A 7055 aluminum alloy flat row and its production process and application

Abstract

The invention provides a 7055 aluminum alloy flat bar and a production technology and application thereof and relates to the field of aluminum alloys. According to the production technology of the 7055 aluminum alloy flat bar, raw materials are prepared according to alloy element compositions of a 7055 aluminum alloy, and the raw materials are smelted and cast into cast rods; a double-stage homogenization system is adopted for carrying out homogenization treatment on the cast rods; the cast rods obtained after the homogenization treatment are subjected to extrusion treatment, and a product isobtained; the product is prestretched; a double-stage solid solution system is adopted for carrying out solid solution heat treatment on the prestretched product; the product is stretched and straightened within 6 hours after the solid solution heat treatment; a double-stage aging system is adopted for carrying out manual aging heat treatment on the product, and the production flow and technological parameters of the production technology of the 7055 aluminum alloy flat bar are standardized. The mechanical property, the electricity conductivity and the exfoliation corrosion performance of themade 7055 aluminum alloy flat bar meet the requirement of the AMS4336 standards, and the higher breaking tenacity value is obtained. The 7055 aluminum alloy flat bar is mainly applied to manufacturingof aero seat members.

Description

technical field

[0001] The invention relates to the field of aluminum alloys, and in particular to a 7055 aluminum alloy flat row and its production process and application. Background technique

[0002] 7055 aluminum alloy belongs to the Al-Zn-Mg-Cu series heat-treatable and strengthened multi-element aging alloy. It has the advantages of high strength, low density and good thermal processing performance. It is one of the main structural materials in the aerospace field and is suitable for manufacturing aircraft masks Skins, spars, bulkheads, landing gear components, and hydraulic system components, etc., are also used in other high-stress structural components that require high strength and good corrosion resistance. The alloy element composition of 7055 aluminum alloy includes: 0wt%-0.40wt% Si, 0wt%-0.50wt% Fe, 1.2wt%-2.0wt% Cu, 2.1wt%-2.9wt% Mg, 5.1wt% - 6.1 wt% Zn, 0 wt% - 0.30 wt% Mn, 0 wt% - 0.20 wt% Ti, 0.18 wt% - 0.28 wt% Cr; balance Al.

[0003] At present, the p...

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