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JPS5747853A - Manufacture of al alloy plate for magnetic disk - Google Patents

Manufacture of al alloy plate for magnetic disk

Info

Publication number
JPS5747853A
JPS5747853A JP12377580A JP12377580A JPS5747853A JP S5747853 A JPS5747853 A JP S5747853A JP 12377580 A JP12377580 A JP 12377580A JP 12377580 A JP12377580 A JP 12377580A JP S5747853 A JPS5747853 A JP S5747853A
Authority
JP
Japan
Prior art keywords
annealing
magnetic disk
semihard
manufacture
reduction ratio
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
JP12377580A
Other languages
Japanese (ja)
Other versions
JPS6056415B2 (en
Inventor
Kozo Hoshino
Yoshihiro Tsuji
Yoshinobu Kitao
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP55123775A priority Critical patent/JPS6056415B2/en
Publication of JPS5747853A publication Critical patent/JPS5747853A/en
Publication of JPS6056415B2 publication Critical patent/JPS6056415B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Heat Treatment Of Nonferrous Metals Or Alloys (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE: To obtain an excellent base plate for a magnetic disk having a refined crystal structure by soaking and hot-rolling an Al alloy ingot contg. a specified amount of Mg, Fe, Mn and Cr followed by cold rolling at a specified reduction ratio, process annealing, cold rolling to a prescribed thickness and final full annealing or semihard annealing.
CONSTITUTION: An Al ingot contg., by wt., 3W5% Mg as an essential component, ≤0.1% Si, ≤0.2% Fe, ≤0.4% Mn and ≤0.1% Cr is soaked, hot rolled, and cold rolled at ≥25% reduction ratio. It is subjected to process annealing at 300W500°C for 0.5W28hr and cold rolled to a prescribed thickness. Final full annealing or semihard (partial) annealing is then carried out to obtain a marcrostructure composed of fine stable recrystallized grains with no directional properties.
COPYRIGHT: (C)1982,JPO&Japio
JP55123775A 1980-09-05 1980-09-05 Manufacturing method of Al alloy plate for magnetic disk Expired JPS6056415B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55123775A JPS6056415B2 (en) 1980-09-05 1980-09-05 Manufacturing method of Al alloy plate for magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55123775A JPS6056415B2 (en) 1980-09-05 1980-09-05 Manufacturing method of Al alloy plate for magnetic disk

Publications (2)

Publication Number Publication Date
JPS5747853A true JPS5747853A (en) 1982-03-18
JPS6056415B2 JPS6056415B2 (en) 1985-12-10

Family

ID=14868967

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55123775A Expired JPS6056415B2 (en) 1980-09-05 1980-09-05 Manufacturing method of Al alloy plate for magnetic disk

Country Status (1)

Country Link
JP (1) JPS6056415B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60110852A (en) * 1983-11-21 1985-06-17 Mitsubishi Electric Corp Heat treatment of disk for magnetic disk
JPS63216953A (en) * 1987-03-05 1988-09-09 Sumitomo Light Metal Ind Ltd Production of al alloyed substrate for magnetic disk
JPH05315908A (en) * 1992-04-02 1993-11-26 Nec Corp Semiconductor delay circuit

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62277209A (en) * 1986-05-22 1987-12-02 Kobe Steel Ltd Machining method for nodal groove of roll
JPS62277210A (en) * 1986-05-23 1987-12-02 Kobe Steel Ltd Re-machining method for nodal groove of roll
JPS62277211A (en) * 1986-05-23 1987-12-02 Kobe Steel Ltd Machining method for roll caliber

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5495912A (en) * 1978-01-13 1979-07-28 Nippon Telegr & Teleph Corp <Ntt> Aluminum substrate for magnetic disc and manufacture thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5495912A (en) * 1978-01-13 1979-07-28 Nippon Telegr & Teleph Corp <Ntt> Aluminum substrate for magnetic disc and manufacture thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60110852A (en) * 1983-11-21 1985-06-17 Mitsubishi Electric Corp Heat treatment of disk for magnetic disk
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
JPH05315908A (en) * 1992-04-02 1993-11-26 Nec Corp Semiconductor delay circuit

Also Published As

Publication number Publication date
JPS6056415B2 (en) 1985-12-10

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