摘要
利用JMatPro软件,计算了不同渗碳量的15CrMo钢淬火组织相组成,热物理、力学性能参数,CCT曲线及端淬性。结果表明:淬火组织中渗碳体含量随渗碳量的增大而增多,奥氏体化温度随碳含量的增多而降低。在相同温度下,线膨胀系数、热导率、泊松比和密度随渗碳量的增大而减小;相反,比热容和杨氏模量随渗碳量的增大而增大。珠光体、贝氏体、铁素体和马氏体的转变温度均随渗碳量的增加而降低;屈服强度、抗拉强度和洛氏硬度随渗碳量的增大而增大;随距离淬火端面距离的增大,屈服强度、抗拉强度和洛氏硬度明显呈梯度形式递减。
The phase composition, thermal physical and mechanical properties, CCT curve and Jominy harden-ability for quenched 15CrMo steel with different C content were simulated by using JMatPro sottware. The results show that the cementite contents of quenched structure increase with the increase of carburization amount, but the austenitizing temperature decreases with the increase of the C content. At the same temperature, the linear expansion coefficient, thermal conductivity, Poisson＇s ratio and density decrease with the increase of caburization amount. While the specific heat capacity and Young＇s modulus increase with the increase of carburization amount. Moreover, the transition temperature of pearlite, bainite, ferrite and martensite reduces with the increase of C content, and the yield strength, tensile strength, rockwell hardness increase with the increase of carburization amount. In addition, with the distance increasing away from the quenching end, the yield strength, tensile strength and rockwell hardness decrease significantly in gradient forms.
出处
《热加工工艺》
CSCD
北大核心
2013年第20期184-187,共4页
Hot Working Technology
