Characterization on Laser Melting Deposition of Metallic Components  

作　　者：Zhang Yongzhong1, Shi Likai1, Li Guowei2, Xi Mingzhe3 1 General Research Institute for Non-ferrous Metals, Beijing 100088, China 2 Nantong Entry-Exit Inspection and Quarantine Bureau, Nantong 226005, China 3 Yanshan University, Qinhuangdao 066004, China 

出　　处：《稀有金属材料与工程》2011年第S3期27-32,共6页Rare Metal Materials and Engineering

基　　金：National Key Basic Research Program (2006CB605206);National Nature Science Foundation of China (50871022)

摘　　要：Laser melting deposition process (LMD) is an advanced computer-aided laser additive manufacturing process (LAM). This process can produce net-shape components with fully dense microstructure and good properties based on a computer aided design (CAD) model by using a high power laser to melt the injected powders and re-solidify them in a layered way. It presents obvious superiority in direct manufacturing components with small-lot, repairing high-value components with good performance, and integrated fabricating new materials and composite structure. Deep understanding the melting process, alloying and reaction within the molten pool, solidification behavior, as well as formation and control of residual stress and defects during deposition are crucial to successful application.Laser melting deposition process (LMD) is an advanced computer-aided laser additive manufacturing process (LAM). This process can produce net-shape components with fully dense microstructure and good properties based on a computer aided design (CAD) model by using a high power laser to melt the injected powders and re-solidify them in a layered way. It presents obvious superiority in direct manufacturing components with small-lot, repairing high-value components with good performance, and integrated fabricating new materials and composite structure. Deep understanding the melting process, alloying and reaction within the molten pool, solidification behavior, as well as formation and control of residual stress and defects during deposition are crucial to successful application.

关 键 词：laser MELTING DEPOSITION SOLIDIFIED microstructure RESIDUAL stress DEFECTS interface flexible manufacturing 

分 类 号：TG174.4[金属学及工艺—金属表面处理]