深冷处理对高速钢高低温力学性能的影响研究

研究了深冷处理和未深冷处理的试样在室温及高温下的力学性能 .结果表明 ,深冷处理试样的力学性能明显提高 ;深冷处理和未深冷处理试样的磨损表面形貌和垂直截面形貌有显著差异 ,说明它们有不同的磨损规律 ;通过X 射线衍射还发现 ,深冷处理可使马氏体轴比和碳含量下降 ,促使新相碳化物MC析出 .

Effect of cryogenic treatment on mechanical properties of high-speed steel at high temperature and room temperature

The mechanical properties of cryogenically treated high speed steel samples at room temperature and high temperature and entreated ones are investigated. It is shown that cryogenic treatment of the samples can improve their mechanical properties remarkably and that there is obvious difference in the morphology of wearing surface and perpendicular cross section for treated and untreated samples, so that it can be induced that they are obedient to different wear patterns. It is discovered by X ray diffraction analysis that the c/a ratio and carbon quantity of martensite in treated wearing surface is lower than those in untreated wearing surface, and cryogenic treatment can enforce MC to precipitate .