冶金因素对低合金钢焊接接头耐蚀性的影响  

Effects of metallurgical factors on corrosion behaviors of welded joints of low-alloy steels

作　　者：孔小东[1] 杨明波[1] 朱梅五[1] 

机构地区：[1]海军工程大学理学院化学与材料系,武汉430033

出　　处：《焊接学报》2009年第7期105-109,共5页Transactions of The China Welding Institution

摘　　要：选择四种低合金钢并采用相应配套焊接材料,制备了焊条电弧焊焊接接头试样,通过室内腐蚀挂片试验和电化学测试,研究了焊接接头的不同区域的腐蚀行为,结合化学成分、夹杂物和微观组织分析,探讨相关冶金因素对接头腐蚀行为的影响.结果表明,对于不同钢的焊接接头而言,各接头母材之间、热影响区之间的腐蚀差异主要与其化学成分有关,但焊缝金属和熔合区之间的腐蚀差异则主要取决于夹杂物和微观组织.而同一焊接接头的不同区域的耐蚀性表现了较大差别,有的以焊缝的耐蚀性较差,有的则以母材的耐蚀性较差,导致不同区域耐蚀性差异的主要因素是化学成分、夹杂物、微观组织等.The corrosion behaviors of four low-alloy steels welded joints have been studied by indoor exposure tests and electrochemical tests and the composition,inclusions and microstructures of such joints were also researched,For the different joints,the corrosion resistance of the parent-metal and heat-affect-zone is mainly dependent on the compositions of the steels; while the corrosion resistance of the welded bonds and welded metal is mainly dependent on inclusions and microstrures. For three distinct zones of the same welded joint,the corrosion resistance is different from each other. The corrosion resistance of distinct zones for the same welded joint is closely related to the chemical compositions,inclusions and microstructures of the distinct zones respectively.

关 键 词：低合金钢 焊接接头 海水腐蚀 耐蚀性 

分 类 号：TG172.5[金属学及工艺—金属表面处理]