B、Ce微合金化对S31254超级奥氏体不锈钢析出相及耐蚀性能的影响  

Effect of B and Ce Micro-alloying on Secondary Phase Precipitation and Corrosion Resistance of S31254 Super Austenitic Stainless Steel

作　　者：马晋遥 董楠 郭振森 韩培德[1] MA Jinyao;DONG Nan;GUO Zhensen;HAN Peide(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Instrumental Analysis Center of 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,太原030024 [2]太原理工大学分析测试中心,太原030024

出　　处：《中国腐蚀与防护学报》2024年第6期1610-1616,共7页Journal of Chinese Society For Corrosion and Protection

摘　　要：采用OM、SEM、EDS、电化学测试等方法研究了B、Ce微合金化对S31254超级奥氏体不锈钢的析出相及耐蚀性的影响。析出相分析结果表明,B、Ce的添加都有抑制时效过程中析出相的析出作用,并且B、Ce复合后可改变析出相沿晶界的析出形态。电化学结果显示,B、Ce复合微合金化可提高材料的自腐蚀电位和点蚀电位,促进钝化膜的快速形成并同步提升其稳定性,改善材料的耐点蚀与耐晶间腐蚀性能。因此,本文的研究结果表明相较单一B元素的添加,B、Ce协同对S31254析出相的抑制和耐蚀性提高效果更为显著。The effect of B and Ce micro-alloying on secondary phase precipitation and corrosion resistance of S31254 super austenitic stainless steel were studied by OM,SEM,EDS and electrochemical tests.The results show that the addition of B and Ce can inhibit the precipitation of secondary phase in the aging process and change the morphology of precipitated phase along the grain boundary.The B and Ce micro-alloying can also improve the free-corrosion potential and pitting potential of the S31254 super austenitic stainless steel,promote the rapid formation of passive film,improve its stability synchronously,thus improve the pitting and intergranular corrosion resistance of the steel.Therefore,it follows that the synergistic effect of both B and Ce co-alloying on precipitation inhibition and corrosion resistance of S31254 is significantly more pronounced when compared to the addition of a single B element.

关 键 词：S31254超级奥氏体不锈钢 B、Ce微合金化 析出相 耐蚀性能 

分 类 号：TG174[金属学及工艺—金属表面处理]