某20#钢管套筒外表面线性痕迹缺陷分析  

Analysis of linear trace defect on the outside surface of 20#steel pipe sleeve parts

作　　者：吕方 黄开华 郝永进 于雷 李跃杰 马丁 LÜ Fang;HUANG Kaihua;HAO Yongjin;YU Lei;LI Yuejie;MA Ding(Aetna Tianlong Beijing Tungsten Molybdenum Technology Co.,Ltd.,Beijing 100081,Chian;Sichuan Aerospace-Changzheng Equipment Manufacturing Co.,Ltd.,Chengdu 610100,China;China Academy of Launch Vehicle Technology,Beijing 100071,China)

机构地区：[1]安泰天龙钨钼科技有限公司,北京100081 [2]四川航天长征装备制造有限公司,四川成都610100 [3]中国运载火箭技术研究院,北京100071

出　　处：《物理测试》2025年第1期51-56,共6页Physics Examination and Testing

摘　　要：机械制造车间在进行套筒零件加工时,发现多个钢管套筒零件表面存在延纵向的线性条纹缺陷,表面质量不合格。不合格套筒零件报废处理后,对缺陷处进行破坏分析,经过金相检测、扫描电子显微镜(SEM)及能谱(EDS)分析,最终定性缺陷为钢管拔制前管坯表面有微小的翘皮缺陷,在拔制过程中随变形方向纵向拉长,最终成为沿管材纵向分布的折叠缺陷。In the machining process of sleeve parts by one machine manufacturing shop,it was found that the surface of several steel pipe sleeve parts had linear longitudinally stripe defects and the surface quality was unqualified.After scraping the unqualified sleeve parts,the defects were damaged for analysis.Through metallographic detection,scanning electron microscope(SEM)and energy dispersive spectroscopy(EDS)analysis,the causes of defects were finally found out.There were some small skin warping defects on the surface of the tube billet before drawing.These small defects were lengthened longitudinally along the deformation direction during the drawing process,and finally became the folding defects distributed longitudinally in the extension pipe.

关 键 词：套筒 表面分析 线性痕迹 折叠缺陷 金相显微镜 扫描电子显微镜(SEM) 能谱(EDS) 

分 类 号：TG115[金属学及工艺—物理冶金]