| 马氏体与贝氏体组织GC—4超高强度钢的腐蚀疲劳裂纹扩展 |
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| 引用本文： | 刘晓坤,王建军,路民旭,金石,傅祥炯.马氏体与贝氏体组织GC—4超高强度钢的腐蚀疲劳裂纹扩展[J].金属学报,1993,29(12):27-33. |
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| 作者姓名： | 刘晓坤 王建军 路民旭 金石 傅祥炯 |
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| 作者单位： | 西安石油学院机械系，西安石油学院，西北工业大学，西北工业大学，西北工业大学 讲师，西安710061，西安710061 |
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| 摘 要： | 本文研究了马氏体组织与贝氏体组织４０ＣｒＭｎＳｉＭｏＶＡ（ＧＣ－４）超高强度钢的腐蚀疲劳（ＣＦ）裂纹扩展特性及机理。结果表明，不显微组织状态下，ＧＣ－４钢在３．５ＮａＣｌ溶液中的ＣＦ裂纹扩展曲线上，都出现了类似于应力腐蚀的平台区，而且马氏体组织ＧＣ－４钢的平台区裂纹扩展速度远大于贝氏体组织。断口分析与理论研究表明，氢脆在ＧＣ－４钢的腐蚀疲劳中起重要作用。
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| 关 键 词： | 腐蚀疲劳 裂纹扩展 超高强度钢 |
CORROSION FATIGUE CRACK PROPAGATION OF MARTENSITIC AND BAINITIC GC-4 ULTRA-HIGH STRENGTH STEEL |
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| LIU Xiaokun,WANG Jianjun,LU Minxu,JIN Shi,FU Xiangjiong Xi''''an Petroleum Institute Northwestern Polytechnical University,Xi''''an.CORROSION FATIGUE CRACK PROPAGATION OF MARTENSITIC AND BAINITIC GC-4 ULTRA-HIGH STRENGTH STEEL[J].Acta Metallurgica Sinica,1993,29(12):27-33. |
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| Authors: | LIU Xiaokun WANG Jianjun LU Minxu JIN Shi FU Xiangjiong Xi'an Petroleum Institute Northwestern Polytechnical University Xi'an |
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| Abstract: | The property and mechanism of corrosion fatigue (CF) crack propagation ofmartensitic and bainitic 40CrMnSiMoVA (GC-4) ultra-high strength steel was investigated.There is a platform region on CF crack propagation curve of the GC-4 steel with differentmicrostructure in 3.5% NaCl solution, which is similar to its stress corrosion crackingbehaviour. The CF crack propagation rate (in platform region) of martensitic GC-4 steel ismuch higher than that of bainitic one. Through fracture surface examination and theoreticalanalysis, it is revealed that hydrogen embrittlement plays an important role in the CF pro-cess of GC-4 steel. |
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| Keywords: | martensite bainite corrosion fatigue crack propagation rate hydrogen embrittlement steel 40CrMnSiMoVA steel GC-4 |
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