轴承钢连铸坯碳偏析的形成机理及影响因素

Formation Mechanism of Carbon Segregation for Bearing Steel Concasting Billet and Its Influencing Factors

摘要: 对高碳铬轴承钢连铸坯白亮带和中心碳偏析的形成机理及其影响因素进行了系统的分析研究,提出了改善偏析的措施.同时进行了连铸钢与模铸钢内在质量和疲劳性能的对比试验.结果表明,连铸轴承钢坯存在轻微的碳偏析(W_c/W_co=0.92~1.10),其材质的疲劳寿命达到了模铸钢的水平.

Abstract: The mechanism of "white band" and central carbon segregation formation of high-carbon chromium bearing steel concasting billets have been discussed.Comparative tests of metallurgical quality and fatigue property between the concasting steel and ingot casting steel showed that the carbon segregation (w_c/w_co) in steel produced by concasting process was 0.92~1.10 and the fatigue life of the former steel was equal to that of the latter steel.