JPS6486502A - Manufacture of permanent magnet - Google Patents

Manufacture of permanent magnet

Info

Publication number
JPS6486502A
JPS6486502A JP63196826A JP19682688A JPS6486502A JP S6486502 A JPS6486502 A JP S6486502A JP 63196826 A JP63196826 A JP 63196826A JP 19682688 A JP19682688 A JP 19682688A JP S6486502 A JPS6486502 A JP S6486502A
Authority
JP
Japan
Prior art keywords
alloy
bath temperature
columnar crystals
mold
melting point
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.)
Pending
Application number
JP63196826A
Other languages
Japanese (ja)
Inventor
Itaru Okonogi
Tatsuya Shimoda
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson 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
Priority claimed from JP17798280A external-priority patent/JPS5699174A/en
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP63196826A priority Critical patent/JPS6486502A/en
Publication of JPS6486502A publication Critical patent/JPS6486502A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To enable performance excellent in saturation magnetization, coercive force or the rectangular properties of a hysteresis loop by casting an alloy into a mold at a bath temperature sufficiently higher than the melting point of the alloy and bringing the specific volume ratio or more of the macrostructure of a cast ingot to a columnar crystal. CONSTITUTION:An alloy is casted into a mold at a bath temperature sufficiently higher than the melting point of the alloy, and 50vol.% or more of the macrostructure of a cast ingot is brought to columnar crystals. The bath temperature at the time of casting is elevated as much as possible, and the quantity of coagulation nuclei generated at a time when the alloy is casted into the mold is reduced, thus increasing the rate of the columnar crystals. It is desirable that the molten alloy is changed into the columnar crystals at a volume ratio of 50% or more by raising the bath temperature to the melting point of the molten alloy +320 deg.C or more. It is more preferable that it is turned into the columnar crystals at the volume ratio of 70% or more.
JP63196826A 1980-12-16 1988-08-05 Manufacture of permanent magnet Pending JPS6486502A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63196826A JPS6486502A (en) 1980-12-16 1988-08-05 Manufacture of permanent magnet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP17798280A JPS5699174A (en) 1979-12-17 1980-12-16 Joining device for thermoplastic thread or tape
JP63196826A JPS6486502A (en) 1980-12-16 1988-08-05 Manufacture of permanent magnet

Publications (1)

Publication Number Publication Date
JPS6486502A true JPS6486502A (en) 1989-03-31

Family

ID=26498322

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63196826A Pending JPS6486502A (en) 1980-12-16 1988-08-05 Manufacture of permanent magnet

Country Status (1)

Country Link
JP (1) JPS6486502A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57100705A (en) * 1980-12-16 1982-06-23 Seiko Epson Corp Permanent magnet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57100705A (en) * 1980-12-16 1982-06-23 Seiko Epson Corp Permanent magnet

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