球墨铸铁激光相变硬化深度与宽度的数值计算  

Numerical calculation of depth and width of laser-hardened band for nodular cast iron

作　　者：刘继常[1,2] 罗旦[2] 许阳辉[2] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]湖南大学先进成形与表面工程研究所,湖南长沙410082

出　　处：《材料热处理学报》2013年第12期183-187,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51075134)

摘　　要：采用ANSYS软件建立了球墨铸铁QT600-3激光相变硬化温度场的三维数值模拟模型,计算了激光束扫描过程中工件的温度场,得到了沿工件硬化层宽度和深度方向不同的点的温度随时间变化的曲线,发现随着与光斑中心之间的距离增大,各点可以达到的最高温度下降,并在此基础上对硬化层的深度和宽度进行了预测。光纤耦合输出的半导体激光表面淬火试验表明,用ANSYS软件对激光硬化层深度和宽度的计算结果与试验结果基本吻合,两者变化趋于一致。A 3D numerical model of laser transformation hardening of nodular cast iron QT600-3 was developed with an ANSYS software. The temperature field of the work-piece during laser hardening was computed with is model and the curves of temperature at different points of the hardened layers vs. time were obtained . It is found that the maximum temperature of these points decreases with increasing the distance of the points to the center of the laser spot. Based on the calculated temperature field, the width and depth of the hardened band are predicted. In the presented experiment, a LDF3000-600 diode laser unit is used and the experimental results agree well with the values calculated using the developed model.

关 键 词：激光相变硬化 球墨铸铁 数值计算 硬化层深度 硬化层宽度 

分 类 号：TG156.33[金属学及工艺—热处理] O242.1[金属学及工艺—金属学]