摘要
在金属淬火过程的数值模拟中,换热系数的正确求解是保证工件温度场以及应力/应变场模拟结果与实际情况相符合的先决条件。据此研究和分析了换热系数反求法的数学模型,采用二维圆柱坐标有限元法对该数学模型求解,并考虑了换热面对换热系数的影响,求出了圆柱侧面和下端面的换热系数。研究发现,换热面的空间方位对换热系数有较大的影响。和圆柱体的侧面相比,底面的换热变化规律相同,但是换热条件不佳,换热系数较小。用求得的换热曲线模拟大尺寸工件的淬火过程,发现考虑换热面对换热系数的影响后,其计算的温度分布明显不同。
In numerical simulation of metal quenching process, get the correct solution of heat transfer coefficient is the precondition of simulation of temperature field and stress/strain field. In this paper, a mathematica/mode of Inverse problem of Heat Conduct Equation is analyzed, and a solution of it by 2D shaft symmetrical Finite Element Method （FEM） is presented. The influence of surface to heat exchange coefficient is considered in this paper and get the heat transform coefficient of lower surface and side surface. The study find the space angle of surface have great influence on heat exchange coefficient.
出处
《热处理技术与装备》
2007年第3期15-19,共5页
Heat Treatment Technology and Equipment
基金
广东省科技计划项目(2003C102042)
关键词
淬火
换热系数
有限元
quenching
surface heat transfer coefficient
finite element method
