高阻尼锰铜合金/40CrNiMoA异种材料焊接工艺研究

介绍了高阻尼锰铜合金GZ50与齿轮钢40CrNiMoA异种材料TIG焊接工艺,并对焊接接头拉伸、冲击、冷弯、疲劳性能和接头金相组织、冲击断口、显微硬度以及接头耐海洋大气腐蚀性能等进行了分析.结果表明,采用合理的焊接工艺参数和焊后消应力处理,保证了焊接接头各项性能指标满足要求,焊缝金相组织均匀,断口为韧性断裂;GZ50合金侧和40CrNiMoA钢侧的热影响区宽度基本相同,GZ50合金侧的热影响区与基体组织由于热作用的不同,各相形态与比例不同;焊接接头在海洋大气环境中,12个月的腐蚀速率比6个月的腐蚀速率约低1/2.

Research on Welding Technology for Heterogeneous Material of High Damping Mangnese-Corpper Alloy/40CrNiMoA

TIG welding technology for heterogeneous materials of high damping mangnese-corpper alloy and 40 CrNiMoA gear steel was introduced, and analysis on properties of tension, impact, cold bending, fatigue, metallurgical structure, impact fracture appearance, micro-hardness and marine atmospheric corrosion resistance was performed. The results manifested that all properties of the welded joints could satisfy requirements after adopting suitable welding parameters and stress relief treatment following the welding;Metallurgical structure of the welding line was homogeneous, and the fracture appearance was ductile;The widths of heat-affected zones of GZ50 alloy side and 40 CrNiMoA steel side were basically the same;The phrase forms and their proportions in heat-affected zone of GZ50 alloy side and the base material were different due to different heat action;In marine atmosphere, corrosion rate of 12-month was approximately 50% lower than that of 6-month.