1.School of Materials Science and Engineering, Taiyuan University of Technology， Taiyuan 030024, Shanxi, China；2.School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China；3.Technology Center, Shanxi Taigang Stainless Steel Co., Ltd.， Taiyuan 030003, Shanxi, China
Abstract：Abstract： The microstructural evolution of 6Mo super austenitic stainless steel during solidification, hot working and heat treatment was reviewed, and the effects of alloying elements on Mo segregation, σ phase precipitation and corrosion resistance were analyzed. Combined with the author's previous work, the effects of boron addition on Mo segregation in solidification stage, evolution of σ phase segregation in heat processing and heat treatment stage, and corrosion resistance were analyzed. As the results show, the boron element has a certain effect on Mo segregation in the solidification stage. B can effectively inhibit the segregation of σ phase at the grain boundary and reduce the number and size of precipitation phase, which is conducive to the improvement of hot ductility. Meanwhile, B can promote the formation of Cr and Morich oxides in the outer layer of passivation film, which makes the surface of passivation film and the interface of substrate more compact, and the corrosion resistance is improved significantly by reducing the Cr and Mo depleted zones at the grain boundary.
高涛1，王剑1，李花兵2，白晋钢3，韩培德1，姜周华2. 硼微合金化对6Mo超级奥氏体不锈钢微观组织及耐蚀性影响[J]. 钢铁研究学报, 2021, 33(8): 807-819.
GAO Tao1，WANG Jian1，LI Huabing2，BAI Jingang3，HAN Peide1，JIANG Zhouhua2. Effect of boron microalloying on microstructure and corrosion resistance of 6Mo super austenitic stainless steel. JOURNAL OF IRON AND STEEL RESEARCH , 2021, 33(8): 807-819.
2021, Vol. 33 
