WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Options
Query Language
Stem
Sort by:
List Length
Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO2017016978) METHOD FOR MANUFACTURING MECHANICAL COMPONENTS MADE OF COMPACTED GRAPHITE IRON OR GRAY CAST IRON
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2017/016978 International Application No.: PCT/EP2016/067427
Publication Date: 02.02.2017 International Filing Date: 21.07.2016
IPC:
C21D 5/00 (2006.01) ,C22C 37/00 (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
5
Heat treatment of cast-iron
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
37
Cast-iron alloys
Applicants: ZANARDI FONDERIE S.P.A.[IT/IT]; Via Nazionale 3 37046 Minerbe, IT
Inventors: ZANARDI, Franco; IT
VETTORE, Federico; IT
Agent: MODIANO, Micaela; IT
Priority Data:
10201500003778824.07.2015IT
Title (EN) METHOD FOR MANUFACTURING MECHANICAL COMPONENTS MADE OF COMPACTED GRAPHITE IRON OR GRAY CAST IRON
(FR) PROCÉDÉ DE FABRICATION DE COMPOSANTS MÉCANIQUES EN FONTE À GRAPHITE VERMICULAIRE OU FONTE GRISE
Abstract:
(EN) A method for manufacturing mechanical components made of compacted graphite iron or gray cast iron, comprising the following steps: – providing a casting of a mechanical component made of gray cast iron or compacted graphite iron having at least 50% of ferritic structure and having a carbon content comprised between 2.5% and 4.0% and a silicon content comprised between 1.0% and 4.0%; – bringing said casting to a temperature that is higher than the lower austenitizing temperature (Ac1) and lower than the upper austenitizing temperature (Ac3) for a time required to obtain an at least partially austenitic structure; – performing a thermal treatment for isothermal hardening at a temperature comprised between 230°C and 400°C in order to obtain a matrix that has a substantially pearlitic-ferritic or perferritic structure.
(FR) La présente invention concerne un procédé de fabrication de composants mécaniques en fonte à graphite vermiculaire ou fonte grise, comprenant les étapes suivantes consistant à : fournir une pièce coulée de composant mécanique en fonte grise ou en fonte à graphite vermiculaire ayant au moins 50 % de structure ferritique et une teneur en carbone comprise entre 2,5 % et 4,0 % et une teneur en silicium comprise entre 1,0 % et 4,0 % ; amener ladite pièce coulée à une température supérieure à la température d'austénisation inférieure (Ac1) et inférieure à la température d'austénitisation supérieure (Ac3) pendant un laps de temps nécessaire pour obtenir une structure au moins partiellement austénitique ; effectuer un traitement thermique de durcissement isotherme à une température comprise entre 230 °C et 400 °C afin d'obtenir une matrice qui présente une structure essentiellement perlitique-ferritique ou perferritique.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)