引用本文:郝南海,陆伟,左铁钏.激光熔覆过程热力耦合有限元温度场分析[J].中国表面工程,2004,(6):10~14
.Thermal-mechanical Coupling Finite Element Analysis of temperature field in Laser Cladding Process[J].China Surface Engineering,2004,(6):10~14
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激光熔覆过程热力耦合有限元温度场分析
郝南海,陆伟,左铁钏
作者单位
摘要:
根据激光熔覆的特点，建立了激光熔覆温度场分析模型，对送粉激光熔覆过程温度场进行了有限元分析。分析结果表明，熔覆层最高温度与激光功率、基体预热温度成正比例关系，而最大冷却速率与激光功率、基体预热温度成反比例关系。提高基体预热温度对降低熔点处材料冷却速率效果显著，而提高激光功率对降低熔点处材料冷却速率有一定作用，但效果并不明显。
关键词:  激光熔覆 温度场 有限元法
DOI：
分类号:TG156.99 TB115
基金项目:中国博士后科学基金资助项目(20040350259);教育部留学回国人员科研基金资助项目(2004527)
Thermal-mechanical Coupling Finite Element Analysis of temperature field in Laser Cladding Process
HAO Nan-hai  LU Wei  ZUO Tie-chuan
Abstract:
According to the character of laser cladding, a finite element model for analyzing the temperature field was built and the laser cladding process with powder feeding was analyzed with this model. The analysis results show that the maximum temperature of cladding layer is directly proportional to the laser power and preheated temperature. The maximum cooling rate of cladding layer is inversely proportional to them. Increasing the preheated temperature can decrease the cooling rate at melting temperature effectively. Increasing the laser power can also decrease the cooling rate at melting temperature, but the effect is not obvious.
Key words:  laser cladding,temperature field,finite element method
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