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High-performance spring steel

A high-performance, spring steel technology, applied in the field of alloy steel, can solve the problems of brittle fracture of spring steel, and achieve the effect of high cost performance, long life and good elasticity

Inactive Publication Date: 2015-05-06
KUNSHAN SHUOCI METAL MATERIAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current spring steel is prone to brittle fracture under extremely harsh conditions, and a larger lifting degree is needed to meet the needs of modern industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A high-performance spring steel, adding various elements by weight, its composition is: C: 1.9 parts, Cu: 5 parts, Si: 4 parts, Cr: 0.8 parts, Nb: 0.2 parts, V: 0.2 parts, Al : 0.5 parts, Zn: 2 parts, Ni: 0.5 parts, Ni: 0.5 parts, and the rest are Fe and irremovable impurities. The high-performance spring steel material is heated, formed, quenched with waste heat, tempered at medium temperature, and finally the final shape of the product is carried out. The forming and tempering temperature at medium temperature are controlled between 400°C.

Embodiment 2

[0013] A high-performance spring steel, adding various elements by weight, its composition is: C: 2.2 parts, Cu: 6 parts, Si: 8 parts, Cr: 1.2 parts, Nb: 0.5 parts, V: 0.3 parts, Al : 0.8 parts, Zn: 5 parts, Ni: 0.9 parts, Ni: 0.9 parts, and the rest are Fe and irremovable impurities. The high-performance spring steel plate material is heated, formed, quenched with waste heat, tempered at medium temperature, and finally the final shape of the product is carried out. The forming and tempering temperature at medium temperature are controlled between 500°C.

Embodiment 3

[0015] A high-performance spring steel, adding various elements by weight, its composition is: C: 2.1 parts, Cu: 5.5 parts, Si: 6 parts, Cr: 1.1 parts, Nb: 0.4 parts, V: 0.22 parts, Al : 0.6 parts, Zn: 4 parts, Ni: 0.7 parts, Ni: 0.8 parts, and the rest are Fe and unremovable impurities. The high-performance spring steel material is heated, formed, quenched with waste heat, tempered at medium temperature, and finally the final shape of the product is carried out. The forming and tempering temperature at medium temperature are controlled between 460°C.

[0016] Good elasticity, suitable for normal work under load environment, high yield strength for manufacturing spring material, and long life, and will not appear brittle fracture under extremely harsh conditions. Moreover, it is cost-effective and suitable for large-scale promotion and use in the field of industrial manufacturing.

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Abstract

The invention relates to high-performance spring steel which comprises the following elements in parts by weight: 1.9-2.2 parts of C, 5-6 parts of Cu, 4-8 parts of Si, 0.8-1.2 part of Cr, 0.2-0.5 part of Nb, 0.2-0.3 part of V, 0.5-0.8 part of Al, 2-5 parts of Zn and the balance of Fe and unremovable impurities. The high-performance spring steel material provided by the invention is obtained by the following steps: heating; molding; quenching by waste heat; tempering at medium-temperature; and finally molding a final shape of a product. The high-performance spring steel provided by the invention has the beneficial effects that the high-performance spring steel is good in elasticity, high in toughness and suitable for normal work under a loading environment; the high-performance spring steel has relatively high yield strength for manufacturing a spring material, is relatively long in service life, and is free of brittle failure under an extremely severe condition; moreover, the high-performance spring steel is high in cost performance and suitable for being popularized and used in a large area in the industrial manufacturing field.

Description

technical field [0001] The invention relates to an alloy steel, especially a high-performance spring steel. Background technique [0002] Spring steel should have excellent comprehensive properties, such as mechanical properties (especially elastic limit, strength limit, yield ratio), anti-elasticity reduction performance (that is, anti-elasticity reduction performance, also known as anti-relaxation performance), fatigue performance, hardenability , Physical and chemical properties (heat resistance, low temperature resistance, oxidation resistance, corrosion resistance, etc.). In order to meet the above performance requirements, spring steel has excellent metallurgical quality (high purity and uniformity), good surface quality (strict control of surface defects and decarburization), precise shape and size. Spring steel belongs to the steel for mechanical structure; according to the quality grade, it belongs to special quality steel, that is, the steel that needs to be stric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/36C22C38/56C21D1/18
Inventor 赵大全李桂强王永
Owner KUNSHAN SHUOCI METAL MATERIAL PROD
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