| Relationship of microstructure transformation and hardening behavior of type 17-4 PH stainless steel |
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| 作者姓名： | Jun Wang Hong Zou Cong Li Ruling Zuo Shaoyu Qiu Baoluo Shen |
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| 作者单位： | [1]School of Materials Science and Engineering, Sichuan University, Chengdu 610064, China [2]National Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, P.O. Box 436, Chengdu 610041, China [3]School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China |
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| 摘 要： | The relationship between the microstructure transformation of type 17-4 PH stainless steel and the aging hardening behavior was investigated. The results showed that, when 17-4 PH stainless steel aging at 595℃, the bulk hardness of samples attains its peak value （42.5 HRC） for about 20 min, and then decreases at all time. TEM revealed the microstructure corresponding with peak hardness is that the fine spheroid-shape copper with the fcc crystal structure and the fiber-shape secondary carbide M23C6 precipitated from the lath martensite matrix. Both precipitations of copper and M23C6 are the reasons for strengthening of the alloy at this temperature. With the extension of holding time at this temperature, the copper and secondary carbide grow and lose the coherent relationship with the matrix, so the bulk hardness of samples decreases.
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| 关 键 词： | 显微结构 不锈钢 沉淀硬化 次级碳化物 铜 |
| 收稿时间： | 2005-01-12 |
Relationship of microstructure transformation and hardening behavior of type 17-4 PH stainless steel |
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| Jun Wang Hong Zou Cong Li Ruling Zuo Shaoyu Qiu Baoluo Shen.Relationship of microstructure transformation and hardening behavior of type 17-4 PH stainless steel[J].Journal of University of Science and Technology Beijing,2006,13(3):235-239. |
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| Authors: | Jun Wang Hong Zou Cong Li Ruling Zuo Shaoyu Qiu Baoluo Shen |
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| Affiliation: | 1. Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;3. China Academy of Launch Vehicle Technology, Beijing 100076, China;1. Materials Innovation Guild, University of Louisville, Louisville, KY 40292, United States;2. Oregon State University, Corvallis, OR 973302, United States;3. North American Höganäs, Johnstown, PA 15935, United States;4. Metal Technologies Incorporated, Albany, OR 97322, United States;5. Marmara University, Istanbul, Turkey 34722;1. Department of Materials Science and Engineering, Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA;2. Additive Manufacturing Innovation Center, University of Connecticut, Storrs, CT 06269, USA |
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| Abstract: | The relationship between the microstructure transformation of type 17-4 PH stainless steel and the aging hardening behavior was investigated. The results showed that, when 17-4 PH stainless steel aging at 595℃, the bulk hardness of samples attains its peak value (42.5 HRC) for about 20 min, and then decreases at all time. TEM revealed the microstructure corresponding with peak hardness is that the fine spheroid-shape copper with the fcc crystal structure and the fiber-shape secondary carbide M23C6 precipitated from the lath martensite matrix. Both precipitations of copper and M23C6 are the reasons for strengthening of the alloy at this temperature. With the extension of holding time at this temperature, the copper and secondary carbide grow and lose the coherent relationship with the matrix, so the bulk hardness of samples decreases. |
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| Keywords: | 17-4 PH stainless steel H1100 condition precipitation copper secondary carbide |
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