(19) |
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(11) |
EP 1 548 153 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
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24.01.2007 Bulletin 2007/04 |
(43) |
Date of publication A2: |
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29.06.2005 Bulletin 2005/26 |
(22) |
Date of filing: 23.12.2004 |
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(51) |
International Patent Classification (IPC):
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(84) |
Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI
SK TR |
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Designated Extension States: |
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AL BA HR LV MK YU |
(30) |
Priority: |
24.12.2003 IT RM20030602
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Applicant: CENTRO SVILUPPO MATERIALI S.p.A. |
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00129 Roma (IT) |
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(72) |
Inventors: |
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- Casadei, Fabrizio
Centro Sviluppo Materiali Spa
00129 Roma (IT)
- Testani, Claudio
Centro Sviluppo Materiali Spa
00129 Roma (IT)
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(74) |
Representative: Gervasi, Gemma et al |
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NOTARBARTOLO & GERVASI Srl,
Corso di Porta Vittoria, 9 20122 Milano 20122 Milano (IT) |
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(54) |
Process for producing multilayer coating with high abrasion resistance |
(57) Procedure to obtain multilayer coatings with high wear resistance, in particular
for light alloy metal materials and for metal matrix composite materials, wherein
the material to be coated is subjected to the following operations: a) surface deposition,
using thermal spray techniques, of a first cermet coating, with thickness ranging
from 20 to 600 µm; b) surface finishing treatment; c) deposition on the first coating,
using vapour phase deposition techniques, of a second nitride or carbon coating, with
thickness ranging from 1 to 10 µm.