A heat treatment process for aluminum alloy
An aluminum alloy and preheating technology, which is applied in the field of aluminum alloy thermal processing, can solve the problems of unqualified tensile properties, intergranular corrosion, high technical level requirements for workers, and high aluminum alloy manufacturing costs, and achieve good ductility and durability. Enhanced corrosion performance and reduced manufacturing costs
Active Publication Date: 2017-11-21
苏州市新鸿基精密部品有限公司
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Problems solved by technology
In many occasions where aluminum alloy is used, aluminum alloy is required to have good bending and elongation properties, so it is necessary to heat treat aluminum alloy, but the current heat treatment method has high temperature, long processing time, high energy consumption, and complicated operation. Afterwards, the tensile properties and intergranular corrosion often fail. The production cost of aluminum alloy is high, and the technical level of workers is high.
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0024] A heat treatment process for aluminum alloys, such as figure 1 shown, including the following steps:
[0025] ①The aluminum alloy workpiece is preheated for 3 hours in a heating furnace at 200-260 °C;
[0026] ②After the preheating treatment, rapidly cool the above-mentioned aluminum alloy workpiece at a rate of 60°C / sec-80°C / sec;
[0027] ③Solution treatment of the above-mentioned aluminum alloy workpiece at 500-515°C;
[0028] 4. After taking out the ab...
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The invention provides a heat treatment technology for an aluminum alloy. The technology comprises the steps that an aluminum alloy workpiece is preheated; then, the aluminum alloy workpiece is rapidly cooled at the rate of 60 DEG C / sec-80 DEGC / sec; the aluminum alloy workpiece is subjected to solid solution treatment at the temperature of 500 DEG C to 515 DEG C; then, the workpiece is taken out to be subjected to cold quenching treatment; the aluminum alloy workpiece subjected to water quenching is placed in a heating furnace and subjected to aging treatment for 5-8 h, and the temperature of the final aging ranges from 200 DEG C to 220 DEG C; and artificial aging is conducted for 48-60 h, and air cooling is conducted to the room temperature. Before aging treatment, pre-aging treatment needs to be conducted, and the pre-aging temperature ranges from 120 DEG C to 150 DEG C. According to the technical scheme, the heat treatment time is moderate, operation is simple and easy to implement, heat energy consumption is low, and the producing and manufacturing cost of the aluminum alloy is reduced. The corrosion resistance of the aluminum alloy is enhanced, the size stability of the obtained workpiece is good, and certain ductility and good mechanical performance are achieved.
Description
technical field [0001] The invention relates to the technical field of thermal processing of aluminum alloys, in particular to a heat treatment process of aluminum alloys. Background technique [0002] With the rapid development of aerospace technology, the requirements for material performance are getting higher and higher, and reducing the structural weight is one of the main methods to improve the performance of aerospace vehicles. Among them, lightweight often starts from improving the tensile strength, elastic modulus or crack growth resistance of the material. Aluminum alloy has a series of advantages such as low density, high specific strength, good formability and corrosion resistance, and low cost, and is widely used in aerospace and industrial fields. Heat treatment of aluminum alloy can improve the mechanical properties of aluminum alloy, enhance corrosion resistance, improve processing performance, and obtain dimensional stability. In many occasions where alumi...
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IPC IPC(8): C22F1/057C22C21/16
CPCC22C21/14C22C21/16C22F1/002C22F1/057
Inventor 李坚
Owner 苏州市新鸿基精密部品有限公司