| 18Ni（1 700 MPa）型马氏体时效钢时效工艺研究 |
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| 引用本文： | 时雨,卫广智,赵飞.18Ni（1 700 MPa）型马氏体时效钢时效工艺研究[J].兵器材料科学与工程,2013(3). |
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| 作者姓名： | 时雨 卫广智 赵飞 |
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| 作者单位： | 贵州大学 材料与冶金学院,贵州 贵阳,550025 |
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| 基金项目： | 贵州省工业攻关项目(黔科合GY字 |
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| 摘 要： | 研究不同时效温度和时间对820 ℃×1 h固溶处理后的18Ni马氏体时效钢硬度的影响规律。研究了480 ℃时效3h和4 h的拉伸性能，并利用金相显微镜、扫描电镜对时效后的组织和断口进行观察分析。结果表明：当时效温度较低（460 ℃），时效3 h达到峰值的98%左右；在较高温度（520 ℃）时效，10 min左右即可达到该水平；最优时效工艺为480 ℃×3 h；两种时效工艺下的断口有明显的延伸和缩颈，中心存在大量韧窝，为典型的韧性断裂。
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| 关 键 词： | 18Ni马氏体时效钢 时效 力学特性 Ni3Mo Ni3Ti |
Aging process of 18Ni(1 700 MPa)maraging steel |
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| SHI Yu
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WEI Guangzhi
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ZHAO Fei.Aging process of 18Ni(1 700 MPa)maraging steel[J].Ordnance Material Science and Engineering,2013(3). |
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| Authors: | SHI Yu WEI Guangzhi ZHAO Fei |
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| Abstract: | The effects of different aging temperature and time on hardness of 18Ni maraging steel which was solution treated at 820 ℃ for 1 h were studied. The results show that when aging at 460 ℃ for 3 h tensile strenght reaches about 98% of peak value, while aging at 520 ℃ for about 10 min,tensile strenght rcaches the same level. Aging at 480 ℃ for 3 h is the optimal aging process in this experiments. The fracture is obvious extension and necking and a large number of dimples occur in the center. It is typical ductile fracture under two kinds of aging process. |
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| Keywords: | 18Ni maraging steel aging mechanical properties Ni3Mo Ni3Ti |
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