EP0144846A3 - Sintered moulded part for contact pieces of vacuum interrupters and method for their fabrication - Google Patents

Sintered moulded part for contact pieces of vacuum interrupters and method for their fabrication Download PDF

Info

Publication number
EP0144846A3
EP0144846A3 EP84113919A EP84113919A EP0144846A3 EP 0144846 A3 EP0144846 A3 EP 0144846A3 EP 84113919 A EP84113919 A EP 84113919A EP 84113919 A EP84113919 A EP 84113919A EP 0144846 A3 EP0144846 A3 EP 0144846A3
Authority
EP
European Patent Office
Prior art keywords
impregnation
temperature
matrix
impregnation material
sintering
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
EP84113919A
Other languages
German (de)
Other versions
EP0144846B1 (en
EP0144846A2 (en
Inventor
Ilgmar Dr.-Ing. Kalning
Hans-Peter Dipl.-Ing. Bahder
Bernd Dipl.-Ing. Deja
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.)
VEB "OTTO BUCHWITZ" STARKSTROM-ANLAGENBAU DRESDEN
Original Assignee
VEB "OTTO BUCHWITZ" STARKSTROM-ANLAGENBAU DRESDEN
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 VEB "OTTO BUCHWITZ" STARKSTROM-ANLAGENBAU DRESDEN filed Critical VEB "OTTO BUCHWITZ" STARKSTROM-ANLAGENBAU DRESDEN
Priority to AT84113919T priority Critical patent/ATE34873T1/en
Publication of EP0144846A2 publication Critical patent/EP0144846A2/en
Publication of EP0144846A3 publication Critical patent/EP0144846A3/en
Application granted granted Critical
Publication of EP0144846B1 publication Critical patent/EP0144846B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches
    • H01H1/0206—Contacts characterised by the material thereof specially adapted for vacuum switches containing as major components Cu and Cr

Landscapes

  • Powder Metallurgy (AREA)
  • Manufacture Of Switches (AREA)

Abstract

1. A method of marking sintered parts for vacuum switch contacts, in which the sintered material is initially fabricated from a high-melting point metal powder constituting the matrix by mixing, pressing to obtain a moulded body, and sintering, and subsequent impregnation of the matrix with an impregnation material having a lower melting point, characterized by the following method steps : (a) use of a powder for pressing comprising a powder mix of - the total amount of the powdery high-melting-point matrix material, - a portion of the impregnation material in an amount of from 30 to 70 wt.%, based on the total amount of the impregnation material and - an addition material which at the sintering temperature forms a eutectic with the impregnation material and reacts metallurgically with the matrix material to form a coherent surface layer which surrounds the matrix material, and which upon thermal treatment is precipitated in dispersed form from the impregnation material, in an amount of from 1 to 5 wt.%, based on the mass of the total contact ; (b) applying the residual amount of the impregnation material as a coating onto the previously pressed moulded part ; (c) sintering at a temperature which is below the fusion temperature of the impregnation material but at least at the temperature of the eutectic which is formed from the impregnation material and the addition material, and maintaining said temperature for at least 1 h ; (d) performing the impregnation at or above the melting temperature of the impregnation material for a period of at least 30 min and (e) thermally treating the moulded part at a temperature which is below the sintering temperature by 100 to 250 k, during a treatment period of > 1 h.
EP84113919A 1983-12-12 1984-11-16 Sintered moulded part for contact pieces of vacuum interrupters and method for their fabrication Expired EP0144846B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84113919T ATE34873T1 (en) 1983-12-12 1984-11-16 SINTERED BODIES FOR VACUUM SWITCH CONTACT PIECES AND PROCESS FOR THEIR MANUFACTURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD83257796A DD219619A1 (en) 1983-12-12 1983-12-12 PROCESS FOR PRODUCING SINTERED MATERIALS FOR VACUUM SWITCH CONTACT PANEL
DD257796 1983-12-12

Publications (3)

Publication Number Publication Date
EP0144846A2 EP0144846A2 (en) 1985-06-19
EP0144846A3 true EP0144846A3 (en) 1986-01-02
EP0144846B1 EP0144846B1 (en) 1988-06-01

Family

ID=5552815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113919A Expired EP0144846B1 (en) 1983-12-12 1984-11-16 Sintered moulded part for contact pieces of vacuum interrupters and method for their fabrication

Country Status (5)

Country Link
EP (1) EP0144846B1 (en)
JP (1) JPS60149702A (en)
AT (1) ATE34873T1 (en)
DD (1) DD219619A1 (en)
DE (1) DE3471806D1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4699763A (en) * 1986-06-25 1987-10-13 Westinghouse Electric Corp. Circuit breaker contact containing silver and graphite fibers
JP2632886B2 (en) * 1987-12-22 1997-07-23 川崎製鉄株式会社 Manufacturing method of multi-phase structure sintered body
DE19537657A1 (en) * 1995-10-10 1997-04-17 Abb Patent Gmbh Method and device for producing a contact piece
DE19933111A1 (en) * 1999-07-15 2001-01-18 Abb Patent Gmbh Vacuum chamber for low power switching, has sintered structure applied to inner surface of cylinder lid to form fixed contact
DE19960876A1 (en) * 1999-12-17 2001-06-21 Abb Patent Gmbh Method for producing a contact piece blank and a contact piece, as well as a contact piece blank, a contact piece and a contact piece arrangement for axial magnetic field applications in a vacuum chamber
DE10010723B4 (en) * 2000-03-04 2005-04-07 Metalor Technologies International Sa Method for producing a contact material semifinished product for contact pieces for vacuum switching devices and contact material semi-finished products and contact pieces for vacuum switching devices

