晶界工程对硼微合金化S31254超奥氏体不锈钢耐晶间腐蚀性能的改善研究  

Study on Improvement of Grain Boundary Engineering on Intercrystalline Corrosion Resistance of Boron Microalloying S31254 Superaustenite Stainless Steel

作　　者：杨硕 梁小红[1] 梁超雄 韩培德[1] YANG Shuo;LIANG Xiaohong;LIANG Chaoxiong;HAN Peide(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《热加工工艺》2023年第14期142-146,149,共6页Hot Working Technology

基　　金：国家自然科学基金面上项目(51871159)。

摘　　要：采用晶界工程对硼微合金化S31254超奥氏体不锈钢的组织进行优化,研究硼微合金化对其抗晶间腐蚀(IGC)性能的影响。结果表明:首先冷压变形9%,然后在1170℃退火10 min后,试样产生的退火孪晶数量最多。经过晶界工程处理材料的孪晶界在长时间的硫酸铁-硫酸试验(48 h)后,腐蚀显著减轻。证实了孪晶界能有效地中断随机大角度晶界网络的连通性,从而提高硼微合金化超奥氏体不锈钢的耐晶间腐蚀性能。The microstructure optimization of boron microalloying S31254 super austenitic stainless steel through grain boundary engineering(GBE)and its effects on the intergranular corrosion(IGC)resistance were investigated.The results show that the largest amount of annealing twins appear in the specimen cold-compressed by 9%and then annealed at 1170℃for 10 min.The grain boundary microstructure optimization can be realized through GBE in boron microalloying S31254.Twin boundaries of crystalline boundary engineered treated materials significantly reduce corrosion after a long iron sulfate-sulfuric acid test(48 h).It is confirmed that the twin bound can effectively interrupt the connectivity of stochastic large-angle crystal boundary networks,thus improving the intercrystalline corrosion resistance of boron-microalloyed superaustenitic stainless steel.

关 键 词：超奥氏体不锈钢 晶界工程 硼微合金化 晶间腐蚀 

分 类 号：TG156.2[金属学及工艺—热处理] TG174.3[金属学及工艺—金属学]