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1. WO2020195405 - LOW THERMAL EXPANSION ALLOY HAVING EXCELLENT LOW TEMPERATURE STABILITY AND METHOD FOR PRODUCING SAME

Publication Number WO/2020/195405
Publication Date 01.10.2020
International Application No. PCT/JP2020/006778
International Filing Date 20.02.2020
IPC
C22C 38/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
B22F 3/105 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
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
10Sintering only
105by using electric current, laser radiation or plasma
B22F 3/16 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
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
12Both compacting and sintering
16in successive or repeated steps
B22F 9/08 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
02using physical processes
06starting from liquid material
08by casting, e.g. through sieves or in water, by atomising or spraying
B33Y 70/00 2020.01
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
70Materials specially adapted for additive manufacturing
C22C 38/10 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
10containing cobalt
Applicants
  • 日本鋳造株式会社 NIPPON CHUZO K.K. [JP]/[JP]
Inventors
  • 半田 卓雄 HANDA Takuo
  • 劉 志民 RYU Shimin
  • 大山 伸幸 OYAMA Nobuyuki
  • 鷲尾 勝 WASHIO Masaru
Agents
  • 高山 宏志 TAKAYAMA Hiroshi
Priority Data
2019-05806326.03.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) LOW THERMAL EXPANSION ALLOY HAVING EXCELLENT LOW TEMPERATURE STABILITY AND METHOD FOR PRODUCING SAME
(FR) ALLIAGE À FAIBLE DILATATION THERMIQUE AYANT UNE EXCELLENTE STABILITÉ À BASSE TEMPÉRATURE ET SON PROCÉDÉ DE PRODUCTION
(JA) 低温安定性に優れる低熱膨張合金およびその製造方法
Abstract
(EN)
Provided is a low thermal expansion alloy that contains, in mass%, not more than 0.015% of C, not more than 0.10% of Si, not more than 0.15% of Mn, 35.0-37.0% of Ni, and less than 2.0% of Co. Ni+0.8Co is 35.0-37.0%, and the remaining portion is Fe and unavoidable impurities. The low thermal expansion alloy has a solidification structure in which the secondary dendrite-arm spacing is 5 μm or less, has an average thermal expansion coefficient in a range of 0±0.2 ppm/°C at 100°C to -70°C, and has an Ms point of -196°C or less.
(FR)
L'invention concerne un alliage à faible dilatation thermique qui contient, en % en masse, pas plus de 0,015 % de C, pas plus de 0,10 % de Si, pas plus de 0,15 % de Mn, 35,0 à 37,0 % de Ni et moins de 2,0 % de Co, la somme Ni +0,8Co ayant une valeur de 35,0 à 37,0 % et la partie restante étant constituée de Fe et d'impuretés inévitables. L'alliage à faible dilatation thermique a une structure de solidification dans laquelle l'espacement entre bras et dendrites secondaires est de 5 µm ou moins ; il a un coefficient de dilatation thermique moyen de l'ordre de 0 ± 0,2 ppm par °C entre 100 °C et -70 °C ; et il a un point Ms de -196 °C ou moins.
(JA)
質量%で、C:0.015%以下、Si:0.10%以下、Mn:0.15%以下、Ni:35.0~37.0%、Co:2.0%未満を含有し、かつNi+0.8Co:35.0~37.0%であり、残部がFeおよび不可避不純物からなり、デンドライト2次アーム間隔が5μm以下である凝固組織を有し、100~-70℃の平均熱膨張係数が0±0.2ppm/℃の範囲で、かつMs点が-196℃以下である低熱膨張合金が提供される。
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