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1. IN201917048401 - COBALT-BASED ALLOY PRODUCT AND METHOD FOR PRODUCING SAME

Office
India
Application Number 201917048401
Application Date 26.11.2019
Publication Number 201917048401
Publication Date 02.10.2020
Publication Kind A
IPC
C22C 19/07
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
19Alloys based on nickel or cobalt
07based on cobalt
B22F 1/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
1Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
B33Y 10/00
BPERFORMING OPERATIONS; TRANSPORTING
33ADDITIVE MANUFACTURING TECHNOLOGY
YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
10Processes of additive manufacturing
B33Y 50/02
BPERFORMING OPERATIONS; TRANSPORTING
33ADDITIVE MANUFACTURING TECHNOLOGY
YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
50Data acquisition or data processing for additive manufacturing
02for controlling or regulating additive manufacturing processes
C22F 1/10
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS
1Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
10of nickel or cobalt or alloys based thereon
Applicants MITSUBISHI HITACHI POWER SYSTEMS, LTD.
Inventors WANG Yuting
IMANO Shinya
EGUCHI Shigenobu
Title
(EN) COBALT-BASED ALLOY PRODUCT AND METHOD FOR PRODUCING SAME
Abstract
(EN) The purpose of the present invention is to provide: a Co-based alloy product having mechanical properties that are equivalent or superior to those of precipitation-hardened Ni-based alloy materials; and a method for producing the Co-based alloy product. The Co-based alloy product according to the present invention has a chemical composition which contains 0.08 to 0.25% by mass of C, 0.1% by mass or less of B and 10 to 30% by mass of Cr, also contains 5% by mass or less of Fe and 30% by mass or less of Ni wherein the total amount of Fe and Ni is 30% by mass or less, also contains W and/or Mo wherein the total amount of W and Mo is 5 to 12% by mass inclusive, also contains at least one element selected from Ti, Zr, Hf, V, Nb and Ta in a total amount of 0.5 to 2% by mass inclusive, and also contains 0.5% by mass or less of Si, 0.5% by mass or less of Mn and 0.003 to 0.04% by mass of N, with the remainder made up by Co and impurities, wherein the impurities contain 0.5% by mass or less of Al and 0.04% by mass or less of O. The product is characterized in that the product is a polycrystal body of matrix phase crystals, post-segregation cells which have an average size of 0.13 to 2 µm inclusive are formed in crystal grains of the polycrystal body, and MC-type carbide phase grains each containing the Ti, the Zr, the Hf, the V, the Nb and/or the Ta are dispersed and deposited on the boundaries of the post-segregation cells.