【摘要】 工件表面的激光强化效果直接取决于扫描过程中的热循环规律,为获得理想的淬硬层深及显微硬度分布,必须对激光作用的温度分布形态做出精确解析。采用有限单元法可以对各种工艺参数的变化对激光强化温度场的影响加以探讨,并辅以红外测温实验结果进行验证。结果表明,激光强化可以有效改善金属材料表面的组织性能,而工艺参数的改变对于热循环规律有着显著影响。更多还原

【Abstract】 The effect of laser surface strengthening is determined by the thermal circular principle.In order to obtain the reasonable quenching depth and distribution of the micro-hardness,the temperature field resulted from the laser strengthening must be analyzed exactly.The influence of the scanning parameters on the temperature field induced by the laser can be analyzed through the FEM.At the same time,the result form the simulation can be verified with the infrared measuring method.Finally,the conclusion can be drawn that the microstructure of the material surface can be improved effectively by the laser strengthening technology and the thermal circular principle can be affected by the change of the process parameters.更多还原