选区激光熔化成形铝合金的主要缺陷及调控方法

被引：5
作者：
张双雷
王建宏
李晓峰
丁芳
杨玉荣
闫浩
张锦芳
刘斌
白培康
机构：
[1] 中北大学材料科学与工程学院
来源：
中国材料进展 | 2021年 / 40卷 / 04期
关键词：
铝合金; 选区激光熔化; 热裂纹; 孔隙; 微合金化;
D O I：
暂无
中图分类号：
TG665 [光能加工设备及其加工]; TG146.21 [];
学科分类号：
080201 ; 080502 ;
摘要：
高性能铝合金因轻质、高强、耐腐蚀等特点,在航空航天、车辆工程和海洋工程等领域应用前景广阔。然而,随着铝合金零部件形状和结构越来越复杂,传统成形方式难以满足需求。选区激光熔化(SLM)技术具有一体化成形复杂形状和精密零件的能力,因此在铝合金成形方面具有极大的发展潜力。但是,铝合金具有宽的结晶温度区间、高的激光反射率和热导率等特性,在SLM成形过程中易产生缺陷,从而使成形件的力学性能下降。近年来,为解决此问题,研究者们做了众多工作并取得了一定的进展。基于此,介绍了SLM成形铝合金存在的主要缺陷及其成形机理。从工艺优化与微合金化两个角度出发,总结了不同牌号铝合金的SLM成形缺陷的调控方法,并对SLM成形铝合金的发展进行了总结与展望。
引用
收藏
页码：267 / 274
页数：8
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