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Aluminum alloy heat exchanger for exhaust gas recirculation system

A recirculation system, aluminum alloy technology, applied in exhaust gas recirculation, indirect heat exchanger, charging system, etc., to achieve long life and slow corrosion rate

Inactive Publication Date: 2020-11-13
FURUKAWA SKY ALUMINUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the tubes is to allow fluids such as refrigerants to circulate, so if a leak occurs due to pitting, it will be fatal to the heat exchanger

Method used

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  • Aluminum alloy heat exchanger for exhaust gas recirculation system
  • Aluminum alloy heat exchanger for exhaust gas recirculation system
  • Aluminum alloy heat exchanger for exhaust gas recirculation system

Examples

Experimental program
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Embodiment

[0080] (Example, Comparative Example and Reference Example)

[0081]

[0082] Aluminum alloy ingots for pipe core material, sacrificial anti-corrosion material, and brazing filler metal with the compositions shown in Tables 1 to 3 were separately cast by semi-continuous casting, chamfered, and homogenized at 520°C for 6 hours. deal with.

[0083] Next, according to the combination shown in Table 5, the ingot for the sacrificial anti-corrosion material was stacked on one side of the ingot for the core material, and the ingot for the brazing material was stacked on the opposite side when the brazing filler metal was also clad. Create stacked ingots. It should be noted that the thicknesses of the sacrificial anti-corrosion material and the brazing filler metal were adjusted so that the cladding ratios became 10% respectively.

[0084] Next, the stacked ingots were heat-treated to 520° C. before the hot rolling forming process, and immediately hot-rolled to produce a 3.5 mm-th...

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Abstract

Provided is an aluminum alloy heat exchanger for exhaust gas recirculation system obtained by brazing a fin material to a tube material. The fin material comprises: a core material containing 0.05-1.50% by mass Si, and 0.40-2.00% by mass Mn; and a brazing material containing 3.00-13.00% by mass Si and clad on both sides of the core material. The tube material comprises: a core material containing0.05-1.50% by mass Si, 0.05-3.00% by mass Cu, and 0.40-2.00% by mass Mn; and a sacrificial anti-corrosion material containing 2.00-6.00% by mass Zn and clad on the inner surface of the core material.The ratio of the surface area Sb (mm<2>) of the fin material to the surface area Sa (mm<2>) of the sacrificial anti-corrosion material is less than 200%. According to this invention it is possible toprovide an aluminum alloy heat exchanger for exhaust gas recirculation system which has a slow corrosion rate and long service life in ammonium environments in which ammonium is contained in the condensate water of exhaust gas.

Description

technical field [0001] The present invention relates to an aluminum alloy for an exhaust gas recirculation system for cooling exhaust gas by heat exchange in an exhaust gas recirculation system for recirculating exhaust gas of an internal combustion engine such as a diesel engine or a gasoline engine mounted on a vehicle Heat Exchanger. Background technique [0002] Aluminum (Al) alloys are light in weight and excellent in thermal conductivity, can achieve high corrosion resistance by appropriate treatment, and can achieve efficient joining by brazing using brazing sheets, so they are widely used in automobiles, etc. Heat exchanger materials are reused. [0003] In recent years, as a measure to improve the performance of automobiles or to protect the environment, a part of the combustion gas (exhaust gas) of the engine is introduced to the intake side and mixed with the intake gas to improve fuel consumption and reduce the combustion temperature. To reduce NOx emissions, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00B23K35/14B23K35/22B23K35/28F02M26/29F28F21/08
CPCB23K35/286C22C21/00C22C21/02C22C21/10F28D2021/008F28F19/06F28F21/084F02M26/29B23K1/0012B23K35/288B23K2103/10C22C21/14C22C21/16C22C21/18
Inventor 大谷良行小路知浩福元敦志西山幸贵池田亨篠田贵弘
Owner FURUKAWA SKY ALUMINUM CORP
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