FR73326E - Perfectionnements apportés aux procédés pour l'établissement de pièces métalliques devant subir un traitement pour la formation d'au moins un alliage superficiel de diffusion, notamment à base de chrome - Google Patents

Perfectionnements apportés aux procédés pour l'établissement de pièces métalliques devant subir un traitement pour la formation d'au moins un alliage superficiel de diffusion, notamment à base de chrome

Info

Publication number: FR73326E
Authority: FR; France
Prior art keywords: piece; fluoride; diffusion alloy; treatment; metal
Prior art date: 1953-02-04
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.): Expired

Application number

FR56880A

Other languages

English (en)

Inventor

Philippe Galmiche

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.)

Office National dEtudes et de Recherches Aerospatiales ONERA

Original Assignee

Office National dEtudes et de Recherches Aerospatiales ONERA

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.)

1953-02-04

Filing date

1956-03-26

Publication date

1960-11-30

1956-03-26 Application filed by Office National dEtudes et de Recherches Aerospatiales ONERA filed Critical Office National dEtudes et de Recherches Aerospatiales ONERA

1960-11-30 Application granted granted Critical

1960-11-30 Publication of FR73326E publication Critical patent/FR73326E/fr

Status Expired legal-status Critical Current

Links

229910052751 metal Inorganic materials 0.000 title abstract 5
239000002184 metal Substances 0.000 title abstract 5
239000000956 alloy Substances 0.000 title abstract 3
229910045601 alloy Inorganic materials 0.000 title abstract 3
238000009792 diffusion process Methods 0.000 title abstract 3
VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title 1
230000015572 biosynthetic process Effects 0.000 title 1
229910052804 chromium Inorganic materials 0.000 title 1
239000011651 chromium Substances 0.000 title 1
238000000034 method Methods 0.000 title 1
KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract 5
KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract 4
239000011248 coating agent Substances 0.000 abstract 2
238000000576 coating method Methods 0.000 abstract 2
238000005245 sintering Methods 0.000 abstract 2
239000011230 binding agent Substances 0.000 abstract 1
238000010438 heat treatment Methods 0.000 abstract 1
229910052739 hydrogen Inorganic materials 0.000 abstract 1
239000001257 hydrogen Substances 0.000 abstract 1
125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
239000013528 metallic particle Substances 0.000 abstract 1
239000000843 powder Substances 0.000 abstract 1
239000000126 substance Substances 0.000 abstract 1

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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/06—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
- C23C16/08—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material from metal halides
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/02—Pretreatment of the material to be coated
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
- C23C10/08—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases only one element being diffused
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
- C23C10/08—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases only one element being diffused
- C23C10/10—Chromising
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
- C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
- C23C10/38—Chromising
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
- C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
- C23C10/38—Chromising
- C23C10/40—Chromising of ferrous surfaces
- C23C10/42—Chromising of ferrous surfaces in the presence of volatile transport additives, e.g. halogenated substances
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Materials Engineering (AREA)
Organic Chemistry (AREA)
Chemical Kinetics & Catalysis (AREA)
General Chemical & Material Sciences (AREA)
Manufacturing & Machinery (AREA)
Physics & Mathematics (AREA)
Thermal Sciences (AREA)
Crystallography & Structural Chemistry (AREA)
Powder Metallurgy (AREA)
Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

FR56880A 1953-02-04 1956-03-26 Perfectionnements apportés aux procédés pour l'établissement de pièces métalliques devant subir un traitement pour la formation d'au moins un alliage superficiel de diffusion, notamment à base de chrome Expired FR73326E (fr)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
FR40253X		1953-02-04
FR631962		1953-03-12
FR120353X		1953-03-12

Publications (1)

Publication Number	Publication Date
FR73326E true FR73326E (fr)	1960-11-30

Family

ID=27245008

Family Applications (3)

Application Number	Title	Priority Date	Filing Date
FR1060225D Expired FR1060225A (fr)	1953-02-04	1952-07-11	Perfectionnements apportés aux procédés pour l'établissement de pièces métalliques devant subir un traitement pour la formation d'au moins un alliage superficiel de diffusion, notamment à base de chrome
FR67580D Expired FR67580E (fr)	1953-02-04	1955-02-16	Perfectionnements apportés aux procédés pour l'établissement de pièces métalliques devant subir un traitement pour la formation d'au moins un alliage superficiel de diffusion, notamment à base de chrome
FR56880A Expired FR73326E (fr)	1953-02-04	1956-03-26	Perfectionnements apportés aux procédés pour l'établissement de pièces métalliques devant subir un traitement pour la formation d'au moins un alliage superficiel de diffusion, notamment à base de chrome

