为了研究时效处理对Q235/316L异种钢焊接接头组织及性能的影响,采用扫描电镜(SEM)观察了焊接接头的微观组织,并测试了异种钢焊接接头的力学性能和腐蚀性能.结果表明,经300℃×2 h保温,空冷时效处理后的焊接接头比500℃×2 h、700℃×2 h保温,空冷时效处理及不进行时效处理的接头具有优异性能.经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,未出现脆化相,再加上接头合金元素的作用,使接头组织更加均匀,力学性能良好.同时,经300℃时效处理的接头焊缝Cr、Ni含量高,提高其抗应力腐蚀和抗环境腐蚀能力.
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