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在轻纺,轻工、机械等行业中,有不少尺寸较小而形状复杂的零件。这类零件是由低(中)碳钢或低(中)碳低合金钢制做的,其工作条件是高速、轻载,与水汽和大气灰尘有较多的接触。这类零件往往是易损件,其技术要求是有一定厚度(0.20～0.30毫米)的高硬度、抗腐蚀的表面,而且在强化热处理后只允许有微量的变形。过去规定用930℃渗碳或840～860℃碳氮共渗、液体氰化等热处理工艺。但由于处理温度高,零件变形大,往往需要再
In the textile, light industry, machinery and other industries, there are many smaller and complex shape of the parts. Such parts are made of low (medium) carbon steel or low (medium) carbon low alloy steel, and their working conditions are high speed, light load and more contact with water vapor and atmospheric dust. Such parts are often wearing parts, the technical requirements are a certain thickness (0.20 ~ 0.30 mm) of high hardness, corrosion-resistant surface, but also in the heat treatment only allows a slight deformation. In the past the provisions of 930 ℃ carburizing or 840 ~ 860 ℃ carbonitriding, liquid cyanide and other heat treatment process. However, due to high temperature, deformation of parts, often need to be re-