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Aluminum alloy pre-strengthening hot stamping forming method

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

Active Publication Date: 2021-01-26
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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  • Aluminum alloy pre-strengthening hot stamping forming method
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  • 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 method comprises the following steps that a W-state aluminum alloy plate after solution quenching is pre-strengthened in a lower temperature range to obtain hot stamping blanks supplied in batches; and the pre-strengthened plate is transferred to a hot stamping production line for heating, and after heatpreservation is carried out for 30 seconds to 5 minutes, a hot stamping process is carried out. After the hot stamping plate is pre-strengthened, a GP zone structure can be formed and is larger in size and more stable than a T4 state, so that the transformation of a pre-precipitated structure to a metastable strengthening phase is facilitated in the subsequent hot stamping process, and in addition, the performance of a formed part exceeds a T6 state and even approaches a T8 state through a processing hardening effect generated in the hot stamping process. According to the process method, the pre-strengthened aluminum alloy blanks are supplied in batches, so that the hot stamping production efficiency is effectively improved, and the use performance of the product is guaranteed.

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 Applications(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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