Global Patent Index - EP 3842556 A1

EP 3842556 A1 20210630 - INOCULATION PROCESS FOR GRAIN REFINEMENT OF A NICKEL BASE ALLOY

Title (en)

INOCULATION PROCESS FOR GRAIN REFINEMENT OF A NICKEL BASE ALLOY

Title (de)

IMPFVERFAHREN ZUR KORNFEINERUNG EINER NICKELBASISLEGIERUNG

Title (fr)

PROCÉDÉ D'INOCULATION POUR LE RAFFINAGE DU GRAIN D'UN ALLIAGE À BASE DE NICKEL

Publication

EP 3842556 A1 20210630 (EN)

Application

EP 19383203 A 20191227

Priority

EP 19383203 A 20191227

Abstract (en)

An inoculation process of a nickel base alloy, wherein the process is carried out in a vacuum furnace and comprises: a) providing a melt of a nickel base alloy in vacuum conditions, characterized in that the inoculation process further comprises: b) introducing an encapsulated inoculant comprising a mixture of Co<sub>3</sub>FeNb<sub>2</sub> and CrFeNb(Ni) inside the melt of the nickel base alloy at a temperature from 1450 to 1500 °C for a period from 5 to 30 seconds, c) immediately pouring the inoculated nickel base alloy of step b) into a mold, preferably at a temperature from 1450 to 1500 °C, and d) cooling said inoculated nickel base alloy.

IPC 8 full level

C22C 1/02 (2006.01); C22C 1/06 (2006.01); C22C 3/00 (2006.01); C22C 19/03 (2006.01); C22C 19/05 (2006.01); F27B 5/04 (2006.01)

CPC (source: EP)

C22C 1/023 (2013.01); C22C 1/06 (2013.01); C22C 3/00 (2013.01); C22C 19/03 (2013.01); C22C 19/05 (2013.01)

Citation (applicant)

  • G. MARAHLEHA. R. I. KHEDERH. F. HAMAD: "CREEP-LIFE PREDICTION OF SERVICE-EXPOSED TURBINE BLADES", MATERIALS SCIENCE, vol. 42, no. 4, 2006
  • KUMAR, S.SUDHAKAR RAO, G.CHATTOPADHYAY, K.MAHOBIA, G.S.SANTHI SRINIVAS, N.C.SINGH, V.: "Effect of Surface Nanostructure on Tensile Behavior of Superalloy IN718", MATERIALS AND DESIGN, 2014
  • LI YING-JUMA XIAO-PINGYANG YUAN-SHENG: "Grain refinement of as-cast superalloy IN718 under action of low voltage pulsed magnetic field", TRANS. NONFERROUS MET. SOC. CHINA, vol. 21, 2011, pages 1277 - 1282
  • J.R. BRINEGARL.F. NORRISL. ROSENBERG: "Superalloy", 1984, article "The Metallurgical Society of AIME", pages: 23
  • "Grain Refinement in Casting and Welds", 1983, THE METALLURGICAL SOCIETY OF AIME, pages: 197
  • "Superalloys 1984, The Metallurgical Society of AIME", 1984, THE METALLURGICAL SOCIETY OF AIME, pages: 33
  • J.M. LANE: "Microcast-x Fine Grained Castings for Aerospace Industry", PRESENTED AT AEROMAT'93 CONFERENCE, 1993
  • A.F. DENZINET.A. KOLAKOWSKIJ.F. WALLANCE, PROCEEDING AGARD CONFERENCE ON ADVANCED CASTING TECHNOLOGY, AGARD CONFERENCE PROCEEDING, 1982
  • A. N. CHEREPANOVV. E. OVCHARENKO: "Effect of Nanostructured Composite Powders on the Structure and Strength Properties of the High_Temperature Inconel 718 Alloy", THE PHYSICS OF METALS AND METALLOGRAPHY, vol. 116, no. 12, 2015, pages 1279 - 1284
  • LIN LIUTAIWEN HUANGYUHUA XIONGAIMIN YANGZHILONG ZHAOARONG ZHANGJINSHAN LI: "Grain refinement of superalloy K4169 by addition of refiners: cast structure and refinement mechanisms", MATERIALS SCIENCE AND ENGINEERING A, vol. 394, no. 2005, pages 1 - 8

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3842556 A1 20210630; EP 3842556 B1 20230705; ES 2958763 T3 20240214

DOCDB simple family (application)

EP 19383203 A 20191227; ES 19383203 T 20191227