Hot rolling and annealing of cast Fe-Al-Si-C alloy

0353228 - FZÚ 2011 RIV CZ eng J - Journal Article
Schindler, I. - Hanus, P. - Kopeček, Jaromír - Jarošová, Markéta - Kratochvíl, P. - Kozelský, P. - Kulveitová, H. - Rusz, S. - Subíková, M. - Cagala, M.
Hot rolling and annealing of cast Fe-Al-Si-C alloy.
Hutnické listy. Roč. 63, č. 4 (2010), 86-91. ISSN 0018-8069
R&D Projects: GA ČR(CZ) GAP107/10/0438
Institutional research plan: CEZ:AV0Z10100520; CEZ:AV0Z10100521
Keywords : iron aluminides * rolling * metallography * EBSD
Subject RIV: BM - Solid Matter Physics ; Magnetism
http://www.hutnickelisty.cz/images/dokumenty/obsah_hl_4_2010.pdf

The iron aluminides with an increased content of silicon and carbon are used for structural purposes in the cast state. A special method of hot rolling of laboratory castings from the alloy Fe – 29.5 Al – 0.47 Si – 1.16 C (wt. %) was developed, preventing the origin of surface cracks in contact with the cold work rolls and enabling forming this material with the extremely low plasticity. The structure of the initial castings is characterized by a large heterogeneity, as far as mainly the distribution, shape, size and orientation of carbides Al4C3 is concerned. After the multi-pass hot rolling, the structure with grains stretched in the direction of rolling was achieved. The long-term annealing at temperature 1200 °C led progressively to crumbling of the greatest formations and, vice versa, coarsening of the finest grains. The present aluminium carbides hamper the static recrystallization of the investigated material very effectively.
Permanent Link: http://hdl.handle.net/11104/0192531