Automobile sill beam aluminum alloy and preparation method thereof

A door sill beam and aluminum alloy technology, which is applied in the field of automobile door sill beam aluminum alloy and its preparation, can solve the problems that cannot be satisfied at the same time

Active Publication Date: 2020-04-28
上海泽升汽车科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Automobile sill beam aluminum alloy and preparation method thereof
  • Automobile sill beam aluminum alloy and preparation method thereof
  • Automobile sill beam aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

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 automobile sill beam aluminum alloy and a preparation method of the automobile sill beam aluminum alloy. The method comprises the following steps of (1) in the process of smelting molten aluminum, adding an aluminum-copper alloy, an aluminum-silicon alloy, magnesium ingot and a manganese agent, wherein the mass percentage of added elements in a final aluminum rod is asfollows: 0.90-1.10wt% of magnesium, 0.90-1.10wt% of silicon, 0.50-0.80wt% of manganese, and 0.20-0.40wt% of copper; (2) filtering an aluminum liquid; (3) performing continuous casting through a casting system to obtain an aluminum rod; (4) transferring the aluminum rod into a homogenizing furnace for homogenization under the temperature of 550-570 DEG C, performing heat preservation for 8-12 h, and carrying out air mist cooling; and (5) sawing the aluminum rod to obtain short rods for extrusion. By adjusting the magnesium-silicon ratio, the content of Cu is increased, the product performance is further improved, and meanwhile, it is ensured that the decay rate can be low during later-period baking, and the performance of the prepared aluminum alloy in different states can meet requirements.

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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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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