汽车悬架系统用55SiCr弹簧钢丝带状组织

doi:10.13228/j.boyuan.issn0449-749x.20190303

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Abstract In order to study the effect of central segregation on the microstructure and properties of spring steel,the elemental segregation behavior,banded structure and mechanical properties of 55SiCr spring steel were studied by means of metallographic microscope,scanning electron microscope and electron probe. The results show that the content of Mn,Cr and Si in the banded structure is more than 1 times higher than that in the matrix. The segregation of alloying elements causes the banded structure. Cracks in the tensile specimens of spring steel originate from the segregated banded structure and eventually fracture through the growth of the banded structure. The banded segregation is an important factor affecting the mechanical properties of high strength spring steel.

Key words： high strength spring steel alloy element segregation band structure mechanical property crack propagation

Received: 05 July 2019

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	Articles by authors
	XING Xian-qiang
	CAO Wen-quan
	WANG Cun-yu

Cite this article:

XING Xian-qiang,CAO Wen-quan,WANG Cun-yu. Bond structure of 55SiCr steel used for coil springs of automotive suspension system[J]. Iron and Steel, 2020, 55(3): 68-73.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190303 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I3/68

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