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Method for alloying magnesium element on surface layer of aluminum alloy casting

A technology of aluminum alloy castings and aluminum alloys, which is applied in the field of aluminum alloy casting, can solve the problems of inability to balance casting process performance and corrosion resistance, and achieve the effects of excellent casting process performance, simple implementation process, and low cost

Pending Publication Date: 2021-08-03
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for alloying magnesium on the surface of aluminum alloy castings, which is used to solve the technical problem that the existing aluminum-magnesium series casting aluminum alloy casting methods cannot take into account the casting process performance and corrosion resistance performance

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] The casting material is ZL114, the shape of the casting is a revolving body, its height is 238mm, the maximum profile diameter of the casting is 331mm, and 1 / 4 of the surface of the casting is in contact with the air during use. In order to prevent the rapid corrosion of the casting body after the protective coating is damaged, the The surface layer needs to be alloyed with magnesium to improve corrosion resistance. The casting is prepared as follows:

[0023] (1), prepare required Al-20wt.%Mg ingot by conventional method;

[0024] (2), the obtained ingot is kept at 500° C. for 20 hours in an atmosphere;

[0025] (3) After step 2 is completed, the ingot is kept at 400° C. for 4 hours, and then extruded into an aluminum alloy wire with a diameter of 0.7 mm;

[0026] (4) First, the obtained aluminum alloy wire is made into an aluminum alloy wire mesh with a specification of 5mm*5mm, and the surface is pretreated to remove oil and dirt, and then the aluminum alloy wire m...

Embodiment 2

[0035] The material of the casting is ZL114, the shape of the casting is a cube, its height is 339mm, and the side length is 425mm. One side of the casting is in contact with the air during use. to improve corrosion resistance. The casting is prepared as follows:

[0036] (1), prepare required Al-20wt.%Mg ingot by conventional method;

[0037] (2), the obtained ingot is kept at 500° C. for 20 hours in an atmosphere;

[0038] (3) After step 2 is completed, the ingot is kept at 400° C. for 4 hours, and then extruded into an aluminum alloy wire with a diameter of 0.6 mm;

[0039] (4) First, the obtained aluminum alloy wire is made into an aluminum alloy wire mesh with a specification of 4mm*4mm, and the surface is pretreated to remove oil and dirt, and then the aluminum alloy wire mesh is arranged in the inner cavity of the mold, and the aluminum alloy wire mesh Leave a 2.5mm gap with the inner cavity of the casting mold, and the aluminum alloy wire mesh is connected to a low-...

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Abstract

The invention provides a method for alloying a magnesium element on the surface layer of an aluminum alloy casting. The method is characterized in that an aluminum alloy wire mesh with the diameter of not more than 0.7 mm is cast on the surface layer of the aluminum alloy casting, and the mesh specification of the aluminum alloy wire mesh is not more than 5mm*5mm. According to the method, not only is the excellent casting process performance of an original base material of the casting maintained, but also the corrosion resistance of a prepared aluminum-magnesium series cast aluminum alloy can be considered.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy casting, and in particular relates to a method for alloying magnesium element on the surface layer of an aluminum alloy casting. Background technique [0002] As a traditional light metal material, aluminum alloy is widely used in aerospace, aviation, automobile and other industries. Among them, casting aluminum alloy castings is one of the typical representatives of its application. With the expansion of the application of equipment from shallow sea to deep sea, the casting Aluminum alloy castings put forward higher requirements, especially the castings are required to have high intrinsic corrosion resistance to meet their continuous service performance requirements. [0003] At present, there are two main types of aluminum alloy castings used in ships. One is aluminum-silicon cast aluminum alloy, which has good casting process performance, but poor corrosion resistance. The second is th...

Claims

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Application Information

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IPC IPC(8): B22D19/16C22C21/06B22D18/06
CPCB22D19/16C22C21/06B22D18/06B22D27/09B22D27/04
Inventor 夏祥生黄树海万元元肖寒彭菲菲陈强
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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