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A kind of magnesium-aluminum composite plate and preparation method thereof

A composite sheet, magnesium-aluminum technology, applied in the field of magnesium-aluminum composite sheet and its preparation, can solve the problems affecting the mechanical properties of the composite sheet, poor microstructure, limited bonding strength, etc. The effect of excellent size and mechanical properties

Active Publication Date: 2022-04-15
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the above method, the billet is directly rolled in the as-cast state, the microstructure at the material bonding interface is poor, the crystal grains are coarse, and there is a partial oxide film layer at the bonding interface, which is not conducive to the bonding between the two metals, resulting in Bond strength is limited, which ultimately affects the mechanical properties of the resulting composite sheet

Method used

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  • A kind of magnesium-aluminum composite plate and preparation method thereof
  • A kind of magnesium-aluminum composite plate and preparation method thereof
  • A kind of magnesium-aluminum composite plate and preparation method thereof

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preparation example Construction

[0018] The invention provides a method for preparing a magnesium-aluminum composite plate, which specifically includes the following five steps.

[0019] Step 1: Processing the magnesium alloy into a magnesium alloy rod with a predetermined size, and then removing oil stains and oxides on the surface of the magnesium alloy rod by means of chemical cleaning and mechanical grinding. Next, if figure 2 As shown, the magnesium alloy rod 2 is fixed in the cavity 11 of the casting mold 1, and the casting mold 1 and the magnesium alloy rod 2 are preheated at 150-200° C. for 1-2 hours.

[0020] In the above steps, the processed magnesium alloy rods need to remove the oil stains and oxides on the surface, otherwise the oil stains and oxides will affect the subsequent combination of magnesium and aluminum alloys, and the magnesium alloy rods after chemical cleaning and mechanical grinding The fresh surface of the material will be exposed, which is conducive to the subsequent combinatio...

Embodiment 1

[0035] Step 1: Process the magnesium alloy into a magnesium alloy rod with a diameter of 75 mm, remove surface oil and oxides by means of steam degreasing, solvent washing, acid etching solution cleaning and mechanical grinding, and then fix the magnesium alloy rod on the In the cavity of the casting mold, the diameter of the cavity is 92 mm, and the casting mold and the magnesium alloy rod are preheated at 200° C. for 1.5 h.

[0036] Step 2: Melting the aluminum alloy to obtain an aluminum alloy melt in a molten state. When the temperature of the aluminum alloy melt reaches 710° C., keep the aluminum alloy melt for 5 minutes.

[0037] Step 3: Pour the aluminum alloy melt into the cavity of the casting mold so that the aluminum alloy melt completely covers the magnesium alloy rod, then cool at room temperature, and obtain a magnesium-aluminum composite ingot after solidification.

[0038] Step 4: Place the magnesium-aluminum composite ingot in an extrusion mold, firstly prehea...

Embodiment 2

[0041] Step 1: Process the magnesium alloy into a magnesium alloy rod with a diameter of 70 mm, remove surface oil and oxides by means of steam degreasing, solvent washing, acid etching solution cleaning and mechanical grinding, and then fix the magnesium alloy rod on the In the cavity of the casting mold, the diameter of the cavity is 92 mm, and the casting mold and the magnesium alloy rod are preheated at 200° C. for 1.5 h.

[0042] Step 2: Melting the aluminum alloy to obtain an aluminum alloy melt in a molten state. When the temperature of the aluminum alloy melt reaches 695° C., keep the aluminum alloy melt for 5 minutes.

[0043] Step 3: Pour the aluminum alloy melt into the cavity of the casting mold so that the aluminum alloy melt completely covers the magnesium alloy rod, then cool at room temperature, and obtain a magnesium-aluminum composite ingot after solidification.

[0044] Step 4: Place the magnesium-aluminum composite ingot in an extrusion mold, firstly prehea...

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Abstract

The invention discloses a magnesium-aluminum composite plate and a preparation method thereof. The magnesium alloy composite plate includes a magnesium alloy core layer, an aluminum alloy cladding layer, and a bonding interface layer formed between the magnesium alloy core layer and the aluminum alloy cladding layer. The preparation method includes: casting molten aluminum alloy on a magnesium alloy bar to obtain a magnesium-aluminum composite ingot; then extruding the magnesium-aluminum composite ingot to obtain a magnesium-aluminum composite billet; finally, the magnesium-aluminum composite The composite billet is rolled to obtain a magnesium-aluminum composite plate. In the invention, the aluminum alloy and the magnesium alloy are preliminarily compounded by casting, and then the magnesium alloy and the boss alloy are formed into a metallurgical bond through an extrusion process, and finally the bonding strength of the magnesium alloy and the aluminum alloy is further improved by rolling. Through the synergistic effect of the above three processes, a magnesium-aluminum composite plate with higher bonding strength and better mechanical properties can be obtained.

Description

technical field [0001] The invention relates to the technical field of material processing engineering, in particular to a magnesium-aluminum composite plate and a preparation method thereof. Background technique [0002] The invention patent with the publication number CN103691910A discloses a method for preparing aluminum-clad magnesium composite plates. The steps are as follows: mechanically treat and chemically clean the magnesium alloy parts of the preset size, remove the oil stains and oxides on the surface, and then place them in an air furnace. Preheat treatment; preheat the casting mold together with the aluminum alloy bottom pad at 450~650℃ for 50 minutes; take out the preheated mold, place the preheated magnesium alloy block in the mold, and then control the pouring temperature at 720~ The 760°C aluminum alloy melt is evenly poured around the magnesium alloy block until the aluminum liquid just covers the magnesium block; quickly quench the entire casting mold int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/02B22D19/16
CPCB21C37/02B22D19/16
Inventor 韩硕文丹华郭强
Owner BYD CO LTD