become brittle.

A spinning test was conducted using the traveler for a spinning machine of the present invention under the following operating conditions.

Thread: Ester/cotton 40' day ring: A2・Flange 45・, pf trapella: Z B B/ hf A310 spindle rotation speed: l 5. OQ Or, p, m.

As shown in Fig. 2, the results of the spinning test showed that the product A of the present invention had about 40% less wear than the conventional product B after one month of use, and its life was significantly improved.

As for the number of thread breakages, as shown in Figure 3, the number of thread breakages is the same as before in the initial stage of use, but a stable state can be maintained.
Compared to conventional travelers, it can be used for about five times as long.

<Effects of the Invention> The present invention has the above-mentioned configuration, and compared to conventional products, the initial yarn breakage is unchanged, stable operation is maintained, and the wear resistance is improved, making it possible to extend the life of the spinning material. This invention has excellent effects such as stable operation and meeting economic requirements.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional metallographic diagram of a traveler for a spinning machine showing one embodiment of the present invention, Fig. 2 is a curve diagram showing the relationship between the number of days of use and traveler wear loss, and Fig. 3 is a graph showing the relationship between the number of days of use and the traveler wear loss. It is a curve diagram showing the relationship with the number of cuts. +1+...Martensite base (2)...Vanadium carbide Figure 1 Figure 2 +0203040 &Number of crying days (B) Figure 3A Number of days for length

Claims (1)

[Claims] C: 0.6% or less, Cr: 0.6 to 1.5%, V: 0.
An alloy steel wire containing 15 to 0.5% is formed into a predetermined traveler shape, and then carburized and quenched to reduce the carbon content to 0.8.
A traveler for a spinning machine, characterized in that it forms a martensitic structure containing ~1.8%.