Al-Mg-Si-Cu alloy material and application thereof on aluminum control arm of automobile

Abstract

The invention relates to an Al-Mg-Si-Cu alloy material and an application thereof on an aluminum control arm of an automobile. The alloy material comprises the chemical components of 0.95-1.5% of Si, 0.3% of Fe, 0.4-0.5% of Cu, 0.85-1.10% of Mn, 0.8-1.2% of Mg, 0.2% of Zn, 0.10% of Ti, 0.25-0.5% of Cr, and the balance of Al; and the alloy material is applied to the aluminum control arm of the automobile. The method comprises the steps of (1) proportioning the components and smelting according to the alloy material, so as to form melt; (2) refining the melt by nitrogen and a refining agent after transferring into a stewing furnace, wherein the refining temperature is 735-745 DEG C; and the time is 20 minutes; stewing for 30 minutes after refining, and degassing, deslagging and purifying the melt through the process, filtering by two filter plates between a casting mold and a fire hole when casting; filtering by 14 meshes of glass fiber cloth before casting, fully filtering oxide and slag inclusion in the melt; (3) homogenizing annealing and extruding technologies; and (4) carrying out forging and heating processing technology. By adopting the alloy material and the heat processing technology, the situation that the product meets the requirements of operational performance can be ensured.

Description

technical field [0001] The invention relates to an aluminum alloy material and its application on auto parts, in particular to an Al-Mg-Si-Cu alloy material and its application on an aluminum alloy control arm of an automobile. Background technique [0002] For the aluminum control arm, 6082 (Al-Mg-Si-Cu series) extruded rods are mostly used in the world for forging, and the extrusion effect of 6082 extruded rods disappears during the forging process, and the strength and plasticity decrease. The specific process of aluminum control arm usually includes: melting, casting, homogenization, extrusion forging, heat treatment and other process steps. [0003] Table 1: 6082 Chemical Composition Standards [0004] Element Si Fe Cu mn Mg Zn Ti Cr Al weight% 0.7—1.3 0.5 0.10 0.4—1.0 0.6—1.2 0.2 0.10 0.25 margin [0005] Generally, the properties of forgings made of 6082 bars are tensile...

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Problems solved by technology

[0006] The object of the present invention is to provide a kind of Al-Mg-Si-Cu alloy material and its application on the control arm of automobile aluminum alloy system, it mainly solves the above-mentioned existing 6082 extruded bar material and the performance of the forging can not satisfy the customer's technology Requirements, use 6082 material to control and adjust the composition, and use the bar made by reverse extrusion as the raw material. In particular, a new heat treatment process is provided to solve the problem of using the control arm in harsh environments, and to fill the aluminum control arm in my country. The performance of the boom cannot reach the level of foreign countries, and it exceeds the top level of foreign countries

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