Al-Si-Mg-Ti-Sr-Fe alloy material and preparation process thereof

An al-si-mg-ti-sr-fe, alloy material technology, applied in the field of Al-Si-Mg-Ti-Sr-Fe alloy material and its preparation, can solve the problem of mixed inclusions, shrinkage holes, and influence on the hub Mechanical properties, etc.

Inactive Publication Date: 2016-03-30
黄晓艺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these studies are carried out in laboratories. In actual production, due to differences in cooling conditions, worker operations, mold design, raw materials, etc., the products produced are often mixed with various defects such as inclusions and shrinkage cavities. These defects seriously affect The mechanical properties of the hub
However, at present, there are relatively few studies on the occurrence and prevention of defects in the production process of aluminum alloy wheels, and the research hotspots are still focused on the refinement and deterioration of materials, the innovation of wheel hub preparation processes, etc.

Method used

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  • Al-Si-Mg-Ti-Sr-Fe alloy material and preparation process thereof
  • Al-Si-Mg-Ti-Sr-Fe alloy material and preparation process thereof
  • Al-Si-Mg-Ti-Sr-Fe alloy material and preparation process thereof

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Embodiment Construction

[0012] Using A356 aluminum ingots, adopting the method of low-pressure casting, adding appropriate amount of Al-Ti-B refiner and Al-10Sr modifier during the alloy melting process, the chemical composition (mass percentage) of the final fusion alloy is: 6.97% Si, 0.258%Mg, 0.128%Ti, 0.009%Sr, 0.131Fe, the total amount of remaining impurity elements <0.05%, and the balance Al. The experiment takes a Mercedes-Benz wheel hub as the research object, and adopts different cooling processes for the wheel hub to analyze the influence of different cooling methods on the defect distribution and mechanical properties of the wheel hub. The cooling method used in cooling process A is air cooling at the inner and outer rims, rims, and spokes, and water cooling at the center of the wheel to achieve sequential solidification; the cooling method used in cooling process B is all water cooling to achieve simultaneous solidification. Afterwards, the hub is subjected to solution and aging heat trea...

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Abstract

The invention discloses an Al-Si-Mg-Ti-Sr-Fe alloy material. The Al-Si-Mg-Ti-Sr-Fe alloy material is characterized by comprising, by mass, 6.97% of Si, 0.258% of Mg, 0.128% of Ti, 0.009% of Sr, 0.131% of Fe, 0-0.05% of remaining impurity elements, and the balance Al. A preparation process of the Al-Si-Mg-Ti-Sr-Fe alloy material comprises the steps that A356 aluminum ingots are used; by the adoption of a low-pressure casting method, an appropriate amount of Al-Ti-B refiner and Al-10Sr alterant are added in the alloy smelting process, and finally an alloy hub is manufactured through smelting; and afterward, solution treatment is conducted for 315-350 min at the temperature of 550 DEG C, hardening is conducted for 3 min at the temperature of 80 DEG C, and aging treatment is conducted for 180-200 min at the temperature of 135-155 DEG C.

Description

technical field [0001] The invention relates to an Al-Si-Mg-Ti-Sr-Fe alloy material and a preparation process thereof. Background technique [0002] In recent years, aluminum alloy wheels have been widely used in the automobile industry, and have won more and more favor for their elegant appearance, safety and comfort. Compared with steel wheels, aluminum alloy wheels perform better in absorbing vibration and rebounding force, which improves driving comfort. Generally, aluminum alloy wheels are about 2kg lighter than steel wheels on average, which reduces the rotational inertia of the four wheels, improves the acceleration of the car, and relatively reduces the need for braking energy. When the speed is 60km / h, it can save fuel by 5%~7 %, effectively reducing fuel consumption. In addition, the heat dissipation coefficient of aluminum alloy wheels is two to three times that of ordinary steel wheels. Coupled with the structural characteristics of aluminum alloy wheels, it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02C22F1/043B22D18/04
Inventor 黄晓艺
Owner 黄晓艺
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