JPH0533244A - Reed material for loom - Google Patents

Abstract

PURPOSE:To obtain a reed material having excellent abrasion resistance by using a martensitic stainless steel containing C, Si, Mn, Cr and Mo or V at respective specific wt.%. CONSTITUTION:A martensitic stainless steel containing 0.6-0.95wt.% C, <=1.0wt.% Si, <=1.0wt.% Mn, 12-18wt.% Cr and the balance Fe and inevitable impurities or a steel produced by adding 0.2-3.0wt.% Mo and/or 0.05-0.3wt.% V to the above martensitic steel is used as a raw material, subjected to repeated drawing and annealing and pressed by rolling. The hardness of the product is adjusted to HV430-450 by quenching and annealing to obtain the objective reed material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material for a lead used in a weaving machine for producing a woven fabric and for driving a weft thread put into a shed.

[0002]

2. Description of the Related Art Conventionally, as a material for a lead used in a loom, a strip of austenitic stainless steel SUS304 or ferritic stainless steel SUS430, which is excellent in abrasion resistance with threads, is used. It had been. However, with the recent increase in the speed of looms,
The usage conditions of the leads are becoming more and more severe, and it is becoming difficult for the leads using the conventional materials described above to cope with the demands, and leads having higher abrasion resistance are required. Therefore, austenitic stainless steel SUS304
Attempts have been made to increase wear resistance by increasing hardness by work hardening.

[0003]

In the conventional lead material,
Even if the hardness is increased by work hardening, the hardness is HV40.
Since it is about 0 to 450, the wear of the reed due to friction with the yarn is severe against continuous use by a high-speed loom, the shape of the reed changes early, and the weaving quality is deteriorated. Therefore, the leads had to be replaced in a short period of time, which greatly hindered productivity.

The present invention has been made in view of the above points, and an object of the present invention is to provide a lead material for a loom which has excellent wear resistance and is easy to manufacture.

[0005]

In order to achieve the above object, the lead material for a loom of the present invention has a weight percentage of C: 0.60 to 60.
0.95, Si: 1.0 or less, Mn: 1.0 or less, Cr: 12
.About.18, balance Fe and unavoidable impurities. More preferably, in the above structure, Mo: 0.2-by weight%.
One or two kinds of 3.0 and V: 0.05 to 0.3 are added.

The reason why the chemical composition of each additive element is limited is as follows. C is an important element that gives the lead material the necessary hardness and contributes to the improvement of wear resistance by forming fine hard Cr carbide. In order to obtain these effects, at least 0.6% or more is necessary. However, if it exceeds 0.95%, the toughness and workability are impaired, so this was made the upper limit.

Si is added as a deoxidizing agent, but if it exceeds 1.0%, the workability is impaired and the toughness also decreases, so the upper limit was made 1.0%.

Mn is an element which is added as a deoxidizer like Si and which increases the strength. However, if it exceeds 1.0%, the workability is impaired, so the upper limit was made 1.0%.

[0009] Cr dissolves in the matrix to improve the corrosion resistance. Some are important elements that form carbides and give wear resistance. In order to exert these effects, at least 12% or more is required in balance with C. However, if it exceeds 18%, the workability is deteriorated, so this was made the upper limit.

Mo and V increase the resistance to temper softening and form hard carbides to improve wear resistance. In order to obtain these effects, Mo is at least 0.2%
The above is necessary. However, even if added over 3.0%,
The increase in the effect is not remarkable and the toughness is lowered, so the range is 0.2 to 3.0%. And V is required to be at least 0.05% or more. However, if added in excess of 0.3%, the workability and toughness will be impaired, so the range is set to 0.05 to 0.3%.

[0011]

In the lead material for a loom of the present invention, the steel having the above-mentioned chemical composition is martensitic stainless steel, and it is possible to deposit an appropriate amount of Cr carbide, and it has excellent wear resistance. Further, the processing of the lead material can be easily performed. Further, it is possible to increase the hardness by quenching, and it is possible to further improve the wear resistance.

[0012]

EXAMPLE First, in order to see the effects of wear resistance and workability due to chemical components of C, Si, Mn, Cr, Mo, and V, leads were made using the test materials shown in Table 1 below.

The sample materials Nos. 1 to 21 of the present invention and comparative examples are
This is a martensitic stainless steel wire with a wire diameter of φ5.5 mm, which has been subjected to repeated drawing and annealing, then flat rolling, and as a finishing treatment, hardened and tempered to a hardness of HV430-450. 1. As shown in FIG. 1, a lead material 1 having a substantially rectangular cross section with a thickness dimension A = 0.29 mm and a width dimension B = 2.10 mm is prepared, and a large number of lead materials 1 as shown in FIG. A lead 3 composed of a frame 2 for fixing 1 was processed.

[0014]

[Table 1]

Next, a test for weaving a cloth was conducted by actually setting the above-mentioned various leads and the lead of the conventional example on a loom. Then, the amount of wear of the leads was measured to evaluate the wear resistance, and the workability was evaluated from the processing cost required for manufacturing various lead materials. The results are shown in Table 2 below.

[0016]

[Table 2]

By the way, the wear resistance shown in Table 2 is
It is expressed by an index when the wear amount of the conventional example of No. 22 is 100, and the larger the value, the better the wear resistance. The workability is an evaluation of the difficulty of processing,
This is an index based on the processing cost of wire drawing, rolling, etc., when the processing cost of the conventional example of test material No. 22 is set to 100. The sex is inferior. That is, in this test result, a lead material having good wear resistance and good workability is a practical and excellent lead material.

Specimens of the present invention Nos. 4, 7, 12 of Table 2
The leads made of 13, 14, and 18 have wear resistance of 180 or more and workability of 120 or less.
Compared with the lead of the conventional example using No. 22 and 23, the wear resistance shows about twice the value, but the workability shows almost the same value, making it easy to make a lead material with good wear resistance. You can see that

However, the test materials of Comparative Examples Nos. 8, 15, 1
The leads using Nos. 6, 19, and 21 showed the best wear resistance of 200 or more, and were more than twice the values of the leads of the conventional example using the test materials Nos. 22 and 23. In terms of workability, the value is 1.6 to 2 times that of the conventional product, so it is inferior in practicality.

Further, test materials Nos. 9, 10, 11, 1
Nos. 2, 13, 14, 15, and 16 are those in which one or two kinds of Mo and V are added. Especially the test material No. 1 of the present invention
2, 13 and 14 are test materials No. 7 in which Mo and V are not added
Compared with, the workability is equivalent and the wear resistance is about 10%.
It has been found to show an improvement in

[0021]

INDUSTRIAL APPLICABILITY The lead material for a loom of the present invention makes it possible to easily produce a lead material having excellent wear resistance by using steel having a specific chemical composition as a raw material, and used as a lead in a loom. At this time, it can be used for a long time, the lead replacement cycle can be extended, and the productivity of the loom can be improved.

[Brief description of drawings]

FIG. 1 is an enlarged schematic view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing a lead using the lead material for a loom of the present invention.

[Explanation of symbols]

1 Lead material 2 frames 3 leads

Claims (2)

[Claims] 1. C .: 0.6 to 0.95, Si: 1.0 by weight.
Hereinafter, a lead material for a loom comprising Mn: 1.0 or less, Cr: 12 to 18, balance Fe and inevitable impurities. 2. Mo: 0.2-3.0, V: 0.05 in% by weight.
The lead material for a loom according to claim 1, wherein one kind or two kinds of 0.3 to 0.3 are added.