Research of the Quality of High-Strength Shipbuilding Steel with High Concentration of Calcium
| Autor: | D. L. Smirnova, A. G. Pavlova, V. V. Tsukanov, V. G. Miliuts |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Ladle Materials science Metallurgy General Engineering Oxide chemistry.chemical_element Izod impact strength test 02 engineering and technology Calcium 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Metal chemistry.chemical_compound chemistry Aluminium visual_art 0103 physical sciences visual_art.visual_art_medium General Materials Science 0210 nano-technology Ductility |
| Zdroj: | Inorganic Materials: Applied Research. 11:1286-1290 |
| ISSN: | 2075-115X 2075-1133 |
| DOI: | 10.1134/s2075113320060179 |
| Popis: | The microstructure of the commercial melt of high-strength shipbuilding steel with a calcium concentration in the ladle sample of 0.009% is investigated, the presence and qualitative composition of nonmetallic inclusions are determined, and mechanical tests are carried out. Owing to the fact that high calcium steel is contaminated with many oxide linage inclusions, the mechanical properties of rolled products (impact strength, Z-direction ductility, quality of technological sample fracture) are sharply reduced. To ensure high purity of high-strength shipbuilding steel with respect to nonmetallic inclusions, it is necessary to observe the strictly regulated technology of deoxidation with aluminum and modification with ferrocalcium to obtain the content of these elements in the metal in the previously recommended limits of 0.01–0.02 and 0.002–0.004%, respectively. |
| Databáze: | OpenAIRE |
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