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本文研究了不同的表面强化方法(钢球滚压、超声波处理和金刚石整平)对 P6M5与 P9K5高速钢工具表层质量与使用寿命的影响。表层质量根据表面硬度、显微硬度与残余应力的大小、精细的晶体结构与相变的研究结果以及动力学状况进行评定。表面强化处理按下述规范进行:钢球滚压一垂直静压力 P_(CT)=250～2000牛顿、钢球直径 d=4～6毫米;金刚石整平——P_(CT)=50～300牛顿、球面半径 R=2～3毫米;超声波表面强化——P_(CT)(?)50～350牛顿、d=4～6毫米,超声波振幅 A=5～30微米,频率 f=20千赫。按上述几种
In this paper, the effects of different surface strengthening methods (ball rolling, ultrasonic treatment and diamond leveling) on the surface quality and service life of P6M5 and P9K5 high speed steel tools were studied. Surface quality is assessed by the surface hardness, the microhardness and the residual stress size, the fine crystal structure and phase transition studies, and the kinetics. The surface strengthening treatment is carried out according to the following specifications: ball rolling a vertical static pressure P_ (CT) = 250 to 2000 Newtons, ball diameter d = 4 to 6 mm; diamond leveling - CT_ = 50 to 300 Newton, spherical radius R = 2 to 3 mm; ultrasonic surface enhanced - CT (?) 50 to 350 Newtons, d = 4 to 6 mm, ultrasonic amplitude A = 5 to 30 microns, frequency f = 20 kHz . According to the above several