利用MMS300热模拟试验机在温度为850~1 150℃,应变速率为5 s-1,道次间隔时间为1~400 s的条件下进行了X80及X100管线钢双道次压缩变形试验,测定了不同间隔时间、不同变形温度条件下的软化率。研究结果表明：当道次间隔时间相同时,随变形温度升高,X80及X100管线钢静态再结晶分数均增加,再结晶进程加快。X80及X100的静态再结晶激活能分别为308.7和341.8 kJ/mol。采用Avrami方程获得了X80及X100试验钢奥氏体静态再结晶动力学方程。
The hot deformation behaviors of X80 and X100 pipeline steels were investigated through double-hit compression experiments using MMS300 thermal-mechanical similar within the temperature range of 850-1 150 ℃,the strain rate of 5 s-1 and the pass interival range of 1-400 s,the softening fraction at different pass interval and deformation temperature was determined and analyzed.The results show that when pass intervals is the same,as deformation temperature increase,the volume fraction of static recrystallization of X80 and X100 pipeline steels increase and the recrystallization process is enhanced.Activation energy of austenite static recrystallization of X80 and X100 is 308.7 and 341.8 kJ/mol,respectively.The kinetic equation of static recrystallization of X80 and X100 pipeline steels by Avrami equation was obtained.
参考文献
| [1] | 李立科,郑茂盛,孙利军,毕宗岳,冯启华.热处理对X80管线钢组织性能的影响[J].焊管,2010(04):18-21. |
| [2] | 周民,马秋花,杜林秀,刘相华.X100管线钢的组织性能[J].东北大学学报（自然科学版）,2009(07):985-988. |
| [3] | ZHOU Min;DU Lin-xiu;LIU Xiang-hua .Microstrueture and Mechanical Properties of X80 Pipeline[J].Acta Metall Sin:Engl Lett,2010,23(02):171. |
| [4] | J. Y. Koo;M. J. Luton;N. V. Bangaru;R. A. Petkovic;D. P. Fairchild;C. W. Petersen;H. Asahi;T. Hara;Y. Terada;M. Sugiyama;H. Tamehiro;Y. Komizo;S. Okaguchi;M. Hamada;A. Yamamoto;I. Takeuchi .Metallurgical Design of Ultra High-strength Steels for Gas Pipelines[J].International journal of offshore and polar engineering,2004(1):2-10. |
| [5] | Terada Y;Tameh Iro H;Mor Imoto H.X100 Linepipe With Excellent HAZ Toughness and Deformability[A].Cancun:Asme Omae,2003:373. |
| [6] | Sang-Hyun CHO;Ki-bong KANG;John J. JONAS .Mathematical Modeling of the Recrystallization Kinetics of Nb Microalloyed Steels[J].ISIJ International,2001(7):766-773. |
| [7] | Fernandez A I;Uranga P;Lopez B et al.Dynamic Recrystallization Behavior Covering a Wide Austenite Grain Size Range in Nb and Nb-Ti Microalloyed Steels[J].Materials Science and Engineering,2003,361 A:367. |
| [8] | 刘相华;胡贤磊;杜林秀.轧制参数计算机模型及其应用[M].北京:化学工业出版社,2007 |
| [9] | 朱丽娟,吴迪,赵宪明.合金含量对热变形奥氏体组织演变的影响[J].东北大学学报（自然科学版）,2006(09):987-990. |
| [10] | Medina S F;Mancilla J E .Determination of Static Reerystallisation Critical Temperature ok Austenite in Microalloyed Steels[J].ISIJ International,1993,33(12):1257. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%