| 碳含量对SA-508 Gr.3钢大锻件组织和性能的影响 |
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| 引用本文： | 张明桥,傅明娇,赵晓光,付朝政,汪洪宇,李卓林.碳含量对SA-508 Gr.3钢大锻件组织和性能的影响[J].金属热处理,2021,46(7):79-83. |
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| 作者姓名： | 张明桥 傅明娇 赵晓光 付朝政 汪洪宇 李卓林 |
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| 作者单位： | 贵州航天科技有限公司, 贵州 遵义 563003 |
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| 摘 要： | 研究了碳含量对SA-508 Gr.3钢大锻件的显微组织和力学性能的影响。结果表明:随着碳含量的增加,SA-508 Gr.3钢的贝氏体转变温度降低,M3C碳化物析出量增加;室温和350 ℃抗拉强度提高,冲击性能先升高后降低,0 ℃冲击断口形貌由混合型断裂转变为韧窝断裂。为使SA-508 Gr.3钢获得较好的综合性能,碳含量应控制在0.19%~0.22%(质量分数)。
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| 关 键 词： | SA-508Gr.3钢 大锻件 碳含量 组织 性能 |
| 收稿时间： | 2021-02-17 |
Effect of carbon content on microstructure and properties of SA-508 Gr. 3 steel heavy forgings |
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| Zhang Mingqiao,Fu Mingjiao,Zhao Xiaoguang,Fu Chaozheng,Wang Hongyu,Li Zhuolin.Effect of carbon content on microstructure and properties of SA-508 Gr. 3 steel heavy forgings[J].Heat Treatment of Metals,2021,46(7):79-83. |
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| Authors: | Zhang Mingqiao Fu Mingjiao Zhao Xiaoguang Fu Chaozheng Wang Hongyu Li Zhuolin |
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| Affiliation: | Guizhou Aerospace Xinli Technology Co., Ltd., Zunyi Guizhou 563003, China |
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| Abstract: | Effect of carbon content on microstructure and properties of heavy forgings of SA-508 Gr.3 steel was investigated. The results show that as the carbon content of the steel increases, the bainite transformation temperature decreases and the precipitation amount of M3C carbides increases. The tensile strength at room temperature and at 350 ℃ are obviously improved, the impact properties first increase and then decrease, and the impact fracture morphologies at 0 ℃ change from mixed fracture to dimple fracture. In order to obtain a better performance, the carbon content of SA-508 Gr.3 steel should be controlled within 0.19%~0.22%(mass fraction). |
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| Keywords: | SA-508 Gr 3 steel heavy forgings carbon content microstructure property |
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