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Squeeze casting method for deformed aluminum alloy lampshade

A deformed aluminum alloy and extrusion casting technology, which is applied in the field of lampshade preparation, can solve the problems of difficult mechanical properties of die-casting parts, slow alloy solidification speed, and easy formation of cracks, etc., to achieve high tensile strength, improve blank precision, and dense and uniform structure Effect

Active Publication Date: 2017-09-05
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 for a deformed aluminum alloy lampshade, comprising the steps of:

[0020] S1: Prepare the aluminum alloy precursor, including the following components in 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, and the balance is Al;

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

[0022] S3: Then adjust the smelting temperature to 710-730°C, add 0.1% AlSr modifying agent accounting for the mass percentage of the molten aluminum to react for 10-30min; adjust the melting tempe...

Embodiment 2

[0027] A squeeze casting method for a deformed aluminum alloy lampshade, comprising the steps of:

[0028] S1: Prepare the aluminum alloy precursor, including the following components in 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, and the balance is Al;

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

[0030] S3: Then adjust the melting temperature to 710-730°C, add 0.2% of the mass percentage of the aluminum liquid AlSr modifier to react for 10-30min; adjust the melting temperature again to 700-...

Embodiment 3

[0035] A squeeze casting method for a deformed aluminum alloy lampshade, comprising the steps of:

[0036] S1: Prepare the aluminum alloy precursor, including the following components in mass percentage, Si: 2%, Mg: 2%, Mn: 0.8%, 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, and the balance is Al;

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

[0038] S3: Then adjust the smelting temperature to 710-730°C, add 0.3% of the mass percentage of the molten aluminum AlSr modifier for 10-30min; adjust the melting temperature again to 700-720°C, add 0...

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Abstract

The invention provides a extrusion casting method for a deformed aluminum alloy lampshade, comprising the following steps: S1 preparing an aluminum alloy precursor; S2: adding the aluminum alloy precursor to a smelting furnace to raise the temperature to 690-710°C, and obtain Aluminum liquid: choose nitrogen or mixed inert gas, pass it into aluminum liquid through rotary blowing equipment for refining, purify and remove slag; S3: then adjust the melting temperature to 710-730°C, add AlSr modifier to react for 10-30min; adjust the melting again The temperature is 700-720°C, add AlTiB grain refiner and stir evenly for 5-10 minutes, then add hexachloroethane refining agent to react, after the end, remove the slag to obtain the refined aluminum liquid; S4: pour the refined aluminum liquid into the mold cavity The as-cast casting is obtained after squeeze casting; S5: the deformed aluminum alloy lampshade can be obtained after heat treatment of the as-cast casting. The deformed aluminum alloy lampshade prepared by the invention has compact structure, strong corrosion resistance, high tensile strength and high elongation.

Description

technical field [0001] The invention belongs to the field of lampshade preparation, in particular to a squeeze casting method for a 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 rainwater in 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 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. Squeeze casting, as a near-net shape technology, has been wide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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