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Method for manufacturing aluminum alloy thick plate, and aluminum alloy thick plate

A manufacturing method and technology of aluminum alloy, which is applied in the direction of manufacturing tools, casting equipment, metal processing equipment, etc., can solve the problems of difficult control of surface state and flatness, prone to uneven cross-section and surface, and increased working procedures, etc.

Active Publication Date: 2009-12-16
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) In the method of rolling after casting, because the surface state and flatness (especially the flatness in the longitudinal direction) of the rolled sheet are controlled only by the roll, and the surface of the rolled sheet is formed due to hot rolling Thick oxide film, so it is difficult to control the surface state and flatness
[0008] (2) Since it is difficult to control the plate thickness with rolls, it is difficult to improve the accuracy of the plate thickness
In addition, the size of the intermetallic compound becomes larger in the central part of the thickness direction, so when aluminum anodizing (alumite) is performed, the cross-section and surface in the thickness direction tend to be uneven.
In addition, when rolling ingots, the increase in the number of rolling operations increases the number of operations and increases the cost.

Method used

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  • Method for manufacturing aluminum alloy thick plate, and aluminum alloy thick plate
  • Method for manufacturing aluminum alloy thick plate, and aluminum alloy thick plate
  • Method for manufacturing aluminum alloy thick plate, and aluminum alloy thick plate

Examples

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Embodiment

[0240] Hereinafter, embodiments of the invention of the present application will be described.

no. 1 example

[0242] This embodiment relates to the first invention. The aluminum alloy used in this example is a 5000 series Al-Mg series alloy.

[0243]The alloys 1A to 12A shown in Table 1 were used as the example alloys, and the alloys 13A to 22A were used as the comparative example alloys.

[0244]

[0245] (deal with)

[0246] First, the alloys 1A to 22A are processed in this order in a melting step, a dehydrogenation step, a filtration step, and a casting step to produce an ingot with a plate thickness of 500 mm.

[0247] Next, a sliced ​​material and a hot-rolled material are produced from the ingot. The sliced ​​material is obtained by processing the ingot in a slicing step. The hot-rolled material is obtained by performing hot rolling after heat-treating the ingot. The sliced ​​material and the hot-rolled material are aluminum alloy thick plates with a thickness of 20 mm × a width of 1000 mm × a length of 2000 mm, respectively.

[0248] Then, the sliced ​​material is processed in a ...

no. 3 example

[0291] This embodiment relates to the second invention. The aluminum alloy used in this embodiment is a 3000 series Al-Mn series alloy.

[0292] The alloys 23A and 24A shown in Table 5 were used as the example alloys, and the alloys 25A and 26A were used as the comparative example alloys.

[0293] [table 5]

[0294]

[0295] (deal with)

[0296] First, the alloys 23A to 26A are processed in this order in a melting step, a dehydrogenation step, a filtering step, and a casting step to produce an ingot with a plate thickness of 500 mm.

[0297] Next, a sliced ​​material and a hot-rolled material are produced from the ingot. The sliced ​​material is obtained by processing the ingot in a slicing step. The hot-rolled material is obtained by performing hot rolling after heat-treating the ingot. The sliced ​​material and the hot-rolled material are aluminum alloy thick plates with a thickness of 20 mm × a width of 1000 mm × a length of 2000 mm, respectively.

[0298] Then, the sliced ​​...

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Abstract

Disclosed is a method for producing an aluminum alloy thick plate, which is characterized by sequentially performing, in the following order, a melting step (S1) wherein an aluminum alloy consisting of a predetermined amount of Mg, at least one of Si, Fe, Cu, Mn, Cr, Zn, Ti and Zr, and the balance of Al and unavoidable impurities; a hydrogen gas removing step (S2) wherein a hydrogen gas is removed from the melted aluminum alloy; a filtering step (S3) wherein inclusions are removed from the aluminum alloy from which a hydrogen gas is removed; a casting step (S4) wherein an ingot is produced by casting the aluminum alloy from which inclusions are removed; a slicing step (S5) wherein an aluminum alloy thick plate having a predetermined thickness is produced by slicing the ingot; and a heat treatment step (S6) wherein the aluminum alloy thick plate having a predetermined thickness is heat-treated by being maintained at a temperature not less than 400 DEG C but less than the melting point for 1 or more hours.

Description

Technical field [0001] The invention relates to a method for manufacturing an aluminum alloy thick plate and an aluminum alloy thick plate. Background technique [0002] Generally, aluminum alloy materials such as aluminum alloy thick plates are used in various applications. For example, semiconductor-related devices such as baseplates, conveying devices, and vacuum chambers; electrical and electronic components and their manufacturing devices; daily necessities; mechanical components, etc. [0003] Such aluminum alloy materials are generally manufactured as follows. That is, an aluminum alloy as a raw material is melted and cast to produce an ingot, homogenization heat treatment is performed as needed, and then the ingot is rolled to a predetermined thickness (for example, refer to paragraphs 0037 to 045 of Patent Document 1). [0004] In addition, the following materials were used as raw materials for the metal mold used for the extrusion metal mold. That is, steel, cast steel,...

Claims

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Application Information

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IPC IPC(8): C22B21/06B22D1/00B22D21/04B22D43/00C22B9/02C22B9/05C22C1/02C22C21/00C22C21/02C22C21/06C22C21/10C22F1/04C22F1/047C22F1/05C22F1/053C22F1/00
CPCY02P10/20
Inventor 小林一德德田健二加藤友晴稻叶隆
Owner KOBE STEEL LTD
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