某炼钢厂利用连铸方坯在生产200 mm×200 mm GCr15轴承钢时,发现铸坯表面断断续续地出现纵向渣沟缺陷,对此类缺陷进行取样,并进行相关检测分析与工艺排查。结果表明:结晶器保护渣理化性能不合理引起的铸坯表面润滑不良是造成高碳铬G...某炼钢厂利用连铸方坯在生产200 mm×200 mm GCr15轴承钢时,发现铸坯表面断断续续地出现纵向渣沟缺陷,对此类缺陷进行取样,并进行相关检测分析与工艺排查。结果表明:结晶器保护渣理化性能不合理引起的铸坯表面润滑不良是造成高碳铬GCr15铸坯渣沟的主要原因。通过调整保护渣关键理化指标,确保结晶器内铸坯的良好润滑效果,经过长期实践验证,有效预防了连铸坯表面渣沟缺陷的发生。展开更多
The formation mechanism of 'white band' and central carbon segregation of high-carbon Cr bearing steel concasting billets are discussed in this paper. The maximum oxygen content in the steel produced by concas...The formation mechanism of 'white band' and central carbon segregation of high-carbon Cr bearing steel concasting billets are discussed in this paper. The maximum oxygen content in the steel produced by concasting process was 13xl0^-6 with an average oxygen content of 9.3xl0^-6. Comparison of metallurgical quality and fatigue property between the concasting steel (CC) and ingot casting steel (IC) showed that the carbon segregation (C/C0) in former steel was 0.92～1.10 and its fatigue life was equal to that of the latter steel.展开更多
文摘某炼钢厂利用连铸方坯在生产200 mm×200 mm GCr15轴承钢时,发现铸坯表面断断续续地出现纵向渣沟缺陷,对此类缺陷进行取样,并进行相关检测分析与工艺排查。结果表明:结晶器保护渣理化性能不合理引起的铸坯表面润滑不良是造成高碳铬GCr15铸坯渣沟的主要原因。通过调整保护渣关键理化指标,确保结晶器内铸坯的良好润滑效果,经过长期实践验证,有效预防了连铸坯表面渣沟缺陷的发生。
文摘The formation mechanism of 'white band' and central carbon segregation of high-carbon Cr bearing steel concasting billets are discussed in this paper. The maximum oxygen content in the steel produced by concasting process was 13xl0^-6 with an average oxygen content of 9.3xl0^-6. Comparison of metallurgical quality and fatigue property between the concasting steel (CC) and ingot casting steel (IC) showed that the carbon segregation (C/C0) in former steel was 0.92～1.10 and its fatigue life was equal to that of the latter steel.
