摘要
T91钢淬硬倾向和裂纹敏感性较大,常出现弧坑裂纹,分析出现弧坑裂纹的原因主要有:T91钢合金元素含量高,容易淬硬且焊接性较差;收弧时速度较快且未将弧坑填满;焊接过程中未采取合理的防风措施等。针对这些因素采取相应的措施:严格按照规程执行焊接工艺及热处理制度;选用S、P等易偏析元素含量低和高w(Mn)/w(S)的焊条;采用合理的接头形式,控制对口间隙;加强对焊接收弧时的工艺控制;注意打磨接头收弧处弧坑;严格控制焊接作业环境。
T91 steel hardened tendency and crack sensitivity is larger, often appear crater crack,causes of crater cracks mainly are： T91 steel alloy element content was high,easy to harden and poor welding;arc is faster and does not fill crater;welding process does not take reasonable measures such as wind.Measures are taken： in strict accordance with the rules of implementation of the welding process and heat treat,nent system;selection of S,P and other easy segregation element content is low and high w（Mn）/w（S） ratio of the electrode; adopt joint form reasonable,control the gap;to strengthen the control of the process of welding arc when attention Polish joint;crater; strict control of welding work environment.
出处
《电焊机》
北大核心
2014年第10期174-176,共3页
Electric Welding Machine
关键词
T91钢材
弧坑裂纹
焊接工艺
T91 steel materials
crater crack
welding procedure
