20MnMo与13MnMoNi54焊接接头耐腐蚀性能研究
Investigation on Corrosion Behavior of 20MnMo/13MnMoNi54 Dissimilar Welded Joints
韩志伟， 屈金山， 黄 峰， 闫 霞
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作者单位：西华大学 材料科学与工程学院，四川 成都 610039
中文关键字： 异种金属接头；热处理；热腐蚀
英文关键字：dissimilar weld joint; heat treatment; corrosion
中文摘要：对20MnMo钢与13MnMoNi54钢异种金属焊接接头的腐蚀行为进行了研究。将焊接接头先分别进行400、500、600 ℃热处理，然后再将其在硫酸钠和硫酸钾混合溶液中浸泡504 h，通过对比腐蚀前后的金相组织、质量、测试腐蚀后的显微硬度，得出试样主要发生了局部腐蚀，焊接接头在400 ℃到500 ℃之间时，其焊缝耐腐蚀性能要优于母材、热影响区和熔合区。
英文摘要：The corrosion behavior of 20MnMo/13MnMoNi54 welded joint was studied. The tested specimens were cut from the welded joint subjected to heat treatment at the temperature of 400 ℃, 500 ℃ and 600 ℃ respectively, and then were put in the sodium sulfate and in the potassiumsulfate mix solution for 504 h. The microstructure, weight, and hardness of the tested specimens was measured and compared. The results show that local corrosion occurs mainly in the specimens, the corrosion resistance of the 20MnMo/13MnMoNi54 welded joint is better than that of the base metal, the heat-affected zone and the fusion zone metals between 400 ℃ and 500 ℃.