Abstract：Laser welding on 20Mn2 pipes has been conducted in detail Microstructure and property of welded joint are analyzed by optical metallurgical microscope, scanning electron microscope, micro- hardness tester The microstructure and property of laser welded joints on 20Mn2 pipes with different laser powers, welding speeds and defocus amounts are studied It shows that the maximum weld depth was got when the laser power is 2 400 W, the welding speed is 73 mm/s and the defocus amount is 0 mm When the laser power is 1 200 W, the welding speed is 73 mm/s and the defocus amount is 0 mm, the maximum value of micro- hardness is 3824HV10 The main microstructure of weld is lath martensite The main microstructure of heat affected zone is ferrite, pearlite ,bainite and lath martensite
收稿日期: 2015-11-16
出版日期: 2016-04-26
基金资助:轧辊的激光—渗氮复合处理及组织超细化机理研究
通讯作者:
何力佳
E-mail: helijia2004@163.com
引用本文:
李彦良，何力佳. 20Mn2管材光纤激光焊接焊缝接头组织与性能[J]. , 2016, 23(2): 35-39.
LI Yan- liang，HE Li- jia. The microstructure and mechanical property of 20Mn2 pipe by fiber laser welding. , 2016, 23(2): 35-39.
2016, Vol. 23 
