Tempering Behavior of Novel Low-Alloy High-Strength Steel
The effect of tempering on the mechanical properties, structure, and dispersion of secondary phase particles is studied in 0.4%C-2%Si-1%Cr-1%Mo-VNb steel. This steel austenitized at 900 °C with subsequent water quenching exhibits a yield stress of 1445 MPa and a lath martensite structure with MX par...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/12/2177 |
| _version_ | 1797456337413603328 |
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| author | Valeriy Dudko Diana Yuzbekova Sergey Gaidar Sofia Vetrova Rustam Kaibyshev |
| author_facet | Valeriy Dudko Diana Yuzbekova Sergey Gaidar Sofia Vetrova Rustam Kaibyshev |
| author_sort | Valeriy Dudko |
| collection | DOAJ |
| description | The effect of tempering on the mechanical properties, structure, and dispersion of secondary phase particles is studied in 0.4%C-2%Si-1%Cr-1%Mo-VNb steel. This steel austenitized at 900 °C with subsequent water quenching exhibits a yield stress of 1445 MPa and a lath martensite structure with MX particles of ~40 nm located in matrix and boundary M<sub>6</sub>C carbides of ~210 nm. Tempering in the temperature interval of 200–400 °C provides a yield stress of 1625 MPa due to the precipitation of ε-carbide and cementite within laths. The yield stress decreases to 1415 and 1310 MPa after tempering at 500 and 650 °C, respectively, due to the replacement of matrix carbides by boundary M<sub>23</sub>C<sub>6</sub> carbide. A Charpy V-notch impact energy of ~12 J/cm<sup>2</sup> is almost independent from tempering temperatures of up to 400 °C and increases up to ~33 J/cm<sup>2</sup> after tempering at 650 °C due to decreased yield stresses and increased plasticity. |
| first_indexed | 2024-03-09T16:06:21Z |
| format | Article |
| id | doaj.art-96dab6d092784c57a9fcc54528c0744b |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T16:06:21Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-96dab6d092784c57a9fcc54528c0744b2023-11-24T16:42:13ZengMDPI AGMetals2075-47012022-12-011212217710.3390/met12122177Tempering Behavior of Novel Low-Alloy High-Strength SteelValeriy Dudko0Diana Yuzbekova1Sergey Gaidar2Sofia Vetrova3Rustam Kaibyshev4Russian State Agrarian University-Moscow Timiryazev Agricultural Academy, 127550 Moscow, RussiaRussian State Agrarian University-Moscow Timiryazev Agricultural Academy, 127550 Moscow, RussiaRussian State Agrarian University-Moscow Timiryazev Agricultural Academy, 127550 Moscow, RussiaRussian State Agrarian University-Moscow Timiryazev Agricultural Academy, 127550 Moscow, RussiaRussian State Agrarian University-Moscow Timiryazev Agricultural Academy, 127550 Moscow, RussiaThe effect of tempering on the mechanical properties, structure, and dispersion of secondary phase particles is studied in 0.4%C-2%Si-1%Cr-1%Mo-VNb steel. This steel austenitized at 900 °C with subsequent water quenching exhibits a yield stress of 1445 MPa and a lath martensite structure with MX particles of ~40 nm located in matrix and boundary M<sub>6</sub>C carbides of ~210 nm. Tempering in the temperature interval of 200–400 °C provides a yield stress of 1625 MPa due to the precipitation of ε-carbide and cementite within laths. The yield stress decreases to 1415 and 1310 MPa after tempering at 500 and 650 °C, respectively, due to the replacement of matrix carbides by boundary M<sub>23</sub>C<sub>6</sub> carbide. A Charpy V-notch impact energy of ~12 J/cm<sup>2</sup> is almost independent from tempering temperatures of up to 400 °C and increases up to ~33 J/cm<sup>2</sup> after tempering at 650 °C due to decreased yield stresses and increased plasticity.https://www.mdpi.com/2075-4701/12/12/2177ultrahigh-strength low-alloy steelstempering behaviorprecipitation sequence |
| spellingShingle | Valeriy Dudko Diana Yuzbekova Sergey Gaidar Sofia Vetrova Rustam Kaibyshev Tempering Behavior of Novel Low-Alloy High-Strength Steel Metals ultrahigh-strength low-alloy steels tempering behavior precipitation sequence |
| title | Tempering Behavior of Novel Low-Alloy High-Strength Steel |
| title_full | Tempering Behavior of Novel Low-Alloy High-Strength Steel |
| title_fullStr | Tempering Behavior of Novel Low-Alloy High-Strength Steel |
| title_full_unstemmed | Tempering Behavior of Novel Low-Alloy High-Strength Steel |
| title_short | Tempering Behavior of Novel Low-Alloy High-Strength Steel |
| title_sort | tempering behavior of novel low alloy high strength steel |
| topic | ultrahigh-strength low-alloy steels tempering behavior precipitation sequence |
| url | https://www.mdpi.com/2075-4701/12/12/2177 |
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