| 摘要 |
FIELD: metallurgy; production of wrought semi-finished products of complex shape from high strength aluminum alloys, such as frames, fittings, beams and other long-cut items mainly including longitudinal fins. ^ SUBSTANCE: proposed method includes casting the ingot, hot compaction of intermediate blank, hardening, straightening by tension and bending of blank, molding and aging of item. After casting, ingot is subjected to annealing at heating to temperature of 400-420°C holding at heat for 3 h followed by turning the ingot. According to some versions of invention, aging is performed in two-stage mode: heating to temperature 100-120°C holding at heat for 10-20 h and heating to temperature of 160-180°C holding at heat for 5-10 h. ^ EFFECT: improved mechanical properties of items; minimization of defects. ^ 6 cl, 1 tbl, 2 ex |
