Influence of Vanadium Microalloying on Microstructure and Property of Laser-Cladded Martensitic Stainless Steel Coating
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
3.1. Phase Analysis
3.2. Microstructure Characterization
3.3. Mechanical Properties
3.4. Electrochemical Properties
4. Conclusions
- (1)
- Unique phase constitution. The V-free MSS laser-cladded coating was mainly composed of M, F, and trace M23C6 and M2N, while M23C6 and VN are promoted in the V-bearing MSS laser-cladded coatings.
- (2)
- Excellent mechanical properties. The element V could improve the mechanical properties of the MSS laser-cladded coatings by the combination of grain refining strengthening and precipitation strengthening. The microhardness and tensile strength increased firstly and then decreased with the increasing V contents. The specimen 3# with 0.5 wt% V exhibits the excellent mechanical properties, with microhardness, tensile strength (Rm), yield strength (Re) and elongation of 500.1 HV, 1756 MPa, 1375 MPa, and 11.9% respectively, superior to the laser-cladded Fe-based MSS coatings reported in the literature.
- (3)
- Better understanding corrosion resistance mechanism. A small amount of V element (0.25%) can improve the corrosion resistance of MSS coating. However, the corrosion resistance of the V-bearing coatings decreases successively with the increasing V contents over 0.25%. This is due to excessive precipitation of VN and M23C6, which partially consumed the element Cr.
Author Contributions
Funding
Conflicts of Interest
References
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Element | C | Cr | Ni | Si | Mn | V | Fe | |
---|---|---|---|---|---|---|---|---|
Specimen | ||||||||
Q235 | 0.18 | - | - | 0.26 | 0.55 | - | Bal. | |
1# (0%V) | 0.16 | 13.09 | 0.51 | 0.80 | 0.91 | 0 | Bal. | |
2# (0.25%V) | 0.16 | 13.09 | 0.51 | 0.80 | 0.91 | 0.25 | Bal. | |
3# (0.5%V) | 0.16 | 13.09 | 0.51 | 0.80 | 0.91 | 0.5 | Bal. | |
4# (1%V) | 0.16 | 13.09 | 0.51 | 0.80 | 0.91 | 1 | Bal. |
Coatings | Carbon Content/wt% | Rm/MPa | Re/MPa | Elongation/% | Treatment States |
---|---|---|---|---|---|
1# (0%V) MSS | 0.16 | 1373 ± 23 | 1106 ± 38 | 5.9 ± 0.3 | as-cladded |
2# (0.25%V) MSS | 0.16 | 1618 ± 14 | 1195 ± 52 | 10.1 ± 0.7 | as-cladded |
3# (0.5%V) MSS | 0.16 | 1756 ± 35 | 1375 ± 83 | 11.9 ± 0.5 | as-cladded |
4# (1%V) MSS | 0.16 | 1557 ± 49 | 1143 ± 60 | 13.2 ± 0.4 | as-cladded |
MSS [8] | 0.01 | 1072 | 918 | 6.3 | as-cladded |
MSS [21] | 0.19 | 1990 | 1750 | 7.3 | as-cladded |
420 MSS [25] | 0.26 | 1802 | 1306 | 6.9 | as-cladded |
420 MSS [25] | 0.26 | 1690 | 1109 | 15.8 | as-tempered |
431 MSS [29] | 0.15 | 1283 ± 16 | - | 14.5 ± 1.5 | as-heat treated |
420 MSS [30] | 0.35 | 1903 ± 34 | 1518 ± 75 | 2.7 ± 0.4 | as-cladded |
420 MSS [31] | 0.23 | 1670 ± 202 | - | 13.9 ± 2.9 | as-cladded |
Electrochemical | Corrosion Potential (SCE) Ecorr/V | Corrosion Current Density Icorr/(A·cm−2) | Corrosion Rate /(mmpy) | |
---|---|---|---|---|
Specimen | ||||
1# (0%V) | −0.36375 | 7.0021 × 10−6 | 0.08044 | |
2# (0.25%V) | −0.17458 | 3.4652 × 10−6 | 0.03369 | |
3# (0.5%V) | −0.22494 | 2.2478 × 10−4 | 2.1859 | |
4# (1%V) | −0.20589 | 2.8077 × 10−4 | 2.7302 |
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Hu, W.; Zhu, H.; Hu, J.; Li, B.; Qiu, C. Influence of Vanadium Microalloying on Microstructure and Property of Laser-Cladded Martensitic Stainless Steel Coating. Materials 2020, 13, 826. https://doi.org/10.3390/ma13040826
Hu W, Zhu H, Hu J, Li B, Qiu C. Influence of Vanadium Microalloying on Microstructure and Property of Laser-Cladded Martensitic Stainless Steel Coating. Materials. 2020; 13(4):826. https://doi.org/10.3390/ma13040826
Chicago/Turabian StyleHu, Wenfeng, Hongmei Zhu, Jipeng Hu, Baichun Li, and Changjun Qiu. 2020. "Influence of Vanadium Microalloying on Microstructure and Property of Laser-Cladded Martensitic Stainless Steel Coating" Materials 13, no. 4: 826. https://doi.org/10.3390/ma13040826