Modification of steel with barium and strontium
| Autor: | O. I. Nokhrina, M. A. Platonov, I. D. Rozhikhina, V. I. Dmitrienko |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Strontium
Materials science Silicon 020502 materials Metallurgy chemistry.chemical_element Barium Izod impact strength test 02 engineering and technology Microstructure Casting 020501 mining & metallurgy 0205 materials engineering chemistry Aluminium General Materials Science Size effect on structural strength |
| Zdroj: | Steel in Translation. 45:908-912 |
| ISSN: | 1935-0988 0967-0912 |
| DOI: | 10.3103/s0967091215120104 |
| Popis: | The modification of steel by natural materials containing barium and strontium is considered. Thermodynamic modeling of the reduction of barium and strontium by silicon and aluminum is undertaken. The influence of modification by barium and strontium on the structure and mechanical properties of the steel is studied. The results are employed in the production of 25Γ2C and Γ13 steel in arc furnaces at the casting shop of OAO EVRAZ ZSMK and also in the production of 35XΓCЛ, 30XΓCЛ, and 12HЛ2ΦX steel at OAO Yurginskii Mashinostroitel’nyi Zavod by two-slag technology. The results of industrial tests indicate that modification with barium and strontium affects the microstructure and nonmetallic inclusions; and increases the margin of structural strength of the steel, estimated in terms of the yield point, strength, and impact strength at positive and negative temperatures. To identify the presence of barium and strontium in the steel, its structure is analyzed by means of extraction replicas on a transmission electron-diffraction microscope. The presence of barium and strontium within the grains indicates their reaction with the metallic melt, which affects the structure of the metallic matrix. |
| Databáze: | OpenAIRE |
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