Stainless steel for cutter and manufacture method thereof

A technology of stainless steel and knives, which is applied in the field of stainless steel manufacturing, can solve the problems of easy chipping of knives, high production cost, complicated process, etc., and achieve the effects of easy control of product quality, simple production operation, and excellent process performance

Inactive Publication Date: 2010-02-10
WUHAN IRON & STEEL (GROUP) CORP
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Problems solved by technology

[0004] Among the above technologies, the former literature records that the copper alloy material is based on copper, the production cost is high, and the thermal processing performance is poor. It needs to be manufactured by powder metallurgy method, which has complicated process and low production efficiency.
The stainless steel materials introduced in the latter literature are added with a mass fraction of more than 0.7% C in order to increase the hardness, but practice has proved that adding more than 0.7% C content in stainless steel will become a

Method used

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Example Embodiment

[0024] The stainless steel for cutting tools and the manufacturing method thereof of the present invention will be further described in detail below in conjunction with specific embodiments:

[0025] The chemical compositions of the 12 specific examples of the stainless steel for cutting tools of the present invention are listed in Table 1 in sequence. The manufacturing methods of these 12 kinds of stainless steel for knives are as follows:

[0026] 1) Induction furnace steelmaking: use soft iron as the main raw material for batching, use waste carbon electrodes as recarburizers, and slag material with CaO as the main material. The refining time is controlled at 15-30min, and the tapping temperature is controlled at 1530-1580℃. , Add titanium wire 5-7min before tapping;

[0027] 2) Casting of steel ingot mold: After the steel is finished, it will be calmed for 3-8 minutes and start pouring, with a trickle bottom. After the molten steel is filled with the bottom of the mold, increase...

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Abstract

The invention discloses stainless steel for a cutter and a manufacture method thereof. The steel comprises the following chemical components in percentage by weight: C:0.20-0.65, Si:0.10-0.50, Mn:0.10-0.60, P:0.010-0.030, S: 0.005-0.015, Cr: 14-17, Nb: 0.01-0.30, Ti: 0.005-0.025, W: 0.50-1.50, Al: 0.005-0.30 and the balance of Fe and inevitable impurities and also satisfies that the valent weightof Cr is 14.14-17.41, and the valent weight of Ni is 6.30-19.63. The manufacture method comprises the following steps: making steel in an induction furnace, casting ingot moulds, rolling in a reversing mill, cooling in a pile, thermally treating, and the like. A cutter made of the steel does not disintegrate, keeps durable sharpness and is suitable for manufacturing a kitchen cutter, scissors anda surgical knife. The manufacture method has excellent performance, simple production operation, easily controlled product quality and low cost.

Description

Technical field [0001] The invention belongs to the field of stainless steel manufacturing, and specifically relates to a stainless steel for cutting tools and a manufacturing method thereof. Background technique [0002] Stainless steel is not rusty, durable, and beautiful. It is widely used by knife manufacturers to make kitchen knives, scissors and surgical knives. However, the commonly used stainless steel materials have low hardness, unsatisfactory wear resistance, poor blade sharpness and short retention time. With the development of economy and the improvement of people's living standards, people have put forward higher requirements for the performance of cutting tools. Therefore, many people are also actively developing cutting tools. [0003] Before the present invention, the Chinese invention patent specification with the patent number ZL 01126989.8 discloses a copper alloy material suitable for cutting tools, which is composed of Cu, Zn, and Sn, and the composition acco...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C38/28C21C5/52C21D1/18C21D1/26C21D8/02B21B37/74
Inventor 范植金刘振清刘吉斌罗国华朱玉秀陈颜堂严翔朱丛茂
Owner WUHAN IRON & STEEL (GROUP) CORP
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