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影响易切削钢的切削性能的关键因素是钢中夹杂物。作者采用钢包喷粉的加钙方法,经过实验室规模和工业生产规模的试验,建立了合理的炼钢工艺及喷粉工艺,有效地控制了钢中的夹杂物,从而研制成了切削性能优越的钙易切削钢和钙硫易切削钢。所研制成功的钙易切削钢,具有一项独特的优点,即它的切削刀具寿命竞随切削速度的增加而增加;而钙硫易切削钢,其切削性能比钙易切削钢更高,除刀具寿命长达800min外,切削力也降低了约7％,即电能消耗可降低约7％,这一点在能源紧张的今天也具有非常重要的意义。
The key factor affecting the machinability of free-cutting steel is inclusions in steel. The author adopted ladle dusting plus calcium method, after the laboratory scale and industrial production scale test, established a reasonable steelmaking process and dusting process, effectively control the inclusions in steel, thus developed into a superior cutting performance Calcium free-cutting steel and calcium-sulfur free-cutting steel. The successful development of calcium free-cutting steel has the unique advantage that its cutting tool life increases with the increase of cutting speed. However, the cutting performance of calcium-sulfur free cutting steel is higher than that of free-cutting steel except Cutting tool life of up to 800min, the cutting force is also reduced by about 7%, that is, energy consumption can be reduced by about 7%, which is also very important today in energy stress.