核电用316奥氏体不锈钢钢丝扭转性能分析

doi:10.13228/j.boyuan.issn1006-9356.20220152

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Abstract Aiming at the problems of non-uniform unidirectional torsional properties and abnormal fracture in the development of austenitic stainless steel wire for nuclear power, the metallographic structure, unidirectional torsional fracture and surface morphology near the fracture were studied by means of optical microscope (OM) and scanning electron microscope (SEM). It is found that the main reasons for non-uniform of unidirectional torsional properties and abnormal fracture are the poor surface quality of steel wire and overburning at the welded joint of steel bar. By changing the drawing die material from tungsten steel to polycrystalline and the lubricant from lubricating powder to water-soluble grease, the surface quality of steel wire is improved. By reducing the heat input during welding at the welded joint properly, the problem of abnormal fracture in unidirectional torsion test is solved. After improvement, the unidirectional torsion turns tends to be uniform, and the maximum number of torsion turns can be up to 169, which is much higher than the technical requirements.

Key words： nuclear power austenitic stainless steel steel wire torsional property abnormal fracture

Received: 18 February 2022

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	Articles by authors
	YANG Chen
	GAO Ya-long
	ZHOU Ji-hua
	SHEN Hong-ying
	SHI Hong-ming
	ZHANG Jie-wei

Cite this article:

YANG Chen,GAO Ya-long,ZHOU Ji-hua等. Analysis on torsional properties of 316 austenitic stainless steel wire for nuclear power[J]. China Metallurgy, 2022, 32(6): 123-128.

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http://www.zgyj.ac.cn/EN/10.13228/j.boyuan.issn1006-9356.20220152 OR http://www.zgyj.ac.cn/EN/Y2022/V32/I6/123

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