Continuous cast-rolling method of aluminum/aluminum composite boards

An aluminum composite panel and composite panel technology, applied in metal rolling, temperature control, etc., can solve the problems of labor-intensive, time-consuming welding, high energy consumption, etc., and achieve the effects of reducing production costs, reducing energy consumption, and simplifying the process

Inactive Publication Date: 2010-11-17
JIANGSU CAIFA ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is labor-intensive when turning and milling the surface of the ingot, the etching process is likely to cause environmental pollution, and the welding process is also time-consuming, so this production method seems relatively simple, but its production efficiency is low in actual operation. High energy consumption and intermittent production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0012] Example 1: Implement 4xxx / 3xxx / 4xxx three-layer composite. The 3xxx aluminum plate with a thickness of 6mm is rolled by casting and rolling, and the temperature after casting is 300°C. The 0.5mm thick 4xxx alloy is heated to a surface temperature of 720°C, superimposed on the upper and lower surfaces of the 3xxx aluminum alloy, and then sent to a roll preheated at 100°C for composite rolling. Subsequently, the composite-rolled composite plate is sent to a heat treatment furnace for diffusion annealing, the annealing temperature is 350°C, the temperature is kept for 1 hour, and the furnace is cooled to 150°C and then air-cooled. The total thickness of the composite plate before rolling is 7mm, the thickness after rolling is 5.6mm, the total reduction rate is 20%, and the bonding interface is metallurgical mechanical bonding.

example 2

[0013] Example 2: Implementation of 3xxx / 4xxx two-layer composite. The 3xxx aluminum plate with a thickness of 7mm is rolled by casting and rolling, and the temperature after casting is 400°C. The 1mm thick 4xxx alloy is heated to a surface temperature of 660°C, superimposed on the upper (or lower) surface of the 3xxx aluminum alloy, and sent to a roll preheated at 150°C for compound rolling. Subsequently, the composite rolled composite plate is sent to a heat treatment furnace for diffusion annealing. The annealing temperature is 400° C., the temperature is kept for 1 hour, and it is cooled to 150° C. and then air-cooled. The total thickness of the composite plate before rolling is 8mm, the thickness after rolling is 5.5mm, the total reduction rate is 31%, and the interface is firmly bonded.

example 3

[0014] Example 3: Implement 4xxx / 3xxx / 4xxx three-layer composite. The 3xxx aluminum plate with a thickness of 10mm is rolled by casting and rolling, and the temperature after casting is 400°C. The 2mm thick 4xxx alloy is heated to a surface temperature of 560°C, superimposed on the upper and lower surfaces of the 3xxx aluminum alloy, and sent to a roll preheated at 400°C for compound rolling. Subsequently, the composite rolled composite plate is sent to a heat treatment furnace for diffusion annealing, the annealing temperature is 550°C, the temperature is kept for 1 hour, and it is cooled to 150°C with the furnace, and then air-cooled. The total thickness of the composite plate before rolling is 14mm, the thickness after rolling is 9mm, the total reduction rate is 35.7%, and the interface is firmly bonded.

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PUM

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Abstract

The invention relates to a continuous cast-rolling method of aluminum / aluminum composite boards, comprising the following process steps of cast-rolling aluminum alloy, controlling temperature and heating a composite board. The heat treatment process of the composite board mainly comprises the following steps: firstly selecting the needed aluminum alloy component; cast-rolling the aluminum alloy component into the needed board thickness, wherein the board rolling temperature is 200-400 DEG C; heating the well-designed aluminum alloy board to be composited with a cast-rolling board, wherein the surface layer heating temperature is controlled at 560-720 DEG C, and the surface layer depth is controlled at 10-30% of the board thickness; laminating the heated aluminum alloy board and the cast-rolling board; entering a preheated secondary roller in advance to perform composite rolling, wherein the secondary roller preheating temperature is 100-400 DEG C; delivering a composite metal board after composite rolling into a heat treating furnace to perform diffusion, annealing and discharge; and air cooling to room temperature. The continuous cast-rolling method has the following major advantages that complicated chemical treatment on the aluminum plate surface is not needed, and interface metallurgical bonding of the aluminum / aluminum composite board is realized under smaller deformation conditions and deformation pressure by utilizing a cast-rolling method, thus obviously reducing the heat-rolling cost, and improving the interface bonding strength.

Description

Technical field [0001] The invention relates to a metal material forming and processing technology, in particular to a continuous casting and rolling method for aluminum / aluminum composite plates. Background technique [0002] The composite and functionalization of metallic materials is the main trend in the development of metallic materials in the 21st century. At present, the bimetallic materials produced by the composite method have been widely used in the aviation, petroleum, chemical, shipbuilding, automotive, electronics and other industrial fields. Its products include: steel / aluminum, stainless steel / aluminum, nickel / stainless steel, copper / steel, copper / aluminum, aluminum / titanium and other composite panels. [0003] The aluminum / aluminum composite board mainly adopts solid-solid composite technology. Generally, the surface of ingots with two different alloy compositions is milled to a certain thickness, and then the surface is cleaned according to the large ingot etching...

Claims

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Application Information

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IPC IPC(8): B21B1/46B21B37/74C21D1/26
Inventor 不公告发明人
Owner JIANGSU CAIFA ALUMINUM
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