高强度油淬回火钢丝用55SiCr弹簧钢线材的开发

doi:10.13228/j.boyuan.issn1001-0777.20220026

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Abstract The production process of 55SiCr spring steel wire rod for oil quenched and tempered steel wire was introduced. The hot-rolled spring steel coils for high-strength oil quenched and tempered steel wires were successfully trial-produced through the reasonable composition design and control, the use of low alkalinity refining slag smelting process, the optimization of high-wire heating process system and the appropriate controlled rolling and controlled cooling process. The results showed that the chemical composition, non-metallic inclusions, metallographic structure, grain size, decarburization layer and mechanical properties of 55SiCr steel for oil quenched and tempered steel wire could meet the customer's requirements. The tensile strength of steel wire rod after oil quenched and tempered could achieve 2 000 MPa grade, and the section shrinkage rate was higher than 40%. The oil quenched and tempered steel wire was cold rolled to produce the automobile suspension springs, and the fatigue life of springs could meet the customer's requirements.

Key words： 55SiCr high strength decarburization layer mechanical property grain size

Received: 24 April 2022

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	Articles by authors
	SUN Xiaoming
	GUO Xiaoxia
	LI Shaojie

Cite this article:

SUN Xiaoming,GUO Xiaoxia,LI Shaojie. Development of 55SiCr spring steel wire rod for high strength oil quenched and tempered steel wire[J]. PHYSICS EXAMINATION AND TESTING, 2023, 41(2): 1-4.

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http://www.chinamet.cn/Jweb_wlcs/EN/10.13228/j.boyuan.issn1001-0777.20220026 OR http://www.chinamet.cn/Jweb_wlcs/EN/Y2023/V41/I2/1

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