基于温度场模拟的激光熔覆生物陶瓷涂层工艺参数选择  

Laser Cladding Bio-Ceramic Coating Process Parameters Selection Based on Simulation of Temperature Field

作　　者：鲍雨梅[1] 高海明[1] 张冬明[1] 许景顺 马龙[1] 

机构地区：[1]浙江工业大学特种装备制造与先近加工技术教育部/浙江省重点实验室,浙江杭州310014

出　　处：《激光与光电子学进展》2014年第11期168-178,共11页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(50975259;51275471;50375145;51105339)

摘　　要：根据激光熔覆生物陶瓷涂层的特点,选择二维带状热源模型,研究计算了材料物理性能在不同温度下的变化曲线,并建立温度场模型。将实验制备的涂层从涂层外观、显微硬度、涂层与基体的结合强度、涂层物相等方面对比模拟结果与实验结果,从而论证模型的可靠性。根据模拟结果可得:激光功率与扫描速度均会影响熔池深度,且激光功率的影响大于扫描速度;根据模拟的变化趋势分析,选择的激光熔覆的工艺参数为功率P=1700 W,扫描速度V=165 mm/min。模拟预测了不同涂层厚度、工艺参数条件下的熔池深度。Based on the characteristics of laser cladding bio- ceramic coatings, the two- dimensional ribbon heat source is chosen to study and calculate the physical properties of material′s change curves under different temperatures, and the temperature field model is established. The experimental and the simulated results of the prepared coatings are compared in terms of preparation of coatings results in simulative and coating appearance, micro- hardness, bonding strength with substrate and coating phase, which demonstrates the reliability of the model. According to the simulation results, the following conclusion is drawn： both of laser power and scanning speed will affect the depth of molten pool, but the influence of laser power is greater than that of scanning speed. Based on the change trend analysis of simulation, the laser cladding process parameters are P=1700 W, V=165 mm/min. The depth of molten pool under different coating thicknesses and process parameters is simulated and forecasted.

关 键 词：材料 生物陶瓷 工艺参数 温度场模拟 激光熔覆 

分 类 号：TN249[电子电信—物理电子学] TB39[一般工业技术—材料科学与工程]