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1. (WO1998050594) STEEL COMPOSITIONS AND METHODS OF PROCESSING FOR PRODUCING COLD-FORMED AND CARBURIZED COMPONENTS WITH FINE-GRAINED MICROSTRUCTURES
PCT Biblio. Data
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Latest bibliographic data on file with the International Bureau
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Pub. No.:
WO/1998/050594
International Application No.:
PCT/US1998/009415
Publication Date:
12.11.1998
International Filing Date:
07.05.1998
Chapter 2 Demand Filed:
08.12.1998
IPC:
C21D 1/78
(2006.01),
C21D 8/00
(2006.01),
C21D 8/02
(2006.01),
C21D 8/04
(2006.01),
C22C 38/00
(2006.01),
C22C 38/06
(2006.01),
C22C 38/12
(2006.01),
C22C 38/44
(2006.01),
C22C 38/46
(2006.01),
C22C 38/48
(2006.01),
C23C 8/02
(2006.01)
C
CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
1
General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering
78
Combined heat-treatments not provided for above
C
CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
8
Modifying the physical properties by deformation combined with, or followed by, heat treatment
[IPC code unknown for ERROR IPC Code incorrect: invalid section (A=>H)!][IPC code unknown for ERROR IPC Code incorrect: invalid section (A=>H)!]
C
CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
C
CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
06
containing aluminium
C
CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
12
containing tungsten, tantalum, molybdenum, vanadium or niobium
C
CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
44
with molybdenum or tungsten
C
CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
46
with vanadium
C
CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
48
with niobium or tantalum
C
CHEMISTRY; METALLURGY
23
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
C
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
8
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
02
Pretreatment of the material to be coated
Applicants:
THE TIMKEN COMPANY
[US/US]; 1835 Dueber Avenue, S.W., Canton, OH 44706-2798 (US)
(For All Designated States Except US)
.
LEAP, Michael, J.
[US/US]; (US)
(For US Only)
.
WINGERT, James, C.
[US/US]; (US)
(For US Only)
Inventors:
LEAP, Michael, J.
; (US).
WINGERT, James, C.
; (US)
Agent:
ZIESENHEIM, Frederick, B.
; Webb Ziesenheim Bruening Logsdon Orkin & Hanson, P.C., 700 Koppers Building, 436 Seventh Avenue, Pittsburgh, PA 15219-1818 (US)
Priority Data:
60/045,860
08.05.1997
US
Title
(EN)
STEEL COMPOSITIONS AND METHODS OF PROCESSING FOR PRODUCING COLD-FORMED AND CARBURIZED COMPONENTS WITH FINE-GRAINED MICROSTRUCTURES
(FR)
COMPOSITIONS D'ACIER ET PROCEDES DE TRAITEMENT DESTINES A PRODUIRE DE COMPOSANTS CARBURES FORMES A FROID ET AYANT DES MICROSTRUCTURES A GRAIN FIN
Abstract:
(EN)
Steel compositions and processes are described that provide optimum resistance to austenite grain coarsening in cold-formed and carburized components for automotive and machine structural applications. The steel compositions include, in weight percent, 0.1-0.3 % C, 150-220 ppm N and a grain refining addition selected from the group consisting of Al, V plus Al and Nb plus Al, the balance comprising iron and other alloying elements typically found in carburizing grades of steel. The steels are processed by reheating to a temperature in the vicinity of a solution temperature of the least soluable species of grain refining precipitate and then hot worked. The hot-worked steel is cooled at an accelerated rate to 500 °C and then subcritically annealed, cold formed in at least one operation with intermediate anneals, subcritically annealed after the last cold-forming operation, and carburized, quenched and tempered (6).
(FR)
L'invention concerne des compositions et des procédés permettant d'obtenir une résistance optimale au grossissement des grains d'austénite, pour des composants carburés et formés à froid, servant dans des applications automobiles ou structurales pour machines. Ces compositions d'acier renferment, en pour cent du poids, 0,1 à 0,3 % de C, 150 à 220 ppm de N, et une adjonction d'affinage du grain, choisie dans le groupe composé de Al, V plus Al, et Nb plus Al, le solde étant constitué de fer et d'autres éléments d'alliage que l'on trouve généralement dans les classes de carburation d'acier. On traite ces aciers en les réchauffant, à une température proche de la température de solution des espèces les moins solubles d'un précipité d'affinage du grain, avant de les former à chaud. L'acier ainsi formé à chaud est ensuite refroidi, à une vitesse accélérée, jusqu'à 500 C, puis soumis à un recuit sous-critique, avant d'être formé à froid au cours d'au moins une opération entrecoupée de recuits. Cet acier est finalement soumis à un recuit sous-critique après la dernière opération de formage à froid, puis carburé, refroidi, et revenu (6).
Designated States:
AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG).
Publication Language:
English (
EN
)
Filing Language:
English (
EN
)