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1. (WO2018220648) A PROCESS OF MANUFACTURING OF SEGMENTS FOR CARBON THRUST BEARING
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Pub. No.: WO/2018/220648 International Application No.: PCT/IN2018/050349
Publication Date: 06.12.2018 International Filing Date: 31.05.2018
IPC:
B21J 5/00 (2006.01) ,F16C 33/00 (2006.01) ,C21D 1/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
J
FORGING; HAMMERING; PRESSING; RIVETING; FORGE FURNACES
5
Methods for forging, hammering, or pressing; Special equipment or accessories therefor
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
C
SHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
33
Parts of bearings; Special methods for making bearings or parts thereof
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
Applicants:
SARADVA, Atulkumar Raghavjibhai [IN/IN]; IN
Inventors:
SARADVA, Atulkumar Raghavjibhai; IN
Agent:
ACHARYA, Rajeshkumar H.; IN
GADANI, Nilam K.; IN
Priority Data:
20172101955303.06.2017IN
Title (EN) A PROCESS OF MANUFACTURING OF SEGMENTS FOR CARBON THRUST BEARING
(FR) PROCÉDÉ DE FABRICATION DE SEGMENTS POUR PALIER DE BUTÉE EN CARBONE
Abstract:
(EN) A process of manufacturing of segment for carbon thrust bearing uses stainless-steel (SS) round bars/sheets/logs of suitable grade as raw material. The SS round bars/sheets/logs undergo cutting operation to cut into SS billets. The billets successively undergo heating and hot forging processes to form segments of desired shapes. Thereafter, the segment is subjected to heat treatment process i.e. stress relieving, hardening and tempering process successively for obtaining consistent and uniform grain structure, mechanical properties and physical properties of segments which are cost-effective in terms of lower maintenance and lower handling efforts. After heat-treatment process, segment undergoes surface-finishing processes i.e. grinding, lapping and polishing successively for obtaining mirror like surface finishing that gives greater anti-friction property and lower co-efficient of friction. The manufacturing process according to present invention yields consistent grain structure, refine, dense and uniform microstructure of segments which imparts optimum strength, ductility, toughness and resistance to impact and fatigue.
(FR) La présente invention concerne un procédé de fabrication de segment pour palier de butée en carbone qui utilise des barres rondes/feuilles/rondins en acier inoxydable (SS) de qualité appropriée en tant que matière première. Les barres rondes/feuilles/rondins en SS subissent une opération de coupe pour découpe en billettes de SS. Les billettes subissent successivement des processus de chauffage et de forgeage à chaud pour former des segments de formes souhaitées. Ensuite, le segment est soumis à un processus de traitement thermique, c’est-à-dire un processus de détente, de durcissement et de revenu successivement pour obtenir une structure de grain régulière et uniforme, des propriétés mécaniques et des propriétés physiques de segments qui sont économiques en termes de maintenance réduite et d’efforts de manipulation réduits. Après le processus de traitement thermique, le segment subit des processus de finition de surface, à savoir un meulage, un rodage et un polissage successivement pour obtenir une finition de surface de type miroir qui confère une propriété antifrottement supérieure et un coefficient de frottement plus faible. Le procédé de fabrication selon la présente invention permet d’obtenir une structure de grain régulière, une microstructure affinée, dense et uniforme de segments qui confère une résistance, une ductilité, une ténacité et une résistance aux chocs et à la fatigue optimales.
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, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, 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)