JPS62174348A - Metallic traveler for spinning machine - Google Patents

Abstract

PURPOSE:To provide the titled long life traveler superior in toughness and resistances for wear and heat and having little quantities of snapped and napped yearns under high production and high speed spinning conditions, by forming of alloy steel contg. prescribed ratios of C, Si, Mn and one kind or more among Al, Cr, Mo respectively. CONSTITUTION:The metallic traveler is formed of alloy steel contg. one kind or more among 0.5-3.0% Al, 1.0-3.0% Cr, 0.1-0.5% Mo respectively in addition to 0.2-0.6% C, <=0.6% Si, 0.6% Mn. The metallic traveler is superior in resistances for wear and heat compared with conventional product and capable of remarkably decreasing generation frequency of traveler seizing and aiming long life. Since the metallographic structure is uniform, breakage, etc., are not caused at fitting to ring of traveler or at high speed revolution while sliding with ring, and toughness can be remarkably improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a metal traveler for spinning machines used in spinning machines, yarn twisting machines, and the like.

Conventional technology Conventionally, metal travelers for spinning machines used in spinning machines and yarn twisting machines generally use hard steel wire rods, which are formed into various shapes such as horizontal, vertical, and conical, and undergo hardening treatment by quenching and tempering. Surface treatments such as nickel plating and chrome plating are applied, and each material is used depending on its purpose.

Problems that the invention aims to solveHowever, in the recent spinning industry, where high production and high speed spinning are performed, strict spinning conditions and improved operational efficiency are required, wear resistance is required from the viewpoint of stable operation and economics. There is a demand for a traveler with excellent durability, long life, less traveler burn, and less thread breakage and thread fuzz.

Therefore, in the conventional traveler mentioned above, the wear resistance during high-speed operation,
There were problems in that heat resistance was insufficient, traveler burn occurred, hardness decreased, and the above requirements were not satisfied in terms of life.

Means for Solving the Problems The metal traveler for spinning machines of the present invention solves the above-mentioned conventional problems, and contains 2 to 0.6% of CO, 6% or less of SiO, and 6% or less of MnO. Contains and further contains Aeo, 5
~3.0%, Crl, 0-3.0%, or MoO
, 1 to 0.5%, etc., is made of alloy steel containing at least one element that forms nitrides, and under high production and high speed spinning conditions, there is less yarn breakage and yarn fluff, and it has good toughness and wear resistance. The present invention provides a metal traveler for a spinning machine with a long life and excellent durability and heat resistance.

Note that C is an element that is effective in increasing the hardness of quenching and tempering and improving wear resistance, but if it is less than 0.2%, the effect of wear resistance will decrease, and if it exceeds 0.6%, it will cause large Abnormal structures such as ferrite often appear around carbides, which tends to cause uneven hardness, lower toughness, and poor workability.

8i has traditionally been added for the sole purpose of deoxidizing molten steel and improves tempering hardness, but if it exceeds 0.6, toughness decreases.

Blood is necessary to some extent because it changes the form of harmful inclusions in Try 2 and makes them more harmless, but since retained austenite increases during quenching and hardness decreases, 0.6 or less is good.

Al has a strong affinity with nitrogen and is highly effective in increasing surface hardness during nitriding, but if it is less than 0.5%, it has no effect (and if it exceeds 3.0%, the toughness decreases.

Cr is a carbide-forming element that improves wear resistance, heat resistance, hardenability, etc., and also contributes to increased hardness through nitriding.
．． If it is less than 0%, the effect of heat resistance in particular decreases, and the corrosion resistance also deteriorates, and if it exceeds 3.0%, huge carbides are generated, the toughness decreases, the plastic workability decreases, and the economy becomes worse. It's not desirable either.

Mo makes carbides finely uniformly distributed and improves toughness, but 0
．． If it is less than 1%, the effect will decrease, and if it is less than 0.5%
Exceeding this is economically unfavorable.

