高温自润滑材料电磁感应熔渗加热过程数值分析  

Numerical Analysis on Heating Process of Electromagnetic Induction Infiltration for High-temperature Self-lubricating Materials

作　　者：张一兵[1] 夏元烽[1] 燕松山[1] 

机构地区：[1]武汉理工大学摩擦学研究所,湖北武汉430070

出　　处：《润滑与密封》2010年第4期19-23,32,共6页Lubrication Engineering

基　　金：国家自然科学基金项目(50775168)

摘　　要：为制备具有优良高温自润滑性能的材料,基于电磁感应加热特点的理论分析,对应用电磁感应加热方式,驱使润滑材料向烧结基体材料孔隙中熔渗的加热过程,建立了电磁场与温度场的耦合分析模型。采用多场耦合的有限元方法,对感应加热过程中的磁场和温度场进行了瞬态仿真,研究了不同的电流密度和频率对磁场和温度场分布的影响。结果表明,通过选择合适的电流密度与频率组合进行加热,可获得有利于润滑材料熔渗的加热温度与温度梯度场,从而有助于不同自润滑材料电磁感应熔渗工艺参数的选择。To produce serf-lubricating materials with excellent properties of high temperature, based on the theoretical analysis of electromagnetic induction heating, a couple field model of electromagnetic and temperature was established. The model was used for analyzing the infiltrating process of driving lubricants into the sintering matrix pores, and the infiltrating process used a manner of electromagnetic induction heating. Using the multi-field coupled finite element method, the transient fields of magnetic and temperature in the process of induction heating were simulated. The effects on electromagnetic field and temperature field distributions, which were produced by different electric current density and frequency, were studied. The results show, through an appropriate combination of current density and frequency, the preferential heating temperature and temperature gradient filed of lubricant infiltration can be formed, which will help to select the parameters of electromagnetic induction infiltration technique for different self-lubricating materials.

关 键 词：感应熔渗 多场耦合 高温 自润滑 

分 类 号：TH117[机械工程—机械设计及理论]