Hot Deformation Behavior and Hot Processing Map of 50CrVA Spring Steel
It is important to explore the hot deformation behavior and establish the hot processing map of steel to design and optimize the hot rolling process. In this paper, 50CrVA spring steel was used as the experimental material. Single-pass compression tests were performed at 850–1150 °C and 0.01–5 s<...
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2024-12-01
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| author | Yang Zhao Jian Zheng Zhi Liu Liqing Chen |
| author_facet | Yang Zhao Jian Zheng Zhi Liu Liqing Chen |
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| description | It is important to explore the hot deformation behavior and establish the hot processing map of steel to design and optimize the hot rolling process. In this paper, 50CrVA spring steel was used as the experimental material. Single-pass compression tests were performed at 850–1150 °C and 0.01–5 s<sup>−1</sup> on an MMS-300 thermo-mechanical simulation testing machine to investigate the hot deformation behavior and establish the hot processing map. The results show that as the strain rate increases and the deformation temperature decreases, the flow stress of 50CrVA spring steel increases. The constitutive equation of 50CrVA spring steel is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><mi>ε</mi><mo>˙</mo></mover><mo>=</mo><mn>1.01</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>14</mn></mrow></msup><msup><mrow><mo stretchy="false">[</mo><mi>sinh</mi><mo stretchy="false">(</mo><mn>0.0094</mn><msub><mi>σ</mi><mi>p</mi></msub><mo stretchy="false">)</mo><mo stretchy="false">]</mo></mrow><mrow><mn>4.53</mn></mrow></msup><mi>exp</mi><mo stretchy="false">(</mo><mo>−</mo><mstyle scriptlevel="0" displaystyle="true"><mfrac><mrow><mn>364</mn><mo>,</mo><mn>470</mn></mrow><mrow><mi>R</mi><mi>T</mi></mrow></mfrac></mstyle><mo stretchy="false">)</mo></mrow></semantics></math></inline-formula>. The dynamic recrystallization critical strain model is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>ε</mi><mi>c</mi></msub><mo>=</mo><mn>4.19</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup><msup><mi>Z</mi><mrow><mn>7.31</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup></mrow></msup></mrow></semantics></math></inline-formula>. A hot processing map of 50CrVA spring steel was constructed to determine the plastic instability region and optimal hot working region. |
| format | Article |
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| spelling | doaj-art-dbb3260dee9447cb8d112f18b6377f182024-12-27T14:39:56ZengMDPI AGMetals2075-47012024-12-011412139110.3390/met14121391Hot Deformation Behavior and Hot Processing Map of 50CrVA Spring SteelYang Zhao0Jian Zheng1Zhi Liu2Liqing Chen3School of Materials Science and Engineering, Northeastern University, Shenyang 110819, ChinaXiangtan Iron & Steel Co., Ltd. of Hunan Valin, Xiangtan 411101, ChinaXiangtan Iron & Steel Co., Ltd. of Hunan Valin, Xiangtan 411101, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaIt is important to explore the hot deformation behavior and establish the hot processing map of steel to design and optimize the hot rolling process. In this paper, 50CrVA spring steel was used as the experimental material. Single-pass compression tests were performed at 850–1150 °C and 0.01–5 s<sup>−1</sup> on an MMS-300 thermo-mechanical simulation testing machine to investigate the hot deformation behavior and establish the hot processing map. The results show that as the strain rate increases and the deformation temperature decreases, the flow stress of 50CrVA spring steel increases. The constitutive equation of 50CrVA spring steel is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><mi>ε</mi><mo>˙</mo></mover><mo>=</mo><mn>1.01</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>14</mn></mrow></msup><msup><mrow><mo stretchy="false">[</mo><mi>sinh</mi><mo stretchy="false">(</mo><mn>0.0094</mn><msub><mi>σ</mi><mi>p</mi></msub><mo stretchy="false">)</mo><mo stretchy="false">]</mo></mrow><mrow><mn>4.53</mn></mrow></msup><mi>exp</mi><mo stretchy="false">(</mo><mo>−</mo><mstyle scriptlevel="0" displaystyle="true"><mfrac><mrow><mn>364</mn><mo>,</mo><mn>470</mn></mrow><mrow><mi>R</mi><mi>T</mi></mrow></mfrac></mstyle><mo stretchy="false">)</mo></mrow></semantics></math></inline-formula>. The dynamic recrystallization critical strain model is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>ε</mi><mi>c</mi></msub><mo>=</mo><mn>4.19</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup><msup><mi>Z</mi><mrow><mn>7.31</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup></mrow></msup></mrow></semantics></math></inline-formula>. A hot processing map of 50CrVA spring steel was constructed to determine the plastic instability region and optimal hot working region.https://www.mdpi.com/2075-4701/14/12/139150CrVA spring steelhot deformation behaviordynamic recrystallization critical strainmicrostructural evolutionhot processing map |
| spellingShingle | Yang Zhao Jian Zheng Zhi Liu Liqing Chen Hot Deformation Behavior and Hot Processing Map of 50CrVA Spring Steel Metals 50CrVA spring steel hot deformation behavior dynamic recrystallization critical strain microstructural evolution hot processing map |
| title | Hot Deformation Behavior and Hot Processing Map of 50CrVA Spring Steel |
| title_full | Hot Deformation Behavior and Hot Processing Map of 50CrVA Spring Steel |
| title_fullStr | Hot Deformation Behavior and Hot Processing Map of 50CrVA Spring Steel |
| title_full_unstemmed | Hot Deformation Behavior and Hot Processing Map of 50CrVA Spring Steel |
| title_short | Hot Deformation Behavior and Hot Processing Map of 50CrVA Spring Steel |
| title_sort | hot deformation behavior and hot processing map of 50crva spring steel |
| topic | 50CrVA spring steel hot deformation behavior dynamic recrystallization critical strain microstructural evolution hot processing map |
| url | https://www.mdpi.com/2075-4701/14/12/1391 |
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