Heat Resistance of TiN Coated HSS Tools

The cutting friction, cutting deformation, producing heat, conducting heat, temperature field of TiN coated HSS tools in the cutting process are discussed profoundly. In order to make clear the heat property of TiN coated tools, from the micromechanism angle, the relationship of the heat property and the crystal structure of TiN compound is analyzed, and the regularity of TiN compound crystal structure changing with temperature ris-ing is sought. The difference of the wear resistance and heat resistance of TiN coated tools deposited by c1 and c2 depositing techniques is proved by tests. The conclusions will offer the theoretical basis for correct design of geo-metrical parameters of TiN coated tools, rational selection of cutting regimes and optimization of the depositing technique.     

TiN涂层高速钢刀具耐热性的研究

研究了切削过程中TiN涂层高速钢刀具的切削温度场分布特征及其生热、导热特征。通过试验证明了TiN薄膜的热学特征与其晶体结构类型有关 ,用不同工艺方法得到的TiN涂层高速钢刀具的耐热性、耐磨性亦存在明显差别 ,为TiN涂层刀具沉积工艺参数的优化、刀具几何参数及切削用量的合理选择提供了理论依据。