| 60Si2Mn弹簧钢退火过程中的组织与性能变化 |
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| 引用本文： | 赵阳磊,王灵水,邱胜闻,董升朝,陈利阳. 60Si2Mn弹簧钢退火过程中的组织与性能变化[J]. 金属热处理, 2021, 46(8): 180-183. DOI: 10.13251/j.issn.0254-6051.2021.08.033 |
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| 作者姓名： | 赵阳磊 王灵水 邱胜闻 董升朝 陈利阳 |
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| 作者单位： | 1.中国船舶重工集团公司第七二五研究所(洛阳船舶材料研究所), 河南 洛阳 471000;2.洛阳双瑞特种装备有限公司, 河南 洛阳 471000 |
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| 摘 要： | 采用金相分析、能谱分析、力学性能检测等方法研究了60Si2Mn热轧弹簧钢在略低于奥氏体初始转变温度Ac1退火过程中的组织和性能变化。研究发现,退火过程中试验钢的强度、硬度随退火时间的延长先下降后升高,试样的塑性、韧性则先升高后降低。金相分析结果显示,试样在退火过程中首先珠光体中的渗碳体片层不断增厚、间距增大,然后渗碳体片层发生断裂、球化,球化率随时间的延长不断提高;当退火时间达到10 h之后试样中出现“岛状组织”,并且随着退火时间的延长,“岛状组织”体积分数不断增多,30 h达到20%。经过进一步分析检测,“岛状组织”为马氏体,马氏体组织中的Si含量显著低于基体组织,而Mn含量显著高于基体组织。
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| 关 键 词： | 60Si2Mn钢 退火 渗碳体 球化 马氏体 |
| 收稿时间： | 2021-03-25 |
Change of microstructure and properties of 60 Si2 Mn spring steel during annealing |
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| Zhao Yanglei,Wang Lingshui,Qiu Shengwen,Dong Shengchao,Chen Liyang. Change of microstructure and properties of 60 Si2 Mn spring steel during annealing[J]. Heat Treatment of Metals, 2021, 46(8): 180-183. DOI: 10.13251/j.issn.0254-6051.2021.08.033 |
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| Authors: | Zhao Yanglei Wang Lingshui Qiu Shengwen Dong Shengchao Chen Liyang |
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| Affiliation: | 1. Luoyang Ship Material Research Institute, China State Shipbuilding Corporation Limited, Luoyang Henan 471000, China;2. Luoyang Sunrui Special Equipment Co., Ltd., Luoyang Henan 471000, China |
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| Abstract: | Microstructure evolution and change of properties of the 60Si2Mn hot rolled spring steel annealed at the temperature slightly lower than the initial austenite transformation temperature Ac1 were studied by means of metallographic, EDS analysis and mechanical property tests. The results show that the strength and hardness of the tested steel first decrease and then increase with the increase of annealing time. While the plasticity and toughness first increase and then decrease. The results of metallographic analysis show that during annealing, the cementite lamellae in the pearlite are firstly thickened and the spacing increases, and then the cementite lamellae are fractured and spheroidized, and the spheroidization rate increases with the increase of annealing time. When the annealing time exceeds 10 h, the “island structure” appears in the specimen, with its volume fraction increasing with the increase of annealing time, and reaching 20% when annealed for 30 h. Further analysis demonstrates that the “island structure” is the martensite, in which the Si content is significantly lower than that in the matrix, while the Mn content is significantly higher than that in the matrix. |
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| Keywords: | 60Si2Mn steel annealing cementite spheroidization martensite |
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