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Rare earth aluminum alloy for heat exchanger fins and preparation method thereof

A heat exchanger, aluminum alloy technology, 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 invention patents involves the influence of rare earth elements on the performance of common heat exchanger fin alloys (medium silicon, high manganese and zinc alloys)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In this embodiment, an alloy slab containing Mn1.6%, Si0.8%, Fe0.25%, Zn1.5%, Ti0.05%, Ce0.15%, and the balance of Al is firstly prepared by smelting and casting methods. The alloy raw material is melted at 760° C. in an inert gas protection melting furnace, poured into a mold and cooled to obtain a casting alloy billet with a thickness of 30-300 mm. The alloy billet is face-milled and hot-rolled into a plate with a thickness of 3.1mm after being heated at 500°C, then cold-rolled to a thickness of 0.15mm in multiple passes, annealed at 300°C and then cold-finish-rolled to a thickness of 0.1mm. After simulating brazing heat treatment, the mechanical properties of the alloy were tested with an electronic tensile testing machine. The tensile strength of the alloy was 120MPa, and the yield strength was 43MPa. The brazing treatment alloy foil material prepared in this embodiment is subjected to H as described in the ASTM G69 standard. 2 o 2 The electrochemical corrosion po...

Embodiment 2

[0020] The method is the same as that in Example 1, except that the present embodiment adopts smelting and casting methods to prepare a compound containing Mn1.6%, Si0.7%, Fe0.25%, Zn1.5%, Ce0.2%, and the balance is Al Alloy slab, after face milling, heated at 500°C, hot-rolled to a thickness of 3mm, then cold-rolled to a thickness of 0.15mm, annealed at 300°C, and cold-finish-rolled to a thickness of 0.09mm. The mechanical properties of the simulated brazing heat treatment alloy foil were tested by an electronic tensile testing machine. The tensile strength of the alloy was 115MPa, and the yield strength was 42MPa.

Embodiment 3

[0022] The method is the same as in Example 1, except that the present example adopts smelting, casting and hot rolling methods to prepare Mn1.7%, Si0.65%, Fe0.22%, Zn1.5%, Zr0.1%, Ce0. 1%, Ti0.05%, the balance is Al alloy plate, then cold rolled to 0.15mm, cold finish rolled to 0.09mm thickness after annealing at 300°C. The braze-treated alloy foils are described in ASTM G69 standard H 2 o 2 The electrochemical corrosion potential was measured in / NaCl solution, and the corrosion potential of the alloy foil was -810mV.

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Abstract

The invention discloses a rare earth aluminum alloy used for heat exchanger fins in the technical field of metal materials and a preparation method thereof. The composition ratio of the alloy is: Mn: 1.0-2.0wt%, Si: 0.3-1.3wt% , Fe: 0.1-0.6wt%, Zn: 0.5-4.0wt%, Zr: 0-0.2wt%, Ti: 0-0.2wt%, Ce or rare earth whose main component is Ce element: 0.06-0.5wt%, impurity The element content is less than 0.05wt%, and the rest is Al. The invention realizes micro-alloying and electrochemical corrosion potential control by adding rare earth elements to the medium-silicon-high-manganese aluminum alloy, and adopts casting, hot rolling, and cold rolling processes to prepare corresponding plate and strip materials.

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 for heat exchanger fins and a preparation method thereof. Background technique [0002] Al-Mn heat transfer materials represented by 3003Al alloy are widely used in heat exchanger parts such as water tank radiators, evaporators, and condensers. The rapid development of the automotive industry requires heat transfer materials to have better mechanical properties, more effective heat dissipation, and corrosion resistance. Therefore, traditional Al-Mn alloys will be difficult to meet future high-performance requirements, and new alloys must be developed through alloying design. . Al-Mn alloy strips for heat exchanger fins are generally manufactured by casting, hot rolling, cold rolling and annealing processes. Controlling the chemical composition and microstructure of the alloy strips is the key t...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C21/02C22C21/10C22F1/04C22F1/043C22F1/053F28F21/08
Inventor 丁冬雁张俊超高勇进陈国桢陈为高尤小华
Owner SHANGHAI JIAO TONG UNIV