摘要
激光增材制造(LAM)制备多层结构成形件的工艺过程是由单熔覆道的逐道搭接和单熔覆层的逐层堆叠形成最后的成形件。在该工艺过程中,成形件容易产生缺陷,而单熔覆道及单熔覆层的成形优劣影响了最终的多层结构成形质量。明确缺陷在多层结构搭接及堆叠成形过程中的演变规律、优化单熔覆道及单熔覆层的成形质量是多层结构成形件最终成形质量的关键所在。本文综述了LAM成形过程中多层结构的缺陷形成过程、成形质量的表征以及成形质量的调控研究,为实现多层结构成形件的良好成形提供参考和指导。
The process of laser additive manufacturing(LAM)of multi-layer structure part consists of the one-by-one overlap of single cladding channel and the layer-by-layer piling-up of single cladding layer.In this process,the forming parts are prone to defects,and the forming quality of the final multilayer structure is determined by the forming quality of single cladding channel and layer.Therefore,the key to obtaining a good final forming quality of the multi-layer structure is to clarify the evolution law of defects in the overlapping and piling-up process of multi-layer structure,and optimize the forming quality of single cladding channel and layer.In this paper,the forming process of defects in multi-layer structure,the characterization of forming quality and the regulation of forming quality in the forming process of LAM are summarized,which provides reference and guidance for the good forming of multi-layer structure part.
作者
李时春
莫彬
肖罡
苏飞
LI Shichun;MO Bin;XIAO Gang;SU Fei(Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China;Collaborative Innovation Center of Engineering Technology,Jiangxi University of Applied Science,Nanchang 330100,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2022年第10期137-145,共9页
Materials Reports
基金
湖南省自然科学基金项目(2021JJ30255,2018JJ3183)
湖南省教育厅科学研究重点项目(21A0301)。
关键词
激光增材制造
成形质量
缺陷遗传
质量表征
调控方法
laser additive manufacturing
forming quality
defect inheritance
quality characterization
regulation methods
作者简介
李时春,2014年于湖南大学获得博士学位,现为湖南科技大学副教授、博士研究生导师,主要从事激光焊接及激光增材制造技术的科研工作,发表论文30余篇,授权专利10余项。li.shi.chun@163.com。
