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| 基于3D热加工图的SUS304奥氏体不锈钢热变形特性研究 |
| Hot Deformation Characterization of SUS304 Stainless Steel Based on 3D Processing Map |
| Received:March 16, 2021 |
| DOI：10.3969/j.issn.1674-6457.2021.03.011 |
| 中文关键词: 奥氏体不锈钢 3D热加工图 热变形 动态再结晶 |
| 英文关键词: austenite stainless steel 3D processing map hot deformation dynamic recrystallization |
| 基金项目:广西创新驱动项目(AA18242003-3);国家自然科学基金(51661004);广西有色金属及特色材料加工重点实验室项目(GXYSSF1809) |
| Author Name | Affiliation | | DING Hao-chen | School of Resources, Environment and Materials | | ZHAO Yan-jun | School of Resources, Environment and Materials
Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China | | HU Zhi-liu | School of Resources, Environment and Materials
Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China | | ZHANG Jing-rui | School of Resources, Environment and Materials | | PANG Xing-zhi | School of Resources, Environment and Materials |
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| 中文摘要: |
| 目的 研究SUS304奥氏体不锈钢的热变形行为。方法 在GLEEBLE-3500热力模拟实验机上对SUS304不锈钢进行了等温热压缩实验，变形温度为850~1250 ℃，应变速率为0.01，0.1，1 s−1，真应变为0.69，基于Arrhenius模型构建了本构方程，并建立了3D热加工图。结果 实验钢在850~1050 ℃/0.1~1 s−1条件下的热变形机制主要为动态回复，在1050~1200 ℃/0.01~0.1 s−1条件下为动态再结晶;热变形激活能为505 kJ/mol，预测应力与实验应力的线性相关系数R2为0.9878。结论 在真应变为0.69时，SUS304不锈钢热加工的优选区间为1000~1100 ℃/0.01~0.02 s−1，变形主导机制为动态再结晶。 |
| 英文摘要: |
| This paper aims to investigate the rheological behavior of SUS304 at high temperature. The isothermal compression of SUS304 austenite stainless steel was carried out by Gleeble-3500 thermal simulator at deformation temperature of 850-1200 ℃, strain rate of 0.01-1 s−1 and true strain of 0.69. The Arrhenius-type constitutive equations based on the data of peak flow stress and the 3D hot processing map were established. The results show that high temperature (1050-1200 ℃) and low strain rate (0.01-0.1 s−1) benefit the occurrence of dynamic recrystallization; The main softening mechanism is dynamic recovery at conditions of 850-1050 ℃/0.1-1 s−1. The apparent activation energy is 505 kJ/mol and the correlation coefficient (R2) considered to be linear relationship between the predicted and experimental flow stress is 0.9878. The optimized hot processing parameter is 0.69/1000-1100 ℃/0.01-0.02 s−1, and the main mechanism of deformation is dynamic recrystallization. |
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