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材料工程  2018, Vol. 46 Issue (5): 151-158    DOI: 10.11868/j.issn.1001-4381.2016.000938
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
SA508 Gr.3 Cl.1钢的疲劳和高温拉伸性能
王驰, 冉广, 雷鹏辉, 黄金华
厦门大学 能源学院, 福建 厦门 361102
Fatigue and High-temperature Tensile Properties of SA508 Gr.3 Cl.1 Steel
WANG Chi, RAN Guang, LEI Peng-hui, HUANG Jin-hua
College of Energy, Xiamen University, Xiamen 361102, Fujian, China
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摘要 测试和分析SA508 Gr.3 Cl.1钢在20~600℃范围内的拉伸性能与室温下的疲劳性能。结果表明:SA508 Gr.3 Cl.1钢由上贝氏体和碳化物组成,晶粒度为8.0级。钢基体中分布着粗系、moy级别为1.0级的D类球状氧化物,约占钢基体的0.0325%(体积分数)。钢基体中分布着大量平行与缠结的位错,除了大量碳化物颗粒外,还分布着底心正交晶体结构的Al6(Fe,Mn)析出相。钢的屈服强度、抗拉强度随温度的升高而降低,伸长率保持在20.2%~29.1%范围内,断面收缩率在20~300℃之间相对稳定,约为70%;而在300℃后明显升高,600℃的相应值达到90.2%。拉伸导致了钢基体的显微硬度升高,但其增加值随温度的升高而降低,600℃时为225HV。XRD分析表明拉伸并没有导致钢发生明显的相变。拉伸性能满足大型先进压水堆AP1000等堆内构件的性能要求。疲劳实验表明,在室温下钢的疲劳极限σ-1=268.64MPa,JΙC=331.2kJ/m2KIC=269.07MPa·m1/2
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王驰
冉广
雷鹏辉
黄金华
关键词 SA508 Gr.3 Cl.1钢拉伸性能疲劳性能微观组织堆内构件    
Abstract:Tensile behaviors at 20-600℃ and fatigue properties at room temperature of the SA508 Gr.3 Cl.1 steel were tested and analyzed. The results show that the SA508 Gr.3 Cl.1 is composed of upper bainite and carbide, the grain size is 8.0. Coarse D type ball oxide with moy level 1.0 which is distributed in the steel matrix is about 0.0325% (volume fraction) of the steel matrix. There are a large number of parallel and entangled dislocations distributing in the steel matrix, in addition to a large number of carbide particles, the precipitates are mainly Al6(Fe,Mn) particles with base-centered orthorhombic lattice. The yield strength and tensile strength decrease with the increase of temperature. The elongation remains at 20.2%-29.1%. The percentage reduction of area is relatively stable at 20-300℃, is about 70%; while it increases after 300℃, and the corresponding value reaches 90.2% at 600℃. Stretching results in the increase of microhardness of the steel matrix, but its value decreases with the increase of temperature, and the microhardness value is 225HV at 600℃. XRD analysis shows that stretching leads to no obvious phase transformation. The tensile properties meet the performance requirements of reactor internals in the large advanced PWR such as AP100 etc. The fatigue tests show that the fatigue limit of S-N curve of the steel is 268.64MPa. The average value of the JΙC is 331.2kJ/m2, and KIC is 269.07MPa·m1/2.
Key wordsSA508 Gr.3 Cl.1 steel    tensile property    fatigue property    microstructure    reactor internal
收稿日期: 2016-08-07      出版日期: 2018-05-16
中图分类号:  TG113.25  
通讯作者: 冉广(1978-),男,教授,博士生导师,从事材料辐照行为研究、新材料研发和构件寿命评估,联系地址:福建省厦门市翔安区翔安南路厦门大学翔安校区能源学院和木楼A317(361102),E-mail:gran@xmu.edu.cn     E-mail: gran@xmu.edu.cn
引用本文:   
王驰, 冉广, 雷鹏辉, 黄金华. SA508 Gr.3 Cl.1钢的疲劳和高温拉伸性能[J]. 材料工程, 2018, 46(5): 151-158.
WANG Chi, RAN Guang, LEI Peng-hui, HUANG Jin-hua. Fatigue and High-temperature Tensile Properties of SA508 Gr.3 Cl.1 Steel. Journal of Materials Engineering, 2018, 46(5): 151-158.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.000938      或      http://jme.biam.ac.cn/CN/Y2018/V46/I5/151
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