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

A manufacturing method and aluminum alloy technology, which is applied in the manufacture of aluminum alloy thick plates and the field of aluminum alloy thick plates, can solve problems such as difficulty in controlling surface state and flatness, difficulty in controlling plate thickness, and deterioration of plate thickness accuracy, so as to achieve operation Elimination of process, prevention of surface defects, effects of defect suppression

Active Publication Date: 2012-10-31
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the method of rolling after casting, the control of the surface condition and flatness (especially the flatness in the longitudinal direction) of the rolled sheet is carried out only by rolling rolls. In addition, hot rolling causes thick oxidation on the surface of the rolled sheet. Film, there is a problem that it is difficult to control the surface state and flatness
In addition, it is difficult to control the plate thickness with rolling rolls, and there is a problem that the plate thickness accuracy deteriorates
In the center part in the thickness direction, the size of the intermetallic compound becomes large, and thus, in the case of aluminum oxide film treatment, there is a problem that the surface of the cross-section in the thickness direction becomes uneven
In addition, in the case of rolling an ingot, there is a problem of an increase in cost due to an increase in the number of rolling operations due to an increase in the number of operations.

Method used

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

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Experimental program
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Effect test

no. 1 approach

[0051] Hereinafter, the method for manufacturing an aluminum alloy thick plate and the aluminum alloy thick plate of the present invention will be described in detail with reference to the accompanying drawings. In addition, in the drawings referred to, figure 1 It is a figure which shows the flow of the manufacturing method of an aluminum alloy thick plate.

[0052] Such as figure 1As shown, the manufacturing method of an aluminum alloy thick plate (hereinafter, appropriately referred to as "thick plate") is carried out in sequence: a dissolution process (S1), a dehydrogenation process (S2), a filtration process (S3), a casting process (S4), Slicing process (S6). Also, if necessary, a heat treatment step (S5) may be included after the casting step (S4), and a surface smoothing step (S7) may be included after the slicing step (S6).

[0053] In this production method, first, the aluminum alloy which is a raw material is dissolved in a dissolution step (S1). Dissolving step ...

Embodiment 1

[0122] First, an aluminum alloy having a composition shown in Table 1 was dissolved, dehydrogenated, filtered, and then cast to manufacture an ingot with a plate thickness of 500 mm. The manufactured ingot was heated at 580° C. for 4 hours to perform homogenization heat treatment. This ingot was sliced ​​or hot-rolled to produce an aluminum alloy thick plate (sliced ​​material, hot-rolled material) with a thickness of 20 mm.

[0123] The following tests were performed on the sliced ​​material and the hot-rolled material.

[0124]

[0125] The flatness evaluation measured the amount of warping (flatness) per 1 m in the casting direction for the sliced ​​material, and measured the warping amount (flatness) per 1 m in the rolling direction for the hot-rolled material. Those whose flatness was 0.4 mm / 1 m length or less were judged to be acceptable (◯), and those whose flatness exceeded 0.4 mm / 1 m length were judged to be unacceptable (×).

[0126] Table 2 shows the results.

...

Embodiment 2

[0137] First, an aluminum alloy having a composition No. 2 shown in Table 1 (alloy component 2) was dissolved, dehydrogenated, filtered, and then cast to manufacture an ingot with a plate thickness of 500 mm. The produced ingots were subjected to homogenization heat treatment under the conditions shown in Table 3. This ingot was sliced ​​to produce an aluminum alloy thick plate (sliced ​​material) with a thickness of 20 mm.

[0138] The sliced ​​material was subjected to a flatness evaluation test.

[0139]

[0140] For flatness evaluation, the amount of warping per 1 m in the casting direction (flatness) was measured. Those with a flatness of 0.4mm / 1m or less are considered acceptable (○), and those with a flatness of 0.25mm / 1m or less are considered good ( ).

[0141] Table 3 shows the results.

[0142] [Table 1]

[0143]

[0144]

[0145] [table 3]

[0146]

[0147] As shown in Table 2, for the sliced ​​materials (alloy components 1 to 14), there was littl...

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Abstract

The present invention provides a method for manufacturing an aluminium alloy thick plate and an aluminium alloy thick plate with high productivity, good controllability of surface condition and flatness, and improved accuracy of plate thickness. In the method, a melting step (S1) for melting an aluminium alloy containing Mn in a predetermined amount, at least one of Si, Fe, Cu, Mg, Cr, Zn and Ti in an predetermined amount, and Al and inevitable impurities as the remainder, a hydrogen gas removal step (S2) for removing hydrogen gas from the aluminium alloy melted in the melting step (S1), a filtration step (S3) for removing mediators from the aluminium alloy from which hydrogen gas has been removed, a casting step (S4) for casting the aluminium alloy from which the mediators have been removed to produce a slab, and a slicing step (S6) for slicing the slab into a predetermined thickness are carried out in the order stated.

Description

technical field [0001] The invention relates to a method for manufacturing an aluminum alloy thick plate and the aluminum alloy thick plate. Background technique [0002] In general, aluminum alloy materials such as aluminum alloy thick plates are used in a variety of electrical and electronic parts and their manufacturing equipment, daily necessities, mechanical parts, etc., in addition to semiconductor-related devices such as bottom substrates, conveying equipment, and containers for vacuum equipment. used in the application. [0003] Such an aluminum alloy material is usually produced by dissolving and casting an aluminum alloy as a raw material, producing an ingot, homogenizing the ingot as necessary, and rolling the ingot to a predetermined thickness (for example, , refer to Patent Document 1). [0004] In addition, steel, cast steel, etc. are used in mass production as a mold material for a stamping mold, and zinc alloy cast materials, aluminum alloy cast materials, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B21/06B22D1/00C22B9/02C22B9/05C22C21/00C22C21/02C22C21/06C22F1/04C22F1/00
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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