18CrNiMo7-6合金气体渗碳模拟程序的开发及验证

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Abstract： Fick's second law is discretized using the Crank-Nicholson method toanalyze the differential scheme.We have referred to various mathematical models for the mass transfer coefficient β and the carbon diffusion coefficient D 元 A program iswritten in C# to simulate the carburization process，and the results are compared with the actual layerby-layer carbon content to identifythe mathematical modelsuitable for gas carburization of 18CrNiMo7-6 alloy，to guide the prediction of carbon content in new processes.

Keywords： numerical simulation of gas carburizing; Crank-Nicholson; mass transfer coefficient β ;carbon diffusion coefficient D ; 18CrNiMo7-6 alloy

1序言

可控气氛渗碳在钢制齿轮零件热处理或机械加工中应用广泛，而碳含量是决定齿轮最终疲劳寿命的关键因素之一。（剩余3830字）