| 42CrMo钢磨煤机撑杆断裂原因分析 |
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| 引用本文： | 牟申周,谢亿,陈红冬.42CrMo钢磨煤机撑杆断裂原因分析[J].湖南电力,2012,32(4):42-44. |
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| 作者姓名： | 牟申周 谢亿 陈红冬 |
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| 作者单位： | 1. 湖南省湘电锅炉压力容器检验中心有限公司,湖南长沙,410007
2. 湖南省电力公司科学研究院,湖南长沙,410007 |
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| 摘 要： | 采用金相试验、化学成分分析、力学性能试验和断口扫描电镜试验等方法,对某电厂磨煤机撑杆断裂原因进行分析。结果表明：母材金相显微组织含有较粗大马氏体,拉伸性能劣化与冲击韧性差,导致磨煤机撑杆在运行时发生准解理脆性断裂。
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| 关 键 词： | 磨煤机撑杆 42CrMo 准解理断裂 金相试验 力学性能试验 |
Cause analysis on fracture of 42CrMo steel brace rod of coal pulverizer |
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| MOU Shen-zhou
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XIE Yi
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CHEN Hong-dong.Cause analysis on fracture of 42CrMo steel brace rod of coal pulverizer[J].Hunan Electric Power,2012,32(4):42-44. |
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| Authors: | MOU Shen-zhou XIE Yi CHEN Hong-dong |
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| Affiliation: | 1.Hunan Xiangdian Boiler Pressure Inspection Center Co.,Ltd,Changsha 410004,China; 2.Hunan Electric Power Corporation Research Institute,Changsha 410007,China) |
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| Abstract: | The fracture causes of brace rod of coal pulverizer were analyzed by using microscopic test,chemical composition analysis,mechanical properties and fracture test with scanning electron microscopy and other methods.The results show that there was coarse martensite microstructure in the base metal of coal pulverizer’s brace rod,and tensile properties deterioration and toughness impact poverty lead to the occurrence of brittle quasi-cleavage fracture in coal pulverizer’s brace rod during operation. |
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| Keywords: | brace rod of coal pulverizer 42CrMo quasi-cleavage fracture microscopic examination mechanical property test |
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