总空气过滤器封头的裂纹分析及返修措施  

Crack Analysis and Repair Measures of Total Air Filter's Head

作　　者：王占英[1] 李富强 陈龙[1] 耿明超[1] 梁建明[1] 

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]张家口市特种设备监督检验所,河北张家口075000

出　　处：《热加工工艺》2017年第19期259-261,共3页Hot Working Technology

基　　金：河北建筑工程学院科研重点基金项目(Z-201304);河北省高等学校科学技术研究重点基金项目(ZD20131093)

摘　　要：某工程用总空气过滤器封头在焊后出现裂纹。在判断裂纹的类型基础上,分析了总空气过滤器的制造过程。结果显示,封头在旋压成形时发生冷作硬化,材料的塑性、韧性降低是裂纹产生的主要原因。制定了工艺措施,并成功实施了封头裂纹的返修。The head of a total air filter for engineering qppeared cracking after welding. Based on the judgment of the crack type,the manufacturing process of the total air filter was analyzed. The results show that in the spinning forming, the seal head has cold hardening, the plasticity and toughness of the material is reduced, which is the main cause of crack. Technological measures were made, and the head＇s crack repair was implemented successfully.

关 键 词：压力容器 封头 冷裂纹 冷作硬化 

分 类 号：TG441.7[金属学及工艺—焊接] TG441.8