高镍铬铸钢轧辊加工用聚晶立方氮化硼刀片的制备与性能

摘要

Polycrystalline cubic boron nitride blade containing 80vol% cubic boron nitride was prepared with Al-Ti compound as binder.The microstructure,hardness,wear and cutting performance of the blade were studied and compared with those of the similar products.The results show that the microhardness of the prepared blade reached 3127 HV.The microstructure distributed homogeneously.The wear height of the flank face was 0.28 mm, which was about the same as that of the similar products.The impact resistance number without chipping in interrupted cutting reached 32000 times,which was better than that of the similar products.The number of rollers cut by the blade in roughing processing was 23% higher and the single-edged cutting stroke in finishing processing was 17% higher than those by the similar products.%以铝钛化合物为黏结剂,制备了立方氮化硼体积分数为80%的聚晶立方氮化硼刀片,研究了其显微组织、硬度、磨损性能和切削加工性能,并与同类产品进行了对比.结果表明:所制刀片的显微硬度达到3127 HV,显微组织分布均匀,后刀面磨损高度为0.28 mm,与同类产品的相当;断续切削时达到3.2万次冲击不崩刃,优于同类产品;在粗加工时,该刀片切削轧辊数量比同类产品的高出23%以上,在精加工时其单刃切削行程高出17%以上.