激光选区熔化增材制造吸收率的研究进展

Research Progress on Absorptivity of Selective Laser Melting Additive Manufacturing

在研究激光选区熔化增材制造过程中材料吸收率是一个具有科学和实际意义的问题,它不仅是工艺过程精确性仿真的前提条件,而且为所选用的金属粉末材料定义一组工艺条件,使其更适合于激光选区熔化成形。本文首先介绍了激光与粉末床相互作用机理,然后总结了激光选区熔化过程中吸收率的常用测量方法,并在此基础上综述了国内外学者运用不同方法研究吸收率的进展和比较分析了各种方法的特点及测量时的注意事项。此外,重点对可能影响吸收率的因素进行了详细分类和阐述。最后就当前的研究进展及所面临的主要问题进行归纳总结,对未来吸收率的研究进行了展望。

Material absorptivity in selective laser melting additive manufacturing is a problem with scientific and practical significance.Its study is a prerequisite for simulating process accuracy and defining a set of process conditions for the selected metal powder material to make it more suitable for selective laser melting and forming.This paper introduces the interaction mechanism between the laser and powder bed.It summari-ses widely used measurement methods of absorptivity in selective laser melting and reviews the progress of different methods in absorptivity research.The characteristics of various methods and their applications are comparatively analysed,focusing on the detailed discussion of the factors that may influence absorptivity.The paper concludes with a summary of the current research progress,significant problems,and an outlook on absorptivity research.