脉冲磁场对高速钢刀具材料微观硬度的影响

研究脉冲磁场对W9Mo3Cr4V高速钢刀具材料微观硬度的影响规律. 利用自行构建的磁处理试验平台对高速钢试样进行定向脉冲磁化处理. 研究不同的脉冲磁场强度、磁场频率和磁化时间对高速钢材料微观硬度的影响规律，通过观察高速钢材料金相组织，分析脉冲磁场作用下高速钢材料的微观组织变化机制. 试验结果表明，在选择合适的脉冲磁化工艺参数条件下，高速钢材料的微观硬度能够明显提高. 脉冲磁场作用促使金属材料中一部分残余奥氏体转化为硬而脆的马氏体，使马氏体含量升高，材料组织变得均匀. 

Effects of Pulsed Magnetic Field on the Micro-Hardness of HSS Cutting Tool Materials

Researched on micro-hardness of W9Mo3Cr4V high speed steel (HSS) cutting tool material with the impact of pulsed magnetic field. The HSS samples were magnetized with directional pulse on a self-build platform for the magnetic treatment test. The effects of different pulse magnetic field strength, frequency and magnetization time on the micro-hardness of HSS material were studied, and the changes of HSS material microstructure under the action of pulse magnetic field were analyzed by observation metallurgrical structure. Test results indicate that the appropriate pulse magnetization parameter can improve the specimen micro-hardness of HSS material obviously. Pulsed magnetic can make part of the retained austenite translate into hard and brittle martensite inside the metallic material, which makes martensite content increase, and material organization become more uniform.