JPS556425A - External part for portable watch - Google Patents

External part for portable watch

Info

Publication number
JPS556425A
JPS556425A JP7717378A JP7717378A JPS556425A JP S556425 A JPS556425 A JP S556425A JP 7717378 A JP7717378 A JP 7717378A JP 7717378 A JP7717378 A JP 7717378A JP S556425 A JPS556425 A JP S556425A
Authority
JP
Japan
Prior art keywords
resistance
metals
superior
external part
alloys
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
JP7717378A
Other languages
Japanese (ja)
Inventor
Tetsuo Nakagawa
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
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP7717378A priority Critical patent/JPS556425A/en
Publication of JPS556425A publication Critical patent/JPS556425A/en
Pending legal-status Critical Current

Links

Landscapes

  • Chemical Vapour Deposition (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

PURPOSE: The external part for portable watches which is obtainable by forming the boride layer of the specific metal on the surface of the molding of the specific metal and is superior in not only corrosion resistance, abrasion resistance and scratch resistance but in impact resistance and design freedom as well.
CONSTITUTION: A case for portable watches is made by metals such as Ti, Nb, Ta, Hf, V, W, Mo, Zr, Cr, etc. or their alloys. Or the case is made of austenite base stainless steel, brass, German silver, etc. and the film of the metals such as of the abovementioned Ti, etc. or their alloys is formed on the surface thereof by plating, etc. Next, the covering of the boride of said metals is formed by an ion plating method,activated reactive vapor deposition method or sputtering method. Since it is not a sintered body, it is superior in impact resistance, permits fabrication to shapes of a variety of designs and has the superior decorative tone intrinsic to borides, corrosion resistance, abrasion resistance and scratch resistance.
COPYRIGHT: (C)1980,JPO&Japio
JP7717378A 1978-06-26 1978-06-26 External part for portable watch Pending JPS556425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7717378A JPS556425A (en) 1978-06-26 1978-06-26 External part for portable watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7717378A JPS556425A (en) 1978-06-26 1978-06-26 External part for portable watch

Publications (1)

Publication Number Publication Date
JPS556425A true JPS556425A (en) 1980-01-17

Family

ID=13626395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7717378A Pending JPS556425A (en) 1978-06-26 1978-06-26 External part for portable watch

Country Status (1)

Country Link
JP (1) JPS556425A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6227578A (en) * 1985-07-26 1987-02-05 Takeo Oki Treated article of ti material having boron compound layer and its production
US4737252A (en) * 1981-05-18 1988-04-12 Westinghouse Electric Corp. Method of coating a metallic article of merchandise with a protective transparent film of abrasion-resistance material
US7396595B2 (en) * 2001-09-19 2008-07-08 Citizen Holdings Co., Ltd. Soft metal and method for preparation thereof, and exterior part of watch and method for preparation thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4737252A (en) * 1981-05-18 1988-04-12 Westinghouse Electric Corp. Method of coating a metallic article of merchandise with a protective transparent film of abrasion-resistance material
JPS6227578A (en) * 1985-07-26 1987-02-05 Takeo Oki Treated article of ti material having boron compound layer and its production
JPH0351796B2 (en) * 1985-07-26 1991-08-07 Takeo Oki
US7396595B2 (en) * 2001-09-19 2008-07-08 Citizen Holdings Co., Ltd. Soft metal and method for preparation thereof, and exterior part of watch and method for preparation thereof

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