Global Patent Index - EP 0798395 B1

EP 0798395 B1 2000-07-12 - Heat insulating alloy steel and die casting machine parts

Title (en)

Heat insulating alloy steel and die casting machine parts

Title (de)

Wärmeisolierender legierter Stahl und Teile für eine Druckgiessmaschine

Title (fr)

Acier allié et isolante thermique, et pièces pour un dispositif de couler sous pression

Publication

EP 0798395 B1 (EN)

Application

EP 97302103 A

Priority

  • JP 7388396 A
  • JP 7388496 A

Abstract (en)

[origin: EP0798395A2] A heat insulating alloy steel contains 0.1 to 5.0 wt.% of C, 3.0 to 7.0 wt.% of Si, 5.0 to 18 wt.% of Ni, 0.5 to 8.0 wt.% of Cr, optionally at least one of less than 2.0 wt.% or less of Mn, 2.0 wt.% or less of Al and 2.0 wt.% of Mo, and the balance essentially of Fe. This heat insulating steel has a matrix metal structure with 30 % or more area ratio of a martensite phase. Further, a die casting machine part such as an injection sleeve or a pouring port bushing, having a surface making contact with an Al based molten metal, is made of a Fe base alloy containing 0.1 to 1.5 wt.% of C, 5.0 to 40 wt.% of Ni and 0.5 to 10 wt.% of at least one carbide forming element from: Cr, Mo, W, V, Nb, Ta, Ti and Zr. Such machine part comprises a surface layer portion including the surface making contact with the Al basedmolten metal, formed therein with a high density carbide layer as a dissolution resistance barrier. <IMAGE>

IPC 1-7 (main, further and additional classification)

C22C 38/34; B22D 17/22

IPC 8 full level (invention and additional information)

B22D 17/20 (2006.01); B22D 17/22 (2006.01); C22C 38/40 (2006.01)

CPC (invention and additional information)

C22C 38/40 (2013.01); B22D 17/2023 (2013.01); B22D 17/203 (2013.01); B22D 17/2209 (2013.01)

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

EP 0798395 A2 19971001; EP 0798395 A3 19971203; EP 0798395 B1 20000712; DE 69702468 D1 20000817; DE 69702468 T2 20010308

INPADOC legal status


2017-05-31 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Free text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

- Effective date: 20170325

2017-04-19 [REG GB PE20] PATENT EXPIRED AFTER TERMINATION OF 20 YEARS

- Expiry date: 20170325

2017-03-26 [REG DE R071] EXPIRY OF RIGHT

- Document: DE 69702468

2016-08-31 [PGFP IT] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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2016-04-29 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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2016-02-08 [REG FR PLFP] FEE PAYMENT

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2002-01-01 [REG GB IF02] EUROPEAN PATENT IN FORCE AS OF 2002-01-01

2001-06-27 [26N] NO OPPOSITION FILED

2000-10-03 [ITF] IT: TRANSLATION FOR A EP PATENT FILED

- Owner name: BIANCHETTI - BRACCO - MINOJA S.R.L.

2000-08-18 [ET] FR: TRANSLATION FILED

2000-08-17 [REF] CORRESPONDS TO:

- Document: DE 69702468 20000817

2000-07-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB IT

1998-07-08 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19980522

1997-12-03 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): DE FR GB IT

1997-10-01 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19970423

1997-10-01 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): DE FR GB IT