摘要
建立了包括平面、圆柱面和球面在内的统一的气体渗碳数学模型 :Cτ=D(2 Cx2 +shape(x -R0 )Cx) ,并将碳的扩散系数作为温度和含碳量的函数表示为D =D0 .4 exp(-Q/RT -BC(0 .4 -C) ) ;将碳的传递系数作为温度的函数表示为 β =β0 exp(-E/RT) ;内边界条件为含碳量是固定值 ;碳势和温度视为时间的线性函数。结合按此模型的模拟计算 ,讨论了表面形状、扩散系数和传递系数中有关参数对碳浓度分布的影响规律。
The models established in this paper for gas carburizing of plan,cylinder and ball are given byCτ=D( 2Cx 2+shape(x-R 0)Cx),in which carbon diffusivity (D) is defined as function of temperature (T) and carbon consistence (C),i.e.D=D 0.4exp(-Q/RT-B C(0.4-C)),carbon transfer coefficient is expressed as a function of temperature,β=β 0exp(-E/RT)and carbon potential and temperature as linear functions of time.The influences of carbon diffusivity and carbon transfer coefficient on carbon distribution are discussed according to the results of simulating.
出处
《河南科技大学学报（自然科学版）》
CAS
2003年第1期26-29,共4页
Journal of Henan University of Science And Technology:Natural Science
