Heat treatment method of high-strength and high-flexibility 7055 aluminum alloy
A heat treatment method and flexibility technology, applied in the field of heat treatment of high-strength and high-flexibility 7055 aluminum alloy, can solve the problems of difficult deformation, cracking of components, deformation of aluminum alloy components with high residual stress, etc.
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[0029] The 7055 aluminum alloy spray-formed ingot is extruded (extrusion ratio 14.8) into a Φ130mm bar after being wagoned, and the bar is roughly processed into a product blank, and the blank is subjected to heat treatment. The heat treatment steps are as follows:
[0030] a) Two-stage solid solution treatment, room temperature rises to 450°C for 2 hours, heats at 450°C for 3 hours, rises to 477°C in 0.5 hours, holds at 477°C for 3 hours, and quenches at 50°C.
[0031] b) T6 artificial aging treatment, the room temperature was raised to 120°C for 1 hour, and kept at 120°C for 24 hours.
[0032] c) High temperature stress relief aging, heat preservation at 140°C for 10 hours.
[0033] In the above examples, compared with the product blanks without high-temperature stress-relief aging, after high-temperature stress-relief aging, the deformation in the subsequent machining process is reduced, and the measured strength performance is basically maintained at the same level, while ...
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