Particle Property Impact on its Distribution During Laser Deep Alloying Processes
Particle Property Impact on its Distribution During Laser Deep Alloying Processes
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DOI：
10.1016/j.phpro.2014.08.022
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
J. Volpp;T. Dietz;F. Vollertsen
中科院分区：
文献类型：
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作者：
J. Volpp;T. Dietz;F. Vollertsen
激光深合金化技术是近年来发展起来的一种表面合金化技术。为此，高度聚焦的激光束被引导到材料表面上，产生宽而深的熔池。使用粉末喷嘴将合金颗粒作为粉末施加。该过程允许颗粒的深度合金化和分散。当使用具有不同热物理性质的颗粒时，颗粒在熔池中的均匀性和穿透深度不同。因此，在这项工作中，粒子的性质，进给速度和调制策略的激光对所产生的分布在熔池中的影响进行了研究。调制策略和进料速率对所观察到的参数场内的颗粒分布具有较小的影响。颗粒的进入和分布主要取决于其密度和与铝的润湿行为。已发现使用TiB2颗粒的最均匀的分布。
Alloying of surface layers could be recently improved by using the laser deep alloying process. For this, a highly focused laser beam is guided on the material surface producing a wide and deep melt pool. Alloying particles are applied as a powder using a powder nozzle. This process allows deep alloying and dispersing of particles. The homogeneity and the penetration depth of the particles in the melt pool vary when using particles with different thermo-physical properties. Therefore, the influence of particle properties, feeding rates and modulation strategies of the laser on the resulting distribution in the weld pool is studied in this work. The modulation strategy and the feeding rate have a minor impact on particle distribution within the observed parameter field. Particle entering and distribution depend mainly on its density and wetting behavior with aluminum. Most homogeneous distribution has been found using TiB2-particles.