Family Applications Before (2)

Application Number	Title	Priority Date	Filing Date
FR1060225D Expired FR1060225A (fr)	1953-02-04	1952-07-11	Perfectionnements apportés aux procédés pour l'établissement de pièces métalliques devant subir un traitement pour la formation d'au moins un alliage superficiel de diffusion, notamment à base de chrome
FR67580D Expired FR67580E (fr)	1953-02-04	1955-02-16	Perfectionnements apportés aux procédés pour l'établissement de pièces métalliques devant subir un traitement pour la formation d'au moins un alliage superficiel de diffusion, notamment à base de chrome

Country Status (5)

Country	Link
US (1)	US3185566A (fr)
CH (1)	CH316865A (fr)
DE (1)	DE1189723B (fr)
FR (3)	FR1060225A (fr)
GB (1)	GB783952A (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1060225A (fr) *	1953-02-04	1954-03-31	Onera (Off Nat Aerospatiale)	Perfectionnements apportés aux procédés pour l'établissement de pièces métalliques devant subir un traitement pour la formation d'au moins un alliage superficiel de diffusion, notamment à base de chrome
DE1248420B (de) *	1963-08-14	1967-08-24	Yawata Iron & Steel Co	Verfahren zur Sinterung und gleichzeitigen Diffusionsveredelung von Eisen- und Stahlgegenstaenden
US3373018A (en) *	1965-02-17	1968-03-12	Allied Chem	Production of rigid shapes of refractory metals by decomposition of the metal hexafluoride in the interstices of a green compact
US3359098A (en) *	1965-02-17	1967-12-19	Allied Chem	Consolidation by chemical sintering
US3410684A (en) *	1967-06-07	1968-11-12	Chrysler Corp	Powder metallurgy
US3535103A (en) *	1968-04-10	1970-10-20	Atomic Energy Commission	Method of making metal alloy powders
US3778586A (en) *	1970-04-02	1973-12-11	Composite Sciences	Process for coating metals using resistance heating of preformed layer
US3917149A (en) *	1972-09-15	1975-11-04	Mallory Composites	Process of preparing embossed sintered articles of manufacture
JPS6274001A (ja) *	1985-09-26	1987-04-04	Nippon Kokan Kk <Nkk>	金属焼結体の製造方法
US4839139A (en) *	1986-02-25	1989-06-13	Crucible Materials Corporation	Powder metallurgy high speed tool steel article and method of manufacture
US5672387A (en) *	1994-08-12	1997-09-30	Sumitomo Electric Industries, Ltd.	Process for the production of heat- and corrosion-resistant porous metal body
US9457405B2 (en) *	2012-05-29	2016-10-04	H.C. Starck, Inc.	Metallic crucibles and methods of forming the same
JP7590327B2 (ja) *	2018-12-18	2024-11-26	セルモビリティ・インコーポレイテッド	電極としての使用のための階層構造を有する大面積銅ナノフォーム

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2656595A (en) *		1953-10-27		Chromium-alloyed corrosion-resist
DE673505C (de) *	1935-01-17	1939-03-23	Franz Skaupy Dr	Verfahren zur Herstellung von kompakten Metallkoerpern
DE753651C (de) *	1943-02-21	1953-06-29	Ig Farbenindustrie Ag	Verfahren zur gleichzeitigen Krafterzeugung, Rueckgewinnung von Ammoniak aus gebrauchtem und Anwaermung von frischem Kupfer-Kunstseide-Faellwasser
DE893601C (de) *	1943-10-21	1953-10-19	Eisen & Stahlind Ag	Verfahren zur Herstellung von Diffusionsueberzuegen
DE851580C (de) *	1944-03-03	1952-10-06	Basf Ag	Verfahren zur Erzeugung von Niobueberzuegen auf Metallen
GB617849A (en) *	1946-10-22	1949-02-11	Metal Gas Company Ltd	Improvements in the manufacture of articles from ferrous metal powders
US2657127A (en) *	1950-03-31	1953-10-27	American Electro Metal Corp	Production of chromium-alloyed corrosion-resistant metal powders and related products
US2874070A (en) *	1951-05-16	1959-02-17	Onera (Off Nat Aerospatiale)	Method for the formation of diffusion superficial alloys, in particular chromium alloys
FR1060225A (fr) *	1953-02-04	1954-03-31	Onera (Off Nat Aerospatiale)	Perfectionnements apportés aux procédés pour l'établissement de pièces métalliques devant subir un traitement pour la formation d'au moins un alliage superficiel de diffusion, notamment à base de chrome
US2875112A (en) *	1955-06-13	1959-02-24	Deutsche Edelstahlwerke Ag	Process for improving the physical properties of chromized articles

