激光增材制造技术常用金属材料激光吸收率测量

应用反射率测量装置对几种激光金属增材制造技术常用金属粉末和金属板材的激光吸收率进行间接测量。对比不同粒度、球形度金属粉末激光吸收率的大小;测量金属粉末和金属板材分别对1064nm红外激光和532nm绿光激光的吸收率大小。测量结果表明,粉末的球形度越好、粒径越大,粉末对激光吸收率越高;金属粉末和金属板材对1064nm激光的吸收率小于532nm激光的吸收率。测量结果可为这些金属材料的激光增材制造提供试验数据基础。

Measurement of Laser Light Absorptivity of Commonly Used Metals in Laser Additive Manufacturing Technique

Indirect measurement is conducted with a reflectivity measurement device to determine the laser light absorptivity of the commonly used metal powders and metals bulks in laser additive manufacturing technique. The effects of the size and the shape of metal powders on the laser light absorptivity are investigated, and the laser light absorptivity of metal powders and metal bulks to 1064nm laser light and 532nm laser light is measured respectively. The measurement results show that powders with better sphericity and bigger particle sizes exhibit higher laser light absorptivity, and the laser light absorptivity of metal powders and metal bulks to the 532nm laser light is greater than to the 1064nm laser light. The measurement results can provide basic experimental data for the laser additive manufacturing of these metals.