磁场淬火过程应力场的数值模拟  

Numerical Simulation of Thermal Stress Fields During Magnetic Quenching

作　　者：李自良[1] 程赫明[1] 陈君若[1] 刘美红[1] 魏镜弢[1] 

机构地区：[1]昆明理工大学机电工程学院,昆明云南650093

出　　处：《金属热处理》2005年第C00期140-143,共4页Heat Treatment of Metals

基　　金：国家自然科学基金项目（10162002）

摘　　要：本文从热非弹性理论、计算力学、铁磁学和相变理论出发，在分析温度、相变、应力之间相互耦合关系的基础上，讨论了相变条件的数学模型和铁磁材料热物理性能改变的方程，建立了磁场淬火时包含相变的热弹塑性本构方程。在前期已求得的45钢圆柱体试件在热、磁耦合条件下瞬态温度场分布的基础上，用有限元法求得了瞬态热应力和残余热应力，并就磁场对热应力的影响进行了讨论。In this paper, based on the analysis of coupling action of temperature, phase transformation, magnetic field and stress, The phase transformation condition and equation related to the physical properties of ferromagnetic material are discussed, and the transient temperature distribution of a 45 steel cylinder workpiece during magnetic quenching was obtained by solving the governing equations with nonlinear boundary on the condition of coupling effects of heat-magnetism. According to the theory of thermal non-elasticity, computational mechanics, ferromagnetism and phase transformation, a new constitutive equation considering effects of phase transformation is proposed and solved by means of Finite Element Method （F.E.M）. The transient thermal stress and residual stress are obtained and the influencing factors on the thermal stress of magnetic field are analyzed and discussed.

关 键 词：数值模拟 热应力 磁场淬火 有限元法 

分 类 号：TG156.3[金属学及工艺—热处理]