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1. (WO2016063224) AN ULTRA-HIGH STRENGTH THERMO-MECHANICALLY PROCESSED STEEL
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2016/063224 International Application No.: PCT/IB2015/058107
Publication Date: 28.04.2016 International Filing Date: 21.10.2015
Chapter 2 Demand Filed: 17.08.2016
IPC:
C21D 8/00 (2006.01) ,C22C 38/00 (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
8
Modifying the physical properties by deformation combined with, or followed by, heat treatment
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
Applicants:
KALYANI, Babasaheb Neelkanth [IN/IN]; IN (US)
TAKALE, Madan Umakant [IN/IN]; IN (US)
DR. GNANA, Prakasam Balachandran [IN/IN]; IN (US)
DR. SINGH, Rajkumar Prasad [IN/IN]; IN (US)
CHAUTHAI, Abhay Ramchandra [IN/IN]; IN (US)
ARANGI, Suresh Babu [IN/IN]; IN (US)
MANE, Rajesh Surendra [IN/IN]; IN (US)
DHARMESH, Kumar [IN/IN]; IN (US)
PERLA, Srinivas [IN/IN]; IN (US)
PAWAR, Vinayak Pralhad [IN/IN]; IN (US)
JADHAV, Shital Shahaji [IN/IN]; IN (US)
BHARAT FORGE LIMITED [IN/IN]; Bharat Forge Limited; Mundhwa, Pune Cantonment Pune 411036, IN
KALYANI CARPENTER SPECIAL STEELS LIMITED [IN/IN]; Survey No. 72 - 76, Near Bharat Forge, Mundhwa Industrial Area, Mundhwa, Pune, Maharashtra Pune 411036, IN
Inventors:
KALYANI, Babasaheb Neelkanth; IN
TAKALE, Madan Umakant; IN
DR. GNANA, Prakasam Balachandran; IN
DR. SINGH, Rajkumar Prasad; IN
CHAUTHAI, Abhay Ramchandra; IN
ARANGI, Suresh Babu; IN
MANE, Rajesh Surendra; IN
DHARMESH, Kumar; IN
PERLA, Srinivas; IN
PAWAR, Vinayak Pralhad; IN
JADHAV, Shital Shahaji; IN
Agent:
TASE, Vijay; IN
Priority Data:
3355/MUM/201421.10.2014IN
Title (EN) AN ULTRA-HIGH STRENGTH THERMO-MECHANICALLY PROCESSED STEEL
(FR) ACIER TRAITÉ THERMOMÉCANIQUEMENT À TRÈS HAUTE RÉSISTANCE
Abstract:
(EN) The present invention disclosed an ultra-high strength steel for structural components, a process of making such steel that has a desirable microstructure in the thermo-mechanically processed and differently cooled conditions that delivers high fatigue performance in service, and a process of making forged components using such steel. The steel and the process of its manufacturing enables manufacture of components that exhibit bainitic microstructure that impart ultra- high strength ranges with very high fatigue performance. The invention enables saving in alloying additives compared to hardened and tempered alloy steels and in addition avoid expensive heat treatment operations to achieve the desired range of mechanical properties. The steel of the invention is a suitable replacement for micro alloyed steel or heat treated steel bars used for structural component development. The steel can be used for applied as the hot rolled and air cooled long products that can be directly used for applications or it can be directly hot forged in open or closed die forging followed by controlled cooling to achieve the desired microstructure and range of mechanical properties.
(FR) La présente invention concerne un acier à très haute résistance pour des éléments structuraux, un procédé de fabrication d'un tel acier qui a une microstructure souhaitable dans des conditions de traitement thermomécanique et de refroidissement différent qui permet d'obtenir une haute performance à la fatigue en service et un procédé de fabrication d'éléments forgés à utilisant un tel acier. L'acier et le procédé pour sa fabrication permettent la fabrication d'éléments qui présentent une microstructure bainitique qui confère des plages de très haute résistance avec une très haute performance à la fatigue. L'invention permet d'économiser des additifs d'alliage par comparaison avec des aciers d'alliage trempés et revenus et de plus d'éviter des opérations de traitement thermique onéreuses pour obtenir la plage de propriétés mécaniques souhaitée. L'acier selon l'invention est un produit de remplacement approprié de barres en acier microallié ou en acier traité thermiquement utilisées pour la production d'éléments structuraux. L'acier peut être utilisé pour être appliqué en tant que produits longs laminés à chaud et refroidis à l'air qui peuvent être directement utilisés pour des applications ou il peut être directement forgé à chaud en forgeage en matrice ouverte ou fermée suivi d'un refroidissement commandé pour obtenir la microstructure et la plage de propriétés mécaniques souhaitées.
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)