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Rare earth aluminum alloy for heat exchanger and preparation method thereof

A technology of heat exchanger and aluminum alloy, applied in the field of rare earth aluminum alloy and its preparation

Inactive Publication Date: 2011-12-21
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above heat-resistant aluminum alloys has added rare earth elements, so the influence of rare earth elements on the properties of these low-silicon alloys for heat exchanger tubes or plates has rarely been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this embodiment, an alloy slab containing Si0.08%, Mn1.52%, Cu0.6%, Mg0.25%, Fe0.25%, Ce0.2%, and the balance of Al is first prepared by smelting and casting methods. After face milling, heat at 500°C and hot-roll to a plate with a thickness of 3mm, then cold-roll to a thickness of 0.35mm, anneal at 300°C and finish cold-roll to 0.25mm, and test it with an electronic tensile testing machine after simulated brazing heat treatment According to the mechanical properties of the alloy, the tensile strength of the alloy is 181MPa, and the yield strength is 67MPa.

Embodiment 2

[0024] In this example, the smelting and casting method is used to first prepare the steel containing Si0.1%, Mn1.7%, Cu0.6%, Mg0.3%, Fe0.3%, Zr0.1%, Ce0.25%, and the balance is Al The alloy slab is hot-rolled to a thickness of 3mm after face milling and heated at 500°C, then cold-rolled to 0.35mm, annealed at 300°C and cold-finish-rolled to 0.25mm. After simulated brazing heat treatment, the mechanical properties of the alloy were tested with an electronic tensile testing machine. The tensile strength of the alloy was 152MPa, and the yield strength was 51MPa.

Embodiment 3

[0026] Other operation methods are the same as in Example 1, except that this example adopts smelting and casting methods to first prepare Si0.08%, Mn1.7%, Cu0.58%, Mg0.25%, Fe0.25%, Ce0.3 %, Ti0.05%, and the balance is Al alloy ingots, sampling by wire cutting, and obtaining the metallographic structure after hot mounting, grinding, polishing, and oxidation corrosion. The average grain size measured is less than 1 mm.

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Abstract

The invention discloses a rare earth aluminum alloy used for heat exchangers in the technical field of metal materials and a preparation method thereof. The composition ratio of the alloy is: Si: 0.06-0.5%, Mn: 1.1-1.9%, Cu: 0.3 ~1.0%, Mg: 0~0.7%, Fe: 0.1~0.6%, Zr: 0~0.2%, Ti: 0~0.2%, Ce or rare earth mainly composed of Ce element: 0.06~0.5%, impurity element content Less than 0.05%, the rest is Al. The invention realizes microalloying and microstructure control by adding rare earth elements to low-silicon and high-manganese aluminum alloys, and adopts casting, hot-rolling and cold-rolling processes to prepare corresponding plates and strips.

Description

technical field [0001] The invention relates to an alloy in the technical field of metal materials and a preparation method thereof, in particular to a rare earth aluminum alloy used in a heat exchanger and a preparation method thereof. Background technique [0002] The Al-Mn alloy represented by 3003Al alloy has many excellent properties such as light weight, good formability, high thermal conductivity, good weldability, excellent corrosion resistance, etc., so it is widely used in evaporators, condensers, etc. radiator parts. However, the development of the automotive industry requires radiators to have better mechanical properties and more effective heat dissipation. Therefore, the traditional Al-Mn alloys will be difficult to meet the high performance requirements in the future, and must be modified. At present, the main method to improve the performance of Al-Mn alloys is to carry out alloying design. Cu, Mn, Mg, Zn, Fe, Si are widely used alloying elements. These a...

Claims

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Application Information

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IPC IPC(8): C22C21/00F28F21/08
Inventor 丁冬雁冯静高勇进陈国桢陈为高尤小华
Owner SHANGHAI JIAO TONG UNIV
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