新型超高强度钢应力腐蚀断裂行为研究

doi:CNKI:11-1929/V.20110107.1206.002

材料工程与机械制造

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新型超高强度钢应力腐蚀断裂行为研究

刘建华, 田帅, 李松梅, 于美

北京航空航天大学材料科学与工程学院, 北京 100191

收稿日期:2010-09-07 修回日期:2010-12-01 出版日期:2011-06-25 发布日期:2011-06-24
通讯作者: Tel.: 010-82317103 E-mail: liujh@buaa.edu.cn E-mail:liujh@buaa.edu.cn
作者简介:刘建华(1957- ) 男,博士,教授,博士生导师。主要研究方向:材料与装备的腐蚀科学与表面防护先进技术。 Tel:010-82317103 E-mail:liujh@buaa.edu.cn

Stress Corrosion Crack of New Ultrahigh Strength Steel

LIU Jianhua, TIAN Shuai, LI Songmei, YU Mei

School of Materials Science and Engineering, Beihang University, Beijing 100191, China

Received:2010-09-07 Revised:2010-12-01 Online:2011-06-25 Published:2011-06-24

摘要/Abstract

摘要： 采用恒载荷拉伸应力腐蚀实验研究了23Co14Ni12Cr3及40CrNi2Si2MoVA两种超高强度钢在质量分数为3.5%的NaCl溶液中的应力腐蚀开裂行为,为两种超高强度钢在结构件中的安全使用提供数据依据。通过金相显微镜和扫描电镜(SEM)对两种超高强度钢的显微组织以及断口形貌进行了分析。恒载荷拉伸应力腐蚀实验结果表明,23Co14Ni12Cr3钢在相同应力水平下的断裂时间比40CrNi2Si2MoVA钢的断裂时间长,这说明23Co14Ni12Cr3钢的抗应力腐蚀性能优于40CrNi2Si2MoVA钢。断口的形貌分析表明两种超高强度钢在应力和腐蚀介质的共同作用下发生断裂,断口显现出为沿晶断裂和韧窝断裂的形貌。

关键词: 超高强度钢, 拉伸应力腐蚀, 断裂行为, NaCl溶液, 断裂形貌

Abstract: The behavior of stress corrosion crack of two kinds of ultrahigh strength steel, 23Co14Ni12Cr3 and 40CrNi2Si2MoVA, in 3.5% NaCl solution are investigated with the constant load tensile stress corrosion method. The microstructure and fracture surface of the two ultrahigh strength steels are analyzed by metalloscopy and scanning electron microscopy (SEM). The results of constant load tensile stress corrosion test show that at the same stress level the fracture time of steel 23Co14Ni12Cr3 is longer than that of 40CrNi2Si2MoVA, which means 23Co14Ni12Cr3 possesses better corrosion resistance. The fracture morphology analysis shows that the fracture surface of the two ultrahigh strength steels has the characteristic of intergranular fracture and dimple fracture under the joint action of stress and corrosive solution.

Key words: ultrahigh strength steel, tensile stress corrosion, fracture behavior, NaCl solution, fracture morphology

中图分类号:

V250.3
TG174

刘建华, 田帅, 李松梅, 于美. 新型超高强度钢应力腐蚀断裂行为研究[J]. 航空学报, 2011, 32(6): 1164-1170.

LIU Jianhua, TIAN Shuai, LI Songmei, YU Mei. Stress Corrosion Crack of New Ultrahigh Strength Steel[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011, 32(6): 1164-1170.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

新型超高强度钢应力腐蚀断裂行为研究

Stress Corrosion Crack of New Ultrahigh Strength Steel

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