Effect of Laser Cladding Al&lt;sub&gt;3&lt;/sub&gt;Ti-Based Coatings on the Wear and Corrosion Resistances of AA6063 Aluminum Alloy

He, Hanwei; Guo, Wei; Xiao, Min; Pang, Xing; Shen, Xiao Ming; Fu, Yue; Zeng, Jian Min

doi:10.4028/www.scientific.net/amr.652-654.1897

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“…For example, high hardness, wear resistance, and high temperature resistance are required for cylinder and friction pair parts, and an aluminum alloy is difficult to apply. Therefore, improvement of the wear resistance and high temperature resistance of aluminum alloy surfaces has become an important issue [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Cladding Layers Prepared by Argon-Shielded Arc Cladding of CuZn40-WC Powders on Pure Aluminum Substrate

et al. 2018

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Aluminum and aluminum alloys have the advantage of a high strength-to-weight ratio, but their low hardness and poor wear resistance often cause wear damage. In the present study, the cladding layer was prepared using argon-shielded arc cladding of CuZn40-WC powders which were pre-coated on a pure aluminum substrate. The effects of WC proportion on the morphology, microstructure, and properties of cladding layers were investigated in detail. The results indicated that the optimal WC proportion in CuZn40-WC powders was 60 wt.%. With the increase of WC proportion, although the morphology of the cladding layer became slightly worse, the surface quality of the cladding layer was acceptable for industrial application until the WC proportion was 80 wt.%. Meanwhile, the top width and maximum depth of the cladding layer decreased. The maximum microhardness and optimal wear resistance of the cladding layer were 4.5 and 2.5 times that of the aluminum substrate, respectively. The increased microhardness and wear resistance were mainly attributed to the formation of Al4W in the cladding layer. The wear scar of the high wear resistance specimen was smoother and some bulk Al4W compounds were clearly observed on the wear surface.

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Section: Introductionmentioning

confidence: 99%