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《Physical Testing and Chemical Analysis(Part A:Physical Testing)》 2011-01
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Determination of Optimal Coiling Temperature and Cold Reduction Ratio of Adding Phosphorus High Strength Ti-IF Steel

WANG Min-li 1,ZHENG Zhi-wang 1,XIAO Li 2 (1.Pangang Group Research Institute Co.,Ltd.,Chengdu 611731,China;2.Hot Strip Mill of Pangang Group Panzhihua Steel & Vanadium Co.,Ltd.,Panzhihua 617062,China)  
Hot rolled adding phosphorus high strength Ti-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 had finished after cold rolling followed diffrenent cold reduction ratio and coiling temperature was from 550 ℃ to 600 ℃ 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 ℃ 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 was 600 ℃,cold reduction ratio was 60% to 70%,and it obtained optimally match of high strength and punching property.
【CateGory Index】: TG335.12
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