预硬型塑料模具钢P20BSCa的切削性能  

The Machinability of a Prehardened Free-Cutting Plastic Mould Steel P20BSCa

作　　者：赵建生[1] 乔学亮[1] 孙培祯 崔昆[1] 

机构地区：[1]华中理工大学

出　　处：《机械工程材料》1996年第1期36-38,共3页Materials For Mechanical Engineering

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.

关 键 词：模具钢 切削性能 易切削钢 

分 类 号：TG142.45[一般工业技术—材料科学与工程]