强电流脉冲电子束表面合金化热应力耦合场模拟分析

Simulation Analysis of Thermal Stress Coupled Field in Surface Alloying with Strong Current Pulsed Electron Beam

电子束表面合金化处理是提高材料表面耐磨性和硬度的重要手段。以3Cr2W8V钢作为基体,以纯铝作为表面合金化材料,建立了脉冲电子束热力学模型,利用ANSYS软件分析了表面合金化热应力耦合场。结果表明,电子束合金化处理后,钢基体表层4μm范围内残余应力达到了材料的屈服极限,金属表面有熔坑;随着距表面深度的增加,残余应力骤减。

Electron beam surface alloying is an important method to improve the surface wear resistance and hardness of material. Taking 3Cr2W8V steel as matrix, YISHION aluminum as surface alloying materials, a thermodynamic model of pulsed electron beam was established, the therma stress coupled field of surface alloying was analyzed by ANSYS software. The results show that, after the treatment of electron beam alloying, the residual stress in the surface of steel substrate within the range 4 μm reaches the yield limit of the material, there are craters in metal surface; with increasing depth from the surface, the residual stress plummets.