焊接工艺参数对3mm厚SS400钢焊接接头组织的影响
Effect of Welding Process Parameters on Microstructure of Welded Joint of SS400 Steel with 3 mm Thickness
王英利 1王凤仙1
作者信息
- 1. 呼伦贝尔学院,内蒙古呼伦贝尔021008
- 折叠
摘要
采用不同焊材和工艺参数对3mm厚SS400钢板进行手工电弧焊,并对接头显微组织进行了观察和分析.结果表明,焊材对焊缝组织影响较大,对热影响区组织影响较小.当选用J422酸性焊条时,焊缝组织为块状铁素体+针状铁素体+少量珠光体.选用J506碱性焊条时,焊缝组织为大量针状铁素体+少量珠光体.焊接热输入对焊缝组织影响较小,对焊接热影响区组织影响较大.当热输入由3.6 kJ/cm增大到15.6 kJ/cm时,热影响区组织晶粒也逐步变大,魏氏组织不断增加,索氏体和粒状贝氏体不断减少.在实际生产中,考虑焊接效率和焊接质量时,采用J506碱性焊条和热输入为10.5 kJ/cm为最优焊接工艺.
Abstract
In order to get the welding process parameters on microstructure in welded joint of 3 mm thick SS400 steel plate,welding tests were carried out by using different electrodes and welding process parameters on SS400 steel with the thickness of 3 mm.The microstructure of the welded joint was observed.The results show that the effect of electrodes on the microstructure of the weld is greater,and the impact on the microstructure of heat affected zone is less.Elected with J422 acid electrode,the weld microstructure is massive ferrite,acicular ferrite and pearlite.Elected with J506 basic electrode,the weld microstructure is a large aeicular ferrite and pearlite.The effect of welding heat input on the weld microstructure is less,but the effect of welding heat input on the microstructure of heat affected zone is greater.When the heat input increases from the 3.6 kJ/cm-1 to 15.6 kJ/cm-1,HAZ grain also gradually becomes larger,the widmanstatten increasing sorbite and granular bainite is declining.In actual production,considering the efficiency and quality of welding,J506 alkaline electrode and the heat input 10.5kJ/cm-1 are optimal welding parameters.
关键词
超细晶粒钢/手工电弧焊/焊材/焊接工艺/显微组织Key words
ultra-fine grain steel/manual electric arc welding/electrodes/welding process/microstructure引用本文复制引用
出版年
2014
NETL
NSTL
维普
万方数据