某六缸曲轴连杆颈的表面裂纹分析  

Surface Crack Analysis of A Six-Cylinder Crankshaft Connecting Rod Neck

作　　者：刘岩 潘恒沛 张聪毅 李志浩 LIU Yan;PAN Hengpei;ZHANG Congyi;LI Zhihao(Luoyang Ship Material Research Institute,Luoyang 471023,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《热加工工艺》2024年第7期151-154,共4页Hot Working Technology

摘　　要：某六缸曲轴在成品探伤过程中发现第5连杆颈表面存在裂纹,经过宏观分析、微观分析、能谱微区成分分析等对裂纹进行了综合分析。结果表明:原材料的残余缩孔是产生裂纹的主要原因,残余缩孔在后续的轧制、锻造以及调质过程中扩展呈裂纹形态并延伸至表面。A six-cylinder crankshaft was found to have cracks on the surface of the fifth connecting rod neck during the flaw detection process of the finished product.The crack was comprehensively analyzed by means of macro analysis,micro analysis,energy spectrummicro area composition analysis and so on.The results show that the crack is caused by residual shrinkage holes in the raw material,which extend to the surface after the subsequent rolling,forging and quenching process.

关 键 词：曲轴 探伤 连杆颈 缩孔 淬火 

分 类 号：TG306[金属学及工艺—金属压力加工]