?6.5 mm 55SiCr淬回火弹簧钢丝滞后断裂研究

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英文篇名：Research of diameter 6.5 mm 55SiCr quenched and tempered spring steel wire delayed fracture 作者：邢献强 ; 菅军伟 ; 董峰 英文作者：Xing Xianqiang;Jian Junwei;Dong Feng;Sinosteel Zhengzhou Research Institute of Steel Wire Products Co.,Ltd.;Guangzhou ORSA Wire Science & Technology Co.,Ltd.; 关键词：淬回火弹簧钢丝 ; 氢致滞后断裂 ; 非金属夹杂物 ; 晶粒度 英文关键词：quenched and tempered spring steel wire;;hydrogen-induced delayed fracture;;non-metallic inclusion;;grain size 中文刊名：JSZP 英文刊名：Metal Products 机构：中钢集团郑州金属制品研究院有限公司;广州市奥赛钢线科技有限公司; 出版日期：2019-02-25 出版单位：金属制品 年：2019 期：v.45;No.266 语种：中文; 页：JSZP201901009 页数：6 CN：01 ISSN：41-1145/TG 分类号：36-41

摘要

?6.5 mm 55SiCr淬回火弹簧钢丝热处理后探伤涂油前发生滞后断裂。对钢丝断裂样品化学成分、力学性能、断口形貌、晶粒度、表面质量和显微组织进行研究。钢丝断裂样品化学成分、力学性能满足标准要求,断口宏观形貌起伏较大,钢丝实际晶粒度为7.7级,淬回火弹簧钢丝显微组织为回火屈氏体加极少量小球状碳化物。结果表明,?6.5 mm 55SiCr淬回火弹簧钢丝滞后断裂主要是由于钢丝次表层存在较大尺寸非金属夹杂物引起的氢致滞后断裂。
        Diameter 6.5 mm 55 SiCr quenched and tempered spring steel wire occurred delayed fracture after heat treatment and before flaw detection oil coating. To research the chemical composition, mechanical properties, fracture pattern, grain size, surface quality and microstructure of steel wire fracture samples. The chemical composition, mechanical properties meet requirements of standard, fracture macro pattern fluctuate obviously, steel wire actual grain size grade is 7.7, microstructure of quenched and tempered spring steel wire is tempered troostite with very small amount of spheroidal carbide. Results show that diameter 6.5 mm 55 SiCr quenched and tempered spring steel wire delayed fracture is hydrogen-induced delayed fracture mainly caused by large non-metallic inclusion in subsurface layer of steel wire.

引文

[1]邢献强.国产淬回火弹簧钢丝缺陷分析及改善措施[J].金属制品,1996,22(增刊):22-28.
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