时效对304不锈钢晶间腐蚀行为的影响  

Effect of Aging on Intergranular Corrosion Behavior of 304 Stainless Steel

作　　者：张媛[1] 周小飞[2] 

机构地区：[1]重庆工程职业技术学院矿业与环境工程学院,重庆江津402260 [2]四川大学材料与工程学院,四川成都610000

出　　处：《铸造技术》2016年第5期912-913,921,共3页Foundry Technology

摘　　要：对304不锈钢进行时效处理,利用EPR（电化学动电位再活化法）对时效处理后的试样进行腐蚀试验,通过金相显微镜观察不锈钢微观形貌。结果表明,未经敏化处理的304不锈钢不会有晶间腐蚀的产生,700℃敏化后,在400~500℃时效温度下,随着时效温度的升高,晶间腐蚀敏感性也随之增大。因此,应严格控制304不锈钢的焊接工艺参数,杜绝晶间腐蚀的产生。The aging treatment of 304 stainless steel was carried out, and the corrosion tests of the aged specimens were carried out by using EPR（electrochemical activation potential and activation of the double loop）, and the microstructure of the stainless steel was observed by metallographic microscope. The results show that the 304 stainless steel without sensitization treatment has no intergranular corrosion, the intergranular corrosion susceptibility increases with the increase of aging temperature after the sensitization treatment at 700 ℃ under the aging temperature of 400 - 500 ℃. So welding process parameters should be controlled strictly to prevent intergranular corrosion.

关 键 词：304不锈钢 时效 晶间腐蚀 动电位再活化 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG156.92[金属学及工艺—金属材料]