JPS5495912A - Aluminum substrate for magnetic disc and manufacture thereof - Google Patents

Aluminum substrate for magnetic disc and manufacture thereof

Info

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
Application number
JP247278A
Other languages
Japanese (ja)
Other versions
JPS5639699B2 (en
Inventor
Seiji Hattori
Hidenori Nakagawa
Wakatake Matsuda
Takehiko Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Aluminum Co Ltd
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Furukawa Aluminum Co Ltd
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Furukawa Aluminum Co Ltd, Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Furukawa Aluminum Co Ltd
Priority to JP247278A priority Critical patent/JPS5495912A/en
Publication of JPS5495912A publication Critical patent/JPS5495912A/en
Publication of JPS5639699B2 publication Critical patent/JPS5639699B2/ja
Granted legal-status Critical Current

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
JP247278A 1978-01-13 1978-01-13 Aluminum substrate for magnetic disc and manufacture thereof Granted JPS5495912A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (21)

* Cited by examiner, † Cited by third party
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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