工具在开刃磨削时,其表面上会产生一种不稳定组织的缺欠层。该层的缺欠程度和其达到的深度与磨削条件有关。在磨削后进行回火能提高工具的耐磨性,可是迄今尚未见到有关推荐此种回火工艺的文献。日本有关机构对工具表面层的状态以及磨削对耐磨性的影响进行了分析,找到了使工具表面层组织稳定和提高工具耐磨性的最佳热处理条件。 When the tool is edged, an imperfect layer of unstable tissue is created on the surface. The level of imperfections in the layer and the depth to which it is reached are related to the grinding conditions. Tempering after grinding can improve the wear resistance of the tool, but so far there is no literature on recommending such a tempering process. The Japanese authorities analyzed the condition of the tool surface layer and the effect of grinding on the wear resistance, and found the optimum heat treatment conditions for stabilizing the tool surface layer structure and improving the wear resistance of the tool.