期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 244, 期 -, 页码 215-224出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2017.01.024
关键词
GMAW based additive manufacturing; Thermal analysis; Infrared thermography; Inter-layer cooling time
资金
- National Natural Science Foundation of China [51575133]
An infrared camera after calibration test was used to capture the surface temperature of the deposited thin-wall parts for investigating the thermal behavior of gas metal arc welding (GMAW) based additive manufacturing (AM). The temperature field cloud pictures indicated that as the deposition height increased, the heat accumulation of the deposited parts became serious. Through extendirig the inter layer cooling time, the high temperature area and the mean temperature of the thin-wall part decreased while the temperature gradient and cooling rate of the deposited part increased. But excessive inter layer cooling time cannot reduce heat accumulation of the deposited parts effectively and will make the deposition process time-consuming. The comparison of the final parts in forming appearance with different inter-layer cooling time indicated that the moderate prolongation of inter-layer cooling time contributed to improvement of the surface quality and reduction of the total height difference. Using the alternate inter-layer cooling time can improve the forming quality of the thin-wall part distinctly with a little increase of the deposition time in GMAW based AM. (C) 2017 Elsevier B.V. All rights reserved.
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