Steel plate for fiber machine parts and manufacturing method thereof

Abstract

The present invention provides a steel sheet for fiber machine parts that can be produced at low cost and has good abrasion resistance and toughness. The steel sheet for fiber machine parts contains in mass %: 0.60% or more and 1.25% or less of C, 0.50% or less of Si, 0.30% or more and 1.20% or less of Mn, 0.03% or less of P, 0.03% or less of S, 0.30% Cr is 1.50% or more, Nb is 0.10% or more and 0.50% or less, and the remainder is composed of Fe and unavoidable impurities. In addition, the Nb-containing carbides with a particle size of 0.5 μm or more are 3000 pieces / mm 2 Above 9000 / mm 2 The following densities exist in the matrix. According to this steel sheet for fiber machine parts, the wear resistance improvement effect of the Nb-containing carbide can be ensured, and the deterioration of the toughness due to excessive production of the Nb-containing carbide can be prevented, so that the wear resistance and toughness are good.

Description

technical field [0001] The present invention relates to a steel plate for fiber machine parts excellent in wear resistance and toughness, and a method for producing the same. Background technique [0002] Fiber mechanical parts such as knitting needles, needle plates, sinkers, selectors, and jacks used in knitting machines require wear resistance, so quenched / tempered materials of high carbon steel are generally used. These fiber mechanical parts due to the Al contained in the yarn 2 o 3 , SiO 2 Abrasive wear due to inclusions. [0003] In addition, in recent years, due to the development of densely woven clothing, there is a tendency for fiber machinery parts to become thinner. When fiber machinery parts become thinner due to wear, the weaving position will shift. Therefore, for steel plates for fiber machinery parts, It is further required to improve the wear resistance. [0004] On the other hand, when the knitting machine is running at high speed, various parts may ...

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Problems solved by technology

[0004] On the other hand, when the knitting machine is running at high speed, due to the impact of the reciprocating movement of the textile machinery parts while sliding, various parts may be broken.

[0005] For example, when the knitting needle breaks, the part where the knitting needle breaks will damage the knitted fabric, causing problems in the commodity value of the fabric.

[0006] In addition, when a malfunction occurs in the selector as a member for selecting the yarn, the selector collides with the needle plate and the needle plate is broken.

The needle plate is fixed to the main body of the knitting machine while being held by several threads, so the broken needle plate cannot be easily replaced

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