JPS5495912A - Aluminum substrate for magnetic disc and manufacture thereof - Google Patents
Aluminum substrate for magnetic disc and manufacture thereofInfo
- Publication number
- JPS5495912A JPS5495912A JP247278A JP247278A JPS5495912A JP S5495912 A JPS5495912 A JP S5495912A JP 247278 A JP247278 A JP 247278A JP 247278 A JP247278 A JP 247278A JP S5495912 A JPS5495912 A JP S5495912A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- substrate
- magnetic discs
- manufacture
- impurities
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Laminated Bodies (AREA)
- Heat Treatment Of Nonferrous Metals Or Alloys (AREA)
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
PURPOSE: To manufacture an Al alloy substrate with a superior surface state for magnetic discs by removing intermetallic cpds. and non-metallic inclusions of larger diameter in an Al alloy, followed by casting and specific heat treatment.
CONSTITUTION: An Al alloy is melted contg. Mg; 3W6%, Mn<0.4% and Cr< 0.03%, and Fe<0.1%, Si<0.2% and Ti<0.02% as impurities. The molten alloy is passed through a below 10 μ mesh filter to remove coarse intermetallic cpds. and non-metallic inclusions in the alloy, followed by casting. The resulting ingot is heated at 400W480°C for 3W10 hr and further heated at 500W560°C for 3W48 hr to dissolve or disperse the added elements and impurities. The ingot is then rolled to a 2 mm thick sheet and annealed at 360°C for 4 hr to obtain a substrate for magnetic discs. The surface of the substrate is planed or buffed to give a lightweight Al alloy substrate with superior corrosion resistance, mechanical properties and no protrusion and recess on the surface for magnetic discs.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP247278A JPS5495912A (en) | 1978-01-13 | 1978-01-13 | Aluminum substrate for magnetic disc and manufacture thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP247278A JPS5495912A (en) | 1978-01-13 | 1978-01-13 | Aluminum substrate for magnetic disc and manufacture thereof |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6474285A Division JPS6176643A (en) | 1985-03-28 | 1985-03-28 | Aluminum substrate for magnetic disk |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5495912A true JPS5495912A (en) | 1979-07-28 |
JPS5639699B2 JPS5639699B2 (en) | 1981-09-16 |
Family
ID=11530252
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP247278A Granted JPS5495912A (en) | 1978-01-13 | 1978-01-13 | Aluminum substrate for magnetic disc and manufacture thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5495912A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5747853A (en) * | 1980-09-05 | 1982-03-18 | Kobe Steel Ltd | Manufacture of al alloy plate for magnetic disk |
JPS59157255A (en) * | 1983-02-25 | 1984-09-06 | Nippon Light Metal Co Ltd | Aluminum alloy material for superprecision working to form specular surface |
JPS59193538A (en) * | 1983-04-18 | 1984-11-02 | Mitsubishi Alum Co Ltd | Al alloy for substrate of magnetic disk |
JPS59193539A (en) * | 1983-04-18 | 1984-11-02 | Mitsubishi Alum Co Ltd | Al alloy for substrate of magnetic disk |
JPS60262936A (en) * | 1984-06-11 | 1985-12-26 | Kobe Steel Ltd | Extrusion aluminum alloy superior in vapor deposition characteristic of amorphous silicon |
JPS61139634A (en) * | 1984-12-12 | 1986-06-26 | Canon Inc | Aluminum alloy for precision working and tubular material and photo-conductive member made thereof |
JPS61159545A (en) * | 1984-12-29 | 1986-07-19 | Canon Inc | Aluminum alloy for precision working, and tubing and photo-conductive member by use of it |
