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同轴送粉激光成形中粉末与激光的相互作用
Authors
席明哲
张永忠
石力开
虞钢
Publication date
1 January 2005
Publisher
Abstract
详细介绍了同轴送粉激光成形过程中,金属粉末与激光束相互作用时间的计算方法。在ANSYS软件平台上,建立了金属粉末穿越激光束过程中粉末温度场的计算模型。系统计算了不同颗粒大小316L不锈钢粉末与不同功率激光束相互作用后的温度。在此基础上,计算了金属粉末与激光束的能量交换及金属粉末落入激光熔池后与激光熔池的能量交换。计算结果表明,在激光束直径为3mm条件下,316L不锈钢粉末穿过功率大于1000W的激光束后,所有尺寸金属粉末均被熔化,即金属粉末以液态进入激光熔池。通过金属粉末与激光束及激光熔池的能量交换计算,可知在激光成形中,约有5%的激光能量用于加热和熔化粉末,而大约95%的激光能量用于激光熔池的形成及由于热传导造成的热量损失
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Institute Of Mechanics,Chinese Academy of Sciences
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Last time updated on 25/11/2020