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Microstructure and Properties of Ti and Ti+Nb Ultra-Low-Carbon Bake Hardened Steels |
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| Authors: | CHEN Ji-ping KANG Yong-lin HAO Ying-min LIU Guang-ming XIONG Ai-ming |
| Affiliation: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, State Key Laboratory for Advanced Metals and Materials, Beijing 100083, China 2. School of Materials Science and Engineering, University of Science and Technology Beijing, State Key Laboratory for Advanced Metals and Materials, Beijing 100083, China;Shougang Research Institute of Technology, Beijing 100041, China 3. Shougang Research Institute of Technology, Beijing 100041, China |
| Abstract: | Hot rolling, cold rolling and continuous annealing processes of Ti bearing and Ti+ Nb stabilized ultra-low-carbon bake hardened steels were experimentally studied. The microstrueture and texture evolution, as well as the morphology, size and distribution of second phase precipitates during hot roiling, cold rolling and continuous annea-ling were also analyzed. The results showed that the size of NbC precipitates in Ti+ Nb stabilized ultra-low-carbon bake hardened steel was smaller than that of TiC precipitates in Ti bearing ultra-low-carbon bake hardened steel, which made the average grain size of Ti+ Nb stabilized ultra-low-carbon bake hardened steel finer than that of Ti bearing ultra-low-carbon bake hardened steel; for the yield strength, the former was higher than the latter; but for the γ value which reflects the deep-drawing performance, the former was lower than the latter. |
| Keywords: | ultra-low-carbon bake hardened steel texture microstructure mechanical property |
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