| 2Cr13不锈钢的回火脆性 |
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| 引用本文： | 朱宏伟,王萍,胡婉婷,陈鑫,黄艳军,郁瑞兴,庄圆宏,陈永栓.2Cr13不锈钢的回火脆性[J].金属热处理,2022,47(12):234-236. |
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| 作者姓名： | 朱宏伟 王萍 胡婉婷 陈鑫 黄艳军 郁瑞兴 庄圆宏 陈永栓 |
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| 作者单位： | 首都航天机械有限公司, 北京 100076 |
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| 摘 要： | 研究2Cr13不锈钢在回火脆性温度区间附近进行回火后,硬度、冲击性能的变化和断口形貌演变。结果表明,2Cr13不锈钢在490~550 ℃回火后,硬度处于40~50 HRC之间,相应的冲击性能呈现下降趋势;在570~620 ℃回火后,不锈钢的硬度在30~38 HRC范围内,冲击性能逐渐升高。通过对冲击断口形貌进行观察,在490~560 ℃回火,不锈钢断裂模式由解理断裂向沿晶断裂转变;随着回火温度升高,最终转变为沿晶+解离的断裂模式,微观上沿晶断裂断面尺寸逐渐缩小,解离数量逐渐增多,表现为宏观上冲击性能的提高。
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| 关 键 词： | 2Cr13不锈钢 回火脆性 冲击性能 硬度 |
| 收稿时间： | 2022-06-30 |
Tempering brittleness of 2Cr13 stainless steel |
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| Zhu Hongwei,Wang Ping,Hu Wanting,Chen Xin,Huang Yanjun,Yu Ruixing,Zhuang Yuanhong,Chen Yongshuan.Tempering brittleness of 2Cr13 stainless steel[J].Heat Treatment of Metals,2022,47(12):234-236. |
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| Authors: | Zhu Hongwei Wang Ping Hu Wanting Chen Xin Huang Yanjun Yu Ruixing Zhuang Yuanhong Chen Yongshuan |
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| Affiliation: | Capital Aerospace Machinery Company, Beijing 100076, China |
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| Abstract: | Changes of hardness, impact property and fracture morphology evolution of the 2Cr13 stainless steel after tempering near the tempering brittle temperature interval were studied. The results show that hardness of the 2Cr13 stainless steel after tempering at 490-550 ℃ is 40-50 HRC, the corresponding impact property shows a downward trend; After tempering at 570-620 ℃, the hardness of the 2Cr13 stainless steel is 30-38 HRC, the impact property gradually increases. Through the observation of the impact fracture morphology, after tempering at 490-560 ℃, the fracture mode first changes from cleavage fracture to intergranular fracture. With the increase of the tempering temperature, it eventually changes to a fracture mode along the grain+cleavage. Microscopically, the size of the fracture surface along the grain gradually decreases, and the number of cleavage gradually increases, which is manifested by the improvement of the impact performance on the macroscopic level. |
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| Keywords: | 2Cr13 stainless steel tempering brittleness impact property hardness |
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