JPH0832980B2 - Traveler for spinning machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of a traveler for a spinning machine used in a spinning machine, a twisting machine, and the like.

Conventional technology and its problems Recently, in the spinning industry, which is operated at low cost in addition to the severe spinning environment where high production and high-speed spinning are performed, a long-life and inexpensive traveler is required. There is.

Conventionally, as the material of the traveler, a carbon steel wire rod or a low alloy steel wire rod that has been subjected to normal quenching and tempering treatment has been used, but it was insufficient in terms of life. On the other hand, it is possible to use a high alloy steel wire rod to form a traveler having a long life, but there is a problem that not only the material is expensive, but also the processing and treatment costs are high.

Means for Solving the Problems The present invention has been made to eliminate the above-mentioned problems, and an alloy steel wire rod containing a C content of 0.8% to 1.1% and a Cr content of 0.8 to 1.5% is prescribed. By forming it into a traveler shape, carburizing or carburizing and then quenching and tempering it is possible to disperse the coarsened spherical chromium carbide in the martensite base, or to disperse the coarsened spherical chromium carbide and nitrogen. The present invention provides a spinning traveler having a high wear resistance which is solid-solution diffused.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Example 1. As shown in FIGS. 1 (a) and 1 (b), C is 1%, Cr
Of a bearing steel wire containing 1.5% of carbon steel was drawn to a specified wire diameter, spheroidized and annealed, then formed into a specified traveler shape, and carburized and quenched in a carburizing gas atmosphere of high concentration with a carbon potential of 1% or more. After that, tempering is performed to form a traveler (1) for a spinning machine having a metal structure having excellent wear resistance.

The cross-sectional metallographic structure of the traveler (1) has an average grain size of 1 to 3 μm in the martensite matrix (2) as shown in FIG.
It has a structure in which coarsened spherical chromium carbide (3) is dispersed.

Therefore, the structure of the traveler (1) of the present invention is excellent in heat resistance as a high carbon solid solution martensite, and the coarsened spherical chromium carbide has a plastic deformation resistance against a high surface pressure load as compared with the conventional structure. It has extremely high wear resistance because it is excellent in wear resistance.

Also, it is desirable that the amount of C contained in the alloy steel wire used as the material of the traveler (1) is in the range of 0.8 to 1.1% and the amount of Cr is in the range of 0.8 to 1.5%. Carburization is required and the cost becomes high. If it exceeds 1.1%, carburizing atmosphere formation with high concentration carbon potential causes sooting and non-uniform carburization. If the Cr content is less than 0.8%, the amount of coarse spheroidized chromium carbide effective for improving wear resistance is small, and if it is more than 1.5%, the workability is poor and the cost is high.

A spinning test was conducted on the above-mentioned traveler for a spinning machine of the present invention under the following conditions.

Thread: Ester / cotton 40's Ring: Flange width 3.2mm Inner diameter 45mmφ Traveler: ZSB / hf 9/0 Spindle speed: 16,500rpm Test time: 50 hours Spinning test results show wear amount as shown in Fig. 3. However, compared to the conventional spinning traveler, the spinning traveler of the present invention has about 30
%, And life improvement was recognized. The traveler used as a conventional product is one that has been subjected to normal quenching and tempering.
The metallic structure is such that fine spherical chromium carbide having an average particle size of 1 μ or less is dispersed in the matrix.

Example 2. A traveler molded into a predetermined shape by using the same material as in Example 1 is carburized, carbonitrided and quenched in an atmosphere in which a few% NH ₃ gas is added to a carburizing gas having a carbon potential of 1% or more,
After that, tempering is performed to form the traveler (1) for a spinning machine of the present invention.

The metallographic structure of the traveler obtained by the heat treatment,
Although similar to the structure obtained in Example 1, it has a feature that the solid solution of nitrogen in the matrix makes the matrix excellent in heat resistance.

This feature has been applied to the conventional spinning traveler and the embodiment of the present invention.
Comparing the tempering temperature at the same base hardness (600 ± 20 Hv) with the No. 1 spinning traveler, the product of the present invention is 100 to 150 ° C. as compared with the conventional product and 40 to 60 as compared with the product of Example 1 as shown in FIG. ℃
It was confirmed that the heat resistance was improved.

As a result of carrying out a spinning test on the traveler for a spinning machine of the present invention under the same conditions as in Example 1, it was found that the wear resistance was improved to be substantially equal to or higher than that in Example 1.

EFFECTS OF THE INVENTION Since the traveler for a spinning machine of the present invention has the above-mentioned configuration, the amount of C contained in the alloy steel wire increases due to carburization, and therefore, more C sticks to Cr in the alloy steel wire rod, and chromium carbide Grows while becoming spherical and becomes coarse. This coarsened spheroidized chrome carbide provides extremely high wear resistance and significantly extends the life of the traveler.

In addition, when the carburizing and dipping chamber is carried out, nitrogen is dissolved in the base material as a solid solution, so that the base material has excellent heat resistance and a high spinning speed.

[Brief description of drawings]

1 (a) and (b) respectively show one embodiment of the traveler for a spinning machine of the present invention, (a) is a front view of a horizontal traveler, (b)
Is a front view of a conical traveler, and FIG. 2 is FIG. 1 (a).
FIG. 3 is an explanatory view of a cross-sectional metallographic structure of a spinning traveler, FIG. 3 is a bar graph showing a comparison of wear reduction between the spinning traveler of the present invention and a conventional spinning traveler, and FIG. 4 is a spinning traveler of the present invention and a conventional one. 3 is a bar graph showing the relationship between the tempering temperature and the above-mentioned traveler for spinning machine at the same base hardness. (1) …… Traveller for spinning machine (2) …… Martensite base (3) …… Chromium carbide

Claims (2)

[Claims] 1. A C content of 0.8% to 1.1% and a Cr content of 0.8% to 1.
An alloy steel wire rod containing 5% is formed into a predetermined traveler shape, and spherical chrome carbide particles having an average particle size of 1-3 µ are dispersed in the martensite matrix by carburizing, quenching, and tempering treatment. A traveler for spinning machines. 2. A C content of 0.8% to 1.1% and a Cr content of 0.8% to 1.
An alloy steel wire rod containing 5% is formed into a predetermined traveler shape, and a carburizing chamber and quenching, in a martensite base by tempering treatment, an average particle diameter is dispersed to a spherical chromium carbide coarsened to 1-3μ, Further, a traveler for a spinning machine, which is characterized in that nitrogen is dissolved and diffused.