Microstructural Evolution of NiCrBSi Coatings Fabricated by Stationary Local Induction Cladding

Journal Article · Tue May 15 04:00:00 EDT 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-018-3344-4· OSTI ID:22860504

Chen, Xuliang; Qin, Xunpeng; Gao, Kai; Zhu, Zhenhua; Huang, Feng ^[1]

---

1. Wuhan University of Technology, Hubei Key Laboratory of Advanced Technology for Automotive Components (China)

The development of induction cladding has been restricted by the complicated geometric characteristics of workpieces and the large heat-affected zone in the cladded workpieces. In this paper, three-dimensional continual local induction cladding (3D-CLIC) was proposed as a potential process to clad coating over a substrate with curved surface, and a stationary local induction cladding (SLIC) experiment was conducted as an exploratory study of 3D-CLIC. The microstructures and microhardness in the coatings were measured by SEM, EDS, XRD and microsclerometer, respectively. The results indicate that the coating is metallurgically bonded with the substrate without any defects. A compositional gradient exists in the diffusion transfer belt (DTB), and it decreases with the increase in induction heating time. The coating is mainly composed of (Fe, Ni), CrB, M{sub 7}C{sub 3}, Ni{sub 3}B, Ni{sub 3}Si and M{sub 23}C{sub 6} (M = Cr, Ni, Fe). Among the carbides, M{sub 7}C{sub 3} presents several morphologies and M{sub 23}C{sub 6} is always attached to the DTB. A special phenomenon of texture was found in the SLIC coatings. The preferred orientation in (200) crystal plane or the restrained orientation in (111) (200) crystal plane becomes more obvious as the scanning speed increases. The maximum average microhardness is 721 HV when the coating is heated for 5 s. The wear loss of different samples increases with increasing induction heating time. The longer heating time would result in higher dilution in the SLIC coatings due to the complete mixing with the substrate, thus leading to the decrease in microhardness and wear loss.

• OSTI ID: 22860504
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 5 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORIDES
BORON COMPOUNDS
CARBIDES
CHROMIUM COMPOUNDS
COATINGS
CRYSTALS
DIFFUSION
DILUTION
GRAIN ORIENTATION
HEAT AFFECTED ZONE
HEATING
MICROHARDNESS
NICKEL COMPOUNDS
SCANNING ELECTRON MICROSCOPY
SILICON COMPOUNDS
SUBSTRATES
SURFACES
THREE-DIMENSIONAL CALCULATIONS
THREE-DIMENSIONAL LATTICES
X-RAY DIFFRACTION