硬质合金圆盘刀分切硅钢片的磨损形态及机理研究

分析了圆盘剪分切加工过程中圆盘刀的受力，利用硬质合金圆盘刀进行了硅钢片的分切加工试验,研究了硬质合金圆盘刀的磨损，对比分析了圆盘刀刃口磨损前后的表面形貌、微观结构和钴元素含量的变化，探讨了其磨损形式及机理。结果表明，硬质合金圆盘刀磨损主要在刃口两侧形成磨损带，随着磨损的发生,圆盘刀切削刃过渡圆弧半径增大、刃口变钝，刀具的磨损形式主要表现为WC硬质颗粒裸露脱落及材料的黏结撕裂，磨损机理主要为硬质合金黏结相钴元素的流失、疲劳磨损和黏结磨损。

Wear Forms and Mechanism of Carbide Alloy Disc Cutter in Disc Slitting Process for Silicon Steel Sheet

The force of disc cutter was analyzed in the disc slitting process, and the slitting experiments of silicon steel sheet using carbide alloy disc cutter were conducted to study the wear process of the disc cutter.The surface topography, microstructure and percentage variation of Co-content before and after  wear of the carbide alloy disc cutter were compared, and the wear mechanism of the disc cutter was investigated.Experimental results indicate that the wear of carbide alloy disc cutter mainly occurs on the side of the cutting edge. The fillet radius of the cutting edge becomes bigger and the cutting edge of the disc cutter becomes blunt with the wear of the disc cutting tool. The wear mechanism of the disc cutter is mainly the loss of bonded phase cobalt, fatigue wear causing the desquamation of WC grain and adhesive wear.