Microstructure and Wear Resistance of Fe-Cr-Mo-Co-C-B Amorphous Composite Coatings Synthesized by Laser Cladding
Abstract
:1. Introduction
2. Experimental
2.1. Laser Cladding Process
2.2. Phase and Microstructure Analysis
2.3. Microhardness and Wear Tests
3. Results and Discussion
3.1. Phase and Microstructure
3.2. Microhardness
3.3. Wear Resistance
4. Conclusions
- (1)
- The cladding layer is composed of a featureless amorphous phase in the upper part and a columnar crystal region at the bottom part. The crystalline phases include carbides , , and solid solution , and the volume fraction of the amorphous phase is calculated to be 52.8%. Significant elemental dilution occurs in the crystallization region, which resulted in the crystallization.
- (2)
- The highest hardness of the cladding layer is 1200 , which is about 6 times of that of the 3Cr13 stainless steel substrate (200 ).
- (3)
- The cladding layer have a much better wear resistance than the substrate: the friction coefficient of the laser cladding (0.11) is much lower than that of substrate (0.29), and the wear volume loss of the cladding layer is only about one fourth of that of the 3Cr13 substrate.
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Element | C | Cr | Ni | Si | Mn | P | S | Fe |
---|---|---|---|---|---|---|---|---|
wt. % | 0.26~0.35 | 12.00~14.00 | ≤0.60 | ≤1.00 | ≤1.00 | ≤0.035 | ≤0.03 | Bal. |
Laser Power (W) | Scanning Speed (mm/min) | Powder Feeding Rate (g/min) | Overlapping Rate (%) |
---|---|---|---|
500 | 600 | 10 | 30 |
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Hou, X.; Du, D.; Wang, K.; Hong, Y.; Chang, B. Microstructure and Wear Resistance of Fe-Cr-Mo-Co-C-B Amorphous Composite Coatings Synthesized by Laser Cladding. Metals 2018, 8, 622. https://doi.org/10.3390/met8080622
Hou X, Du D, Wang K, Hong Y, Chang B. Microstructure and Wear Resistance of Fe-Cr-Mo-Co-C-B Amorphous Composite Coatings Synthesized by Laser Cladding. Metals. 2018; 8(8):622. https://doi.org/10.3390/met8080622
Chicago/Turabian StyleHou, Xiangchun, Dong Du, Kaiming Wang, Yuxiang Hong, and Baohua Chang. 2018. "Microstructure and Wear Resistance of Fe-Cr-Mo-Co-C-B Amorphous Composite Coatings Synthesized by Laser Cladding" Metals 8, no. 8: 622. https://doi.org/10.3390/met8080622