JPS563603A - Production of superhard alloy case - Google Patents

Production of superhard alloy case

Info

Publication number
JPS563603A
JPS563603A JP7838979A JP7838979A JPS563603A JP S563603 A JPS563603 A JP S563603A JP 7838979 A JP7838979 A JP 7838979A JP 7838979 A JP7838979 A JP 7838979A JP S563603 A JPS563603 A JP S563603A
Authority
JP
Japan
Prior art keywords
superhard alloy
molding
powder
plastic
heated
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
JP7838979A
Other languages
Japanese (ja)
Inventor
Seizo Masuda
Takehiko Nakamura
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 Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP7838979A priority Critical patent/JPS563603A/en
Publication of JPS563603A publication Critical patent/JPS563603A/en
Pending legal-status Critical Current

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  • Powder Metallurgy (AREA)

Abstract

PURPOSE: To obtain the superhard alloy case of high density for portable watches by mixing the specific weight ratio of plastic powder as a molding accelerator into superhard alloy powder and molding the mixture, then heating the molding to let the plastic melt and evaporate thence sintering the same.
CONSTITUTION: Plastic powder is added as a green compact molding accelerator at 1W10wt% to the superhard alloy powder containing a binder at 0W40% based on weight. This is heated and compaction-molded in the metal dies having the shape close to that of the finished product with heating at ordinary temperatureW400°C. Thence, it is heated to 200W600°C to let the plastic melt and evaporate, after which this green compact molding is heated to the sintering temperature of the superhard alloy. This method causes the plastic powder to interpose finely among the superhard alloy powder, thereby binding and molding the superhard alloy more firmly. In addition, this permits are increase in the binder amount and readily yields the case which is fine and has the sharp and beautiful polished surface specific to superhard alloy.
COPYRIGHT: (C)1981,JPO&Japio
JP7838979A 1979-06-21 1979-06-21 Production of superhard alloy case Pending JPS563603A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7838979A JPS563603A (en) 1979-06-21 1979-06-21 Production of superhard alloy case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7838979A JPS563603A (en) 1979-06-21 1979-06-21 Production of superhard alloy case

Publications (1)

Publication Number Publication Date
JPS563603A true JPS563603A (en) 1981-01-14

Family

ID=13660655

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7838979A Pending JPS563603A (en) 1979-06-21 1979-06-21 Production of superhard alloy case

Country Status (1)

Country Link
JP (1) JPS563603A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816903A (en) * 1981-06-19 1983-01-31 ユニロ−ヤル・エングレベルト・ライフエン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング Pneumatic tire for car
CH680251GA3 (en) * 1990-10-10 1992-07-31

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816903A (en) * 1981-06-19 1983-01-31 ユニロ−ヤル・エングレベルト・ライフエン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング Pneumatic tire for car
JPH0579521B2 (en) * 1981-06-19 1993-11-02 Yuniroiyaru Anguruberuto Raifu
CH680251GA3 (en) * 1990-10-10 1992-07-31

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