METHOD OF THERMOMECHANICAL TREATMENT OF SEMI-FINISHED PRODUCTS MADE FROM ALUMINUM ALLOYS
FIELD: metallurgy of aluminum-based alloys, alloys of Al-Mg-Li inclusive; manufacture of thin-walled semi-finished products for stringer and load-bearing primary structure of fuselage in riveted and welded structural members. ^ SUBSTANCE: proposed method includes hot deformation and hardening perfor...
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Main Authors | , , , , , |
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Format | Patent |
Language | English Russian |
Published |
20.07.2005
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Summary: | FIELD: metallurgy of aluminum-based alloys, alloys of Al-Mg-Li inclusive; manufacture of thin-walled semi-finished products for stringer and load-bearing primary structure of fuselage in riveted and welded structural members. ^ SUBSTANCE: proposed method includes hot deformation and hardening performed at one heat and followed by cold plastic deformation. Hot deformation is performed at degree not less than 82%; then cooling in air performed at rate of 0.3-10°C/s; cold plastic deformation is performed at degree not exceeding 4%. In specific cases, hot deformation and hardening may be performed at one heat at temperature of 380-480°C; after cold plastic deformation, one- or three-stage artificial aging is performed; at one-stage aging, heating is performed at 115-125°C and holding is continued for 5-12 h; at three-stage aging, heating at first stage is performed at 80-90°C and at holding continued for 3-6 h; at second stage, heating is performed at 115-125°C and at holding continued for 10-16 h; at third stage, heating is performed at 95-105°C and at holding continued for 10-12 h. ^ EFFECT: improved strength, plasticity and corrosion resistance characteristics. ^ 5 cl, 2 tbl, 1 ex |
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Bibliography: | Application Number: RU20040109932 |