电焊机2017，Vol.47Issue(9)：24-27,4.DOI:10.7512/j.issn.1001-2303.2017.09.05
35CrMo调质钢超窄间隙MAG焊接头组织分析
Microstructure of tempering 35CrMo welded joint by UNG-MAG welding process
摘要
Abstract
In this paper,introduced the equipment and the principle parameters in Ultra-Narrow Gap MAG Welding process applied for tempering 35CrMo circumferential welding,and then analyzed the microstructures and the mechanical performance via metallographic observation and hardness measurement of the welded joint.Finally,the results of tensile test on welds indicated that fracture occurred in welds which had minimum hardness,however corresponding strength was much higher than the tensile strength of the welding wire.It can be obtained that the application of ultra-narrow gap MAG welding lower heat input welding process,is conducive to the formation of fine grain of the weld and heat affected zone organization,through fine grain strengthening significantly improve the tensile strength of deposited metal,which has important reference value for the design and application of the technology of low alloy high-strength tempering steel.关键词
超窄间隙焊接/MAG/MIG焊/35CrMo/细晶粒Key words
UNG welding/MAG welding/35CrMo/fine grain分类
矿业与冶金引用本文复制引用
郭嘉琳,万文峰,张富巨,张国栋..35CrMo调质钢超窄间隙MAG焊接头组织分析[J].电焊机,2017,47(9):24-27,4.基金项目
国家自然科学基金资助项目(51305308) （51305308）
