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Preparation method of Al-Mg-Si alloy profile for high speed motor car

A technology for alloy profiles and high-speed motor vehicles, which is applied in the field of aluminum alloy preparation, can solve problems such as expensive, complicated, and unobtainable, and achieve the effect of improving mechanical properties

Inactive Publication Date: 2017-09-15
广西南南铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Rail transit trains run fast and have relatively high performance requirements for materials. The mechanical performance requirements are all in accordance with the T6 state requirements. However, because the offline quenching equipment for extruded profiles is relatively complicated and expensive, few aluminum profile companies currently equip them. Extruded profile offline quenching equipment, therefore, the current industrial production methods generally use the T5 state instead of the T6 state. Although the mechanical properties of the T5 state can generally meet the minimum requirements of the T6 state, it is 20-30MPa lower than the T6 state on average. The reduction of will lead to a reduction in the safety of the train structure
[0003] At present, industrial production generally adopts single-stage aging process, that is, the production process route is generally: extrusion-on-line quenching-single-stage high-temperature artificial aging, which cannot effectively control the shape, size and shape of the precipitated phase during the aging process of the Al-Mg-Si alloy. Therefore, when the solid solution is not sufficient in the T5 state, high strength cannot be obtained, thus failing to meet the use requirements of high-speed motor vehicles

Method used

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  • Preparation method of Al-Mg-Si alloy profile for high speed motor car
  • Preparation method of Al-Mg-Si alloy profile for high speed motor car
  • Preparation method of Al-Mg-Si alloy profile for high speed motor car

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Embodiment 1

[0028] Please refer to figure 1 , the present embodiment provides a method for preparing Al-Mg-Si alloy profiles for high-speed motor vehicles, including the following steps:

[0029] (1) Extrusion (S1): Use a 7500MN single-action short-stroke extrusion machine manufactured by Shanxi Taiyuan Heavy Machinery Group Co., Ltd., with an extrusion cylinder diameter of 460mm; the cast aluminum alloy ingot is an Al-Mg-Si alloy ingot, The composition and weight percentage of the Al-Mg-Si alloy ingot are: Si: 0.6%, Mg: 1%, Cu: 0.3%, Fe: 0.6%, Cr: 0.2%, Mn: 0.1%, Zn: 0.2%, Ti: 0.1%, V: 0.05%, Sc: 0.15%, Ag: 0.1%, the rest is Al and unavoidable impurities; the diameter of the ingot wagon is 448mm, and the length of the ingot is 1000mm; the Al-Mg-Si The alloy ingot is heated in different zones, the head temperature is 510°C, the middle temperature is 500°C, and the tail temperature is 490°C. The mold is heated to 500°C. After the temperature of the extrusion cylinder is controlled at 450±...

Embodiment 2

[0035] This embodiment provides a method for preparing Al-Mg-Si alloy profiles for high-speed motor vehicles, including the following steps:

[0036](1) Extrusion: use a 7500MN single-action short-stroke extrusion machine manufactured by Shanxi Taiyuan Heavy Machinery Group Co., Ltd., with an extrusion cylinder diameter of 460mm; the cast aluminum alloy ingot is an Al-Mg-Si alloy ingot, and the Al -The composition and weight percentage of Mg-Si alloy ingot are: Si: 0.4%, Mg: 0.8%, Cu: 0.15%, Fe: 0.5%, Cr: 0.1%, Mn: 0.05%, Zn: 01%, Ti: 0.1%, V: 0.05%, Sc: 0.15%, Ag: 0.1%, the rest is Al and unavoidable impurities; the diameter of the ingot wagon is 448mm, and the length of the ingot is 1200mm; the Al-Mg-Si alloy is cast ingot Partition heating, head temperature 520°C, middle temperature 500°C, tail temperature 480°C, mold heating to 490°C, after the temperature of the extrusion cylinder is controlled at 450±10°C, the upper mold of the Al-Mg-Si alloy ingot is processed Extrusio...

Embodiment 3

[0042] This embodiment provides a method for preparing Al-Mg-Si alloy profiles for high-speed motor vehicles, including the following steps:

[0043] (1) Extrusion: use a 7500MN single-action short-stroke extrusion machine manufactured by Shanxi Taiyuan Heavy Machinery Group Co., Ltd., with an extrusion cylinder diameter of 460mm; the cast aluminum alloy ingot is an Al-Mg-Si alloy ingot, and the Al -The composition and weight percentage of Mg-Si alloy ingot are: Si: 0.8%, Mg: 1.2%, Cu: 0.4%, Fe: 0.7%, Cr: 0.3%, Mn: 0.15%, Zn: 0.25%, Ti: 0.1%, V: 0.05%, Sc: 0.15%, Ag: 0.2%, and the rest are Al and unavoidable impurities; the Al-Mg-Si alloy ingot is heated in different areas, the head temperature is 510°C, and the middle temperature is 500°C ℃, the tail temperature is 490℃, the mold is heated to 500℃, after the temperature of the extrusion cylinder is controlled at 450±10℃, the Al-Mg-Si alloy ingot upper mold is extruded, and the extrusion speed is controlled at 5m / min; Extrude...

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Abstract

The invention discloses a preparation method of Al-Mg-Si alloy profile for a high speed motor car, and relates to the technical field of aluminum alloy preparation. A single-stage aging technology commonly adopted in present industrial production is adjusted from the original extrusion-online quenching-single-stage high temperature artificial aging to extrusion-online quenching-single-stage low temperature artificial aging-cooling and placing-double-stage high temperature artificial aging, matching with specific alloy components, through third-stage aging treatment, a second phase is more tiny and uniform after growing up, and accordingly the mechanical property of a T5 state of alloy is improved, the strength of the alloy reaches to or slightly higher than a common T6 state, and therefore the using requirement of the high speed motor car is met.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy preparation, in particular to a method for preparing Al-Mg-Si alloy profiles for high-speed trains. Background technique [0002] Al-Mg-Si alloy profiles have moderate strength, are easy to bend, and have excellent welding performance, and are widely used in the field of rail transit. Rail transit trains run fast and have relatively high performance requirements for materials. The mechanical performance requirements are all in accordance with the T6 state requirements. However, because the offline quenching equipment for extruded profiles is relatively complicated and expensive, few aluminum profile companies currently equip them. Extruded profile offline quenching equipment, therefore, the current industrial production methods generally use the T5 state instead of the T6 state. Although the mechanical properties of the T5 state can generally meet the minimum requirements of the T6 state, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/05C22F1/047
CPCC22F1/05C22F1/047
Inventor 李剑莫宇飞宋丰轩谢尚昇向晶周伟覃珊赵茂密
Owner 广西南南铝加工有限公司
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