|
|
|
| Effect of Intercritical Annealing Parameters on Dual Phase Behavior of Commercial Low-Alloyed Steels |
| H��seyin AYDIN |
|
|
|
|
Abstract It is known that dual phase (DP) heat treatments and alloying elements have a strong effect on martensitic transformations and mechanical properties. In the present work, the effects of some intercritical annealing parameters (heating rate, soaking temperature, soaking time, and quench media) on the microstructure and mechanical properties of cold rolled DP steel were studied. The microstructure of specimens quenched after each annealing stage, was analyzed using optical microscopy. The tensile properties, determined for specimens submitted to complete annealing cycles, are influenced by the volume fractions of multi phases (originated from martensite, bainite and retained austenite), which depend on annealing processing parameters. The results obtained showed that the yield strength (YS) and the ultimate tensile strength (UTS) increase with the increasing intercritical temperature and cooling rate. This can be explained by higher martensite volume ratio with the increased volume fraction of austenite formed at the higher temperatures and cooling rates. The experimental data also showed that, for the annealing cycles carried out, higher UTS values than ~ 800 MPa could be obtained with the S3 steel grade.
|
|
Received: 25 December 2008
|
|
|
|
| [1] |
She-ming JIANG,Shi-jie FENG,,Xun-hua YUAN,Yuan-peng LI,Zhen-hua LI,Qi-fu ZHANG. Influence of Oxide Morphologies on Galvanizability of Third Generation Automotive Steel[J]. Chinese Journal of Iron and Steel, 2014, 21(11): 1059-1064. |
| [2] |
M Balakrishnan,V Balasubramanian,G Madhusudhan Reddy. Effect of Hardfaced Interlayer Thickness and Low Hydrogen Ferritic Capping on Ballistic Performance of Shielded Metal Arc Welded Armour Steel Joints[J]. Chinese Journal of Iron and Steel, 2013, 20(12): 82-91. |
| [3] |
D Senthilkumar,I Rajendran. Influence of Shallow and Deep Cryogenic Treatment on Tribological Behavior of En 19 Steel[J]. Chinese Journal of Iron and Steel, 2011, 18(9): 53-59. |
| [4] |
R Gonz��lez;J O Garc��a;M A Barb��s;et al. Ultrafine Grained HSLA Steels for Cold Forming[J]. Chinese Journal of Iron and Steel, 2010, 17(10): 50-56. |
|
|
|
|
2010, Vol. 17 
