GCr15轴承钢碳化物高温扩散的研究

RESEARCH ABOUT CARBIDE HIGH-TEMPERATURE DIFFUSION IN GCr15 BEARING STEEL

由于轴承钢的碳含量较高,在钢液凝固过程中易形成较大的碳偏析,且在后期的加热、轧制过程中难以有效消除。研究了240 mm×240 mm GCr15轴承钢大方坯碳化物析出形态、金相组织随不同加热工艺制度的变化,通过理论推算了GCr15轴承钢的高温扩散系数,确定了最佳加热的工艺。

Because of relatively high content of carbon in bearing steel,rather much carbon segregation is easily formed in molten steel in solidification,and difficult to be eliminated effectively in later heating and rolling.It is researched in large square billet of GCr15 bearing steel（240 mm×240 mm） the carbide segregation shape and metallographic structure change along with heating process system,the high-temperature diffusion index of GCr15 bearing steel is calculated based on theory,the best heating process is determined.