Secondary hardening of low-alloyed creep-resistant steel welds
The T24 steel represents the new generation of low-alloyed creep resistant steels with higher creep resistance and lower carbon content. It was designed as prospective material for membrane waterwalls of ultra super critical (USC) power plants, enabling to avoid preheating and post weld heat treatme...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Croatian Metallurgical Society
2014-01-01
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| Series: | Metalurgija |
| Subjects: | |
| Online Access: | http://hrcak.srce.hr/file/153461 |
| _version_ | 1819122337483587584 |
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| author | P. Mohyla Z. Kubon R. Cep A. Janasek I. Samardžić |
| author_facet | P. Mohyla Z. Kubon R. Cep A. Janasek I. Samardžić |
| author_sort | P. Mohyla |
| collection | DOAJ |
| description | The T24 steel represents the new generation of low-alloyed creep resistant steels with higher creep resistance and lower carbon content. It was designed as prospective material for membrane waterwalls of ultra super critical (USC) power plants, enabling to avoid preheating and post weld heat treatment (PWHT) during welding. However, our investigations concerning secondary hardening of vanadium containing low-alloyed steels show that non-tempered welded joints undergo a significant increase in hardness during exposure to operating temperature. The results then imply that PWHT of T24 steel welds is necessary and this idea is at present supported by the occurrence of several troubles with new installations of USC blocks in Europe. |
| first_indexed | 2024-12-22T06:50:51Z |
| format | Article |
| id | doaj.art-811b050424084d0dbbea6a2b1a9d5399 |
| institution | Directory Open Access Journal |
| issn | 0543-5846 1334-2576 |
| language | English |
| last_indexed | 2024-12-22T06:50:51Z |
| publishDate | 2014-01-01 |
| publisher | Croatian Metallurgical Society |
| record_format | Article |
| series | Metalurgija |
| spelling | doaj.art-811b050424084d0dbbea6a2b1a9d53992022-12-21T18:35:09ZengCroatian Metallurgical SocietyMetalurgija0543-58461334-25762014-01-015312528Secondary hardening of low-alloyed creep-resistant steel weldsP. MohylaZ. KubonR. CepA. JanasekI. SamardžićThe T24 steel represents the new generation of low-alloyed creep resistant steels with higher creep resistance and lower carbon content. It was designed as prospective material for membrane waterwalls of ultra super critical (USC) power plants, enabling to avoid preheating and post weld heat treatment (PWHT) during welding. However, our investigations concerning secondary hardening of vanadium containing low-alloyed steels show that non-tempered welded joints undergo a significant increase in hardness during exposure to operating temperature. The results then imply that PWHT of T24 steel welds is necessary and this idea is at present supported by the occurrence of several troubles with new installations of USC blocks in Europe.http://hrcak.srce.hr/file/153461T24 steel14MoV6-3 steelweldsmechanical propertiespost weld heat treatment |
| spellingShingle | P. Mohyla Z. Kubon R. Cep A. Janasek I. Samardžić Secondary hardening of low-alloyed creep-resistant steel welds Metalurgija T24 steel 14MoV6-3 steel welds mechanical properties post weld heat treatment |
| title | Secondary hardening of low-alloyed creep-resistant steel welds |
| title_full | Secondary hardening of low-alloyed creep-resistant steel welds |
| title_fullStr | Secondary hardening of low-alloyed creep-resistant steel welds |
| title_full_unstemmed | Secondary hardening of low-alloyed creep-resistant steel welds |
| title_short | Secondary hardening of low-alloyed creep-resistant steel welds |
| title_sort | secondary hardening of low alloyed creep resistant steel welds |
| topic | T24 steel 14MoV6-3 steel welds mechanical properties post weld heat treatment |
| url | http://hrcak.srce.hr/file/153461 |
| work_keys_str_mv | AT pmohyla secondaryhardeningoflowalloyedcreepresistantsteelwelds AT zkubon secondaryhardeningoflowalloyedcreepresistantsteelwelds AT rcep secondaryhardeningoflowalloyedcreepresistantsteelwelds AT ajanasek secondaryhardeningoflowalloyedcreepresistantsteelwelds AT isamardzic secondaryhardeningoflowalloyedcreepresistantsteelwelds |