High-strength aluminum alloy subjected to carbonitride complex treatment and preparation method thereof

A carbonitride and composite treatment technology, applied in the field of aluminum alloy materials and their high-quality treatment, to achieve the effect of improving strength and hardness and preventing coarsening

Inactive Publication Date: 2013-04-24
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to add metal carbonitride M x (C,N) y , so that it is partially dissolved in the melt, providing atomic alloy elements M, C, and N elements, resulting in a variety of atomic metamorphic elements, and at the same time, some carbonitrides still exist in the form of compounds

Method used

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  • High-strength aluminum alloy subjected to carbonitride complex treatment and preparation method thereof
  • High-strength aluminum alloy subjected to carbonitride complex treatment and preparation method thereof

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Experimental program
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Embodiment Construction

[0062] Step 1: Select the formula of each element and substance according to the table below, and calculate the weight of each substance required based on the total amount of the prepared alloy of 1000kg.

[0063]

[0064] Step 2: First add aluminum ingots or molten aluminum into the smelting furnace, heat it to melt it completely, add the alloy elements selected in step 1 according to the proportion of the formula, make it completely dissolved and melted, and heat it at 700-1000°C after refining Insulation; the melting process is completed in a closed environment;

[0065] Step 3: Use a mixed gas of nitrogen and argon (V / V 1:1), add a small amount of chlorine (volume ratio: 1%), degas and purify the melt, and make carbonitride powder (50 mesh) Add the gas into the alloy melt in a fluidized manner; stir at the same time so that the carbonitrides are evenly distributed in the alloy melt and fully react with the alloy melt; after adding the modifier, continue to feed the mixe...

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Abstract

The invention discloses a high-strength aluminum alloy subjected to carbonitride complex treatment and a preparation method thereof. The alloy comprises the following components in percentage by weight: 2.0-3.2 percent of Cu, less than or equal to 0.2 percent of Mn, 0.2-0.5 percent of Mg, less than or equal to 0.01 percent of Cr, less than or equal to 0.01 percent of Ni, less than or equal to 0.1 percent of Zn, less than or equal to 0.15 percent of Ti, less than or equal to 0.5 percent of Si, less than or equal to 0.5 percent of Fe, and the balance of Al and inevitable trace impurities, wherein the carbonitride MX(C,N)Y is 0.05-2.5 percent of total mass of the furnace burden. The aluminum alloy has the characteristics of high strength and good casting performance.

Description

technical field [0001] The invention relates to an aluminum alloy material and a high-quality treatment method thereof, in particular to a high-strength aluminum alloy treated with carbonitride compound and a preparation method thereof. Background technique [0002] Aluminum alloys for deep processing often need to be first cast into large ingots, such as flat ingots, round bars, etc., and then processed into various finished products by means of rolling, extrusion, forging, etc. These processes are basically related to heat treatment. Combined, if the final product can be used directly, it will also go through operations such as segmentation, surface processing, and passivation treatment. These processing methods require that the aluminum alloy material itself has good deep processing performance, including casting performance, pressure processing deformation performance, heat treatment strengthening performance, corrosion resistance performance, fatigue damage resistance p...

Claims

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Application Information

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IPC IPC(8): C22C21/16C22C1/02
Inventor 车云门三泉张中可
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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