由于A335GrP91钢属马氏体钢,具有一定的冷裂倾向和脆化倾向,因而对焊接工艺和热处理工艺有严格要求。通过分析和焊接工艺评定试验,掌握了其应采取的工艺措施和正确的焊接热规范,解决了焊后淬硬和冷裂纹问题,为获得优良的焊接接头提供了可靠依据。 As A335GrP91 steel martensitic steel, with a tendency of cold cracking and brittle tendencies, so the welding process and heat treatment processes have strict requirements. Through the analysis and welding process qualification test, mastered the process measures and the correct welding heat specifications, solved the problem of post-weld hardened and cold crack, and provided a reliable basis for obtaining excellent welded joints.