| 低碳微合金钢中针状铁素体的微观力学性能及其组织稳定性 |
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| 引用本文： | 吴开明,张莉芹,贺信莱,尚成嘉,杨善武,王学敏.低碳微合金钢中针状铁素体的微观力学性能及其组织稳定性[J].金属学报,2006,42(1):19-22. |
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| 作者姓名： | 吴开明 张莉芹 贺信莱 尚成嘉 杨善武 王学敏 |
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| 作者单位： | 武汉科技大学应用物理系,钢铁冶金及资源利用省部共建重点实验室,武汉,430081;北京科技大学材料物理系,北京,100083 |
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| 摘 要： | 利用纳米力学探针和扫描电子显微镜对低碳微合金钢中针状铁素体的微观力学性能和组织稳定性进行了研究．微合金钢在850℃变形弛豫一定时间后水冷得到了针状铁素体、粒状贝氏体和板条状贝氏体的复合组织．板条状贝氏体、粒状贝氏体和针状铁素体的微观力学性能依次降低，回火稳定性依次升高．弹性模量依次降低约15GPa，硬度依次降低约0．6GPa．
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| 关 键 词： | 微合金钢 针状铁素体 纳米硬度 微观力学性能 组织稳定性 |
| 文章编号： | 0412-1961（2006）01-0019-04 |
| 收稿时间： | 2005-04-13 |
| 修稿时间： | 2005-04-132005-08-08 |
Micro Mechanical Properties and Stability of Acicular Ferrite in a Low Carbon Microalloyed Steel |
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| WU Kaiming,ZHANG Liqin,HE Xinlai,SHANG Chengjia,YANG Shanwu,WANG Xuemin.Micro Mechanical Properties and Stability of Acicular Ferrite in a Low Carbon Microalloyed Steel[J].Acta Metallurgica Sinica,2006,42(1):19-22. |
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| Authors: | WU Kaiming ZHANG Liqin HE Xinlai SHANG Chengjia YANG Shanwu WANG Xuemin |
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| Affiliation: | Department of Applied Physics, Key Laboratory of Ferrous Metallurgy and Resources Utilization, Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081;Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083 |
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| Abstract: | The micro mechanical properties and stability of acicular ferrite in a low carbon microalloyed steel were studied by using nano indentation and SEM. The mixed microstructure of acicular ferrite, granular bainite and plate-like bainite was obtained when the specimen was water cooled immediately after hot deformation and relaxation for a fixed time. The elastic modulus and hardness are decreased in the sequence of plate-like bainite, granular bainite and acicular ferrite by about 15 and 0.6 GPa, respectively. In the contrast with the above sequence, the tempering treatment showed that the acicular ferrite has higher stability than the granular bainite, and the granular bainite has higher stability than plate-like bainite. |
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| Keywords: | microalloyed steel acicular ferrite nano indentation micro mechanical property microstructure stability |
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