【摘要】 测定了Ｗ６Ｍｏ５Ｃｒ４Ｖ２高速钢的临界氮势ｒｃ和传质因子，提出了按氮势门槛值控制的可控渗氮工艺及按最优扩散条件可控渗氮曲线控制的可控渗氮工艺。成功地抑制了高速钢Ｗ６Ｍｏ５Ｃｒ４Ｖ２渗氮层的脆性。试验表明Ｗ６Ｍｏ５Ｃｒ４Ｖ２高速钢车刀经过可控渗氮处理切削能力大幅度提高，加工中硬度、高韧度材料时，寿命提高几十倍，并能顺利切削硬度高达３７～３９ＨＲＣ的１８Ｃｒ２Ｎｉ４ＷＡ钢。更多还原

【Abstract】 Critical nitrogen potential and mass transferring factor of W6Mo5Cr4V2 high speed steel are measured. Nitrogen potential threshold controlled nitriding and optimum diffusion condition controlled nitriding techiques are proposed. The brittleness of nitrogen layer of the high speed steel is suppressed successfully. The test also showed that life of cutting tools made from high speed steel is also improved by ten times when they are used to cut materials with moderate hardness and high toughness. These lathe tools also can cut steel such as 18Cr₂Ni₄W₄ with 37～39HRC smoothly.更多还原