振动时效消应技术在清河电站岔管安装中的应用

Application of vibration aging elimination technique in Qinghe Power Plant branch pipes installation

清河电站钢岔管安装过程中,采用振动时效消应技术消除焊接残余应力。本文介绍了振动时效消应处理的技术方案,定性和定量分析了振动时效处理结果,明确了振动时效消应技术不仅可使应力平均值降低大于30%,还可使高应力区消除50%以上的残余应力且残余应力低于材料屈服强度的50%,高于相关规范标准要求。

In the steel branch pipes installation process of Qinghe Power Plant, vibration aging elimination technique is adopted for eliminating welding residual stress. In the paper, technical plan of vibration aging elimination treatment is introduced. Vibration aging treatment results are qualitatively and quantitatively analyzed. It is clear that vibration aging elimination technique not only can lower the average value of stress by more than 30%, but also can eliminate more than 50% residual stress in the high stress area, and the residual stress can be lower than 50% of the material yield strength, which is higher than the requirements in related specification and standards.