Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 745, Issue -, Pages 483-489Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.02.165
Keywords
Bimodal microstructure; Composition design; Laser cladding; Composite coating
Categories
Funding
- National Natural Science Foundation of China [51402189, 11604204]
- Shanghai Local Universities Capacity Building Project of Science and Technology Innovation Action Program [16030501100]
Ask authors/readers for more resources
The AlSiTiNi composite coatings were prepared on the surface of the 304 stainless steel by laser cladding. The results showed that a good metallurgical combination was found at the bonding area between the coating and the substrate. For the Al and Ti powders with different content, the bimodal microstructure was shown in all the coatings. However, the microstructure of the coating with a composition of 50%Al-20%Ti was more compact, and it was mainly composed of equiaxed crystal in the partially melted region and net-like structure in the fully melted region, while the partially melted region was embedded in the fully melted region. In addition, the phases of AlFe, FeNi and Al5Cr were found in the coating. The highest micro-hardness of the coatings with the composition of 40%Al-30%Ti and 60%Al-10%Ti were 532.3 HV0.2 and 556.8 HV0.2, respectively. The highest micro-hardness of the coating with the composition of 50%Al-20%Ti has been increased to 758.5 HV0.2, which was 3.4 times that of the substrate (223.2HV(0.2)). Furthermore, the coating possesses low friction coefficient and high wear resistance. For the coatings with different contents, the 5A2T coating possesses the shortest the running-in period and the smallest wear loss. (C) 2018 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available