通过热模拟技术与显微分析方法研究了二次热循环对X100管线钢粗晶热影响区组织的影响规律,再热粗晶区的性能通过夏比V型缺口冲击试验表征。试验结果表明,当二次热循环的峰值温度处于（α＋γ）两相温区,试验钢的临界粗晶热影响区出现局部脆化。局部脆化的原因主要有两个：一是临界粗晶热影响区组织粗化;另一是该区MA组元数量多,尺寸大,硬度高。
Influence of secondary thermal cycle on microstructure of coarse grain heat-affected zone（CGHAZ） in a X100 pipeline steel was investigated by means of thermal simulation technique and microscopic analysis method.The property of the reheated CGHAZ was characterized by Charpy V-notch impact test.The results indicate that the experimental steel exhibits local brittleness of intercritically reheated CGHAZ when the peak temperature of secondary thermal cycle is in the（α＋γ） range.There are two main reasons for the local brittleness.The first is the microstructure of intercritically reheated coarse-grained heat-affected zone（ICCGHAZ） is coarse.The second is ascribed to the large amount of coarse M-A lands with high hardness in the ICCGHAZ.
参考文献
| [1] | 李红卫,彭云,何长红,田志凌.X60钢级管线钢焊接热影响区的热模拟研究[J].钢管,2008(03):18-23. |
| [2] | 徐学利,辛希贤,石凯,周勇.焊接热循环对X80管线钢粗晶区韧性和组织的影响[J].焊接学报,2005(08):69-72. |
| [3] | 高珊,郑磊,章传国.超高强度系列管线钢厚板的研制[J].世界钢铁,2009(05):1-6. |
| [4] | Shome M;Gupta O P;Mohanty O N .Effect of simulated thermal cycles on the microstructure of the heat-affected zone in HSLA-80 and HSLA-10 steelplates[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2004,35(03):985-996. |
| [5] | 高惠临,董玉华,R.W.Hendricks.超低碳QT钢焊接二次热循环的组织转变与局部脆化[J].金属学报,2001(01):34-38. |
| [6] | 陈玉华,王勇.二次热循环对管线钢在役焊接粗晶区显微组织的影响[J].北京科技大学学报,2008(09):1002-1005. |
| [7] | 刘恒,高惠临,丁学光.焊接热循环对X80管线钢粗晶区组织性能的影响[J].热加工工艺,2007(07):4-6. |
| [8] | 王传武,高惠临.焊接二次热循环峰值温度对X80级管线钢组织性能的影响[J].焊管,2007(03):15-18. |
| [9] | 郑磊,傅俊岩.高等级管线钢的发展现状[J].钢铁,2006(10):1-10. |
| [10] | 王路兵,武会宾,任毅,张鹏程,唐荻.终冷温度对X100管线钢组织与性能的影响[J].热加工工艺,2007(14):21-23,26. |
| [11] | 高惠临.管线钢-组织性能与焊接行为[M].西安:陕西科学技术出版社,1995:130. |
| [12] | Yakubtsov, IA;Boyd, JD .Effect of alloying on microstructure and mechanical properties of bainitic high strength plate steels[J].Materials Science and Technology,2008(2):221-227. |
| [13] | Shanmugam S;Ramisetti NK;Misra RDK;Hartmann J;Jansto SG .Microstructure and high strength-toughness combination of a new 700 MPa Nb-microalloyed pipeline steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):26-37. |
| [14] | 刘文月,任毅,王爽,张帅.850MPa级管线用钢板的焊接热模拟试验研究[J].金属热处理,2011(04):54-57. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%