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| Effects of Rolling Parameters on Texture and Formability of High Strength Ultra-Low Carbon BH Steel |
| CHEN Yin-li1,SU Lan1,ZHAO Ai-min1,KUAI Zhen1,LI Ben-hai2,LIU Guang-ming2 |
1. Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China
2. Shougang Research Institute of Technology, Beijing 100041, China |
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Abstract The effects of hot rolling and cold rolling parameters on texture and r (plastic strain ratio) value of high strength ultra low carbon bake hardening (ULC-BH) steels are studied with orientation distribution function (ODF) structural analysis method. After hot rolling, the high strength ULC-BH steel sheet has weak ��-fiber with uniform orientation distributions, and weak ��-fiber, of which {445}<110> component forms a high intensity peak at coiling temperature of 750 ��. After cold rolling, both {111}<110>-{111}<112> intensity on the ��-fiber and {111}-{112}<110> intensity on the ��-fiber enhanced. As a result of substitutional solute elements Mn and P being added to the steel, strong {112}<110> deformation texture component is observed on ��-fiber, especially at 80% cold rolling reduction, and this leads to the strong {111}<112> recrystallization texture after annealing. The increase of cold rolling reduction shifts the maximum intensity on the ��-fiber from {111}<112> to {111}<113>. After annealing, a very strong ��-fiber is obtained, with intensity peak at {111}<112> component when cold rolling reduction reaches 80%. Increasing coiling temperature and cold rolling reduction improve ��-fiber intensity and r value, resulting in good deep drawability.
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Received: 15 November 2011
Published: 18 June 2013
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| Fund:Research and Industrialization of High Quality Steel Strip of SHOUGANG Group |
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Corresponding Authors:
Yinli CHEN
E-mail: yinli_chen@ustb.edu.cn
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2013, Vol. 20 
