A method for strengthening aluminum alloys by using electromagnetic field aging
A technology of aging strengthening and aluminum alloy, which is applied in the field of electromagnetic field heat treatment of non-ferrous metal materials, can solve the problems that affect the implementation of industrialization and the difficulty of obtaining a stable and strong magnetic field, and achieve shortening of aging precipitation time, obvious improvement of structure and performance, and easy access Effect
Active Publication Date: 2017-03-01
CENT SOUTH UNIV
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[0010] The purpose of the present invention is to provide a method for strengthening aluminum alloys by using electromagnetic field aging to solve the technical problem that it is difficult to obtain a stable and strong magnetic field, thereby affecting the implementation and promotion of industrialization
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[0040] The 2219 aluminum alloy cold-rolled sheet with a thickness of 4mm was made into two groups of tensile samples according to HB5143-96. A group of samples were kept in a solid solution furnace at 500-545°C for 45 minutes, quickly quenched after taking out the samples, and then placed in an aging furnace at 175°C for 3 hours. The first two steps of another group of samples are the same, but an alternating magnetic field is applied in the aging furnace, and the frequency and intensity of the magnetic field are 40-60Hz and 40-100mT, respectively. The direction of the magnetic field is as figure 1 As shown, the aluminum alloy cold-rolled sheet is placed transversely in the magnetic force field so that it cuts the magnetic force lines.
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Abstract
The invention provides an aging strengthening method for aluminum alloy by utilizing an electromagnetic field. The aging strengthening method comprises the following steps: putting the aluminum alloy in a solid solution furnace for solid solution treatment, and taking out after heat insulation; putting the aluminum alloy after the solid solution treatment in a water channel filled with a water solution for quenching; warming an aging oven to an aging temperature, putting the aluminum alloy after quenching in the aging oven, meanwhile applying an alternating magnetic field, carrying out the aging treatment of the electromagnetic field on the aluminum alloy until the aging time is finished, wherein the strength of the alternating magnetic field is 0.04-0.1 T, the aging temperature is 165-190 DEG C, and the aging time is 3-24 h. The alternating magnetic field with the strength of about 0.04-0.1 T is additionally arranged at the aging period of the aluminum alloy, so that the aging precipitation time is shortened, the forms and amount of aging precipitated phases are influenced, and the mechanical properties of materials after thermal treatment is improved to a certain extent; moreover, the aging strengthening method is simple and easy to operate, and is convenient for industrial production implementation.
Description
technical field [0001] The invention relates to the technical field of electromagnetic field heat treatment of nonferrous metal materials, in particular to a method for strengthening aluminum alloys by using electromagnetic field aging. Background technique [0002] In actual production, the age hardening phenomenon is widely used to improve the strength of 2-series aluminum-copper alloys. According to the properties of the alloy and the requirements of use, different conventional aging processes can be used, mainly including single-stage aging, graded aging, deformation aging and regressive re-aging treatment. In recent years, as scholars at home and abroad have applied electromagnetic field methods to the field of materials and achieved certain results, it has gradually been recognized as a new method to improve the structure and properties of materials. The research on the electromagnetic solid-state phase transition process of metallic materials mainly includes various ...
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IPC IPC(8): C22F3/00C22F1/04
Inventor 刘玉振湛利华马强强赵啸林黄明辉
Owner CENT SOUTH UNIV
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