Chinese Journal of Lasers, Volume. 42, Issue 3, 306001(2015)
Laser Cladding Ni/Ni3Al Based Double Performance Materials and Internal Microstructure Analysis
Ni/Ni3Al double performance coatings with good metallurgical quality are obtained through optimizing the process parameters and using multi-laser cladding. Double performance materials crack-sensitivity can be reduced effectively by changing the laser processing parameters. The generation and mechanism of cracks in the laser processing are investigated. The microstructure, composition and phase constitution of the coatings are characterized using scaming electron microscope (SEM), X-ray diffrcaction (XRD), respectively. The results reveal that small amount phases of Al8Cr5 and Al4CrNi15 are precipitated in the single clad coating due to the dilution of Nibased alloy. Additionally, a single Ni3Al phase is produced in the coating by means of multilayer cladding, which can keep good properties of Ni3Al-based materials and perform the characteristics of double-properties materials more sufficiently. The micro-hardness testing of the coatings show that the double-properties material is able to maintain high hardness even under higher temperature.
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Yang Jiaoxi, Wang Yanfang, Wang Zhicheng. Laser Cladding Ni/Ni3Al Based Double Performance Materials and Internal Microstructure Analysis[J]. Chinese Journal of Lasers, 2015, 42(3): 306001
Category: laser manufacturing
Received: Sep. 1, 2014
Accepted: --
Published Online: Feb. 5, 2015
The Author Email: Jiaoxi Yang (yangjiaoxi@bjut.edu.cn)