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渗氮处理能有效地提高机械零件的疲劳强度、耐磨性和耐蚀性,同时具有处理温度低,工件变形小等优点,因而被广泛地用于要求尺寸稳定、变形小和耐磨性高的零件。但是一般的气体渗氮工艺由于周期长、能耗大、成本高等原因,影响了其应用。为了改进渗氮工艺以缩短周期,我们试验了预氧化及多段变温热循环快速气体渗氮工艺,对剪板机、折弯机的柱塞、导杆及齿轮等零件进行了处理,使渗氮周期缩短50％以上,工艺质量稳定、取得了明显的综合效益。
Nitriding treatment can effectively improve the mechanical parts fatigue strength, wear resistance and corrosion resistance, and has the advantages of low processing temperature, small deformation of the workpiece, which is widely used in the requirements of dimensional stability, small deformation and high wear resistance Parts. However, the general gas nitriding process due to long cycle, energy consumption, high cost and other reasons, affecting its application. In order to improve the nitriding process to shorten the cycle, we tested the pre-oxidation and multi-stage thermal cycling fast gas nitriding process, the plate shears, bending machine plunger, guide rod and gears and other parts were treated, so that seepage Nitrogen cycle shorter than 50%, process quality and achieved significant overall benefits.