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Stainless steel/aluminum composite material and preparation method thereof

A technology of aluminum composite materials and stainless steel, applied in chemical instruments and methods, cleaning methods and utensils, cleaning methods using liquids, etc., can solve the problems of poor bonding between aluminum and stainless steel, and achieve strong bonding, good mechanical strength, colorful effect

Active Publication Date: 2011-03-30
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in the stainless steel / aluminum composite material in the prior art, the bonding force between aluminum and stainless steel is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] A kind of preparation method of above-mentioned stainless steel / aluminum composite material, it comprises the steps:

[0021] (1) Surface pretreatment: clean the surface of stainless steel plate, aluminum alloy plate and pure aluminum plate;

[0022] (2) One-time hot rolling: lamination of stainless steel plate and aluminum alloy plate, compound rolling after heating, and then heat treatment to form a primary hot-rolled plate;

[0023] (3) Secondary hot rolling: Laminate the pure aluminum plate on the aluminum alloy layer of the primary hot-rolled plate, perform composite rolling after heating, and then perform heat treatment.

[0024] Among them, the purpose of the surface pretreatment in step (1) is to remove impurities such as grease and dust on the surface of each raw material, so as to keep no impurities introduced in the subsequent hot rolling process and maintain the hot rolling effect.

[0025] Preferably, the surface pretreatment of the aluminum alloy plate an...

Embodiment 1

[0039] ① Pretreatment:

[0040] 4mm thick aluminum alloy plate (composition is 4.2wt% Cu, 0.7wt% Mn, 1.6wt% Mg, 0.15wt% Si, 0.05wt% Fe, the rest is Al), 4mm pure aluminum plate in the concentration of 25wt% NaOH Soak in the solution for 6 minutes, the temperature is controlled at 50°C, then rinse with cold water and hot water successively; then add 20wt% HNO 3 Soak in the solution for 8 minutes, rinse with cold water; finally put it in a drying oven at 180°C for 7 minutes.

[0041] Put the 3mm stainless steel plate (model 316) into the metal cleaning agent, control the temperature at 70°C, perform ultrasonic degreasing and purification treatment for 15 minutes, rinse with cold water; finally put it in a drying oven at 180°C for 7 minutes.

[0042] ②Primary hot rolling:

[0043] First, the stainless steel plate and the aluminum alloy plate are laminated to form a laminated plate, and they are sent together into a 2 Heating in a continuous heating furnace with a protective at...

Embodiment 2

[0049] The difference from Example 1 is that the composition of the aluminum alloy plate is: 3.0wt% Cu, 0.5wt% Mn, 1.2wt% Mg, 0.25wt% Si, 0.15wt% Fe, and the rest is Al. Other parts are with embodiment 1. Composite material A2 was made.

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PUM

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Abstract

The invention relates to a metal composite material and a preparation method thereof, in particular to a stainless steel / aluminum composite material and a preparation method thereof. The material comprises a three-layer structure formed by hot rolling, wherein the bottom layer is a stainless steel layer, the middle layer is an aluminum alloy layer, and the surface layer is a pure aluminum layer; and the aluminum ally contains elements of Cu, Mg and Mn. The preparation method of the material comprises the following steps of: cleaning the surface of a raw material plate; performing lamination, hot rolling and heat treatment on a stainless steel plate and an aluminum alloy plate to form a once hot rolled plate; and laminating a pure aluminum plate on the aluminum alloy layer of the once hot rolled plate to perform hot rolling and heat treatment. The stainless steel / aluminum composite material has high bonding force, and cannot deform, crinkle and delaminate in the subsequent stamping process and the like.

Description

technical field [0001] The invention relates to a metal composite material and a preparation method thereof, in particular to a stainless steel / aluminum composite material and a preparation method thereof. Background technique [0002] Stainless steel has the advantages of high strength, good rigidity, strong corrosion resistance, and good formability at room temperature, and is widely used in various industries. However, when stainless steel is used as the casing of electronic products such as mobile phones, its surface decoration technology is limited, and it is limited to several decorative effects such as mechanical polishing, wire drawing, sandblasting, PVD, and electroplating. [0003] At present, there are stainless steel / aluminum composite materials formed by hot rolling a pure aluminum layer on the surface of stainless steel. On the one hand, this material maintains the characteristics of high strength, good rigidity, and superior mechanical properties of stainless...

Claims

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Application Information

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IPC IPC(8): B32B15/01C22C21/16B21B1/22B21B47/00B21B37/74C23G1/22C23G1/12B08B3/12C21D1/00
Inventor 郭强
Owner BYD CO LTD
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