Microstructure and Property Control of Hot Rolled DP600 Steel


Article Preview

Thermal mechanical experiment of step-cooling of 600MPa hot-rolled DP steel after compressed was carried out on Gleeble-1500 thermal mechanical simulator, using design of butterfly-shaped sample. Microstructure evolution during step-cooling and its effect on mechanical property of tested steel were analyzed. It is shown that, dual phase microstructure which martensite islands disperses in fine grain ferrite matrix is obtained by holding for 8~10s at 670°C followed accelerated cooling to 200°C. With increasing of holding time, grain size of ferrite coarsens, and volume fraction of ferrite has few changes. Meanwhile, tensile strengths of tested steel are all near 600MPa. That is to say, ferrite transformation is adequate during holding for 8~10s at 670°C and tensile strength of dual phase steel is stable accordingly.



Advanced Materials Research (Volumes 415-417)

Edited by:

Jinglong Bu, Zhengyi Jiang and Sihai Jiao




L. Y. Zhou et al., "Microstructure and Property Control of Hot Rolled DP600 Steel", Advanced Materials Research, Vols. 415-417, pp. 938-942, 2012

Online since:

December 2011




[1] Cole G. Magnesium research sponsored by EUCAR in Europe and USCAR in North America [R]. Pares of Sinomag Die Casting Magnesium Seminar, Beijing, 2000, 10.

DOI: https://doi.org/10.1002/3527607552.ch58

[2] Hopf B, Biemans C. Light-weight body-current status and future challenges [R]. Chinese-German Ultra-light Symposium, Beijing, 2001, 9: 201-207.

[3] MA Ming-tu, M. F. Shi. Advanced High Strength Steel and It's Applications in Automobile Industry [J]. Iron and steel, 2004, 39(7): 68-72.

[4] Tang Di, Mi Zheng-li, Cheng Yu-lai, et al. Technology and Research and Development of Advanced Automobile Steel Abroad [J]. 2005, 40(6): 1-5.

[5] Hong S C, Lee K S. Influence of deformation induced ferrite transformation on grain refinement of dual phase steel [J]. Materials Science and Engineering, 2002, A323: 148-159.

DOI: https://doi.org/10.1016/s0921-5093(01)01359-4