摘要
针对小口径锻钢阀体密封面堆焊时常出现气孔、裂纹、咬边等缺陷的现象,着重从电流、电压和堆焊面高度这3个方面,分析其改变对堆焊面品质的影响,通过表面观察、硬度检查和金相试验进行分析,找出缺陷、硬度和组织成分随参数变化的规律,最终予以优化,找到了最适合堆焊的工艺参数。
In view of the defect phenomenon on sealing surface of small-bore forged steel valve while welding often appears,such as porosity,crack,undercut,etc.,analyzing the influence on welding quality by their changes,mainly from the 3 aspects of current,voltage and welding surface height.Then finding out the defect,hardness and the rule of composition＇s changing with the parameter,by analyzing through surface observation,hardness inspection and metallographic test.At last getting the most suitable welding parameters after optimization.
出处
《装备制造技术》
2012年第8期12-13,20,共3页
Equipment Manufacturing Technology
关键词
阀门
堆焊
缺陷
渗透检验
硬度
金相
valve
welding
defect
penetrant inspection
hHardness
metallographic
