Process method for improving comprehensive mechanical performance of aluminum alloy boards

Abstract

The invention discloses a process method for improving the comprehensive mechanical performance of aluminum alloy boards. The process method comprises the following steps of preparation, soaking, multi-axial forging, machining, surface milling, heating, deformation of different temperature sections, heat treatment, straightening, saw cutting and the like, specifically, the deformation of the different temperature sections comprises the following steps that heated forging stocks are subjected to high-temperature rolling and medium-temperature heat compression in a hot mill, the boards subjectedto heat compression are transferred to the hot mill to be subjected to medium-temperature rolling, precision cold rolling is conducted, and the deformation of the precision cold rolling is controlledto be about 10% of the total machining rate.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy forming and heat treatment, in particular to a process method for improving the comprehensive mechanical properties of 2A14 aluminum alloy plates. Background technique [0002] 2A14 aluminum alloy belongs to the Al-Cu-Mg series high-strength forging alloy. As an important structural material for aerospace, ships and transportation, it has the advantages of good process performance, good thermoplasticity and high working temperature. It is mainly used for heat-resistant and Welded structural parts, forgings with complex shapes, precision die forgings and plates, etc. In the prior art, the conventional process method of 2A14 aluminum alloy plate is to hot-roll the aluminum alloy ingot after homogenization annealing, shear, straighten and quench on-line after hot-rolling, and pre-stretch according to production needs after quenching Or cold rolling, and finally aging and finishing. The alloy ...

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Problems solved by technology

In the prior art, the conventional process method of 2A14 aluminum alloy plate is to hot-roll the aluminum alloy ingot after homogenization annealing, shear, straighten and quench on-line after hot-rolling, and pre-stretch according to production needs after quenching Or cold rolling, and finally aging and finishing. The alloy obtained by this process has uneven structure, coarse grains, and the problem of incomplete precipitation after heat treatment, resulting in unstable material properties and low mechanical properties.

With the rapid development of the national aerospace and transportation industries, higher requirements are put forward for the preparation of high-strength, high-toughness and stable performance aluminum alloy sheets. Due to the uneven structure, coarse grains and composition segregation of large-size aluminum alloy ingots and other phenomena, there are problems of uneven deformation and difficulty in rolling through the conventional rolling forming method.

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