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Low-Temperature Plasma Nitriding of 3Cr13 Steel Accelerated by Rare-Earth Block
| Content Provider | MDPI |
|---|---|
| Author | You, Yuan Li, Rui Yan, Mufu Yan, Jihong Chen, Hongtao Wang, Chaohui Liu, Dongjing Hong, Lin Han, Tingjie |
| Copyright Year | 2021 |
| Description | The plasma nitriding of 3Cr13 steel occurred at 450 °C for 4, 8 and 12 h in $NH_{3}$ with and without rare earth (RE). The nitrided layers were characterized using an OM, SEM, TEM, XRD, XPS, microhardness tester and electrochemical workstation. The modified layer, with and without La, are composed of a compound layer and diffusion layer from surface to core. After the addition of La during nitriding, the maximum increase of layer thickness, mass gain and average microhardness was 15.6%, 35.8% and $212.50HV_{0.05}$, respectively. With the increase of the proportion of $ε-Fe_{2-}$3N, the passivation zone of the corrosion resistance curve increases from 2.436 to 3.969 V, the corrosion current density decreases, the corrosion potential and pitting potential both increase, and, consequently, the corrosion resistance is significantly improved. Most of the surface microstructures of the nitrided layer was refined by the addition of La. The presence of La reduces the N content in the modified layer, which accelerates the diffusion of N atoms and, thus, accelerates the nitriding process. |
| Starting Page | 1050 |
| e-ISSN | 20796412 |
| DOI | 10.3390/coatings11091050 |
| Journal | Coatings |
| Issue Number | 9 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-08-31 |
| Access Restriction | Open |
| Subject Keyword | Coatings 3cr13 Steel Plasma Nitriding Microstructure Microhardness Corrosion Resistance |
| Content Type | Text |
| Resource Type | Article |
