Manufacture method of aluminum alloy composite plate for tank body of railway tanker

A technology of aluminum alloy plate and composite plate, applied in the direction of chemical instruments and methods, metal layered products, layered products, etc., can solve the problems of low tensile strength, low non-proportional elongation strength, etc., and achieve good forming performance and mechanical strength The effect of stable performance and good corrosion resistance

Active Publication Date: 2011-08-31
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for manufacturing aluminum alloy composite plates for railway tank car tank bodies, so

Method used

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specific Embodiment approach 1

[0008] Specific embodiment one: the manufacturing method of aluminum alloy composite plate for railway tanker tank body, the described manufacturing method is realized according to the following steps: 1. According to the mass percentage of the elements in the aluminum alloy plate, Mg: 2.2% to 2.8%, Cr: 0.15%~0.35%, Si≤0.25%, Fe≤0.40%, Cu≤0.10%, Mn≤0.10%, Zn≤0.10% and the balance is the ratio of Al, weigh the aluminum alloy ingot and magnesium ingot and add to the dry In a smelting furnace, melt at a temperature of 710°C to 750°C for 2.5 to 4.5 hours to obtain a base alloy melt; The speed is 60mm / min~65mm / min, the cooling water strength is 0.08MPa~0.15MPa and the cooling water temperature is 10℃~20℃, and the ingot is cast into an ingot with a thickness of 220mm~255mm, and the surface of the ingot is milled. The cast oxide skin of the base layer is obtained to obtain the base alloy ingot; 3. The base alloy ingot obtained in step 2 is subjected to homogenization annealing, the a...

specific Embodiment approach 2

[0009] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the mass percentages of elements in the aluminum alloy plate are Mg: 2.0%-2.6%, Cr: 0.13%-0.30%, Si: 0.02% ~0.20%, Fe: 0.01%~0.3%, Cu: 0.01%~0.08%, Mn: 0.02%~0.09%, Zn: 0.01%~0.09% and the balance of Al Weigh aluminum alloy ingots and magnesium ingots . Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0010] Specific embodiment 3: The difference between this embodiment and one of specific embodiments 1 to 2 is that in step 1, the mass percentages of elements in the aluminum alloy sheet are Mg: 2.3%, Cr: 0.2%, Si: 0.11%, Fe: The ratio of 0.16%, Cu: 0.05%, Mn: 0.06%, Zn: 0.06% and the balance of Al were weighed aluminum alloy ingots and magnesium ingots. Other steps and parameters are the same as one of the specific implementation modes 1 to 2.

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Abstract

The invention discloses a manufacture method of an aluminum alloy composite plate for a tank body of a railway tanker, relating to the manufacture of aluminum alloy composite plates and solving the problem of low tensile strength and low non-proportional extension strength of the pure aluminum plate adopted by the tank body of the railway tanker. The method comprises the steps of: 1, preparing analloy melt; 2, casting an alloy ingot; 3, uniformly annealing; 4, cladding; 5, thermally rolling, 6, annealing a finished product; and 7, finishing to obtain the aluminum alloy composite plate for the tank body of the railway tanker. The plate prepared by using the method has the advantages of straightness, uniform color, uniform and stable cladding layer thickness, excellent comprehensive mechanical property and better nitric acid corrosion resistance, wherein the excellent comprehensive mechanical property is shown as follows: the tensile strength is not less than 170N/mm<2>, non-proportional extension strength is not less than 70N/mm<2> and percentage elongation after fracture is not less than 20 percent. The invention can be used for processing and manufacturing the tank body of the railway tanker.

Description

technical field [0001] The invention relates to a method for manufacturing an aluminum alloy composite plate. Background technique [0002] At present, the tank bodies of the tank cars used in the railway are all made of pure aluminum plates with excellent corrosion resistance to nitric acid. The mechanical properties of pure aluminum plates are poor, as shown in: low tensile strength, only 60-100N / mm 2 ;The non-proportional elongation strength is low, not more than 15N / mm 2 ; Therefore, there are problems such as serious deformation and cracking of the tank body in use, which restricts the development of large-tonnage tank cars. Contents of the invention [0003] The object of the present invention is to provide a method for manufacturing aluminum alloy composite plates for railway tank car tank bodies, so as to solve the problems of low tensile strength and low non-proportional elongation strength of pure aluminum plates used in railway tank car tank bodies. [0004] A...

Claims

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Application Information

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IPC IPC(8): B32B15/20C22C21/06C22C21/02C22F1/04
Inventor 吕新宇冯正海罗建华王兆立师雪飞魏继承王京华
Owner NORTHEAST LIGHT ALLOY CO LTD
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