浅谈阀门焊接裂纹原因分析及防治方法

Analysis and Prevention Methods of Valve Welding Cracks

为了分析阀门焊接过程中出现裂纹的原因,从裂纹形成的理论机理入手,分析实际焊接生产过程中裂纹形成的原因,结合理论与现场的生产实践,判定裂纹形成原因。具体形成因素可以分为人的原因、材料的原因、设计的原因、焊接工艺的原因等。简单阐述了裂纹分析的方法和流程,通过裂纹形成机理及原因,在焊接工艺设计和焊接质量控制环节去预防裂纹的形成。对阀门焊接时,阀门焊缝的设计和分布、焊接工艺的设计、焊接阀材料的化学成分控制和焊接质量控制有着参考意义。

In order to analyze the causes of cracks in the welding process of valves,starting from the theoretical mechanism of crack formation,the causes of crack formation in the actual welding production process are analyzed.Combining theory with field production practice,the cause of crack formation is determined.The specific formation factors can be divided into human factors,material factors,design factors,welding process factors,etc.The method and process of crack analysis were briefly explained,and the formation mechanism and reasons of cracks were analyzed to prevent crack formation in the welding process design and welding quality control.When welding valves,the design and distribution of valve welds,welding process design,chemical composition control of welding valve materials,and welding quality control have reference significance.