321和310奥氏体不锈钢焊接接头晶间腐蚀性能对比研究
Study on Intergranular Corrosion of Welded Joint of 321 and 310 Austenitic Stainless Steel
毕越宽1,2， 王晓军1,2
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作者单位：（1.兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室，甘肃 兰州 730050；2.兰州理工大学 有色金属合金及加工教育部重点实验室，甘肃 兰州 730050）
中文关键字： 晶间腐蚀； 焊接； 不锈钢
英文关键字：intergranular corrosion; welding; stainless steel
中文摘要：321和310奥氏体不锈钢分别采用A132和A402焊条焊接，焊后依据GB/T4334-2008《金属和合金的腐蚀-不锈钢晶间腐蚀试验方法》对其焊接接头的晶间腐蚀情况进行了对比分析。研究发现，由于Ti元素的存在，321比310更耐晶间腐蚀。A132焊条中含有Nb元素，使用它焊接会向焊缝金属中过渡合金元素，在一定程度上也可以起到抑制晶间腐蚀的作用。由于焊接过程中受到敏化温度影响，焊缝的耐晶间腐蚀性要比母材差。
英文摘要：According to GB/T4334-2008 "Corrosion of metals and alloys-Test methods for intergranular corrosion of stainless steels", the corrosion phenomenon of 321 and 310 austenitic stainless steel welded with A132 and A402 electrode, respectively, was analyzed. The results show that the intergranular corrosion resistance of 321 austenitic stainless steel is better than 310 alloy because of Ti element. During the process of welding, Nb element in the A132 electrode enters weld pool. The deposited metal of A132 electrode includes Nb element, which can restrain the intergranular corrosion. Because the welding is affected by sensitive temperature, the intergranular corrosion resistance of weld metal is worse than that of base metal.