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送粉激光熔覆中送粉速率對激光束與粉末流相互作用的影響
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TG174.445

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Supported by the National Nature Science Foundation of China （50271051）


Effect of Powder Feeding Rate on Interaction between Laser Beam and Powder Stream in Laser Cladding Process
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    摘要:

    引入經(jīng)典光學(xué)理論計算激光束與粉末流的相互作用，藉此研究了送粉速率對工件表面激光強度分布和不同位置顆粒溫度的影響。計算結(jié)果表明：隨送粉速率的增加，激光強度以及顆粒溫度的最高值都顯著降低：同時，激光強度分布和不同位置顆粒溫度趨于均勻。由于對激光熔池中動力學(xué)過程的潛在影響，這些結(jié)果應(yīng)在描述激光熔覆過程的數(shù)學(xué)模型中加以考慮。

    Abstract:

    The classical optical theory was introduced to calculate the interaction between laser beam and powder stream, on the basis of which the effect of powder feeding rate on the laser intensity and temperature of the particles at different sites on the surface of the workpiece was investigated. It is shown that the peak values of both laser intensity and particle temperature decrease with increasing the powder feeding rate. And simultaneously, the laser intensity distribution and the temperature of the particles at different sites on the surface of the workpiece tend to be even. It is suggested that such results should be considered in model of laser cladding due to their subtle effects on the dynamic processes in laser molten pool.

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黃延祿 李建國 梁工英 蘇俊義.送粉激光熔覆中送粉速率對激光束與粉末流相互作用的影響[J].稀有金屬材料與工程,2005,34(10):1520~1523.[Huang Yanlu, Li Jianguo, Liang Gongying, Su Junyi. Effect of Powder Feeding Rate on Interaction between Laser Beam and Powder Stream in Laser Cladding Process[J]. Rare Metal Materials and Engineering,2005,34(10):1520~1523.]
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  • 收稿日期:2003-05-12
  • 最后修改日期:2004-12-08
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