X90/X100管线钢超声疲劳断口分析
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摘要
超声疲劳试验方法可以在很短的时间周期内获得完整疲劳断口,而如果试样在断面最大夹杂物部位起裂,即有可能表征出夹杂物尺寸与X90/X100管材疲劳性能之间的关系。通过超声疲劳断口的扫描电镜观察结果表明,在断口上裂纹源区未见夹杂物,裂纹萌生于样品表面。说明对于X90/X100管线钢,较容易通过塑性变形,消耗夹杂物引起的应力集中,所以不容易从夹杂物处萌生疲劳裂纹;对于高强度材料,不容易通过塑性变形消耗夹杂物引起的应力集中,夹杂物的强度本身低于基体,所以容易在夹杂物物萌生疲劳裂纹并最终导致其疲劳裂纹。此外,X90/X100管线钢疲劳断口在超声疲劳过程中的散热状况较差,导致局部发热也可能是导致超声疲劳断口在试样表面起源的重要因素。
Ultrasonic fatigue test can obtain a complete fatigue fracture in a short time. However, if the specimen starts to crack at the largest inclusion part of the section, the relationship between the size of inclusions and the fatigue properties of X90/X100 pipeline steel can be characterized. SEM observation of ultrasonic fatigue fracture showed that there was no inclusion in the crack source area, and the crack started at the sample surface. This indicates that for X90/X100 pipeline steel, it is easy to consume the stress concentration induced by inclusion through plastic deformation, and therefore fatigue cracks are not easy to start from inclusions; For high strength materials, it is not easy to consume the stress concentration induced by inclusion through plastic deformation, and because the strength of the inclusions is lower than that of matrix, fatigue cracks are easy to start from the inclusions. In addition, the heat dissipation condition of X90/X100 pipeline steel during ultrasonic fatigue is poor, and the local heating may also be an important factor of crack origin at the surface of the specimen.
Ultrasonic fatigue test can obtain a complete fatigue fracture in a short time. However, if the specimen starts to crack at the largest inclusion part of the section, the relationship between the size of inclusions and the fatigue properties of X90/X100 pipeline steel can be characterized. SEM observation of ultrasonic fatigue fracture showed that there was no inclusion in the crack source area, and the crack started at the sample surface. This indicates that for X90/X100 pipeline steel, it is easy to consume the stress concentration induced by inclusion through plastic deformation, and therefore fatigue cracks are not easy to start from inclusions; For high strength materials, it is not easy to consume the stress concentration induced by inclusion through plastic deformation, and because the strength of the inclusions is lower than that of matrix, fatigue cracks are easy to start from the inclusions. In addition, the heat dissipation condition of X90/X100 pipeline steel during ultrasonic fatigue is poor, and the local heating may also be an important factor of crack origin at the surface of the specimen.
引文
[1]Murakami Y,Nomoto T,Ueda T.Factors influencing the mechanism of superlong fatigue failure in steels[J].Fatigue and Fracture of Engineering Materials and Structures,1999,22(7):581-590.
[2]李晓源,时捷,董瀚.夹杂物特征参数对40Cr Ni2Mo钢塑性的影响[J].材料研究学报,2010,24(1):91-96.
[3]Wilson A D.Proceedings of the 1998 symposium on advances in the production and use steel with Improved internal cleanliness[C].Atlanta:ASTM Special Technical Publication,1999.
[4]刘中柱,蔡开科.纯净钢生产技术[J].钢铁,2000,35(2):64-69.
[5]Zhang L F,Brian G T.State of the art in the control of inclusions during steel ingot casting[J].Metallurgical and Materials Transaction B,2006,37B(10):733-747.
[6]F.奥斯特.钢冶金学[M].北京:冶金工业出版社,1997:342-360.
[7]王建军,包燕平,曲英.中间包冶金学[M].北京:冶金工业出版社,2001:106-308.
[8]陈国军,雷洪.湍流控制器对异型中间包夹杂物去除的影响[J].炼钢,2010,26(3):51-70.
[9]战东平,张慧书.超低硫X65管线钢中非金属夹杂物研究[J].铸造技术,2006,27(9):906-909.
[10]苏晓峰,陈伟庆.X70管线钢中夹杂物控制研究[J].河南冶金,2009,17(1):14-16.
[11]吴雨晨,李俊国.X70管线钢铸坯中非金属夹杂物的研究[J].钢铁钒钛,2009,30(3):44-49.
[12]常桂华,栗红.管线钢冶炼过程夹杂物行为研究[J].冶金丛刊,2009(2):5-7.
[13]王国承,黄浪.铁水预处理·80t LD·RH-LF-CC生产流程对管线钢夹杂物的影响[J].特殊钢,2009,30(5):31-33.
[14]陈露,肖志瑜,陆宇衡.温压Fe-2Cu-0.5Mn-1C烧结材料超声疲劳研究[J].粉末冶金技术,2014,32(5):352-356.
[15]LU Yuheng,XIAO Zhiyu,HU Lei,et al.Ultra-high cycle fatigue behavior of warm compaction Fe-Cu-Ni-Mo-C sintered material[J].Materials and Design,2014,55(2):758-763.
[16]陆宇衡.高性能铁基粉末冶金烧结材料制备、性能及超声疲劳行为研究[D].广州:华南理工大学,2014:91-118.
[2]李晓源,时捷,董瀚.夹杂物特征参数对40Cr Ni2Mo钢塑性的影响[J].材料研究学报,2010,24(1):91-96.
[3]Wilson A D.Proceedings of the 1998 symposium on advances in the production and use steel with Improved internal cleanliness[C].Atlanta:ASTM Special Technical Publication,1999.
[4]刘中柱,蔡开科.纯净钢生产技术[J].钢铁,2000,35(2):64-69.
[5]Zhang L F,Brian G T.State of the art in the control of inclusions during steel ingot casting[J].Metallurgical and Materials Transaction B,2006,37B(10):733-747.
[6]F.奥斯特.钢冶金学[M].北京:冶金工业出版社,1997:342-360.
[7]王建军,包燕平,曲英.中间包冶金学[M].北京:冶金工业出版社,2001:106-308.
[8]陈国军,雷洪.湍流控制器对异型中间包夹杂物去除的影响[J].炼钢,2010,26(3):51-70.
[9]战东平,张慧书.超低硫X65管线钢中非金属夹杂物研究[J].铸造技术,2006,27(9):906-909.
[10]苏晓峰,陈伟庆.X70管线钢中夹杂物控制研究[J].河南冶金,2009,17(1):14-16.
[11]吴雨晨,李俊国.X70管线钢铸坯中非金属夹杂物的研究[J].钢铁钒钛,2009,30(3):44-49.
[12]常桂华,栗红.管线钢冶炼过程夹杂物行为研究[J].冶金丛刊,2009(2):5-7.
[13]王国承,黄浪.铁水预处理·80t LD·RH-LF-CC生产流程对管线钢夹杂物的影响[J].特殊钢,2009,30(5):31-33.
[14]陈露,肖志瑜,陆宇衡.温压Fe-2Cu-0.5Mn-1C烧结材料超声疲劳研究[J].粉末冶金技术,2014,32(5):352-356.
[15]LU Yuheng,XIAO Zhiyu,HU Lei,et al.Ultra-high cycle fatigue behavior of warm compaction Fe-Cu-Ni-Mo-C sintered material[J].Materials and Design,2014,55(2):758-763.
[16]陆宇衡.高性能铁基粉末冶金烧结材料制备、性能及超声疲劳行为研究[D].广州:华南理工大学,2014:91-118.
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