Improvement of Low-Alloy Pipe Steel Sulfide Stress Cracking Resistance
| Autor: | Alexey Kholodnyi, Ya. S. Kuznechenko, D. I. Yusupov, M. V. Il’ichev, Yu. I. Matrosov |
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| Rok vydání: | 2019 |
| Předmět: |
Austenite
Materials science Hydrogen 020502 materials Alloy 0211 other engineering and technologies Metals and Alloys chemistry.chemical_element 02 engineering and technology engineering.material Condensed Matter Physics Microstructure 0205 materials engineering chemistry Mechanics of Materials Materials Chemistry engineering Thermomechanical processing Composite material Fillet (mechanics) Dispersion (chemistry) Sulfide stress cracking 021102 mining & metallurgy |
| Zdroj: | Metallurgist. 63:376-387 |
| ISSN: | 1573-8892 0026-0894 |
| DOI: | 10.1007/s11015-019-00833-8 |
| Popis: | The influence of sheet microstructure formed by various thermomechanical processing schedules on sulfide stress cracking (SSC) resistance under uniaxial tension for low-alloy pipe steels grades X42–X65 is studied. A favorable role is established for substitution of a ferritic-pearlitic by a ferritic-bainitic microstructure and improvement of structural component dispersion is established. The favorable effect is facilitated by using high intensity post-deformation cooling from the austenite region. It is shown that segregation bands and non-metallic inclusions in a sheet axial zone do not affect the duration of specimens withstanding SSC, but they can lead to formation of hydrogen cracks (HIC) on a specimen surface that is a defective feature. In order to prevent crack formation in a specimen surface and premature failure it is necessary to lay down high specifications for specimen gauge length and fillet surface quality. |
| Databáze: | OpenAIRE |
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