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| Content Provider | Springer Nature Link |
|---|---|
| Author | Hald, John |
| Copyright Year | 2016 |
| Abstract | Creep strength improvements of martensitic 9 % Cr steels have been obtained by controlled additions of V, Nb, N and B to the steels, which resulted in precipitation hardening by fine stable nitrides based on V and Nb as well as in stabilization of Cr carbides against coarsening. The best steels P92 and FB2 are now used in power plants up to 600–620 °C steam temperature. For higher steam temperatures up to 650 °C steels with 11–12 % Cr are needed for better resistance against steam oxidation. However, fine V and Nb based nitrides may transform to coarse Z-phase [Cr(V,Nb)N] nitrides in steels with such Cr contents, leading to a strength loss in long-term creep. The paper presents the status of development of new stable 12 Cr steels based on the concepts of either strengthening by fine Z-phase nitrides or on elimination of nitrides from the steels. |
| Starting Page | 183 |
| Ending Page | 188 |
| Page Count | 6 |
| File Format | |
| ISSN | 09722815 |
| Journal | Transactions of the Indian Institute of Metals |
| Volume Number | 69 |
| Issue Number | 2 |
| e-ISSN | 09751645 |
| Language | English |
| Publisher | Springer India |
| Publisher Date | 2016-01-05 |
| Publisher Place | New Delhi |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | 9–12 % Cr steels Z-phase Creep strength Alloy design Metallic Materials Materials Science Tribology, Corrosion and Coatings |
| Content Type | Text |
| Resource Type | Article |
| Subject | Metals and Alloys |
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