A method for reducing air bubbles on the surface of aluminum alloy rods

A technology of surface air bubbles and aluminum alloy, which is applied in the field of reducing air bubbles on the surface of aluminum alloy rods and reducing air bubbles on the surface of aluminum alloy rods after extrusion through a porous die, which can solve the problems of high scrap rate, high cost of manpower and material resources, porous aluminum The problem of high proportion of air bubbles on the surface of the bar can reduce the surface air bubbles, improve the uneven deformation of the ingot, and promote the effect of strand deformation

Active Publication Date: 2021-05-11
CHINA ZHONGWANG
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Problems solved by technology

[0005] In view of this, the present invention provides a method for reducing air bubbles on the surface of aluminum alloy rods in order to solve the problems of high proportion of air bubbles on the surface of porous aluminum alloy rods prepared by the existing technology, resulting in high reject rate and high cost of manpower and material resources

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  • A method for reducing air bubbles on the surface of aluminum alloy rods
  • A method for reducing air bubbles on the surface of aluminum alloy rods

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Embodiment 1

[0037] A method for reducing air bubbles on the surface of aluminum alloy rods, comprising the following steps:

[0038] A. Ingredients: The raw materials for preparing aluminum alloy rods are prepared according to the weight percentage, and the weight percentage ratio of each element of the aluminum alloy raw material is as follows:

[0039] element Si Fe Cu mn Mg Zn Ti Impurities Al content 0.6 0.3 0.1 0.3 0.7 0.2 0.02 0.03 margin

[0040] B. Melting and casting: Add the prepared aluminum alloy raw materials into the smelting furnace to mix them evenly and then melt them into liquid aluminum alloys. The melting temperature of ingots and aluminum alloy raw materials is 730-750°C, the refining temperature is 720-740°C, and the casting temperature is 680-700°C. The frequency of electromagnetic stirring is not less than 2 times, the interval time is 15 to 25 minutes, and the time of each stirring is not less than 5 minutes. The pre...

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Abstract

The invention belongs to the technical field of aluminum alloy heat treatment, and relates to a method for reducing air bubbles on the surface of aluminum alloy rods. In the extrusion process, the homogenized aluminum alloy ingot is placed in an extrusion machine to extrude the pier, wherein the main scissors and The mold seat gap is 20μm-40μm, the upper part of the main scissors is provided with an L-shaped notch with an included angle of 90-135°, the difference between the diameter of the aluminum alloy ingot and the inner diameter of the extrusion cylinder is 6mm-8mm, the length of the aluminum alloy ingot and the The length ratio of the extrusion cylinder is 0.8, the extrusion ratio of the extrusion cylinder is 10 to 25, the temperature of the head and tail of the aluminum alloy ingot is 450±10°C, the heating temperature of the middle ingot is 500±10°C, and the number of extrusion pier thicknesses is 2 times, the first pier pressure is set to 40%×F 突破压力 , the rough pressure of the secondary pier is set to 65%×F 突破压力 , The extruder is a 18MN~75MN single-action forward extruder, which solves the problems of high proportion of air bubbles on the surface of porous aluminum alloy rods prepared by the existing process, resulting in high scrap rate and high cost of manpower and material resources.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy heat treatment, and relates to a method for reducing air bubbles on the surface of aluminum alloy rods, in particular to a method for reducing air bubbles on the surface of aluminum alloy rods extruded through a porous die. Background technique [0002] Aluminum alloy materials have small specific gravity, high specific strength, good corrosion resistance, good formability, mechanical properties, physical properties and process properties, and are widely used in automobile manufacturing, transportation and aerospace fields. Solution treatment in the preparation process of aluminum alloy products is a very important heat treatment process. According to the requirements of use, most aluminum alloy extrusion castings need to be solution treated, that is, quenched. Appropriate solution treatment can lay a good foundation for subsequent aging treatment, and promote the formation of fine and disp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/02C22F1/05B21J1/02
CPCB21J1/02C22C1/026C22C21/08C22F1/05
Inventor 何强董军贺远继才韩启强赵明然王志博关明政
Owner CHINA ZHONGWANG
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