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Effects of substrate preheating on the thin-wall part built by laser metal deposition shaping
Zhang K(张凯); Wang, Shijie; Liu WJ(刘伟军); Long RS(龙日升)
作者部门装备制造技术研究室
发表期刊Applied Surface Science
ISSN0169-4332
2014
卷号317页码:839-855
收录类别SCI ; EI
EI收录号20144400143363
WOS记录号WOS:000344379900125
产权排序2
摘要

Laser metal deposition shaping (LMDS) is a state-of-the-art technology that combines rapid prototyping and laser processing. There are many factors affecting the quality, precision, microstructure and performance of the LMDS-deposited parts. Among these factors, substrate preheating is a significant one because it can change the heat history of the LMDS process. Preheating is generally adopted to reduce the residual stresses and the risk of thermal distortion and cracking. However, it changes the heat transfer conditions and affects the final microstructure and properties. In this work a numerical simulation model was established to analyze the heat transfer characteristics between deposited material and substrate, the influence rules of substrate preheating on the thermal behavior during LMDS, and the distribution characters of temperature and stress field. And then, the experimental methods were used to evaluate the effects of substrate preheating on the surface quality, microstructure, composition, hardness distribution, and mechanical properties of as-built thin-wall parts. The experimental results primarily agree with the theoretical analysis and numerical model, which indicates that in terms of the varied thermo-mechanical coupled field, the investigated microstructure and properties of formed components depend considerably on the initial temperature of the substrate, so the LMDS process can be effectively adjusted and controlled by means of substrate preheating.

语种英语
WOS标题词Science & Technology ; Physical Sciences ; Technology
WOS类目Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
关键词[WOS]Finite-element-analysis ; Injection Mold ; Powder ; Manufacture ; Temperature ; Layer ; Steel
WOS研究方向Chemistry ; Materials Science ; Physics
引用统计
被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sia.cn/handle/173321/15273
专题装备制造技术研究室
通讯作者Zhang K(张凯)
作者单位1.School of Mechanical Engineering, Shenyang University of Technology, Shenyang, China
2.Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, China
3.Research Department, SANY Heavy Industry Co., Ltd, Shenyang, China
推荐引用方式
GB/T 7714
Zhang K,Wang, Shijie,Liu WJ,et al. Effects of substrate preheating on the thin-wall part built by laser metal deposition shaping[J]. Applied Surface Science,2014,317:839-855.
APA Zhang K,Wang, Shijie,Liu WJ,&Long RS.(2014).Effects of substrate preheating on the thin-wall part built by laser metal deposition shaping.Applied Surface Science,317,839-855.
MLA Zhang K,et al."Effects of substrate preheating on the thin-wall part built by laser metal deposition shaping".Applied Surface Science 317(2014):839-855.
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