1952
- 1952-07-11 FR FR1060225D patent/FR1060225A/fr not_active Expired
1953
- 1953-06-03 CH CH316865D patent/CH316865A/fr unknown
- 1953-06-16 DE DEO3006A patent/DE1189723B/de active Pending
- 1953-06-30 GB GB24462/55A patent/GB783952A/en not_active Expired
1955
- 1955-02-16 FR FR67580D patent/FR67580E/fr not_active Expired
1956
- 1956-03-26 FR FR56880A patent/FR73326E/fr not_active Expired
1960
- 1960-04-19 US US23138A patent/US3185566A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
DE1189723B (de)	1965-03-25
GB783952A (en)	1957-10-02
CH316865A (fr)	1956-10-31
FR67580E (fr)	1958-03-14
US3185566A (en)	1965-05-25
FR1060225A (fr)	1954-03-31

Publication	Publication Date	Title
GB1144873A (en)	1969-03-12	Process of casting metals
GB783952A (en)	1957-10-02	Improvements in the manufacture of sintered metal articles
GB1364793A (en)	1974-08-29	Composite heayv duty bushing and method of making the same
SE8105392L (sv)	1981-09-10	Metallkomposition och forfarande for framstellning av densamma
GB783411A (en)	1957-09-25	Improvements in or relating to containers for molten metal
GB996319A (en)	1965-06-23	Improvements relating to metals for use in welding
GB1448008A (en)	1976-09-02	Process for making sintered metal foils
FR2016098A1 (en)	1970-05-08	Manufacture of metal articles, from - powder
ES482331A1 (es)	1980-04-01	Placa resistente al fuego para un cierre de corredera en re-cipientes que contienen banos de fusion.
GB746248A (en)	1956-03-14	Process of forming composite strips of backing and bearing metals
GB1091420A (en)	1967-11-15	Method for bonding a powdered ingredient compact and article
FR1242894A (fr)	1960-10-07	Perfectionnements aux procédés métallurgiques utilisant des hydrocarbures, et particulièrement aux procédés d'élaboration de métal liquide au haut fourneau électrique
US2302607A (en)	1942-11-17	Means for treating steel
GB1079904A (en)	1967-08-16	Improvements in and relating to metallurgical devices, in operation coming into contact with metal melts such as iron and steel melts
ES406629A1 (es)	1976-01-16	Un procedimiento para la produccion de un material ferreo sinterizado por pulvimetalurgia.
GB930089A (en)	1963-07-03	Piston ring
FR2221421A1 (en)	1974-10-11	Silicon oxynitride refractories mfr. - by mixing with metal oxides, compacting and sintering at high temp.
GB827132A (en)	1960-02-03	Improvements in methods of forming superficial diffusion alloys containing chromium
SU65417A1 (ru)	1944-11-30	Способ получени изделий из металлических порошков
Krupin et al.	1974	Rolling of metals in vacuum
FR1031168A (fr)	1953-06-22	Perfectionnements apportés aux procédés pour la formation d'alliages superficielsde diffusion sur des pièces métalliques, notamment sur des pièces réfractaires
ES377295A2 (es)	1972-07-01	Procedimiento de tratamiento de superficies metalicas.
FR1031167A (fr)	1953-06-22	Perfectionnements apportés aux procédés pour la formation, en phase gazeuse, d'alliages superficiels de diffusion sur des pièces métalliques, notamment d'alliages de chrome
FR1098067A (fr)	1955-07-18	Perfectionnements apportés aux procédés pour la formation d'alliages superficiels de diffusion, notamment sur des pièces réfractaires
FR1077890A (fr)	1954-11-12	Perfectionnements aux procédés pour la fabrication de briquettes, notamment de celles servant à l'addition de métaux facilement oxydables ou volatils à des bains de métaux en fusion