Compaction processing method used for spray forming superhigh-intensity aluminum alloy material

Abstract

The invention discloses a compaction processing method used for a spray forming superhigh-intensity aluminum alloy material, and belongs to the metal material processing technology field. A superhigh-intensity aluminum alloy blank after spraying forming is subjected to covering and air pumping processing and then is placed in a hot isostatic pressing furnace, vacuum-pumping, heating and pressurization are carried out, thermal insulation and pressure maintaining compaction processing is carried out, the scopes of the parameters of the compaction processing are as follows: the temperature is 440-475 DEG C, the pressure intensity is 80-120MPa, and the maintaining time is 0.5-24h. The provided method is advantageous in that structural defects in the spray forming ingot blank can be eliminated effectively, the material compactness is raised, the problem can be avoided that an exterior of a spray forming ingot blank is oxidized by a high temperature and defects are exacerbated further in a high temperature long-time homogenization thermal insulation process in the prior art, material structure and performances are improved substantially, and quality consistency and reliability of final products are raised.

Description

technical field [0001] The invention relates to a densification treatment method for spray-forming ultra-high-strength aluminum alloy materials, and belongs to the technical field of metal material processing. Background technique [0002] Al-Zn-Mg-Cu series (7xxx series) alloys are typical representatives of high-strength aluminum alloys, and their appearance can be traced back to the 1930s. The modernized 7075 and B95 high-strength aluminum alloys are widely used in the manufacture of aircraft parts instead of duralumin, which is commonly used in the aircraft industry. In the 1960s, on the basis of optimizing the traditional preparation and processing technology, by changing the types and contents of various trace elements in the 7xxx series aluminum alloys, and studying the new heat treatment process of the alloy, a variety of alloys with good performance were developed. High-strength aluminum alloys, including 7175, 7475, etc., are used to manufacture various aircraft f...

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Problems solved by technology

[0005] Aiming at a series of problems in the prior art such as the formation of new flake-like oxide layer defects during long-term high-temperature homogenization annealing of the defects in the deposited blank, and the incomplete closure of structural defects after thermal deformation processing, the purpose of the present invention is to provide A densification treatment method for spray-formed ultra-high-strength aluminum alloy materials to significantly improve the structure and properties of the material, and improve the quality consistency and reliability of the final product

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