ATE241711T1 - METHOD FOR DIRECT PROTECTION AGAINST WEAR CORROSION OF METAL OBJECTS - Google Patents

METHOD FOR DIRECT PROTECTION AGAINST WEAR CORROSION OF METAL OBJECTS

Info

Publication number
ATE241711T1
ATE241711T1 AT98203391T AT98203391T ATE241711T1 AT E241711 T1 ATE241711 T1 AT E241711T1 AT 98203391 T AT98203391 T AT 98203391T AT 98203391 T AT98203391 T AT 98203391T AT E241711 T1 ATE241711 T1 AT E241711T1
Authority
AT
Austria
Prior art keywords
nitrogen
steel
protection against
depending
direct protection
Prior art date
Application number
AT98203391T
Other languages
German (de)
Inventor
Pietro Cerutti
Original Assignee
Material Service Holding S A
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 Material Service Holding S A filed Critical Material Service Holding S A
Application granted granted Critical
Publication of ATE241711T1 publication Critical patent/ATE241711T1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/34—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Compounds Of Iron (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

In a process suitable to give a direct protection against the corrosion of metallic pieces, a nitrogen diffusion area is realised on the outer layer with a maximum depth of 0.1 mm, and with a nitrogen weight % lower than 2-4%, depending on the steel to he treated. The nitrogen is diffused into the piece and fills the imperfections and the empty areas of the crystal lattice. The temperature at which this first phase takes place goes from 480 to 525 DEG C depending from the steel type and the maximum duration is of 10 hours. Then, both the temperature values and the gas mixture, by introducing an oxidising atmosphere, are changed and the nitrogen diffusion is fully stopped by the oxygen action of the oxidising atmosphere against the iron atoms of the surface. Layers of Fe3O4 at 95-99% content are obtained, practically FeO/Fe2O3 oxides free, which are formed at temperatures comprised between 505 and 545 DEG C and which are comprised between 2 and 4 mu m and containing an oxygen weight % between 25% and 30%. A strong barrier and insulation effect is thereby obtained directly within the steel.
AT98203391T 1998-01-26 1998-10-09 METHOD FOR DIRECT PROTECTION AGAINST WEAR CORROSION OF METAL OBJECTS ATE241711T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT98MI000131A IT1298200B1 (en) 1998-01-26 1998-01-26 PROCEDURE TO PROVIDE DIRECT PROTECTION AGAINST WEAR CORROSION TO METAL PIECES

Publications (1)

Publication Number Publication Date
ATE241711T1 true ATE241711T1 (en) 2003-06-15

Family

ID=11378697

Family Applications (1)

Application Number Title Priority Date Filing Date
AT98203391T ATE241711T1 (en) 1998-01-26 1998-10-09 METHOD FOR DIRECT PROTECTION AGAINST WEAR CORROSION OF METAL OBJECTS

Country Status (5)

Country Link
EP (1) EP0931849B1 (en)
AT (1) ATE241711T1 (en)
DE (1) DE69815051T2 (en)
ES (1) ES2201405T3 (en)
IT (1) IT1298200B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003129213A (en) * 2001-10-16 2003-05-08 Honda Motor Co Ltd Production method for nitrided steel
DE102011078171A1 (en) 2011-06-28 2013-01-03 Robert Bosch Gmbh Method for applying a corrosion-resistant and wear-resistant layer on a metal part
WO2013150855A1 (en) * 2012-04-03 2013-10-10 日立金属工具鋼株式会社 Member for die casting and process for manufacturing same, sleeve for die casting, and die casting equipment
DE102014210571A1 (en) * 2014-06-04 2015-12-17 Robert Bosch Gmbh Component element of an assembly and manufacturing method thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2343418A (en) * 1941-01-02 1944-03-07 Aviat Corp Method of making propeller blades
JPS5658963A (en) * 1979-10-20 1981-05-22 Kiyoichi Ogawa Method and device for nitrified-layer stabilizing vapor coating processing
US4496401A (en) * 1981-10-15 1985-01-29 Lucas Industries Corrosion resistant steel components and method of manufacture thereof
GB2208658B (en) * 1987-07-17 1992-02-19 Lucas Ind Plc Manufacture of corrosion resistant steel components
JPS6479362A (en) * 1987-09-22 1989-03-24 Isuzu Motors Ltd Method and device for surface hardening
CA2016843A1 (en) * 1990-05-15 1991-11-15 Michel J. Korwin Thermochemical treatment of machinery components for improved corrosion resistance
JP3142689B2 (en) * 1993-06-29 2001-03-07 株式会社神戸製鋼所 Spring with excellent fatigue strength

Also Published As

Publication number Publication date
EP0931849A3 (en) 2000-08-02
IT1298200B1 (en) 1999-12-20
EP0931849B1 (en) 2003-05-28
ES2201405T3 (en) 2004-03-16
EP0931849A2 (en) 1999-07-28
ITMI980131A1 (en) 1999-07-26
DE69815051D1 (en) 2003-07-03
DE69815051T2 (en) 2004-04-08

Similar Documents

Publication Publication Date Title
Campos et al. Evaluation of boron mobility on the phases FeB, Fe2B and diffusion zone in AISI 1045 and M2 steels
CN105531389B (en) Aesthetic appearance and the excellent hot-dip galvanizing sheet steel of coating adaptation and alloyed hot-dip galvanized steel sheet and their manufacture method
PL1805341T3 (en) Hot-dip coating method in a zinc bath for strips of iron/carbon/manganese steel
ATE34412T1 (en) METHOD OF MONITORING THE ZINC FUMES FROM THE INLET DURING HOT GALVANIZING A STEEL STRIP.
ATE29154T1 (en) PROCESS FOR SURFACE HARDENING OF METAL PARTS.
CA1190418A (en) Process for producing sintered ferrous alloys
US5498299A (en) Process for avoiding surface oxidation in the carburization of steels
ATE241711T1 (en) METHOD FOR DIRECT PROTECTION AGAINST WEAR CORROSION OF METAL OBJECTS
JPH0125823B2 (en)
HUP0203820A2 (en) Method for treating slags or slag mixtures on an iron bath
Mahieu et al. Surface and Sub-surface Characterization of Si-, Al-and P-alloyed TRIP-aided Steel
US2231009A (en) Heat treating process
CA2016843A1 (en) Thermochemical treatment of machinery components for improved corrosion resistance
KR910016956A (en) Manufacturing method of alloyed hot dip galvanized steel sheet
DE50008409D1 (en) Method and use of a device for nitrocarburizing ferrous materials
JPH0737645B2 (en) Decarburization suppression method for high carbon chrome bearing steel
US5194096A (en) Carburizing treatment of a steel with reduction of the hydrogen content in the carburized layer
Deng et al. Study on carburization of iron in upper part of blast furnace
Maldzinski et al. New possibilities of controlling the gas nitriding process by utilizing simulation of growth kinetics of nitride layers
SU1323588A1 (en) Method of heating steel articles in furnace
Khan et al. Formation of solid-state dendrites in an alloy steel
Holm Synthetic heat-treating atmospheres
CA1092496A (en) Method for improving the surface quality of annealed steel strip
Yorulmaz An investigation of boriding of medium carbon steels
KR100321047B1 (en) Annealing method of ferrite stainless steel strip for surface hardening

Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification

Ref document number: 0931849

Country of ref document: EP

EEIH Change in the person of patent owner