|
|
|
| Microstructures and Mechanical Property of Low Carbon Manganese Steel With |
| LI Long1); DING Hua1;2); DU Linxiu2);SONG Hongmei3); ZHENG Fang3) |
| 1) School of Materials and Metallurgy; Northeastern University; Shenyang 110004 2) The State Key Lab. of Rolling and Automation; Northeastern University; Shenyang 110004 3) Baosteel Technology Center; Baoshan Iron & Steel Group Co.; Shanghai 201900 |
|
Cite this article:
LI Long; DING Hua; DU Linxiu; SONG Hongmei; ZHENG Fang. Microstructures and Mechanical Property of Low Carbon Manganese Steel With. Acta Metall Sin, 2006, 42(11): 1227-1232 .
|
|
|
Abstract Thermo-mechanical controlled process (TMCP) experiments with various finish rolling temperature (FRT) and coiling temperature (CT) have been carried out on a low carbon manganese steel at temperatures above Ar3. OM and TEM observations indicate that the ferrite in uniform distribution and a certain amount of bainite could be obtained. Deformation induced ferrite transformation (DIFT) occurred when the FRT decreased to 800℃. Accelerated cooling (60℃/s) to 400℃ (CT) refines the allotriomorphic ferrite grain but retards the nucleation of intragranular ferrite with its distribution on prior austenite grain boundary as well as the volume fraction of bainite increased, and the strength increased but the elongation decreased and yield ratio became much higher on the steel. The good combination of mechanical properties of the steel with grain boundary allotriomorphic ferrite/banite could be gained by controlling FRT (800℃-850℃), cooling rate (40℃/s) and CT (550℃), in which ferrite grain size was about 8-8.5µm and the volume fraction of bainite about 20%.
|
|
Received: 02 March 2006
|
|
|
[1] Dong H, Sun X J, Liu Q Y, Weng Y Q. Iron Steel, 2003; 38(10): 57 (董瀚,孙新军,刘清友,翁宇庆．钢铁,2003;38(10):57)
[2] Matsumura Y, Yada H. Trans Iron Steel Inst Jpn, 1987; 27: 492
[3] Hodgson P D, Hickson M R, Gibbs R K. Scr Mater, 1999; 40: 1179
[4] Hickson M R, Gibbs R K, Hodgson P D. ISIJ Int, 1999; 39: 1176
[5] Han B Q, Yue S. J Mater Process Technol, 2003; 136: 100
[6] Xu P G, Fang H S, Bai B Z, Wang Z L, Yang Z G, Huang J G. J Iron Steel Res Int, 2002; 9(2): 33
[7] Wang J P, Yang Z G, Bai B Z, Fang H S. Mater Sci Eng, 2004; A369: 112
[8] Xu P G, Fang H S, Bai B Z, Yang Z G. Acta Metall Sin, 2002; 38: 255 (徐平光,方鸿生,白秉哲,杨志刚．金属学报,2002;38:255)
[9] Wang G D, Liu X H, Li W J, Du L X, Zhang H M. Iron Steel, 2001; 36(5): 39 (王国栋,刘相华,李维娟,杜林秀,张红梅．钢铁,2001;36(5): 39)b |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
