材料期刊网

应用炼钢过程中夹杂物控制的热力学模型预测钢包精炼和钢液凝固后钢中氧化物夹杂的成分，在模型预测指导下进行了自润滑易切削钢工业生产试验，并对开发的易切削钢进行了切削性能测试。结果表明，钢中氧化物夹杂预测结果与实测结果一致；用无涂层P10刀具进行的切削试验结果也表明，与传统含铅易切削钢相比，自润滑易切削钢在高速(v≥200 m/min)切削条件下，后刀面磨损降低200%；切削速度v=100 m/min时，二者相当；v=200 m/min时，前刀面月牙洼磨损降低200%，且月牙洼离刀刃较远。说明在高速切削条件下，开发的新一代自润滑易切削钢的切削性能明显优于传统含铅易切削钢，完全可替代传统含铅易切削钢。

The chemical composition of oxide inclusions formed in steelmaking process is predicted by thermodynamical modeling and the industrial trials are carried out. The result demonstrates that the predicted oxide inclusions are very closed to that in the steel. For machining an inclusion engineered work piece, both the crater wear and the flank wear of an uncoated P10 tool are significantly improved. The tool life is tripled at cutting speeds larger than 200 m/min, and maintains the original level at 100 m/min. The crate depth decreases by 200% and it moves beyond the edge. The industrial results show that the machinability of the new generation selflubricated free cutting steel produced by inclusion engineering technology is better than conventional lead free cutting steel, and it can be replaced by the selflubricated free cutting steel.