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A kind of aluminum alloy pre-strengthening hot stamping forming method

A technology of hot stamping and aluminum alloy, which is applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of complicated procedures, unfavorable efficiency, and high equipment cost, so as to reduce energy consumption, improve production efficiency, and low equipment cost Effect

Active Publication Date: 2022-04-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process can achieve both strength and toughness, the process is complicated and has certain requirements for heating and cooling rates, so the equipment cost is high, and the final re-aging treatment takes 20-30 hours, which is not conducive to improving efficiency

Method used

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  • A kind of aluminum alloy pre-strengthening hot stamping forming method
  • A kind of aluminum alloy pre-strengthening hot stamping forming method
  • A kind of aluminum alloy pre-strengthening hot stamping forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Using 2024 aluminum alloy as a blank, an aluminum alloy pre-strengthening hot stamping forming method includes the following steps:

[0037] (1) Place the 2024 aluminum alloy billet in a resistance furnace and heat it to 487-499°C and keep it warm for 30 minutes to obtain a W-state aluminum alloy plate;

[0038] (2) Pre-strengthen the W-state aluminum alloy plate within 10 minutes, that is, heat it to 50°C and keep it warm for 24 hours to obtain a hot stamping blank;

[0039] (3) Transfer the blank to the hot stamping production line, heat it to 270°C, and keep it warm for 30 seconds;

[0040] (4) The heated billet is quickly transferred to a water-cooled mold within 7 seconds for hot stamping and pressure-holding and cooling in the mold to obtain the final product without subsequent aging heat treatment.

[0041] Cut tensile samples from the parts after stamping and perform uniaxial tensile test to test their mechanical properties after forming. Taking the average val...

Embodiment 2

[0043] Using 2024 aluminum alloy as a blank, an aluminum alloy pre-strengthening hot stamping forming method includes the following steps:

[0044] (1) Place the 2024 aluminum alloy billet in a resistance furnace and heat it to 487-499°C and keep it warm for 30 minutes to obtain a W-state aluminum alloy plate;

[0045] (2) Pre-strengthen the W-state aluminum alloy plate within 10 minutes, that is, heat it to 100°C and keep it warm for 1 hour to obtain a hot stamping blank;

[0046] (3) Transfer the blank to the hot stamping production line, heat it to 230°C, and keep it warm for 5 minutes;

[0047] (4) The heated billet is quickly transferred to a water-cooled mold within 7 seconds for hot stamping and pressure-holding and cooling in the mold to obtain the final product without subsequent aging heat treatment.

[0048] Cut tensile samples from the parts after stamping and perform unidirectional tensile test to test their mechanical properties after forming. Taking the average...

Embodiment 3

[0050] Using 2024 aluminum alloy as a blank, an aluminum alloy pre-strengthening hot stamping forming method includes the following steps:

[0051] (1) Place the 2024 aluminum alloy billet in a resistance furnace and heat it to 487-499°C and keep it warm for 30 minutes to obtain a W-state aluminum alloy plate;

[0052] (2) Pre-strengthen the W-state aluminum alloy plate within 10 minutes, that is, heat it to 75°C and keep it warm for 12 hours to obtain a hot stamping blank;

[0053] (3) Transfer the blank to the hot stamping production line, heat it to 250°C, and keep it warm for 3 minutes;

[0054] (4) The heated billet is quickly transferred to a water-cooled mold within 7 seconds for hot stamping and pressure-holding and cooling in the mold to obtain the final product without subsequent aging heat treatment.

[0055] Cut tensile samples from the parts after stamping and perform uniaxial tensile test to test their mechanical properties after forming. Taking the average valu...

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Abstract

The invention relates to an aluminum alloy pre-strengthening hot stamping forming method. The W-state aluminum alloy plate after solution quenching is subjected to pre-strengthening treatment in a lower temperature range to obtain hot stamping blanks supplied in batches. Transfer the pre-strengthened sheet material to the hot stamping production line for heating, heat it for 30 seconds to 5 minutes and then carry out the hot stamping process. After pre-strengthening treatment, the hot stamping sheet can form a larger and more stable GP zone structure than the T4 state, so in the subsequent hot stamping process, it is conducive to the transformation of the pre-precipitated structure into a metastable strengthening phase. In addition, the hot stamping process The work hardening effect produced in the process makes the performance of the parts after forming can exceed the T6 state or even approach the T8 state. The process method can effectively improve the production efficiency of hot stamping through the batch supply of pre-strengthened aluminum alloy blanks, and at the same time ensure the performance of the product.

Description

technical field [0001] The invention relates to the technical field of sheet metal forming processing, in particular to an aluminum alloy pre-strengthening hot stamping forming method. Background technique [0002] In recent years, aluminum alloys have played an increasingly important role in aerospace, automotive and other fields. At present, there are mainly two forming methods for aluminum alloy parts at home and abroad, namely cold forming and hot forming. Due to the poor formability of aluminum alloys, only medium-strength 5xxx and 6xxx aluminum alloys are usually used for cold forming, mostly in the O state and T4 state, and are mostly used for simple components. For high-strength aluminum alloys such as 7xxx series aluminum alloys, their disadvantages in formability are obvious, so hot forming is usually the main method. Nowadays, the hot forming of aluminum alloy has been developed rapidly, and has become an important forming processing method of aluminum alloy, es...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/02B21D37/16C22F1/04C22F1/057C22F1/05C22F1/053
CPCB21D22/022C22F1/04C22F1/057C22F1/05C22F1/053
Inventor 华林胡志力张文沛
Owner WUHAN UNIV OF TECH
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