Hongyu Zhang, Min Yu, Junwei Hua, Hui Chen. Effects of Mo on Microstructure and Properties of Fe-Cr-Mo Laser Cladding Layer[J]. Chinese Journal of Lasers, 2021, 48(22): 2202010
- Chinese Journal of Lasers
- Vol. 48, Issue 22, 2202010 (2021)
Fig. 1. SEM morphology of Fe-Cr-Mo powder
Fig. 2. Micro-shear test. (a) Schematic of the test; (b) size of the sample
Fig. 3. XRD patterns of cladding layers. (a) Fe-Cr cladding layer; (b) Fe-Cr+10%Mo cladding layer; (c) Fe-Cr+30%Mo cladding layer; (d) Fe-Cr+50%Mo cladding layer; (e) Fe-Cr+70%Mo cladding layer; (f) movement of diffraction peaks
Fig. 4. Cross-sectional microstructures of Fe-Cr cladding layer. (a) Cladding zone; (b) SEM morphology of cladding layer; (c) fusion zone
Fig. 5. SEM images of four Fe-Cr-Mo cladding layers. (a) Fe-Cr+10%Mo cladding layer; (b) Fe-Cr+30%Mo cladding layer; (c) Fe-Cr+50%Mo cladding layer; (d) Fe-Cr+70%Mo cladding layer
Fig. 6. Hardness of cladding layer. (a) Average hardness of each cladding layer; (b) evolution of hardness from cladding layer to substrate
Fig. 7. Micro-shear test results of four cladding layers. (a) Fe-Cr cladding layer; (b) Fe-Cr+10%Mo cladding layer; (c) Fe-Cr+30%Mo cladding layer; (d) Fe-Cr+50%Mo cladding layer
Fig. 8. Shear properties of cladding layer with different Mo contents. (a) Shear strength; (b) shear toughness; (c) ratio of pressure
Fig. 9. Shear fracture morphologies of cladding layers with different Mo contents. (a) Fe-Cr cladding layer; (b) Fe-Cr+10%Mo cladding layer; (c) Fe-Cr+30%Mo cladding layer; (d) Fe-Cr+50%Mo cladding layer
Fig. 10. Friction coefficient curves of substrate and cladding layers with different Mo contents. (a) Substrate; (b) Fe-Cr cladding layer; (c) Fe-Cr+10%Mo cladding layer; (d) Fe-Cr+30%Mo cladding layer; (e) Fe-Cr+50%Mo cladding layer
Fig. 11. XRD test results of wear debris of substrate and cladding layers samples
Fig. 12. Friction and wear test results. (a) Wear volume;(b) average friction coefficient
Fig. 13. Worn surface morphologies of substrate and cladding layer with different Mo contents. (a) Substrate; (b) Fe-Cr cladding layer; (c) Fe-Cr+10%Mo cladding layer; (d) Fe-Cr+30%Mo cladding layer; (e) Fe-Cr+50%Mo cladding layer
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Table 1. Chemical composition of base material
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Table 2. Chemical composition of Fe-Cr alloy powder
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Table 3. Laser cladding parameters
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Table 4. Chemical composition of R7 wheel steel
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Table 5. Chemical composition of four Fe-Cr-Mo cladding layers
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Table 6. Chemical composition of eight test points in Fig.5
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Table 7. Hardness gradient damage of laser cladding samples
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