埋弧堆焊低合金钢熔敷金属组织和性能研究

摘要

CAP1000 reactor pressure vessel tube socket is made of low alloy steel by submerged arc surfacing welding, in order to ensure the isotropic of microstructure and property for surfacing structure, it used the same material and welding process with CAP1000 products pressure vessel tube socket to simulate welding, and to perform tensile and impact test from three directions, including perpendicular to welding direction, parallel to welding direction, and the welding structure height direction. Test results showed the pressure vessel tube socket made by surfacing welding is with good organization performance, good welding performance, found no weld defects;the tensile and impact properties from three directions are equivalent.%CAP1000机组反应堆压力容器堆测接管管座采用低合金钢埋弧堆焊焊接成型。为了保证堆焊结构的组织和性能的各向同性，使用与CAP1000产品堆测接管管座完全相同的材料以及焊接工艺进行焊接模拟，并从堆焊结构的三个方向，即垂直于焊接方向、平行于焊接方向、堆焊结构的高度方向分别进行拉伸和冲击试验。试验结果表明，采用堆焊方法制作的堆测接管管座具有良好的组织性能，焊接工艺性能优良，未发现焊接缺陷；三个方向的拉伸性能和冲击性能基本相当。