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1. WO2020110326 - NI-BASED ALLOY SOFTENED POWDER, AND METHOD FOR PRODUCING SAID SOFTENED POWDER

Publication Number WO/2020/110326
Publication Date 04.06.2020
International Application No. PCT/JP2019/003833
International Filing Date 04.02.2019
IPC
B22F 9/20 2006.01
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
9Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor
16using chemical processes
18with reduction of metal compounds
20starting from solid metal compounds
B22F 5/04 2006.01
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
5Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
04of turbine blades
C22C 19/05 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
19Alloys based on nickel or cobalt
03based on nickel
05with chromium
CPC
B22F 5/04
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
5Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
04of turbine blades
B22F 9/20
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
9Making metallic powder or suspensions thereof
16using chemical processes
18with reduction of metal compounds
20starting from solid metal compounds
C22C 19/05
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
19Alloys based on nickel or cobalt
03based on nickel
05with chromium
Applicants
  • 三菱日立パワーシステムズ株式会社 MITSUBISHI HITACHI POWER SYSTEMS, LTD. [JP]/[JP]
Inventors
  • 太田 敦夫 OTA Atsuo
  • 今野 晋也 IMANO Shinya
Agents
  • ポレール特許業務法人 POLAIRE I.P.C.
Priority Data
2018-22483330.11.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) NI-BASED ALLOY SOFTENED POWDER, AND METHOD FOR PRODUCING SAID SOFTENED POWDER
(FR) POUDRE RAMOLLIE D'ALLIAGE À BASE DE NI ET PROCÉDÉ DE PRODUCTION DE LADITE POUDRE RAMOLLIE
(JA) Ni基合金軟化粉末および該軟化粉末の製造方法
Abstract
(EN)
The present invention addresses the problem of providing: a Ni-based alloy softening powder which is a powder having better shaping processability/molding processability than before in spite of the fact that the powder is produced using a strongly precipitation-hardened Ni-based alloy material, and which is suitable for a powder metallurgy technique; and a method for producing the softened powder. The Ni-based alloy softened powder according to the present invention is a powder which has such a chemical composition that the equilibrium precipitation amount of a γ' phase precipitated in a γ phase that serves as a matrix phase becomes 30 to 80% by volume at 700°C, and has an average grain size of 5 to 500 μm, wherein each of grains of the softened powder is formed from a polycrystalline body of microcrystals of the γ phase, the powder being characterized in that the γ' phase is precipitated in an amount of 20% by volume or more on the grain boundaries of the microcrystals of the γ phase which constitute the grains, and the Vickers hardness of the grains at room temperature is 370 Hv or less.
(FR)
La présente invention aborde le problème de fourniture : d'une poudre ramollie d'alliage à base de Ni qui est une poudre présentant une meilleure aptitude au façonnage/moulage que précédemment en dépit du fait que la poudre soit produite à l'aide d'un matériau d'alliage à base de Ni durci fortement par précipitation et qui est appropriée pour une technique de métallurgie des poudres ; et d'un procédé de production de la poudre ramollie. La poudre ramollie d'alliage à base de Ni selon la présente invention est une poudre qui présente une composition chimique telle que la quantité de précipitation à l'équilibre d'une phase γ' précipitée dans une phase γ qui sert de phase de matrice représente 30 à 80 % en volume à 700 °C et présente une grosseur moyenne de grain de 5 à 500 µm, chacun des grains de la poudre ramollie étant formé d'un corps polycristallin de microcristaux de la phase γ, la poudre étant caractérisée en ce que la phase γ' est précipitée en une quantité de 20 % en volume ou plus sur les limites de grain des microcristaux de la phase γ qui constituent les grains et la dureté Vickers des grains à température ambiante est inférieure ou égale à 370 Hv.
(JA)
本発明は、強析出強化Ni基合金材料を用いながら、従来よりも成形加工性/成型加工性が良好な粉末であり、粉末冶金技術に好適なNi基合金軟化粉末および該軟化粉末の製造方法を提供することを目的とする。本発明に係るNi基合金軟化粉末は、母相となるγ相中に析出するγ'相の700℃における平衡析出量が30~80体積%となる化学組成を有し、該軟化粉末の平均粒度が5~500μmであり、該軟化粉末の粒子が前記γ相の微細結晶の多結晶体で構成される粉末であり、前記粒子を構成する前記γ相の微細結晶の粒界上に20体積%以上の前記γ'相が析出しており、前記粒子の室温のビッカース硬さが370 Hv以下である、ことを特徴とする。
Also published as
EP2019817113
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