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A kind of free cutting stainless steel and its application

A stainless steel and easy-cutting technology, which is applied in the field of free-cutting stainless steel, can solve the problems of non-environmental protection of the alloy and no benefit to human health, and achieve the effect of not reducing the tensile performance, meeting safety and environmental protection requirements, and not being easily deformed

Active Publication Date: 2021-02-19
启东市荣盛铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing free-cutting steels improve the overall free-cutting performance through inclusions caused by lead elements, but such alloys containing lead elements are not environmentally friendly and are not good for human health, so people are also looking forward to developing New alternative products reduce the use of lead elements to ensure the environmental protection and health of materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, a kind of free cutting stainless steel, is made up of following composition:

[0026] C: 0.03wt%, Si: 0.9wt%, Mn 3wt%, Cr: 25wt%, P: 0.09wt%, S: 0.3wt%, Mo: 2.6wt%, V: 0.60wt%, B: 0.03wt% , Se: 0.3wt%, Ce: 0.3wt%, Bi: 0.15wt%, Te: 0.03wt%, the balance is Fe and unavoidable impurities; the round steel after melting and rolling is at a temperature of 860°C, Keep warm for 10 hours, and the cooling method is air cooling.

Embodiment 2

[0027] Embodiment 2, a kind of free cutting stainless steel, is made up of following composition:

[0028] C: 0.01wt%, Si: 0.6wt%, Mn: 2.5wt%, Cr: 23wt%, P: 0.06wt%, S: 0.01wt%, Mo: 1.8wt%, V: 0.40wt%, B: 0.001 wt%, Se: 0.1wt%, Ce: 0.1wt%, Bi: 0.05wt%, Te: 0.01wt%, the balance is Fe and unavoidable impurities; the round steel after smelting and rolling is heated at a temperature of 840°C Next, keep warm for 8 hours, and the cooling method is air cooling.

Embodiment 3

[0029] Embodiment 3, a kind of free cutting stainless steel, is made up of following composition:

[0030] C: 0.02wt%, Si: 0.8wt%, Mn: 2.7wt%, Cr: 24wt%, P: 0.07wt%, S: 0.25wt%, Mo: 2.2wt%, V: 0.50wt%, B: 0.002 wt%, Se: 0.2wt%, Ce: 0.2wt%, Bi: 0.1wt%, Te: 0.02wt%, and the balance is Fe and unavoidable impurities. Next, keep warm for 9 hours, and the cooling method is air cooling.

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PUM

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Abstract

The invention discloses a free-cutting stainless steel, which is characterized in that it consists of the following components: C: 0.01-0.03wt%, Si: 0.6-0.9wt%, Mn: 2.5-3wt%, Cr: 23-25wt%, P : 0.06~0.09wt%, S: 0.01~0.3wt%, Mo: 1.8~2.6wt%, V: 0.40~0.60wt%, B: 0.001‑0.03wt%, Se: 0.1~0.3wt%, Ce: 0.1 ~0.3wt%, Bi: 0.05‑0.15%, Te: 0.01~0.03wt%, the balance is Fe and unavoidable impurities, it has lead-free elements, and the performance is not reduced, but the technical problem of removing Pb elements, In the end, stainless steel meets the attributes of environmental protection, safety and health.

Description

technical field [0001] The invention relates to the field of stainless steel preparation, more specifically, it relates to a free-cutting stainless steel and its application. Background technique [0002] The development of foreign free-cutting steel was earlier and rapid. In 1920, the United States officially produced sulfur-based free-cutting steel for the first time. Later, Britain, the Soviet Union, Japan, France and other countries also produced and used it one after another. After the steel was patented and Ledloy free-cutting steel was produced, Japan and Germany began to produce it one after another. At the same time, selenium and free-cutting steel began to be applied, mainly compounded with sulfur and lead to add to the steel. The cutting performance is very good, and it can be compared with free-cutting steel. Brass is comparable, but because of its high price, it is mainly used in free-cutting stainless steel. In 1964, the Federal Republic of Germany first succes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/22C22C38/24C22C38/32C22C38/38C22C38/60C21D8/06C21D1/18
CPCC21D1/18C21D8/065C22C38/002C22C38/005C22C38/02C22C38/22C22C38/24C22C38/32C22C38/38C22C38/60
Inventor 周振新
Owner 启东市荣盛铜业有限公司
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