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Extrusion casting method for wrought aluminum alloy lampshade

A technology of deformed aluminum alloy and squeeze casting, applied in the field of lampshade preparation, can solve the problems of difficult mechanical properties of die castings, slow alloy solidification, easy formation of cracks, etc., achieve high tensile strength, improve blank accuracy, and dense and uniform organization Effect

Active Publication Date: 2015-12-30
东台城东科技创业园管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the traditional low-pressure casting is adopted, the solidification speed of the alloy is slow, the crystal grains are coarse, and shrinkage cavity and loose defects often appear in parts with large wall thickness; while defects such as cracks and "shrinkage" are easy to form in the traditional die-casting process, and die-casting parts are difficult to heat treat to improve its mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A squeeze casting method of deformed aluminum alloy lampshade includes the following steps:

[0020] S1: Prepared aluminum alloy precursor, including the following components by mass percentage, Si: 0.8%, Mg: 0.8%, Mn: 0.1%, Fe <0.3%, Cu <0.3%, Zn <0.3%, the content is less than 0.05% of at least one trace element among Ti, B, Re, Zr, the balance is Al;

[0021] S2: Add the aluminum alloy precursor described in step S1 to the melting furnace to increase the temperature to 690-710°C, and obtain the molten aluminum after being completely melted; select nitrogen or mixed inert gas, and pass it into the molten aluminum for refining through a rotary injection device, and set Gas flow rate 3m 3 / h, the speed of the graphite rod is 200r / min, the refining time is 10min, and the slag is purified;

[0022] S3: Then adjust the melting temperature to 710-730℃, add 0.1% AlSr modifier by mass percentage of molten aluminum to react for 10-30min; adjust the melting temperature again to 700-7...

Embodiment 2

[0027] A squeeze casting method of deformed aluminum alloy lampshade includes the following steps:

[0028] S1: Prepared aluminum alloy precursor, including the following components by mass percentage, Si: 1.4%, Mg: 1.4%, Mn: 0.5%, Fe <0.3%, Cu <0.3%, Zn <0.3%, the content is less than 0.05% of at least one trace element among Ti, B, Re, Zr, the balance is Al;

[0029] S2: Add the aluminum alloy precursor described in step S1 to the melting furnace to increase the temperature to 690-710°C, and obtain the molten aluminum after being completely melted; select nitrogen or mixed inert gas, and pass it into the molten aluminum for refining through a rotary injection device, and set Gas flow 4m 3 / h, the speed of the graphite rod is 250r / min, the refining time is 15min, and the slag is purified;

[0030] S3: Then adjust the smelting temperature to 710-730℃, add 0.2% AlSr modifier by mass percentage of molten aluminum to react for 10-30min; adjust the smelting temperature again to 700-720℃...

Embodiment 3

[0035] A squeeze casting method of deformed aluminum alloy lampshade includes the following steps:

[0036] S1: Prepared aluminum alloy precursor, containing the following components in mass percentages, Si: 2%, Mg: 2%, Mn: 0.8%, Fe <0.3%, Cu <0.3%, Zn <0.3%, and the content is less than 0.05% of at least one trace element among Ti, B, Re, Zr, the balance is Al;

[0037] S2: Add the aluminum alloy precursor described in step S1 to the melting furnace to increase the temperature to 690-710°C, and obtain the molten aluminum after being completely melted; select nitrogen or mixed inert gas, and pass it into the molten aluminum for refining through a rotary injection device, and set Gas flow rate 5m 3 / h, the speed of the graphite rod is 300r / min, the refining time is 20min, and the slag is purified;

[0038] S3: Then adjust the smelting temperature to 710-730°C, add 0.3% AlSr modifier by mass percentage of the molten aluminum to react for 10-30 minutes; adjust the smelting temperature ...

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Abstract

The invention provides an extrusion casting method for a wrought aluminum alloy lampshade. The extrusion casting method comprises the following steps of S1, preparing an aluminum alloy precursor; S2, adding the aluminum alloy precursor into a smelting furnace, and heating to 690-710 DEG C until the aluminum alloy precursor is completely molten to obtain molten aluminum, introducing nitrogen or mixed inert gas to the molten aluminum by rotary blowing equipment for refining, purifying and skimming; S3, regulating the smelting temperature to 710-730 DEG C, and adding an AlSr alterant to react for 10-30 minutes; and then, regulating the smelting temperature to 700-720 DEG C again, adding an AlTiB grain refiner, uniformly stirring for 5-10 minutes, and next, adding a hexachloroethane refining agent to react, and skimming after ending to obtain refined molten aluminum; S4, pouring the refined molten aluminum into a die cavity, and carrying out extrusion casting to obtain a cast-state casting; and S5, carrying out thermal treatment on the cast-state casting to obtain the wrought aluminum alloy lampshade. The wrought aluminum alloy lampshade prepared by using the extrusion casting method is compact in tissue and high in corrosion resistance, tensile strength and elongation percentage.

Description

Technical field [0001] The invention belongs to the field of lampshade preparation, and particularly relates to a squeeze casting method of deformed aluminum alloy lampshade. Background technique [0002] The airport runway light cover has to withstand the impact of aircraft takeoff and landing, and the erosion and penetration of rain in cloudy and rainy days. Therefore, the light cover must have excellent comprehensive mechanical properties to ensure the normal operation of the airport runway at night and in special weather. If the traditional low-pressure casting is used, the alloy solidification speed is slow, the crystal grains are coarse, and shrinkage holes and loose defects often appear in the thick wall parts; while the traditional die casting process is prone to cracks, "shrinkage" and other defects, and the die casting is difficult to heat treatment To improve its mechanical properties. Squeeze casting as a near-net forming technology has been widely used in the fields...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C21/02C22C21/08C22C1/02C22F1/04C22F1/043C22F1/047C22F1/05B22D18/02
Inventor 姜银方姜文帆孟祥豹许善新
Owner 东台城东科技创业园管理有限公司
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