Abstract：A decarburization and denitrification layer will be formed on the surface of X30N high nitrogen stainless bearing steel after heat treatment.In order to investigate the influence of local composition changes of C and N on the precipitation of secondary phases in the material,the precipitated phases were separated from the matrix by electrolytic extraction using 10 g/L lithium chloride-40 g/L sulfosalicylic acid-5%(V/V) glycerol methanol solution.The structure and morphology of precipitated phases were studied by X-ray diffraction(XRD) and scanning electron microscope(SEM).The elemental contents in precipitated phases were measured using carbon-sulfur analyzer,nitrogen analyzer and inductively coupled plasma atomic emission spectrometer(ICP-AES).The results showed that the main types of precipitated phases in the test steel were M23C6 and Cr2(C,N).The decarburized surface was dominated by Cr2(C,N).With the increase of the depth from the decarburized surface,the diffraction spectrum peak of M23C6 was gradually obvious.The total content of precipitated phases gradually increased,and basically reached stability at 0.4 mm below the decarburized surface.The content of C increased by 460% compared to the surface of decarbonization layer.Meanwhile,the content of N increased by 38.9%,and the content of total precipitated elements increased by 85.2% compared to the surface of decarbonization layer.The morphology of Cr2(C,N) was mainly in spherical particles,and the morphology of M23C6 was mainly in irregular short rods.
许洁, 李玲霞, 王存宇, 李菁菁. 表面脱碳对高氮不锈轴承钢中析出相的影响[J]. 冶金分析, 2024, 44(4): 40-44.
XU Jie, LI Lingxia, WANG Cunyu, LI Jingjing. Influence of surface decarburization on precipitated phase of high nitrogen stainless bearing steel. , 2024, 44(4): 40-44.
[1] 俞峰,魏果能,许达.不锈轴承材料的研究和发展[J].钢铁研究学报,2005,17(1):6-9. YU Feng,WEI Guoneng,XU Da.Research and development of stainless bearing material[J].Journal of Iron and Steel Research,2005,17(1):6-9. [2] U.卡曼奇.曼德里.高氮钢和不锈钢:生产,性能与应用[M].北京:化学工业出版社,2006. [3] 鲍俭,杨卯生,王华昆.热处理工艺对20Cr14Co12Mo5轴承钢力学性能的影响[J].钢铁,2010,45(1):91-95. BAO Jian,YANG Maosheng,WANG Huakun.Effect of heat treatment on mechanical properties of bearing steel 20Cr14Co12Mo5[J].Iron and Steel,2010,45(1):91-95. [4] 陈豪,徐海峰,周天鹏,等.淬火和低温处理对X30CrMoN151组织性能影响[J].钢铁,2019,54(9):85-93. CHEN Hao,XU Haifeng,ZHOU Tianpeng,et al.Effect of quenching and low temperature treatment on microstructure and properties of X30CrMoN151[J].Iron and Steel,2019,54(9):85-93. [5] 徐海峰,曹文全,俞峰,等.国内外高氮马氏体不锈轴承钢研究现状与发展[J].钢铁,2017,52(1):53-63. XU Haifeng,CAO Wenquan,YU Feng,et al.Current research status and development of domestic and foreign high nitrogen martensitic stainless bearing steel[J].Iron and Steel,2017,52(1):53-63. [6] 李玲霞,李南,荣凡.高氮不锈钢固溶时效碳氮化物析出相分析[J].冶金分析,2011,31(9):1-6. LI Lingxia,LI Nan,RONG Fan.Carbonitride percipitate phase analysis of high-nitrogen stainless steel after solution and aging treatment[J].Metallurgical Analysis,2011,31(9):1-6. [7] 郑善举,杨卯生,张启富,等.氮元素对马氏体不锈钢组织和性能的影响[J].材料热处理学报,2017,38(1):102-105. ZHENG Shanju,YANG Maosheng,ZHANG Qifu,et al.Effect of nitrogen element on microstructure and properties of martensitic stainless steel[J].Transactions of Materials and Heat Treatment,2017,38(1):102-105. [8] 陆金生.钢和合金中常见相X-射线鉴定手册[M].北京:钢铁研究总院,1990.
