机械振动焊接是在振动调整残余应力技术基础上发展起来的一项焊接新技术。这种焊接新技术 ,不仅能提高焊接质量 ,改善焊接接头金相组织 ,提高接头金属的力学性能 ,而且能省去焊后调整残余应力的工序 ,从而缩短生产周期 ,降低生产成本 ,并将给焊接生产领域带来巨大的经济效益。试验选用压力容器常用钢 1 6MnR作为试验材料 ,采用机械振动焊接钢板与常规埋弧自动焊接钢板对比实验方法 ,通过残余应力测试和测试结果分析研究了机械振动焊接对残余应力的影响。结果表明 ,机械振动焊接可降低焊接残余应力 ;当频率、振幅 (激振力 )选取合适时 ,其降低效果更显著。而机械振动焊接降低残余应力的机理主要是由于机械振动使焊缝及周围的温度梯度减小和振动使晶粒细化、组织分布均匀所致 Mechanical vibration welding is a new welding technology developed on the basis of the vibration-adjusted residual stress technology. This new welding technology can not only improve the welding quality, improve the microstructure of welded joint and improve the mechanical properties of the joint metal, but also save the process of adjusting the residual stress after welding to shorten the production cycle and reduce the production cost, Welding production brings huge economic benefits. In the experiment, 16MnR, a commonly used steel for pressure vessel, was selected as the test material. The comparison between the mechanical vibration welded steel plate and conventional submerged arc welded steel plate was carried out. The residual stress and its influence on residual stress were analyzed by residual stress test and test results. The results show that mechanical vibration welding can reduce the welding residual stress. When the frequency and amplitude (exciting force) are selected properly, the reduction effect is more remarkable. The mechanism of mechanical vibration welding to reduce residual stress is mainly due to mechanical vibration so that the temperature gradient around the weld and reduce the vibration and grain refinement, resulting in uniform tissue distribution