3J53弹簧表面裂纹缺陷原因分析  

Analysis of Surface Crack of A 3J53 Spring

作　　者：李丽[1] 谢国君[2] 徐秋发 宋维民 刘继梁 LI Li;XIE Guojun;XU Qiufa;SONG Weimin;LIU Jiliang(China Academy of Launch Vehicle Technology, Beijing 100076;Aerospace Research Institude of Materials ＆ Processing Technology, Beijing 100076)

机构地区：[1]中国运载火箭技术研究院,北京100076 [2]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2018年第1期81-84,共4页Aerospace Materials & Technology

摘　　要：3J53钢丝在车间缠绕成弹簧并经热处理后发现其表面存在线性缺陷。用扫描电镜对钢丝线性缺陷的形貌进行了分析,对线性缺陷区域进行了能谱分析,并利用金相显微镜观察了线性缺陷的中心部位及其周围区域的金相组织。结果表明:钢丝表面的线性缺陷呈锯齿状,沿钢丝轴向方向,为裂纹型折叠缺陷。折叠缺陷是钢丝在生产过程中形成,在绕簧和热处理过程中,裂纹型折叠缺陷发生扩展和延伸,最终形成线性缺陷。The 3 J53 steel wire was coiled into a spring and linear defect on the surface appeared after heat treatment. In this paper,the morphology of the linear defect of steel wire was analyzed by scanning electron microscopy.The linear defect was also analyzed by energy spectrum analysis,and the microstructure of the linear defect was observed by metallographic microscope. The results showed that the linear defect on the surface of steel wire was serrated and crack-type folding along the axial direction of steel wire. Folding defect was formed during the process of steel wire production,which was extended and stretched during the process of coiling and heat treatment,and eventually linear defect was formed.

关 键 词：3J53 钢丝 折叠 

分 类 号：TG335[金属学及工艺—金属压力加工]