目前国内煤矿井下机械化开采遇到的复杂采煤层（大坡度、全岩等）问题越来越多，对于采煤机行走机构的可靠性要求也越来越高，齿轨轮作为行走机构的关键零部件，对其抗疲劳和抗磨损性能要求也越来越高。 在齿轮制造过程中，要获得良好的耐磨性和疲劳强度，渗碳淬火是关键因素之一。因此控制渗碳齿轮的质量和对齿轮渗碳的工艺进行改性研究对提高齿轮的使用性能有重要意义。 本文针对采煤机行走机构上齿轨轮的渗碳淬火工艺进行研究分析，选用材料为电渣重熔钢18Cr2Ni4WA，运用DEFORM分析软件对影响齿轨轮渗碳层深度的因素进行仿真模拟，采用正交实验方法对其进行分析，得出渗碳时间和渗碳温度是影响渗碳层深度的主要因素；为了提高齿轨轮的渗碳层深度，采用多次强渗扩散渗碳工艺并与常规的一次强渗扩散工艺进行对比分析，仿真和实际试验都共同验证了选用方案的可行性。 同时运用DEFORM软件以及实际试验共同验证分析了优化齿轨轮碳化物等级的方案，并对齿轨轮的不同位置碳浓度曲线进行分析研究，为磨削工艺方案的制定提供支持。仿真模拟了渗碳工艺对齿轨轮组织、残余应力和变形的影响规律，以及不同淬火温度对齿轨轮残余应力、变形和使用性能的影响。以上研究分析对控制齿轨轮渗碳质量及提升齿轨轮性能都有一定的指导意义。

Currently, there are more and more problems about mining complex layer (large slope, the whole rock, etc.) in the domestic coal mine mechanized mining . The reliability requirement of the shearer’s haulage mechanism becomes higher and higher. Gear wheel is the key component of the haulage mechanism. The requirement of the gear wheel’s fatigue and wear performance also becomes more and more higher. In the gear manufacturing process, to obtain a good wear resistance and fatigue strength, carburizing and quenching is one of the key factors. Therefore the quality control of carburized gear and on the gear carburizing process modification research has important significance to improve the use performance of gear. In this paper, the research and analysis of the haulage mechanism on the coal mining machine in the process of carburizing and quenching, selection of materials for electro slag remelting steel 18Cr2Ni4WA, The factors that affect the depth of the layer of the gear wheel are simulated by using DEFORM software. And the orthogonal experimental method is used to analyze the results of the experiment, It is concluded that the carburizing time and temperature are the main factors influencing the depth of the carburizing layer; In order to improve the depth of carburizing layer, several times strong infiltration diffusion carburizing process is put forward, then compared with the conventional one time diffusion process, both the simulation and the actual experiments verify the feasibility of the project. At the same time, the DEFORM software and the actual test are used to verify and analyze the optimization of the carbide grade of the gear wheel, the carbon concentration curve of different position of gear wheel is analyzed and studied, it provides some support for the development of grinding process; The influence of the carburizing process on the structure, residual stress and deformation of the gear wheel is simulated, the influence of different quenching temperature on the residual stress, deformation and the performance of the gear wheel. The above research and analysis have certain guiding significance to the control of the gear wheel and the improvement of the performance of the gear wheel.