In:
Surface Review and Letters, World Scientific Pub Co Pte Ltd, Vol. 28, No. 04 ( 2021-04), p. 2150018-
Abstract:
Using laser cladding technology, a Ni60A alloy cladding layer added with rare earth oxides CeO 2 and Cr 3 C 2 was prepared on the surface of Cr12MoV die steel. Through scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS) analyses, the influence of CeO 2 on the microstructure, hardness and wear resistance of Ni60A–Cr 3 C 2 laser cladding layer was studied, and the mechanism of action of CeO 2 was discussed. The results show that in the laser cladding Ni60A–Cr 3 C 2 coating, after adding CeO 2 powder, the cladding layer is well formed and the microstructure is significantly refined. As the addition of CeO 2 increases, the microhardness of the cladding layer increases first and then decreases. When the addition amount of CeO 2 is 2[Formula: see text]wt.%, the microhardness of the coating is the largest, which is 1107[Formula: see text] HV. As the content of CeO 2 continues to increase, the hardness decreases. As the content of CeO 2 in the cladding layer increases, the wear loss of the sample first decreases and then increases. When the mass fraction of CeO 2 is 1[Formula: see text]wt.%, the wear loss of the cladding layer is the least and the wear resistance is the best. The wear morphology of the Ni60A[Formula: see text] +[Formula: see text]Cr 3 C 2 cladding layer without adding CeO 2 appears with a lot of abrasive debris, and the main mechanism is adhesive wear. When the addition amount of CeO 2 is 1[Formula: see text]wt.%, the wear mainly appears as furrow, which denotes abrasive wear.
Type of Medium:
Online Resource
ISSN:
0218-625X
,
1793-6667
DOI:
10.1142/S0218625X21500189
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2021
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