研究了4种含不同微合金元素的X70管线钢的韧性，采用夏比冲击试验和落锤撕裂试验，借助金相显微镜（OM）、扫描电镜（SEM）与背散射电子衍射技术（EBSD）等手段，分析了微观组织、晶粒尺寸、晶粒取向及取向差和夹杂物等因素对X70管线钢韧性的影响。结果表明，含Mo、Ni元素的管线钢夏比冲击韧性和落锤性能都较好，含Cr元素的管线钢落锤性能偏低，大角度晶界比率越高，晶粒尺寸越细小，夹杂物含量越少的管线钢具有更高的韧性。
Toughness of four X70 pipeline steels with different composition was studied by using charpy impact test and dropweight tear test（ DWTT）. The effects of microstructure, grain size, grain orientation and misorientation angle distribution, and inclusions on toughness of the steels were analysed by means of optical microscope （ OM ） , scanning electrical microcopy （ SEM ） and the electron backscatter diffraction technique（EBSD）. The results show that the eharpy impact toughness and DWTT values of the pipeline steels containing Mo and Ni are higher, the DWTT values of pipeline steels containing Cr are unqualified. The toughness of X70 pipeline steels increases with higher ratio of large angle grain boundaries, less inclusions and finer effective grain size.
参考文献
| [1] | 郑磊,傅俊岩.高等级管线钢的发展现状[J].钢铁,2006(10):1-10. |
| [2] | 庄传晶,冯耀荣,霍春勇,李鹤林.国内X80级管线钢的发展及今后的研究方向[J].焊管,2005(02):10-14. |
| [3] | 王仪康,潘家华,杨柯,单以银.高性能输送管线钢[J].焊管,2007(01):11-16. |
| [4] | Shin SY;Hwang B;Kim S;Lee S .Fracture toughness analysis in transition temperature region of API X70 pipeline steels[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1-2):196-204. |
| [5] | K. Junhua;Z. Lin;G. Bin .Influence of Mo content on microstructure and mechanical properties of high strength pipeline steel[J].Materials & Design,2004(8):723-728. |
| [6] | 范跃华,樊新民,魏伟,单以银,杨柯.高强度管线钢连续冷却转变研究[J].材料热处理学报,2008(03):62-65. |
| [7] | 廖波,肖福仁.针状铁素体管线钢组织及强韧化机理研究[J].材料热处理学报,2009(02):57-62. |
| [8] | 李国宝,徐洪庆,彭海红.管线钢落锤性能的影响因素分析[J].宽厚板,2006(06):5-8. |
| [9] | 王路兵,任毅,张鹏程,武会宾,唐获.高级别管线钢X100的试验研究[J].钢铁,2008(01):80-84. |
| [10] | 张寿禄,赵泳仙,崔天燮,吴晓丹.应用EBSD研究X80管线钢的落锤撕裂性能[J].中国体视学与图像分析,2007(04):271-273. |
| [11] | 张小立,冯强,刘迎来,冯耀荣,姜晨光.二次加热对高钢级管线钢韧性及其组织的影响[J].材料热处理学报,2008(06):66-69. |
| [12] | 齐俊杰;黄运华;张跃.微合金化钢[M].北京:冶金工业出版社,2006 |
| [13] | Byoungchul Hwang;Yang Gon Kim;Sunghak Lee .Effective Grain Size and Charpy Impact Properties of High-Toughness X70 Pipeline Steels[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2005(8):2107-2114. |
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