摘要
采用粉末注射成形制备了SAF 2507双相不锈钢,研究了固溶温度对烧结件显微组织、力学性能、耐腐蚀性能的影响。结果表明:在随炉缓冷过程中烧结件会有σ相析出,σ相的溶解温度为1000℃;随着固溶温度的升高,α含量逐渐增加,γ含量逐渐减少,1100℃固溶处理时,α、γ两相含量比例接近1∶1,SAF 2507钢的抗拉强度600 MPa,伸长率24.79%,自腐蚀电位值最大、自腐蚀电流密度值最小,分别为-0.241V_(SCE)、1.474×10^(-5)A·cm^(-2),此时,SAF 2507钢耐腐蚀性能最好。
SAF 2507 duplex stainless steel was prepared by powder injection molding.The effects of solution temperature on the microstructure,mechanical properties and corrosion resistance of sintered parts were studied.The results show that,during the slow cooling process with furnace,σphase precipitates in the sintered parts,and theσphase dissolution temperature is 1000℃.when solution treatment at 1100℃,the ratio ofαphase content andγphase content is close to 1∶1.The tensile strength of SAF2507 steel is 600 MPa,the elongation is 24.79%,the self-corrosion potential value is the largest,the self-corrosion current density value is the smallest,the values are-0.241 VSCE and 1.474×10-5A·cm-2,respectively.At this moment,the corrosion resistance of SAF 2507 steel is the best.
作者
陈晓秋
庞午骥
尚峰
张鹏
李化强
张奕
CHEN Xiaoqiu;PANG Wuji;SHANG Feng;ZHANG Peng;LI Huaqiang;ZHANG Yi(School of Mechanical and Ocean Engineering,Huaihai Institute of Technology,Lianyungang 222005,China;Jiangsu Marine Resources Development Research Institute(Lianyungang),Lianyungang 222005,China;LYGTM New Materials Group Co.,Ltd.,Lianyungang 222000,China)
出处
《热加工工艺》
北大核心
2019年第6期195-198,共4页
Hot Working Technology
基金
连云港市科技计划(产业前瞻与共性关键技术)资助项目(CG1514)
江苏省大型工程装备检测与控制重点建设实验室开放课题资助项目(JSKLEDC201506)
江苏省科协首席专家(工程师)资助项目(苏科协发[2017]201号)
江苏省研究生科研创新计划资助项目(KYCX18-2592)
关键词
固溶处理
粉末注射成形
双相不锈钢
显微组织
力学性能
耐腐蚀性能
solution treatment
powder injection molding
duplex stainless steel
microstructure
mechanical properties
corrosion resistane
