齿轮深层渗碳的质量控制及改性研究

发布时间：2018-05-30 10:24

本文选题：渗碳淬火 + 齿轨轮　；参考：《西安科技大学》2016年硕士论文

【摘要】：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。
[Abstract]:At present, there are more and more problems of complex coal seam (large slope, whole rock, etc.) in mechanized mining of underground coal mine in our country, and the reliability requirement of walking mechanism of coal mining machine is more and more high, and the gear rail wheel is the key part of walking mechanism. The requirements for fatigue resistance and wear resistance are becoming higher and higher. Carburizing quenching is one of the key factors to obtain good wear resistance and fatigue strength in gear manufacturing. Therefore, it is important to control the quality of Carburizing gear and to improve the performance of gear by modifying the technology of Carburizing. In this paper, the Carburizing and quenching process of the upper gear rail wheel of the walking mechanism of the shearer is studied and analyzed. The factors affecting the depth of the Carburizing layer of the gear rail wheel are simulated by using DEFORM software and the material is selected as the material of the electroslag remelting steel 18Cr2Ni4WA. The orthogonal test method was used to analyze the carburizing process. The results show that the carburizing time and temperature are the main factors affecting the depth of the carburized layer, and in order to improve the depth of the carburized layer of the gear rail wheel, The method of multiple strong diffusion Carburizing is adopted and compared with the conventional primary diffusion process. The feasibility of the scheme is verified by both simulation and practical test. At the same time, the DEFORM software and the actual test are used to verify and analyze the scheme of optimizing the carbide grade of the gear rail wheel, and the carbon concentration curve at different positions of the gear rail wheel is analyzed and studied, which provides the support for the formulation of grinding technology scheme. The effects of Carburizing process on the structure, residual stress and deformation of the gear rail wheel, and the effects of different quenching temperatures on the residual stress, deformation and performance of the gear rail wheel are simulated and simulated. The above research and analysis have certain guiding significance for controlling the Carburizing quality of the gear rail wheel and improving the performance of the gear rail wheel.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG162.73

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