Effect of Coiling Temperature and Cold Reduction Ratio on Microstructure and Mechanical Property of Nb Microalloying Added Phosphorus High Strength IF Steel

Abstract:

Nb microalloying added phosphorus high strength IF steel was used to study the effect of coiling temperature and cold reduction ratio on the microstructures and mechanical properties. The experimental results showed that the recrystallization had finished. Under coiling temperature 650°C and cold reduction ratio 75%, and under coiling temperature 600°C or 700°C and cold reduction ratio 65%, the yield strength, tensile strength were lower , the elongation was higher. The plastic strain ratio r value and the strain hardening exponent n value were reached the higher value, respectively, the r value was approximate 1.8, and the n value was approximate 0.26. Therefore, the suggested the optimal coiling temperature is 700°C, cold reduction ratio is 65% to 75%, and it is optimal process of Nb microalloying added phosphorus high strength.

• Periodical: Advanced Materials Research (Volumes 393-395)
• Pages: 54-57
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.393-395.54
• Online since: November 2011
• Authors: Min Li Wang, Zhi Wang Zheng, Li Xiao
• Keywords: Coiling Temperature, Cold Reduction Ratio, High Strength IF Steel, Microstructure, Nb Microalloying

References

[1] Zuo Jun, Chang Jun, Zhang Kaihua, et al. Reserch of Batch Annealing Process for Cold Rolled Adding P High Strength IF Steel Plate[J]. Steel Rolling, 2009, 26 (6): 9-1.

[2] Ma Yanwei, Wang Xianjin, Kong Bingyu, et al. The Production Ttechnology of Suggestions for Improvement. Of Baosteel IF Steel[J] . iron and steel, 1998, 33(6): 32-36.

[3] Zhu Jing, Liu Shuai, Jia Weiping, et al. Effect of Annealing Process on Microstructure and Properties of Ti+Nb-IF Steel [J]. Hot Working Technology, 2008, 37 (22): 59-63.