Влияние непрерывной и импульсной электронно-лучевой обработки на покрытие из хромованидиевого чугуна; Материалы и технологии новых поколений в современном материаловедении
| Parent link: | Материалы и технологии новых поколений в современном материаловедении.— 2015.— [С. 164-168] |
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| Resumo: | Заглавие с титульного экрана The paper reports the results of an investigation of structure formation in the eutectic chromium-vanadium cast iron coating deposited by electron-beam hardfacing (EBH) and subjected to multipoint pulsed electron-beam treatment (MPEBT) of the surface layers. The coating material structure in the zones modified by MPEBT changes considerably, showing the presence of a large amount of supersaturated austenite matrix and eutectic colonies in the form of fine isolated inclusions. The eutectic colonies are fan-like. The leading phase in the eutectic colonies is vanadium carbide. After aging within the temperature range from 900 to 1100°С the structure of the modified zones exhibits a large amount of fine secondary carbides Cr7C3 rejected from the matrix. The secondary carbides are uniformly distributed in the bulk of the modified zones. The matrix after aging undergoes [gamma]->[alpha] transformation and mainly has the martensitic structure. Aging increases significantly the hardness of the modified zones and abrasive wear resistance of the entire coating. |
| Idioma: | russo |
| Publicado em: |
2015
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| Colecção: | Поверхностное упрочнение и защитные покрытия |
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| Acesso em linha: | http://earchive.tpu.ru/handle/11683/18263 http://www.lib.tpu.ru/fulltext/c/2015/C39/038.pdf |
| Formato: | Recurso Electrónico Capítulo de Livro |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=616423 |
| Resumo: | Заглавие с титульного экрана The paper reports the results of an investigation of structure formation in the eutectic chromium-vanadium cast iron coating deposited by electron-beam hardfacing (EBH) and subjected to multipoint pulsed electron-beam treatment (MPEBT) of the surface layers. The coating material structure in the zones modified by MPEBT changes considerably, showing the presence of a large amount of supersaturated austenite matrix and eutectic colonies in the form of fine isolated inclusions. The eutectic colonies are fan-like. The leading phase in the eutectic colonies is vanadium carbide. After aging within the temperature range from 900 to 1100°С the structure of the modified zones exhibits a large amount of fine secondary carbides Cr7C3 rejected from the matrix. The secondary carbides are uniformly distributed in the bulk of the modified zones. The matrix after aging undergoes [gamma]->[alpha] transformation and mainly has the martensitic structure. Aging increases significantly the hardness of the modified zones and abrasive wear resistance of the entire coating. |
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