不锈钢液压油管开裂失效分析  

Cracking Analysis of Stainless Steel Hydraulic Tubing

作　　者：钟伟 方星光 周岩 刘欣 ZHONG Wei;FANG Xingguang;ZHOU Yan;LIU Xin(First Tractor Company Limited,Luoyang 471004,China)

机构地区：[1]第一拖拉机股份有限公司,河南洛阳471003

出　　处：《拖拉机与农用运输车》2021年第3期67-70,共4页Tractor & Farm Transporter

摘　　要：某不锈钢液压油管在试压过程中发生开裂,采用宏观观察、显微观察、磁粉探伤、化学成分分析、电镜观察等手段对不锈钢液压油管的开裂原因进行了分析。结果表明,该不锈钢液压油管在使用过程中受到的振动应力超过焊缝处材料疲劳强度,继而产生疲劳裂纹导致疲劳开裂。The cracking of stainless steel hydraulic tubing occurred in the process of pressure testing.The cracking cause of stainless steel hydraulic tubing was analyzed by means of macroscopic observation,microstructure observation,magnetic particle inspection,chemical composition analysis,scanning electron microscope and so on.The results show that the vibration stress of the stainless steel hydraulic tubing in the use exceeds the fatigue strength of the material at the weld,and then leads to fatigue crack.

关 键 词：不锈钢液压油管 振动应力 疲劳强度 

分 类 号：TG157[金属学及工艺—热处理]