Determinition of Optimal Coiling Temperature and Cold Reduction Ratio of Adding P High Strength if Steel

Abstract:

Hot rolled adding P high strength IF steel sheet was used to study the effect of coiling temperature and cold reduction ratio on the microstructures , mechanical properties and textures of experimental steel. The experimental results showed that the recrystallization has finished after cold rolling followed diffrenent cold reduction ratio and coiling temperature was from 550 °C to 600 °C under experimental condition. When the cold reduction ratio was increased, the grain changed fine and uniformity under diffrenent coiling temperature; The yield strength, tensile strength and elongation percentage were approximate 160 MPa, 345 MPa and 35.0 % respectively, under coiling temperature 600 °C and diffrenent cold reduction ratio condition, the plastic strain ratio r value and the strain hardening exponent n value were reached the maximum, respectively, the r value was approximate 1.5, the n value was approximate 0.30. When the coiling temperature was increased, the {111}＜110＞ texture of α skeleton lines was stronger. Therefore, the suggested the optimal coiling temperature is 600 °C, cold reduction ratio was 60 % to 70 %, and it obtains optimally match of high strength and punching property.

• Periodical: Advanced Materials Research (Volume 213)
• Pages: 465-469
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.213.465
• Online since: February 2011
• Authors: Min Li Wang, Zhi Wang Zheng, Li Xiao
• Keywords: Coiling Temperature, Cold Reduction Ratio, High Strength IF Steel, Texture

References

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