Abstract：GCr15 bearing steel is a kind of high carbon steel. The segregation of elements especially for carbon has great influence on the structure and performance of steel.The original position statistic distribution analysis technique was used to compare and analyze the whole cross section of continuous casting billet and central area of electroslag remelting ingot of GCr15 bearing steel. The segregation of C and Cr as well as the porosity of sample surface were focused. According to the two-dimensional contour map of C and Cr contents as well as the comparison analysis of statistical segregation, it was found that both C and Cr in cross section of continuous casting billet had serious center segregation phenomenon. Meanwhile, in the periphery of center segregation region, the cyclic and discontinuous negative segregation band of C caused by dendrite bridging was observed. The distribution of C and Cr in center region of GCr15 electroslag remelting ingot was relatively uniform. In other words, the segregation phenomenon was significantly improved. Moreover, the statistical compactness and statistical porosity of sample surface before and after electroslag remelting indicated that the compactness degree of electroslag remelting ingot was obviously better than the continuous casting billet.
左晓剑,刘洋,成国光,李晶. GCr15轴承钢连铸方坯与电渣重熔铸锭的 原位统计分布分析[J]. 冶金分析, 2018, 38(10): 1-6.
ZUO Xiao-jian,LIU Yang,CHENG Guo-guang,LI Jing. Original position statistic distribution analysis of the continuous casting billet and electroslag remelting ingot of GCr15 bearing steel. , 2018, 38(10): 1-6.
李昭昆,雷建中,徐海峰,等.国内外轴承钢的现状与发展趋势[J].钢铁研究学报,2016,28(3):1-12.LI Zhao-kun,LEI Jian-zhong,XU Hai-feng,et al.Current status and development trend of bearing steel in China and abroad[J].Journal of Iron and Steel Research,2016,28(3):1-12.
[2]
杨光维,郝鑫,杨叠,等.GCr15轴承钢冶炼过程钢液洁净度变化[J].钢铁,2014,49(11):31-35.YANG Guang-wei,HAO Xin,YANG Die,et al.Cleanliness of GCr15 bearing steel during steelmaking process[J].Iron and Steel,2014,49(11):31-35.
[3]
王海舟.材料组成特性的统计表征-原位统计分布分析[J].理化检验:化学分册,2006,42(1):1-5.WANG Hai-zhou.A new method of statistic characterization of specific properties of materials-original position statistic distribution analysis[J].Physical Testing and Chemical Analysis Part B:Chemical Analysis,2006,42(1):1-5.
[4]
王海舟.原位统计分布分析-材料研究及质量判据的新技术[J].中国科学:B辑,2002,32(6):481-485.WANG Hai-zhou.Original position statistic distribution analysis-new analytical method in quality evaluation and research of material[J].Science China:Series B,2002,32(6):481-485.
[5]
周德光,傅杰,王平,等.轴承钢连铸坯碳偏析的形成机理及影响因素[J].北京科技大学学报,1999,21(2):131-134.ZHOU De-guang,FU Jie,WANG Ping,et al.Formation mechanism of carbon segregation for bearing steel concasting billet and its influencing factors[J].Journal of University of Science and Technology Beijing,1999,21(2):131-134.
[6]
秦志强,康智清,兰楚惠.GCr15连铸坯中心碳偏析原位分析研究[J].现代冶金,2017,45(1):10-13.QIN Zhi-qiang,KANG Zhi-qing,LAN Chu-hui.Original position statistic distribution analysis for the central carbon segregation of GCr15 bearing steel[J].Modern Metallurgy,2017,45(1):10-13.
[7]
赵海东,陈列,严清忠,等.电渣重熔对GCr15轴承钢化学成分和夹杂物特性的影响[J].特殊钢,2016,37(4):44-48.ZHAO Hai-dong,CHEN Lie,YAN Qing-zhong,et al.Effect of electro-slag remelting on chemical composition and characteristics of inclusion in bearing steel GCr15[J].Special Steel,2016,37(4):44-48.
[8]
王海舟,赵沛,陈吉文,等.低合金钢连铸坯的原位统计分布分析研究[J].中国科学:E辑,2005,35(3):260-270.WANG Hai-zhou,ZHAO Pei,CHEN Ji-wen,et al.Original position statistic distribution analysis of low alloy steel continuous casting slab[J].Science China:Series E,2005,35(3):260-270.
[9]
王海舟.原位统计分布分析—冶金工艺及材料性能的判据新技术[J].中国有色金属学报,2004,14(1):98-105.WANG Hai-zhou.Original position statistic distribution analysis-new analytical method in quality evaluation of process metallurgy and metal materials[J].The Chinese Journal of Nonferrous Metals,2004,14(1):98-105.
