Research On Quality Control And Modification Of Gear Deep Carburizing

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 18Cr2Ni4 WA, 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 thegear wheel and the improvement of the performance of the gear wheel.