Effect of Second-phase Particles on Texture Evolution of Low Carbon Al-killed Steel
ZHUANG Dong-dong1, WANG Zuo-cheng1, ZHANG Jian-qiang1, CHEN Kun2, LIU Jin-yuan2, GU Guo-gang2
1. Key Laboratory for Liquid-solid Structural Evolution & Processing of Materials (Ministry of Education),Shandong University,Jinan 250061, China;
2. Taishan Iron and Steel Company,Laiwu 271100,Shandong,China
Abstract：Microstructure, mechanical properties and the content of different types of texture were investigated by means of TEM, tensile test and XRD. After cold rolling of 73% overall reduction and annealing at 700℃ for 4h, yield strength, tensile strength and r value of 2# sample is 28MPa higher, 19MPa higher and 0.24 lower than those of 1# sample. The results show that the content of the texture of {111} for 1# sample increases obviously after the cold rolling and annealing process, the content of texture of Goss decreases, and texture strength of {100} increases after the cold rolling process and decreases after the annealing process obviously. The precipitation of Al2O3 particles in 2# sample during the annealing process inhibits the precipitation of AlN particles, changes the mechanism of nucleation as nuclear particle shape. The increasing texture content of {100} and Goss, decreasing texture content of {111}, reducing value of r after annealing, which are not beneficial to deep-drawing performance. At the same time, small Al2O3 particles causes fine-grain strengthening and precipitation strengthening, and yield strength and tensile strength obviously increase.
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2012, Vol. 0 
