激光选区熔化Al-Si合金组织特征及腐蚀行为研究进展  

Research Progress on Microstructure and Corrosion Behavior of Selective Laser Melted Al-Si Alloys

作　　者：郭林通 王文礼[1] 杨海鸥[2] 刘文强 Guo Lintong;Wang Wenli;Yang Haiou;Liu Wenqiang(College of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China;Institute of Engineering Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072 [3]北京科技大学工程技术研究院,北京100083

出　　处：《稀有金属材料与工程》2024年第3期870-881,共12页Rare Metal Materials and Engineering

基　　金：陕西省重点研发计划(2020GY-255)。

摘　　要：激光选区熔化(selective laser melting,SLM)制备的Al-Si合金在航空航天材料定制化和轻量化的发展中有着巨大潜力。然而,影响SLM成形件寿命的腐蚀行为研究尚有不足。本文结合当前文献报道,根据SLM过程中的凝固特征分析了冶金缺陷和微观组织的形成原因,论述了SLM制备的Al-Si合金的腐蚀机制,归纳总结了冶金缺陷、微观组织和热处理工艺对于腐蚀行为的影响。发现试样的致密度,表面状态(粗糙度)和共晶Si的含量、形态及分布对腐蚀性能有重要影响。在此基础上,指出了目前SLM工艺下Al-Si合金腐蚀研究中存在的工艺参数不够系统,忽视Mg、Fe等元素的作用,研究手段和范围不够完善等不足以及未来进一步发展的方向。Al-Si alloys prepared by selective laser melting(SLM)have great potential in the development of aerospace materials customization and lightweight.However,the research of corrosion behavior affecting the life of SLM forming parts is still insufficient.Based on current literature reports,this paper analyzed the formation reasons for metallurgical defects and microstructure according to solidification characteristics in the SLM process.The corrosion mechanism of Al-Si alloy prepared by SLM was discussed.The effects of metallurgical defects,microstructure,and heat treatment on corrosion behavior were summarized.It is found that the relative density and surface topography(roughness)of the sample,as well as content,morphology,and distribution of eutectic Si exert important effects on corrosion performance.On this basis,it is pointed out that the existing technological parameters in the corrosion research of Al-Si alloy under the SLM process are not systematic,the effects of Mg,Fe,and other elements are ignored,and the research methods and scope are not perfect,and the future development direction is also stated.

关 键 词：激光选区熔化 AL-SI合金 腐蚀行为 冶金缺陷 微观组织 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG665[金属学及工艺—金属材料]