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2310317A1 (en) * 1973-03-01 1974-09-05 Siemens Ag Copper alloy contact for vacuum reed relay - contg. boron, zirconium, lanthanium, cerium or chromium for higher strength
DE2521504A1 (en) * 1974-05-23 1975-12-04 English Electric Co Ltd PROCESS FOR PRODUCING AN ELECTRODE FOR VACUUM SWITCH OR VACUUM SPARK GANG
DE2522832A1 (en) * 1974-06-03 1975-12-18 Westinghouse Electric Corp PROCESS FOR PRODUCING CHROME-COPPER CONTACTS FOR VACUUM SWITCHES AND CONTACTS PRODUCED BY THIS PROCESS
DE2914186A1 (en) * 1978-04-13 1979-10-31 Westinghouse Electric Corp PROCESS FOR PRODUCING ELECTRICAL CONTACTS FOR VACUUM DISCONNECTORS

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2310317A1 (en) * 1973-03-01 1974-09-05 Siemens Ag Copper alloy contact for vacuum reed relay - contg. boron, zirconium, lanthanium, cerium or chromium for higher strength
DE2521504A1 (en) * 1974-05-23 1975-12-04 English Electric Co Ltd PROCESS FOR PRODUCING AN ELECTRODE FOR VACUUM SWITCH OR VACUUM SPARK GANG
DE2522832A1 (en) * 1974-06-03 1975-12-18 Westinghouse Electric Corp PROCESS FOR PRODUCING CHROME-COPPER CONTACTS FOR VACUUM SWITCHES AND CONTACTS PRODUCED BY THIS PROCESS
DE2914186A1 (en) * 1978-04-13 1979-10-31 Westinghouse Electric Corp PROCESS FOR PRODUCING ELECTRICAL CONTACTS FOR VACUUM DISCONNECTORS

Also Published As

Publication number Publication date
JPS60149702A (en) 1985-08-07
DE3471806D1 (en) 1988-07-07
ATE34873T1 (en) 1988-06-15
EP0144846B1 (en) 1988-06-01
DD219619A1 (en) 1985-03-06
EP0144846A2 (en) 1985-06-19

Similar Documents

Publication Publication Date Title
DE3169727D1 (en) Base material for firing in order to prepare an intermediate layer between a high melting dental alloy and a tooth porcelain
DK559789D0 (en) PROCEDURE FOR MANUFACTURING MACROCOMPOSITE PRODUCTS
GB1100164A (en) Method for making refractory metal contacts having integral welding surfaces thereon
DE3471806D1 (en) Sintered moulded part for contact pieces of vacuum interrupters and method for their fabrication
DK558789A (en) METHOD OF MANUFACTURING METAL MATRIX COMPOSITION PRODUCTS
DK559689D0 (en) METHOD OF MANUFACTURING METAL MATRIX COMPOSITION PRODUCTS
ZA905589B (en) Forming macrocomposite bodies by self-generated vacuum techniques
US4293356A (en) Method for adhesion of ceramics
EP0140344A3 (en) Paste vehicle for fusible powdered metal paste
JPS552741A (en) Method for forming powder and granule layer of aluminum or its alloy on metal plate
EP0146207A3 (en) Improvements in electrical components
JPS56116804A (en) Method of bonding sintered body to metal member
SE8601323D0 (en) PUT TO POWDER METAL SURGICAL MAKE A FORM
JPS5776141A (en) Electric contact meterial
JPS56127702A (en) Production of composite electric contact material
Toda et al. Wetting properties of W by molten SiO sub (2)-MgO-Al sub (2) O sub (3) ternary eutectic composition.
Mackay Composition for three-dimensional metal fabrication using a laser
JPH0597464A (en) Method for molding glass
JPS55130367A (en) Production of noble metal small ball
JPS53146975A (en) Forming method for sublimable material
JPS6419624A (en) Manufacture of superconductor of ceramic type superconductive material
JPS5687641A (en) Manufacture of silver-tin oxide electrical contact
JPS55128555A (en) Electric contact-point material and producing the same
Potapov et al. The Life of Needles in Forming Pipes From Molybdenum
JPS53146903A (en) Preparation of wear-resisting sintered alloy of iron base

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT CH DE FR GB LI NL SE

17P Request for examination filed

Effective date: 19851114

17Q First examination report despatched

Effective date: 19860814

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB LI NL SE

REF Corresponds to:

Ref document number: 34873

Country of ref document: AT

Date of ref document: 19880615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3471806

Country of ref document: DE

Date of ref document: 19880707

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19891019

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19891027

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19891115

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19891129

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19891130

Year of fee payment: 6

Ref country code: GB

Payment date: 19891130

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19891218

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19901116

Ref country code: AT

Effective date: 19901116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19901117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19901130

Ref country code: CH

Effective date: 19901130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19910601

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19910731

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19910801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 84113919.9

Effective date: 19910705