| 30CrMnSiNi2A钢强韧化热处理的研究 |
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| 引用本文： | 张明星,胡光立. 30CrMnSiNi2A钢强韧化热处理的研究[J]. 航空学报, 1990, 11(12): 576-582 |
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| 作者姓名： | 张明星 胡光立 |
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| 作者单位： | 西北工业大学(张明星)，西北工业大学(胡光立) |
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| 摘 要： | 用正交试验法研究了等温温度、等温时间、奥氏体化温度和原始组织状态对30CrMnSiNi2A钢组织和性能的影响,提出了可保证该钢在上、中、下限碳量时各项性能均达到技术要求的热处理工艺。对新工艺显著改善钢强韧性的原因作了分析,研究了30CrMnSiNi2A钢在250～280℃温度范围等温淬火后K_(IC)值出现低谷的现象,并认为在该热处理条件下在马氏体与贝氏体交接面处有大量孪晶马氏体存在以及组织中有许多平行排列的细长等温马氏体板条束出现,是造成K_(IC)值降低的主要原因。
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| 关 键 词： | 30CrMnSiNi2A钢 热处理 等温淬火 |
THE STUDY OF HEAT-TREATMENT PROCESS OF IMPROVING STRENGTH AND TOUGHNESS OF 30CrMnSiNi2A STEEL |
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| Northwestern Polytechnical University Zhang Mingxing and Hu Guangli. THE STUDY OF HEAT-TREATMENT PROCESS OF IMPROVING STRENGTH AND TOUGHNESS OF 30CrMnSiNi2A STEEL[J]. Acta Aeronautica et Astronautica Sinica, 1990, 11(12): 576-582 |
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| Authors: | Northwestern Polytechnical University Zhang Mingxing and Hu Guangli |
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| Affiliation: | Northwestern Polytechnical University Zhang Mingxing and Hu Guangli |
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| Abstract: | The effect of isothermal temperature, isothermal holding time, austenitizing temperature and original structure on the microstructure and mechanical properties of 30CrMnSiNi2A steel are studied by using orthogonal experimental method. A new heat-treatment process is suggested, which can ensure the carbon content of steel within upper and lower limit to fulfill the technical requirements. The reason for the suggested process of improving the strength and toughness of the steel is discussed. The twin martensite between lath martensite and bainite and the long lath martensite are the main reasons for the decrease of KIC when the steel is isothermally quenched at 240℃-280℃. |
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| Keywords: | 30CrMnSiNi2A steel heat-treatment isothermal quenching. |
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