摘要
以Q235低碳钢和316L奥氏体不锈钢为母材,采用手工焊条电弧焊,用A042焊条堆焊,A022焊条填充,对Q235/316L进行焊接。焊后对焊接接头分别进行300、500和700℃保温2 h时效处理。处理后对焊接接头进行力学性能测试及断口分析。试验结果表明:经300℃×2 h时效处理的焊接接头比经过500℃×2 h、700℃×2 h时效处理的接头具有更加优异的综合性能。这是由于300℃时效处理的接头组织有利于淬硬相和残余碳化物的溶解,不会出现脆化相,接头组织更加均匀。
Taking Q235 low-carbon steel and 316L austenitic stainless steel as mother material, and the steel was welded by manual arc welding. Taking A042 as overlay and A022 as packing material, the Q235/316L was welded. After welding, the different steel welded joint is aging treated at 300 ℃, 500 ℃ , 700 ℃ for 2 h. Then the mechanical performance test and fracture analysis of the welded joint were carried out. The results show that： the welded point after aging treatment at 300℃ for 2 h has more excellent combination property than that of 500℃ and 700℃. The reason is that the joint tissue with aging treatment of 300℃ is benefical to dissolve the hardening and residual carbide, which can lead to no embrittlement phase. Then the microstructure of the welded joint is more uniform than before.
出处
《热加工工艺》
CSCD
北大核心
2013年第9期169-173,共5页
Hot Working Technology