JPS61199046A (en) * | 1985-02-28 | 1986-09-03 | Showa Alum Corp | Aluminum alloy material for photosensitive drum of electrophotographic copying machine |
JPS63216953A (en) * | 1987-03-05 | 1988-09-09 | Sumitomo Light Metal Ind Ltd | Production of al alloyed substrate for magnetic disk |
JPS63257917A (en) * | 1987-04-15 | 1988-10-25 | Kobe Steel Ltd | Production of al substrate for magnetic disk |
JPH0372051A (en) * | 1989-08-11 | 1991-03-27 | Kobe Steel Ltd | Al-mg alloy for mirror-like finishing and its manufacture |
JPH03100146A (en) * | 1989-09-13 | 1991-04-25 | Kobe Steel Ltd | Production of high capacitance-aluminum disk |
JP2020087485A (en) * | 2018-11-15 | 2020-06-04 | 株式会社神戸製鋼所 | Aluminum alloy board for magnetic disk, aluminum alloy blank for magnetic disk and aluminum alloy substrate for magnetic disk |
-
1978
- 1978-01-13 JP JP247278A patent/JPS5495912A/en active Granted
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6056415B2 (en) * | 1980-09-05 | 1985-12-10 | 株式会社神戸製鋼所 | Manufacturing method of Al alloy plate for magnetic disk |
JPS5747853A (en) * | 1980-09-05 | 1982-03-18 | Kobe Steel Ltd | Manufacture of al alloy plate for magnetic disk |
JPS6232260B2 (en) * | 1983-02-25 | 1987-07-14 | Nippon Light Metal Co | |
JPS59157255A (en) * | 1983-02-25 | 1984-09-06 | Nippon Light Metal Co Ltd | Aluminum alloy material for superprecision working to form specular surface |
JPS59193538A (en) * | 1983-04-18 | 1984-11-02 | Mitsubishi Alum Co Ltd | Al alloy for substrate of magnetic disk |
JPS59193539A (en) * | 1983-04-18 | 1984-11-02 | Mitsubishi Alum Co Ltd | Al alloy for substrate of magnetic disk |
JPH0316689B2 (en) * | 1983-04-18 | 1991-03-06 | Mitsubishi Aluminium | |
JPH0315259B2 (en) * | 1983-04-18 | 1991-02-28 | Mitsubishi Aluminium | |
JPS60262936A (en) * | 1984-06-11 | 1985-12-26 | Kobe Steel Ltd | Extrusion aluminum alloy superior in vapor deposition characteristic of amorphous silicon |
JPS6232261B2 (en) * | 1984-06-11 | 1987-07-14 | Kobe Steel Ltd | |
JPS61139634A (en) * | 1984-12-12 | 1986-06-26 | Canon Inc | Aluminum alloy for precision working and tubular material and photo-conductive member made thereof |
JPS61159545A (en) * | 1984-12-29 | 1986-07-19 | Canon Inc | Aluminum alloy for precision working, and tubing and photo-conductive member by use of it |
JPH0428773B2 (en) * | 1984-12-29 | 1992-05-15 | Canon Kk | |
JPS61199046A (en) * | 1985-02-28 | 1986-09-03 | Showa Alum Corp | Aluminum alloy material for photosensitive drum of electrophotographic copying machine |
JPS6331536B2 (en) * | 1985-02-28 | 1988-06-24 | Showa Aluminium Co Ltd | |
JPS63216953A (en) * | 1987-03-05 | 1988-09-09 | Sumitomo Light Metal Ind Ltd | Production of al alloyed substrate for magnetic disk |
JPH0364596B2 (en) * | 1987-03-05 | 1991-10-07 | Sumitomo Light Metal Ind | |
JPS63257917A (en) * | 1987-04-15 | 1988-10-25 | Kobe Steel Ltd | Production of al substrate for magnetic disk |
JPH0372051A (en) * | 1989-08-11 | 1991-03-27 | Kobe Steel Ltd | Al-mg alloy for mirror-like finishing and its manufacture |
JPH03100146A (en) * | 1989-09-13 | 1991-04-25 | Kobe Steel Ltd | Production of high capacitance-aluminum disk |
JP2020087485A (en) * | 2018-11-15 | 2020-06-04 | 株式会社神戸製鋼所 | Aluminum alloy board for magnetic disk, aluminum alloy blank for magnetic disk and aluminum alloy substrate for magnetic disk |
Also Published As
Publication number | Publication date |
---|---|
JPS5639699B2 (en) | 1981-09-16 |
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