摘要
将316L和430水雾化不锈钢粉末按照65:35的质量比混合,采用冷等静压-真空烧结工艺制备了双相不锈钢,在1150~1300℃进行固溶处理,每次保温1 h。研究了不同固溶处理温度双相不锈钢显微组织的演变,利用动电位极化和电化学阻抗谱研究了固溶处理温度对双相不锈钢耐腐蚀性能的影响。结果表明:随着固溶处理温度增加,铁素体含量逐渐增加,奥氏体含量逐渐减少,晶粒逐渐长大;1300℃时,铁素体与奥氏体两相比例为39.1:60.9,此时双相不锈钢具有较好的耐腐蚀性能。
The 316 L and 430 water atomized stainless steel powders were mixed according to the mass ratio of 65:35,and the duplex stainless steel was prepared by the cold isostatic pressure-vacuum sintering process,the solution treatment was carried out in 1150-1300℃,with a insulation for 1 h at a time.The evolution of microstructure of duplex stainless steel with different solution treatment temperature was studied,and the effect of solution treatment temperature on corrosion resistance of duplex stainless steel was studied by dynamic potential polarization and electrochemical impedance.The results show that with the increase of solution treatment temperature,the content of ferrite phase increases gradually,the content of austenite phase decrease gradually,the grain grows gradually;and the two phase ratio of ferrite to austenitic is 39.1:60.9 at 1300℃,and at this moment,duplex stainless steel has good corrosion resistance.
作者
张鹏
王智勇
尚峰
李化强
贺毅强
ZHANG Peng;WANG Zhiyong;SHANG Feng;LI Huaqiang;HE Yiqiang(Engineering Training Center,Jiangsu Ocean Ucean University,Lianyungang 222005,China;School of Mechanical Engineering,Jiangsu Ocean University,Lianyungang 222005.China)
出处
《粉末冶金工业》
CAS
北大核心
2021年第1期64-68,共5页
Powder Metallurgy Industry
基金
江苏省研究生科研创新计划资助项目(KYCX19-2308)
江苏省产学研前瞻性联合研究资助项目(BY2018210)
淮海工学院自然科学基金资助项目(Z2017001)
连云港市521人才工程资助项目(ZKK201805)
连云港市海燕计划资助项目(2018-QD-013)。
关键词
固溶处理
冷等静压
双相不锈钢
显微组织
耐腐蚀性能
solution treatment
cold isostatic pressing
duplex stainless steel
microstructure
corrosion resistance
