High-drooping-resistance high-strength composite aluminum foil core material alloy and preparation method thereof

A technology of composite aluminum foil and aluminum alloy plate, which is applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problem that it is difficult to obtain thick and long recrystallized grains, and achieve easy realization, corrosion inhibition, and simple method easy effect

Inactive Publication Date: 2017-11-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, it is difficult to obtain coarse elongated recrystallized grains from the composite brazed aluminum foil core material after high-temperature homogenization treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, use 1290 grams of industrial pure aluminum ingot, 16 grams of aluminum-iron alloy, 256 grams of aluminum-manganese alloy, 23 grams of aluminum-copper alloy, 2 grams of instant silicon and 5 grams of Cr agent for melting; the melting temperature is 720 ° C, and the master alloy is melted and stirred for 2 Minutes, keep warm for 30 minutes and carry out refining and purification treatment, then add instant silicon and aluminum foil wrapped chromium agent after heating up to 780°C, cool down to 720°C after melting, clean the aluminum slag on the surface of the aluminum liquid; pour 250°C after holding for 30 minutes In the preheated plate mold, after it cools down, it is casted into a 20mm thick aluminum alloy plate; sampling is carried out, and the weight percentage content of each alloy element of the aluminum alloy plate is analyzed by direct reading spectrum: iron 0.21%, silicon 0.15%, 1.57% manganese, 0.69% copper, 0.19% chromium, and the rest is aluminum; final...

Embodiment 2

[0026] First, use 1300 grams of industrial pure aluminum ingot, 18 grams of aluminum-iron alloy, 260 grams of aluminum-manganese alloy, 25 grams of aluminum-copper alloy, 3 grams of instant silicon and 1.5 grams of Cr agent for melting; the melting temperature is 720 ° C, and the intermediate alloy is melted and stirred for 2 Minutes, keep warm for 30 minutes and carry out refining and purification treatment, then add instant silicon and aluminum foil wrapped chromium agent after heating up to 780°C, cool down to 720°C after melting, clean the aluminum slag on the surface of the aluminum liquid; pour 250°C after holding for 30 minutes In the preheated plate mold, after it cools down, it is casted into a 20mm thick aluminum alloy plate; sampling is carried out, and the weight percentage content of each alloy element of the aluminum alloy plate is analyzed by direct reading spectrum: iron 0.23%, silicon 0.21%, 1.59% manganese, 0.61% copper, 0.07% chromium, and the rest is aluminu...

Embodiment 3

[0029] First, 1290 grams of industrial pure aluminum ingot, 15 grams of aluminum-iron alloy, 240 grams of aluminum-manganese alloy, 20 grams of aluminum-copper alloy, 3 grams of instant silicon and 2.5 grams of Cr agent were used for melting; the melting temperature was 720 ° C, and the master alloy was melted and stirred for 2 Minutes, keep warm for 30 minutes and carry out refining and purification treatment, then heat up to 780°C, add instant silicon and chrome agent wrapped in aluminum foil, cool down to 720°C after melting, clean the aluminum slag on the surface of the aluminum liquid; pour 250°C after holding for 30 minutes In the preheated plate mold, after it cools down, it is casted into a 20mm thick aluminum alloy plate; sampling is carried out, and the weight percentage content of each alloy element of the aluminum alloy plate is analyzed by direct reading spectrum: iron 0.19%, silicon 0.18%, 1.42% manganese, 0.57% copper, 0.11% chromium, and the rest is aluminum; fi...

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Abstract

The invention discloses a high-sagging-resistant high-strength composite aluminum foil core material alloy and a preparation method thereof. The core material alloy is composed of 0.15-0.40% iron, 0.05-0.25% silicon, 0.6-1.6% manganese, 0.4-0.8% copper, 0.1-0.4% chromium and the rest is aluminum. The preparation method of the core material alloy mainly includes: 1. Selecting an intermediate alloy (except Al-Cr alloy) for smelting, stirring, refining and standing; 2. Adding Cr agent, stirring and standing, and casting the molten aluminum 3. The core aluminum alloy plate is homogeneously treated, kept warm and then air-cooled, and then surface treated. The advantage of the present invention is that by optimizing the composition ratio of the composite aluminum foil core material alloy, combined with the above manufacturing method, casting rolling and heat treatment, a composite aluminum foil core material with excellent sag resistance and high tensile strength can be obtained; the method of the present invention is simple It is easy to implement and easy to implement, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a core material alloy and a preparation method thereof, in particular to a high-sagging high-strength composite aluminum foil core material alloy and a preparation method thereof. Background technique [0002] Composite brazing aluminum foil is widely used in automotive heat exchangers, power station air-cooled island heat exchangers and other fields, and gradually develops in the direction of high strength and light weight; it consists of a core material layer (3 series Al-Mn alloy) and double-sided / single-sided A composite brazing aluminum foil composed of a low-melting point cladding layer (near eutectic Al-Si alloy) with a thickness of 8-12%, which is heated to 580-610°C during the brazing forming process, and the cladding layer (melting point 565 ℃~575℃) melts, under the action of surface tension, gravity and other effects, it flows to the joint gap through capillary movement, infiltrates and expands. As the temperature de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/14C22C1/03C22C1/06C22F1/04C22F1/057B23K35/28
CPCC22C21/00B23K35/286C22C1/026C22C1/03C22C1/06C22C21/14C22F1/04C22F1/057
Inventor 涂益友李兆银何晗蒋建清
Owner SOUTHEAST UNIV
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