研究了中国低活化马氏体(CLAM)钢 TIG焊接接头(焊缝和热影响区)在500℃静态饱和氧浓度液态铅铋共晶体(LBE)中的腐蚀行为.未热处理的焊接接头腐蚀时间为200和400 h,回火处理的焊接接头腐蚀时间为400 h.研究发现,钢中有明显的元素的溶解,所有试样表面均形成了具有保护作用的双氧化层,外氧化层为疏松多孔的 Fe3 O 4,内氧化层为致密的 Fe-Cr 尖晶石,没有发现 Pb、Bi 渗透进基体材料.回火处理可有效提高焊接接头的耐腐蚀性能,焊缝耐蚀性低于热影响区.
The corrosion behavior of China Low Activation Martensitic (CLAM)steel TIG weldment(weld zone and heat affected zone)in stagnant lead bismuth eutectic saturated by oxygen at 500 ℃ was studied in this paper. The corrosion time of as-welded CLAM steel was 200 and 400 h,while the as-tempered CLAM steel was ex-posed for 400 h.The results show that dissolution of steel components was observed.A protective double layer oxide film which consists of a loose and porous Fe3 O 4 outer layer and a dense Fe-Cr spinel inner layer was formed on surface of all the samples.No penetration of Pb,Bi into the matrix was found.The post-weld tempe-ring process can improve corrosion resistance effectively.The corrosion resistance of heat affected zone was supe-rior to weld zone.
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