短时固溶处理温度对SAF2507超级双相不锈钢点蚀行为的影响  

Effect of Short Time Solid Solution Treatment Temperature on Pitting Corrosion Behavior of SAF2507 Super Duplex Stainless Steel

作　　者：赵泽 张子英[1] 李慧林 张彪 曹春峰 ZHAO Ze ZHANG Ziying LI Huilin ZHANG Biao CAO Chunfeng(School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China)

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《热加工工艺》2017年第20期230-232,235,共4页Hot Working Technology

基　　金：上海市自然科学基金项目(14ZR1418700);上海市大学生创新项目(cs1605012)

摘　　要：利用恒电位临界点蚀温度测试法和微观形貌观察法研究了短时固溶处理温度对SAF 2507超级双相不锈钢的微观形貌演变和点蚀行为的影响。结果表明,当固溶温度从1020℃提高到1150℃时,样品的铁素体的体积分数明显增加,而铁素体中的铬、钼等元素含量逐渐降低。SAF 2507超级双相不锈钢的临界点蚀温度(CPT)随着短时固溶处理温度的增加先升高后降低,在1100℃达到最大值。The effects of short time solid solution treatment temperature on the microstructure evolution and pitting corrosion behavior of SAF2507 super duplex stainless steel were studied by means of the constant potential critical pitting temperature test method and the microscopic morphology observation method. The results indicate that when the solution treatment temperature increases from 1020 to 1150℃, the volume fraction of the ferrite in the sample increases obviously, while the contents of chromium, molybdenum and other elements decrease gradually. The critical pitting temperature （CPT） of SAF2507 super duplex stainless steel increases firstly and then decreases with the increase of short time solid solution treatment temperature, and reaches the maximum at 1100℃.

关 键 词：超级双相不锈钢 微观组织 临界点蚀温度 点蚀 

分 类 号：TG156.94[金属学及工艺—热处理] TG171[金属学及工艺—金属学]