期刊
SURFACE & COATINGS TECHNOLOGY
卷 371, 期 -, 页码 161-171出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2018.03.072
关键词
Cold spraying; Selective laser melting; WC; Maraging steel 300; Microstructure; Tribological behavior
资金
- China Scholarship Council [201504490031]
- Guangdong Provincial Science and Technology Department, International Cooperation Base Construction Project China-France Modern Material Surface Engineering Technology International Cooperation Base Construction [2014B050502008]
- Guangzhou Science and Technology Innovation Committee, Production and Research Collaborative Innovation Major Projects of Foreign Cooperation Projects, Research and Application of Laser 3D Printing Die-Casting Mold Technology [2016201604030028]
- Guangdong Provincial Science and Technology Department, Provincial Scientific Research Institutions Reform and Innovation Projects, Laser 3D Printing Technology and Application of Innovative Research Team Building [2016B070701020]
- Zhongshan Science and Technology Bureau, Zhongshan City-Guangdong Province Science Institute of Technical Transfer Special Funds Project, Study on Industrial Application of Laser 3D Printing Type Cooling Injection Mold [2016G1FC0004]
- Guangdong Provincial Science and Technology Department, Research Platform Environment and Capacity Building Special Fund Project, China-UK Joint Manufacturing Technology Research Center-3D Printing Technology Innovation Platform [2016GDASPT-03102]
- Guangdong Provincial Science and Technology Department Research Platform Environment and Capacity Building Projects of Special Funds, Modern Materials Surface Engineering Technology National Engineering Laboratory Scientific Research Platform to Enhance [2016GDSPT-0206]
Till now, additive manufacturing (AM) technologies based on different principles have been widely applied to produce metal matrix composites (MMCs). In this study, AM technologies of cold spraying additive manufacturing (CSAM) and selective laser melting (SLM) were used to manufacture maraging steel 300 (MS300) composite reinforced by WC particles. The results show that the SLM composite possesses a relatively higher densification rate and a lower porosity than that of the CSAM composite. Dry sliding wear test and micro hardness measurements were performed to characterize the mechanical properties. The CSAM composite possesses a slightly higher microhardness value than that of the SLM composite. However, the SLM composite shows a significantly lower wear rate than that of the CSAM composite, presenting a stable evolution of the friction coefficient and a worn morphology without obvious scratches. However, these differences in the mechanical properties can be contributed to the distinct evolution features of the WC reinforcement particle during these two AM processes. Through understanding the composite formation mechanisms and the WC evolution, it is possible to provide a guidance for application of the different AM technologies for preparation of MMCs.
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