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通过优化电炉出钢喷炭粉、调整脱氧制度、选择合适时机的钙处理、采用合理的调硫工艺和浇注前净搅拌操作等一系列措施,经“超高功率电弧炉冶炼+炉外精炼+真空脱气+连铸”工艺流程,批量生产出全氧含量不大于20×10-6、硫化物夹杂级别不大于2.0级的汽车用含硫齿轮钢,确定了含硫钢最佳的钙处理工艺,解决了连铸水口堵塞问题。
By optimizing the electric furnace tapping carbon powder, adjust the deoxygenation system, choose the appropriate timing of calcium treatment, the use of a reasonable sulfur-adjusting process and pouring before the net mixing operation and a series of measures, the “ultra-high power electric arc furnace refining + furnace refining + Vacuum degassing + continuous casting ”process, mass production of sulfur content gear not more than 20 × 10-6, sulfide inclusion level of not more than 2.0 gear steel to determine the best sulfur-containing steel Calcium treatment process, to solve the blockage of the continuous casting nozzle.