摘要
从切削刀具的磨损、切削阻力、切削温度等方面对比了预硬型塑料模具钢P20BSCa与瑞典718钢的可切削性能,并对P20BSCa钢可切削机理进行了研究。结果表明,在相同的预硬硬度条件下,P20BSCa钢具有较小的切削阻力,较低的切削温度,P20BSCa钢硬度为35HRC时切削刀具的磨损量小于718钢硬度为30HRC时刀具的磨损量,其可切削性能提高的原因是钢中低强度MnS夹杂物改变了钢的韧性及塑性,降低了材料与刀具刃部的摩擦系数等因素。
The machinability of a prehardened free cutting plastic mould steel P20BSCa comparedwith that of sweden,s 718 steel in respects of machining resistance, temperature changes in machiningprocess and the wear of cutting edges. The machanism of machinability of the steel was studied. Theresults show that the steel P20BSCa has more excellent machining resistance, lower machining temperature and less wear than that of 718 steel.The improvement of machinability is attributed to the function of free-cutting phase MnS.
出处
《机械工程材料》
CAS
CSCD
1996年第1期36-38,共3页
Materials For Mechanical Engineering