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Aluminum alloy substrate for magnetic disk, manufacturing method thereof, and magnetic disk using the aluminum alloy substrate for magnetic disk

The technology of an aluminum alloy substrate and manufacturing method, which is applied in the direction of disc carrier manufacturing, magnetic recording, magnetic recording layer, etc., can solve the problems of unobtainable, increased component cost, and different flutter suppression effect, and achieve the effect of excellent flutter characteristics

Active Publication Date: 2021-08-10
UACJ CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, in the method disclosed in Patent Document 1, the flutter suppression effect differs due to the difference in the distance between the installed air spoiler and the magnetic disk substrate, and the high precision of the parts is required, which leads to an increase in the cost of the parts.
[0011] In addition, although the method of adding a large amount of Mg to the aluminum alloy plate shown in Patent Document 2 is effective for improving the strength, the current situation is that the disc chatter is prone to occur, and the targeted small disc chatter characteristics have not been obtained.

Method used

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  • Aluminum alloy substrate for magnetic disk, manufacturing method thereof, and magnetic disk using the aluminum alloy substrate for magnetic disk
  • Aluminum alloy substrate for magnetic disk, manufacturing method thereof, and magnetic disk using the aluminum alloy substrate for magnetic disk
  • Aluminum alloy substrate for magnetic disk, manufacturing method thereof, and magnetic disk using the aluminum alloy substrate for magnetic disk

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preparation example Construction

[0085] 6. Preparation and casting of aluminum alloy ingredients

[0086] First, according to the conventional method, the melt having the aluminum alloy material composed of the above components is prepared (step S101). Next, a sheet of an aluminum alloy of about 2.0 to 10.0 mm is cast by a continuous casting method (CC method), the melt of the prepared aluminum alloy material is cast (step S102).

[0087] Here, in the CC method, the melt is supplied to a pair of rollers (or, the beloft cast machine, the Belt Caster), and the block coaster (BLOCK CASTER). The heat is cast directly into the foundation plate of aluminum alloy.

[0088] In the casting of the thin plate of the aluminum alloy using the CC method, the temperature of the cast plate after 1 minute after 1 minute was set to 230 to 350 ° C, preferably 240 to 340 ° C. Further, after 10 minutes of casting, the temperature of the cast plate was set to 150 ° C or more and less than 230 ° C, preferably 160 to 220 ° C. In this wa...

Embodiment

[0100] Next, the present invention will be further described in detail based on the embodiment, but the present invention is not limited thereto.

[0101] Each of the alloy materials consisting of the components shown in Tables 1 to T T3 3 is melted according to conventional methods, and the aluminum alloy melt (step S101) is melted. Tables 1 to 3 "-" indicates the measurement of the threshold.

[0102] [Table 1]

[0103]

[0104] [Table 2]

[0105]

[0106] [table 3]

[0107]

[0108] Next, the aluminum alloy melt is cast by CC method, and the foundation plate is produced (step S102). In Tables 4 to 6, the thickness of the foundry plate is shown, and the cast plate temperature after the casting after 1 minute is obtained, and the temperature of the cast plate after 10 minutes after casting. Further, a homogenization process is performed for alloys No. A8 to A10 and the AC8 to AC12 (step S103). These homogenization treatment conditions are also shown in Tables 4 to 6.

[010...

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Abstract

An aluminum alloy substrate for a magnetic disk, a manufacturing method thereof, and a magnetic disk using the aluminum alloy substrate for a magnetic disk, the aluminum alloy substrate for a magnetic disk is characterized in that it contains Fe: 0.4 to 3.0 mass%, and the remainder consists of Al and unavoidable Aluminum alloy composed of impurities, the second phase particles with the longest diameter of 0.5 μm or more and less than 2.0 μm at 5000 particles / mm 2 The above distribution density is dispersed.

Description

Technical field [0001] The present invention relates to an aluminum alloy substrate for a high-strength and a Fluttering characteristic, a method of manufacturing the same, and a disk having an aluminum alloy substrate for the disk. Background technique [0002] Disks used for storage devices for computers use good plating properties and substrates excellent in mechanical properties and workability. For example, from JIS5086 (containing Mg: 3.5 ~ 4.5mas, Fe: 0.50mass% or less, Si: 0.40mass% or less, MN: 0.20 ~ 0.70mass%, Cr: 0.05 ~ 0.25mass%, Cu: 0.10mAss% Hereinafter, Ti: 0.15 mAss% or less, and Zn: 0.25 mAss% or less, the remainder is made of the substrate based on Al and inevitable impurities) aluminum alloy. [0003] The manufacturing of the general disk is carried out by: First, a circular cyclic aluminum alloy substrate is fabricated, and plating, the aluminum alloy substrate is plated, and then the magnetic body is attached to the surface of the aluminum alloy substrate. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/73G11B5/84C22C21/00C22F1/00C22F1/04
CPCC22C21/00C22F1/00C22F1/04G11B5/73913G11B5/73919C22F1/057C22C21/12C22C21/06C22F1/047C22C21/10C22F1/053
Inventor 北脇高太郎村田拓哉米光诚松居悠藤井康生坂本辽中山贤熊谷航
Owner UACJ CORP
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