| 王熙哲,赵海涛.冷却方式对304不锈钢显微组织和性能的影响[J].有色金属材料与工程,2025,46(2):82-87. |
| 冷却方式对304不锈钢显微组织和性能的影响 |
| Effects of cooling condition on the orientation and grain size of stainless steel |
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| DOI：10.13258/j.cnki.nmme.20240106001 |
| 中文关键词: 不锈钢 冷却方式 电子背散射衍射 晶粒取向 |
| 英文关键词:stainless steel cooling mode electron backscatter diffraction crystal orientation |
| 基金项目:辽宁省科学技术计划资助项目（2023JH2；10700022） |
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| 中文摘要: |
| 将304不锈钢在1 050 ℃下保温30 min后分别以水冷、油冷、空冷和炉冷等方式冷却，利用电子背散射衍射（electron back-scattered diffraction，EBSD)对样品的晶粒取向、晶粒大小和孪晶进行分析。结果表明，经高温热处理后冷却的样品，其晶粒尺寸相较于原始样品的更为粗大，以大角度晶界为主，不存在明显的晶粒择优取向。晶粒尺寸随着冷却速率的减小而增大，由水冷时的39.12 μm增大到炉冷时的45.74 μm。随着冷却速率的减小，孪晶数量也随之减少，分别由水冷时的52.0%减小到炉冷时的45.9%。此外，随着冷却速率的减小，样品的洛氏硬度减小。样品水冷时的洛氏硬度可达到23.1 HRC，比原始样品的增大约11.0%。 |
| 英文摘要: |
| 304 stainless steel was kept at 1 050 °C for 30 min and then cooled by water cooling, oil cooling, air cooling and furnace cooling, respectively. Electron back-scattered diffraction (EBSD) was utilized to analyze the grain orientation, grain size and twins of the samples. The results show that for the samples cooled after high-temperature heat treatment, their grain sizes are coarser than that of the original sample. There are mainly high-angle grain boundaries without obvious preferred grain orientation. The grain size increases with the decrease of cooling rate, which increases from 39.12 μm for water cooling to 45.74 μm for furnace cooling. As the cooling rate decreases, the number of twins also decreases, which decreases from 52.0% for water cooling to 45.9% for furnace cooling. Additionally, with decrease of the cooling rate, the Rockwell hardness of the samples decreases. The Rockwell hardness of the water-cooled samples can reach 23.1 HRC, which is approximately 11.0% higher than that of the original sample. |
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