A kind of automobile door sill beam aluminum alloy and preparation method thereof

A technology of threshold beam and aluminum alloy is applied in the field of automobile threshold beam aluminum alloy and its preparation.

Active Publication Date: 2021-07-16
上海泽升汽车科技有限公司
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Problems solved by technology

[0008] Aiming at the technical problem that the existing 6-series aluminum alloys cannot simultaneously meet the higher normal performance requirements and the performance requirements after baking in different cycles, the purpose of the present invention is to provide an aluminum alloy for an automobile door sill beam and a preparation method thereof. The aluminum alloy of the automobile door sill beam is a 6-series medium-high-strength thermal stability material, which not only meets the higher normal performance requirements, but also meets the performance requirements after different cycles of baking

Method used

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  • A kind of automobile door sill beam aluminum alloy and preparation method thereof
  • A kind of automobile door sill beam aluminum alloy and preparation method thereof
  • A kind of automobile door sill beam aluminum alloy and preparation method thereof

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Embodiment 1

[0026] Example 1 Preparation of aluminum alloy for automobile door sill beam and its performance verification

[0027] Implementing equipment: 25T aluminum smelting furnace and its casting system, 40T homogenizing furnace, aluminum rod sawing machine, aluminum extrusion machine-2200T, aging electric furnace, milling machine, 20T universal testing machine.

[0028] Preparation steps:

[0029] (1) Smelting aluminum liquid, adding aluminum-copper alloy with copper content of 50wt%, aluminum-silicon alloy with silicon content of 20wt%, magnesium ingot of 99.9wt%, manganese agent with manganese content of 75wt%, during the smelting process, the temperature of aluminum liquid is 740 -760°C; in the final aluminum rod, the alloy content in mass percentage meets: magnesium 0.90-1.10wt%, silicon 0.90-1.10%, manganese 0.50-0.80%, copper 0.20-0.40%;

[0030] (2) The aluminum liquid adopts two-stage filtration, and the mesh numbers of the filter plates are 40 mesh and 60 mesh respectively...

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Abstract

The invention relates to an aluminum alloy for an automobile door sill beam and a preparation method thereof. The method comprises the steps of: (1) adding an aluminum-copper alloy, an aluminum-silicon alloy, magnesium ingots and a manganese agent in the process of smelting molten aluminum; the final aluminum The mass percentage of the added elements in the rod meets: magnesium 0.90-1.10wt%, silicon 0.90-1.10%, manganese 0.50-0.80%, copper 0.20-0.40%; (2) filtering molten aluminum; (3) continuous casting through the casting system , casting aluminum rods; (4) Transfer the aluminum rods to a homogenizing furnace for homogenization, the conditions are 550-570 ° C, 8-12H heat preservation, wind and mist cooling; (5) sawing the aluminum rods to obtain extruded The short stick used. The present invention increases the content of Cu by adjusting the magnesium-silicon ratio, while further improving product performance, and at the same time ensures that the attenuation rate can be lower during post-baking, and the properties of the prepared aluminum alloy can meet the requirements in different states.

Description

technical field [0001] The invention belongs to the field of alloy materials, and in particular relates to an aluminum alloy for an automobile threshold beam and a preparation method thereof. Background technique [0002] With the promotion of aluminum alloys in the automotive industry, more and more places use aluminum alloys to replace the original steel, which further increases the requirements for the mechanical properties of aluminum alloys. [0003] At present, the performance requirements of automobile threshold beams in normal aging state and after thermal stability treatment are as follows: [0004] 1. Performance requirements under normal aging state (hereinafter referred to as normal state): compressive strength ≥ 310Mpa, yield strength = 290-320Mpa, elongation ≥ 10%; [0005] 2. Under normal conditions, the product undergoes short-term baking treatment for thermal stability (hereinafter referred to as short cycle), and its performance also needs to meet the norm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
CPCC22C1/026C22C1/03C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
Inventor 罗世兵李文通
Owner 上海泽升汽车科技有限公司
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