Heat forming method for aluminum alloy sheet metal part after solid solution and water quenching
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A solid solution water quenching, aluminum alloy technology, applied in forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of large changes in shape and size, slow cooling and quenching speed, and high requirements for forming equipment, so as to avoid changes in the shape and size of parts. , to ensure the shape and size accuracy, the effect of high dimensional accuracy
Inactive Publication Date: 2013-03-20
HARBIN INST OF TECH
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[0005] The present invention aims to solve the problem that the shape and size of the existing heat-treatable and strengthened aluminum alloys change greatly when they are first formed and then heat-treated. It is difficult to control the temperature of aluminum alloy slabs, the cooling and quenching speed in the mold after forming is slow, which is not conducive to obtaining supersaturated solid solution, and requires high technical problems for forming equipment. thermoforming method
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specific Embodiment approach 1
[0022] Specific Embodiment 1: In this embodiment, a method for thermoforming an aluminum alloy sheet metal part after solid solution water quenching is carried out according to the following steps:
[0023] 1. Put the aluminum alloy slab in the heating furnace, and heat it for 30-180 minutes at a temperature of 450-575°C for solid solution. After the solid solution is completed, take it out for water quenching;
[0024] 2. Heat the mold to a temperature of 150~400°C;
[0025] 3. Put the aluminum alloy slab processed in step 1 into the mold processed in step 2 and heat it to a temperature of 150~400°C, then close the molds and press to complete the forming of aluminum alloy sheet metal parts;
[0026] 4. Remove the formed aluminum alloy sheet metal parts, cool to room temperature, and then perform aging treatment at a temperature of 120-250 °C to obtain the final aluminum alloy sheet metal parts.
specific Embodiment approach 2
[0027] Embodiment 2: This embodiment differs from Embodiment 1 in that in Step 2, the mold is heated by a heating rod built into the mold, and other steps and parameters are the same as Embodiment 1.
specific Embodiment approach 3
[0028] Specific embodiment three: this embodiment is the same as specific embodiment one or two: before step three, the aluminum alloy slab processed in step one is preheated to 150~400°C, other steps and parameters are the same as the specific embodiment One or two the same.
[0029] In this embodiment, the aluminum alloy slab is preheated, which shortens the heating time of the aluminum alloy slab in the mold and shortens the forming cycle.
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Abstract
The invention discloses a heat forming method for an aluminum alloy sheet metal part after solid solution and water quenching, relates to a heat forming method for a heat-treatable strengthening aluminum alloy sheet metal part and aims at solving the technical problems that existing heat-treatable strengthening aluminum alloy is large in shape and size change in the process of heat treatment after the heat-treatable strengthening aluminum alloy is formed first, heat melting forming and cold mold quenching technique requires transfer locating and forming to be fast, in an aluminum alloy sheet metal part cold-hot compound mold forming method, control on temperature of an aluminum alloy slab is difficult, in-mold cooling and quenching speed after forming is slow and not beneficial for obtaining a supersaturated solid solution, requirements for forming equipment are high, and the like. The forming method includes the flowing steps: carrying out the solid solution and the water quenching to the aluminum alloy slab, then, placing the aluminum alloy slab in a hot-state mold to carry out secondary heating, and carrying out aging treatment after pressing forming. According to the heat forming method for the aluminum alloy sheet metal part after the solid solution and the water quenching, the requirements for the forming equipment are not high, precision of shape and size of the aluminum alloy sheet metal part is high, strength is greatly improved, and the heat forming method for the aluminum alloy sheet metal part after the solid solution and the water quenching is suitable for the heat-treatable strengthening aluminum alloy such as 2000 series aluminum alloy, 6000 series aluminum alloy and 7000 series aluminum alloy.
Description
technical field [0001] The invention relates to a thermoforming method for heat-treatable and strengthened aluminum alloy sheet metal parts Background technique [0002] Heat-treatable aluminum alloys such as 2000-series, 6000-series and 7000-series aluminum alloys have significantly improved strength after heat treatment strengthening (solution treatment + aging). In conventional forming methods, such aluminum alloy parts are usually formed in an annealed state, and then the formed parts are heat treated to improve their strength and meet the final use requirements. However, during solution treatment, it is necessary to heat the formed part to a certain temperature (450~550°C) and keep it for a certain period of time, then perform rapid cooling and quenching to obtain a supersaturated solid solution and prepare for the subsequent aging. During the solid solution heating and quenching process, due to uneven thermal expansion and contraction, thermal stress, and internal str...
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