Effect of two-step cooling process on mechanical properties of TRIP steel with high performance
| Autor: | Xiao-Gang Lu, Hui Wang, G.T. Zhang, M.L. Li, Yanlin He, L.B. Chen, Hu Jiang, Lin Li |
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| Rok vydání: | 2018 |
| Předmět: |
Austenite
Materials science Bainite Precipitation (chemistry) Cementite Metals and Alloys TRIP steel 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 020501 mining & metallurgy chemistry.chemical_compound 0205 materials engineering chemistry Mechanics of Materials Ferrite (iron) Materials Chemistry Composite material 0210 nano-technology Tensile testing |
| Zdroj: | Journal of Iron and Steel Research International. 25:426-432 |
| ISSN: | 2210-3988 1006-706X |
| Popis: | A novel two-step cooling experiment was established to simulate the slow cooling process of continuous annealing production line for transformation-induced plasticity (TRIP) steel. The microstructures and mechanical properties of TRIP steel soaked at 700 °C for different time were investigated by tensile test, scanning electron microscopy, X-ray diffraction, and thermodynamic and kinetic calculation. It is shown that the steel soaked for 15 s exhibits the optimal product of strength and elongation (PSE > 30,000 MPa%) due to the transformation of austenite to proeutectoid ferrite, which delays the bainite transformation and improves the stability of retained austenite. In addition, the mechanical properties of TRIP steel soaked over 30 s are much lower, resulting from the precipitation of cementite, which decreases the stability of retained austenite and weakens the TRIP effect. |
| Databáze: | OpenAIRE |
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