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.
[1] TAKECHI H. Metallurgy aspects on IF steel from industrial viewpoint [J].ISIJ Int,1994,34(1): 3-7.[2] SONG Y H, YAN Y N, ZHANG R J, et al, Manufacture of the die of an automobile deck part based on rapid prototyping and rapid tooling technology[J]. Journal of Materials Processing Technology,2002,120(1):237-242.[3] 胡卓超,蒋奇武,赵骧,等. 预回复对08Al深冲钢板再结晶组织及织构的影响[J]. 东北大学学报,2001,22(2):146-149.[4] 康永林.现代汽车板的质量控制与成形性[M]. 北京:冶金工业出版社,1999.[5] RAY R K,JONAS J J,HOOK R E. Cold rolling and annealing textures in low carbon and extra low carbon steels[J]. International Materials Reviews,1994,39(4):129-172.[6] SCHMID E,BOAS W. Plasticity of crystals[M]. London:F A Hughes & Co Limited,1950.[7] TUNG L K,QVADIR M Z,DUGGAN B J. A novel rolling-annealing cycle for enhanced deep drawing properties in IF steels[J]. Key Engineering Materials,2002,223-236:437-442.[8] ZHAO H,RAMA S C,BARBER G C,et al. Experimental study of deep drawability of hot rolled IF steel[J]. Journal of Materials Processing Technology,2002,128(1-3):73-79.[9] FLOWERS J W,KARAS Jr S P. Coalescence of sulfides during secondary growth in 3% silicon-iron[J]. J Appl Phys,1967,38(3):1085-1086.[10] SWIFT W M. Kinetics of MnS precipitate coarsening in 3pct Si-Fe sheet[J]. Metall Trans,1973,4(1):153-157.[11] RYUM N,HUNDERI O. On the analytic description of normal grain growth [J]. Acta Metall Mater,1989,37(5):1375-1379.[12] 刘永铨. 钢的热处理[M]. 北京:冶金工业出版社,1981.8.[13] 刘云旭. 金属热处理原理[M]. 北京:机械工业出版社,1981.31.