| 凝结水泵主轴断裂分析 |
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| 引用本文： | 彭碧草,何朋非,熊亮,龙毅.凝结水泵主轴断裂分析[J].矿冶工程,2015,35(3):138-140. |
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| 作者姓名： | 彭碧草 何朋非 熊亮 龙毅 |
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| 作者单位： | 1.国网湖南省电力公司电力科学研究院, 湖南 长沙 410007;
2.湖南省湘电锅炉压力容器检验中心有限公司, 湖南 长沙 410004 |
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| 摘 要： | 采用宏观检查、化学成分分析、力学性能测试、显微组织观察和扫描电镜等试验方法, 对某火电厂凝结水泵主轴断裂的原因进行了分析。结果表明, 凝结水泵主轴的原材料存在成分偏析是大轴断裂的主要原因; 主轴原材料发生成分偏析后通过简单的热处理工艺未得到均匀的调质组织, 从而导致材料力学性能下降; 同时缩孔的存在给疲劳源的产生创造了条件。
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| 关 键 词： | 疲劳断裂 失效分析 成分偏析 缩孔 40CrNiMo |
| 收稿时间： | 2014-12-21 |
Analysis on Fracture of Spindle of Condensate Pump |
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| PENG Bicao,HE Pengfei,XIONG Liang,LONG Yi.Analysis on Fracture of Spindle of Condensate Pump[J].Mining and Metallurgical Engineering,2015,35(3):138-140. |
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| Authors: | PENG Bicao HE Pengfei XIONG Liang LONG Yi |
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| Affiliation: | 1.State Grid Hunan Electric Power Company Research Institute, Changsha 410007, Hunan, China;
2.Hunan Xiangdian Boiler Pressure Vessel Tests Center Co Ltd, Changsha 410004, Hunan, China |
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| Abstract: | The reasons for the fracture of condensate pump spindle of a power station were investigated by macro examination, chemical composition analysis, mechanical tests, microstructure observation and SEM. The results showed that composition segregation of the spindle material was the critical reason for the fracture. Uniform microstructure of the material was not obtained by simple quenching and tempering after the segregation, which caused the decrease of mechanical properties. Moreover, the existence of shrinkage cavity was benefit to the growth of fatigue source. |
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| Keywords: | fatigue fracture failure analysis composition segregation shrinkage cavity 40CrNiMo |
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