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Vacuum brazing oil cooler bottom plate material and preparation method thereof

An oil cooler and brazing technology, which is applied in the field of materials, can solve problems such as unsightly appearance, coarse grains, and easy material climbing

Active Publication Date: 2021-06-01
YINBANG CLAD MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of conventional vacuum brazed oil cooler bottom plate made of 6 series aluminum alloy and its composite material, which are not beautiful and easy to climb, the invention discloses a vacuum brazed oil cooler bottom plate material and a preparation method thereof. The prepared material has coarse grains, the average grain size is greater than 400μm, the material has no climbing phenomenon after brazing, and the surface color is uniform

Method used

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  • Vacuum brazing oil cooler bottom plate material and preparation method thereof
  • Vacuum brazing oil cooler bottom plate material and preparation method thereof
  • Vacuum brazing oil cooler bottom plate material and preparation method thereof

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preparation example Construction

[0034] The preparation method of the bottom plate material of the vacuum brazing oil cooler provided by the present invention comprises: compound hot rolling, first cold rolling, first annealing, second cold rolling, and second annealing. Such as figure 2 As shown, specifically:

[0035] Composite hot-rolling: hot-rolling the skin material and the core material to obtain a hot-rolled plate; the hot-rolling temperature is 440°C-480°C, and the holding time is 4-8h; the thickness of the hot-rolled plate is 5.0-8.0mm.

[0036] The first cold rolling: performing multi-pass cold rolling on the hot-rolled sheet, the deformation of each pass is 10-16%, and obtaining a cold-rolled sheet 1 with a thickness of 3.50-6.50mm;

[0037] First annealing: performing recrystallization annealing on the cold-rolled sheet 1 to obtain a sheet; the temperature is 370° C.-410° C., and the holding time is 3-6 hours.

[0038] The second cold rolling: performing multi-pass cold rolling on the plate, t...

Embodiment 1

[0052] The bottom plate material of the vacuum brazed oil cooler provided in this embodiment, the skin material is 3003 aluminum alloy, and the core material is 6A02 aluminum alloy.

[0053] For the preparation process of the bottom plate material of the above-mentioned vacuum brazing oil cooler, see figure 2 ,Specifically:

[0054] Alloy melting and casting: Melt the alloy according to the alloy composition of 3003 and 6A02, and cast 3003 and 6A02 alloy ingots by semi-continuous casting method, the ingot size is 450×1620×7000mm.

[0055] Sawing and face milling: After sawing the head and tail and milling the surface of the two alloy ingots, the size is about 430×1620×6500mm.

[0056] Preparation of skin material: After heating 3003 aluminum alloy to 440°C for 6 hours, hot rolling to 29.5mm in multiple passes, and cutting to make a thick plate with a length of 6500mm.

[0057] Composite hot rolling: 430mm 6A02 aluminum alloy ingot and 29.3mm surface treated 3003 aluminum al...

Embodiment 2

[0066] The bottom plate material of the vacuum brazed oil cooler provided in this embodiment, the skin material is 3003 aluminum alloy, and the core material is 6061 aluminum alloy.

[0067] For the preparation process of the bottom plate material of the above-mentioned vacuum brazing oil cooler, see figure 2 ,Specifically:

[0068] Alloy melting and casting: Melt the alloy according to the alloy composition of 3003 and 6061, and cast 3003 and 6061 alloy ingots by semi-continuous casting method, the ingot size is 450×1620×7000mm.

[0069] Sawing and face milling: After sawing the head and tail and milling the surface of the two alloy ingots, the size is about 430×1620×6500mm.

[0070] Preparation of leather material: After heating 3003 aluminum alloy to 480°C for 4 hours, hot rolling to 14mm by multiple passes, and cutting to make a thick plate with a length of 6500mm.

[0071] Composite hot rolling: stack 430mm 6061 aluminum alloy ingots and 13.7mm 3003 aluminum alloy plat...

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Abstract

The invention discloses a vacuum brazing oil cooler bottom plate material and a preparation method thereof. The preparation method comprises the steps that composite hot rolling is carried out, specifically, a skin material and a core material are compounded and then subjected to hot rolling, and a hot rolled plate is obtained; primary cold rolling is carried out, specifically, the hot rolled plate is subjected to multi-pass cold rolling, the deformation quantity of each pass is 10%-16%, and a cold rolled plate 1 is obtained; primary annealing is carried out, specifically, recrystallization annealing is carried out on the cold rolled sheet 1 to obtain a sheet material; secondary cold rolling is carried out, specifically, the plate is subjected to multi-pass cold rolling, the deformation quantity of each pass is 10%-16%, and a cold rolled plate 2 is obtained; secondary annealing is carried, specifically, recrystallization annealing is carried out on the cold rolled sheet 2; and a skin material is 3003 aluminum alloy, and a core material is 6-series aluminum alloy. According to the preparation method, the composite material with the thickness of 2.20-4.00 mm and the average grain size of greater than 400 [mu]m is prepared by adopting a method of combining non-uniform treatment, small-deformation cold rolling and recrystallization annealing, and the problems that the grain of the material produced by a conventional manufacturing method is fine and the brazing filler metal is prone to climbing to a stamping mounting hole or the surface are solved.

Description

technical field [0001] The invention relates to the field of materials, in particular to a bottom plate material of a vacuum brazing oil cooler and a preparation method thereof. Background technique [0002] The oil cooler is an important part of the automobile heat exchange system to ensure the safe operation and life of the automobile engine. Most of them adopt an aluminum alloy integral welded structure composed of multi-layer densely arranged zigzag staggered fins connected to the bottom plate. The main production process is brazing one-time forming. Aluminum alloy composite panels are light in weight, good in corrosion resistance, good in brazing, and reliable in performance, so they are widely used in automotive heat exchange systems. [0003] The bottom plate of traditional automobile oil cooler is made of 3××× series aluminum alloy and its modified 3××× series aluminum alloy plate. The yield strength after brazing is generally low, which cannot meet the strength req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B47/00C22F1/04C22F1/043C22F1/047
CPCB21B1/38B21B47/00C22F1/04C22F1/043C22F1/047B21B2001/386
Inventor 夏承东任峰岩李卫东严安唐友增刘二磊
Owner YINBANG CLAD MATERIAL