Investigations on Microstructures and Properties of (Fe, Cr, W)7C3 Carbides by First Principles and Experiments
Source abstract
Abstract
Tungsten doping is critical for the wear resistance and application of High-Chromium Cast Iron (HCCI). A series of investigations of (Fe, Cr, W)7C3 carbides were performed by first principles calculations and experimental analysis. The calculated results showed that with the increase in tungsten content in M7C3, the equilibrium cell volumes and the density gradually increased, and the formation energy of M7C3 carbides gradually decreased. The TEM results showed that the (Fe, Cr, W)7C3 carbides were (Fe3.27Cr2.99W0.74) C3 with a hexagonal structure after adding 2.13 wt % tungsten into laser cladding coatings of High-Chromium Cast Iron with a composition of Fe-26.8 wt % Cr-3.62 wt % C. These results from calculations and in situ nanoindentation show that tungsten doping could improve the ductility and indentation modulus of (Fe, Cr)7C3 carbides, and the composition of (Fe, Cr, W)7C3 was expected to be a high hardness and softness material. The wear test results showed that the wear resistance of tungsten-bearing HCCI was better than ordinary HCCI.
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Research context
OpenAlex topics: Metal Alloys Wear and Properties · Advanced materials and composites · Metal and Thin Film Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, China
School of Mechanical Engineering, Jiamusi University, Jiamusi 154007, China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Heilongjiang Province · Basic Scientific Research Business Fee Project of Heilongjiang Provincial Department of Education
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