Q345R+904L不锈钢复合板焊接接头力学及腐蚀性能的研究

Study on mechanical and corrosion properties of welded joints of Q345R+904L stainless steel composite plate

针对40 mm厚度规格的Q345R+904L不锈钢复合板,采用不同的焊接材料分别进行基层、过渡层及盖面层的焊接,焊后根据相关标准进行焊接接头的宏观检查、金相分析、力学性能检测、成分分析及晶间腐蚀试验。结果表明,接头成形良好,其拉伸、弯曲及冲击性能都满足标准要求。采用E309LMo和E385不锈钢焊条分别进行了复合板过渡层的焊接,两种方案获得的接头焊缝区和热影响区的抗晶间腐蚀性能都合格。

For the Q345R+904L stainless steel composite plate with 40 mm thickness,different welding materials are used to weld the base layer,transition layer and cover layer respectively.After welding,macroscopic inspection,metallographic analysis,mechanical property test,component analysis and intergranular corrosion test of welded joints are carried out according to relevant standards.The results show that the joints obtained by the welding scheme are well formed,the tensile bending and impact properties of the joints meet the standard requirements.The joints of the composite layer are welded by E309LMo and E385 stainless steel welding consumables respectively.Both the weld zone and the heat affected zone have acceptable intergranular corrosion resistance.