EXAMPLE An example of a metal traveler for a spinning machine according to the present invention will be described below with reference to the drawings.

C! 0.47%, SiO, 18%, MnO, 40%
, Al 0.89%, Cr 1.51%, Mo 0.2
0%, balance Fe and normally included impurities CP, S
As shown in Figure 1 B) (B) and (C), a predetermined horizontal traveler (1), conical type G2 (2),
Formed into a vertical traveler (3) etc., quenched and tempered, then subjected to ion nitriding treatment at 500°C for 2 hours.
A metal traveler for a spinning machine having a 50P nitride layer was formed.

The surface layer of the traveler has a surface hardness of 8 as shown in Figure 2.
A nitrided layer (4) of 00 to 1100 Hv is formed, and this nitrided layer (4) works effectively on the ring contact surface when the traveler runs, exhibiting anti-friction properties and reducing friction! , the number of IS is low,
6. Improved eating performance and compatibility with the ring.

Note that the alloy steel used as the material for forming the traveler contains C.
O, 2~0. f1%, SiO, 6% or less, Mn0.
Contains 6% or less, further A/' 0.5 to 3.0%,
Crl, 0~a, O% or MoO, 1~0.5
It is desirable to contain one type or two or more types of %.

Further, the nitriding treatment can be performed by gas soft nitriding, gas nitriding, salt bath nitriding, or the like. Note that the compound layer formed on the outermost layer of the nitrided layer is fragile, so it is preferable to remove it by barrel polishing or the like and provide only the nitrogen diffusion layer.

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

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/Cotton 45' Ring: 3.2g Flange 41 nm Traveler: Y
B2 Black 1210 Spindle rotation speed: 270 r) Cr, p, m.

As shown in Figure 3, the results of the spinning test show that the product (4) of the present invention has a wear amount of about 40% compared to the conventional product (8) after 10 days.
%, the lubrication properties have improved, the frequency of traveler burns has decreased, and the service life has been significantly improved.

Furthermore, as shown in FIG. 4, the number of thread breakages was slightly lower than that of the conventional product (9) at the initial stage of use, but remained stable as days passed, and the service life was extended about three times.

Effects of the Invention The metal traveler for spinning machines of the present invention contains CO, 2 to 0.6%, and S.
Contains iO, 6% or less, Mn 0.8% or less, Ar 0.5-3.0%, C! r1.0-3.0%, or M.

Since the metal traveler is made from alloy steel containing one or more of O, I - 0.5%, it has superior wear resistance and heat resistance compared to conventional products, and traveler burnout occurs more frequently. This has made it possible to achieve a long service life.

In addition, because it has a uniform metal structure, there is no breakage when fitting the traveler into the ring or when it slides into contact with the ring at high speed, and its toughness can be significantly improved. be.

In addition, the coefficient of friction is lower than conventional products, and it fits well with the ring, so it can maintain an operating state with less yarn breakage and less fuzz, especially for high-speed spinning with spindle rotation speeds of 25,110 Cr, p, m, or higher. This invention has other effects such as being able to achieve stable operation.

[Brief explanation of drawings]

Figures 1B), (B), and (C) are front views of a metal traveler for a spinning machine 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 the traveler. FIG. 4 is a curve diagram showing the relationship between wear loss and the number of thread breakages. (1)...Horizontal traveler (2)...Conical type traveler (2) (3)...Vertical traveler (4)...Nitride layer Figure 1 Figure 2 Figure 3 Figure 4: Beyominu (town)

Claims (2)

[Claims] (1) C0.2-0.6%, Si0.6% or less, Mn0
．． Contains 6% or less, and further contains 0.5 to 3.0% Al, C
A metal traveler for a spinning machine, characterized in that it is made of alloy steel containing one or more of r1.0 to 3.0% or Mo0.1 to 0.5%. (2) The metal traveler for a spinning machine according to claim 1, characterized in that a nitrided layer is formed on the surface.