摘要
针对某大型船用传动轴工作轴颈表面产生腐蚀坑的问题,采用高能微脉冲表面强化修复技术对试验样轴进行修复。通过拉伸试验筛选了焊丝,采用光学显微镜和显微硬度计分析了修复层的显微组织和硬度,研究了扭转条件下修复层与基体的结合强度。结果表明:Ni-818焊丝修复层与基体的结合强度高,抗拉强度为557MPa;修复层显微组织均匀、致密,硬度差异小;当扭矩为200N.m,且表面最大剪应力为438MPa时,修复层和基体之间结合良好。由此得出结论:采用高能微脉冲表面强化修复技术,使用Ni-818焊丝可实现对45CrNiMoVA传动轴的表面强化修复。
The erosion pits on the surface of the transmission shaft in the large size marine are repaired by using high energy micro-pulse surface hardening technology. Welding wires are selected through tensile test. The microstructure and hardness of repaired shaft are studied by optical microscope and microhardness tester, respectively. The results indicate that the tensile strength is 557 MPa and bond strength of repaired investigated shaft using Ni-818 welding wires are high. The microstructure of the repaired l...
出处
《装甲兵工程学院学报》
2010年第1期74-77,共4页
Journal of Academy of Armored Force Engineering
基金
军队科研计划项目
关键词
高能微脉冲
表面强化
表面修复
抗拉强度
high energy micro-pulse
surface hardening
surface repair
tensile strength
