【摘要】 为了对纳米硬质合金磨削温度及热量分配比例进行深入研究，同时探讨不同粒度硬质合金间的差异，为多种粒度硬质合金的磨削加工及质量控制提供参考，选择以纳米硬质合金GU092为主的3种硬质合金进行磨削试验。结果表明：相比普通硬质合金，纳米硬质合金的磨削温度较低，热量分配比例较高，在2.5%～11.8%之间；磨削温度随晶粒度变细而降低，且细粒度材料表面的塑性变形小，磨削时消耗的能量更少；热量分配比例随着晶粒度的变细而增加，细粒度硬质合金的物理机械性能更强，导热性能更好。在考虑加工效率的前提下，适当降低磨削深度、增大进给速度，有助于降低温度、提高质量。更多还原

【Abstract】 In order to deeply study the grinding temperature and heat distribution ratio of nano cemented carbide, and explore the differences between cemented carbide with different particle sizes, so as to provide reference for grinding and quality control of cemented carbide with various particle sizes, three kinds of cemented carbide which main component was nano cemented carbide GU092 were selected for grinding test.The results show that compared with ordinary cemented carbide, nano cemented carbide has lower grinding temperature and higher heat distribution ratio, about 2.5%～11.8%; the grinding temperature decreases with the grain size, the plastic deformation of the surface of fine-grained materials is small, and the energy consumed in grinding is less; the heat distribution ratio increases with the grain size, and the fine-grained cemented carbide has stronger physical and mechanical properties and better thermal conductivity.On the premise of considering the machining efficiency, appropriately reducing grinding depth and increasing feed speed will help to reduce the temperature and improve the quality.更多还原