关键词: 冷轧工作辊冶金质量, 电渣气氛保护改进, 电渣水冷强化改善, 电渣锭细长化改变

Abstract: The three typical problems of metallurgical quality defects of forged steel cold rolling work rolls， including inclusion exceeding the standard， carbide segregation and surface random defects （DRS）， were thoroughly studied and analyzed. By adopting the improved ESR sealing cover and atmosphere protection， the oxygen concentration was around 0.001 0%， and the inclusion exceeding rate was reduced by 4%-5%； Through the improvement of water quality and inlet water temperature by water cooling strengthening of electric slag， achieving a control range of inlet temperature of 15-35 ℃， inlet and outlet water temperature difference of 4-5 ℃， and a qualified rate of liquid carbide segregation was close to 100%； The specification of the ESR ingot was changed by the elongation of the ESR ingot， the DRS qualification rate for surface random defects has increased from 85% to 92%， and the metallurgical quality of the cold rolling roll is effectively improved.

Key words: Metallurgical Quality of Cold Rolling Work Roll, Improvement of ESR Atmosphere Protection, Perfected of ESR Water Cooling Strengthening, Change of ESR Ingot Elongation