FE-NI ALLOY HAVING EXCELLENT OUTGAS CHARACTERISTICS AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2022/190813

A1

The present invention pertains to an Fe-Ni alloy comprising 0.001-0.2 mass% of C, 0.001-0.30 mass% of Si, 0.005-0.7 mass% of Mn, 30.0-45.0 mass% of Ni, 0.30 mass% or less of Cr, 0.001-0.1 mass% of Al, 0.020 mass% or less of Ti, 0.0050 mass% or less of Mg, 0.007 mass% or less of O, 0.0015 mass% or less of Ca, and 0.00005-0.001 mass% of Na, the remaining portion being Fe and unavoidable impurities. Of all nonmetal inclusions in the alloy, the count proportion of CaO-SiO2-Al2O3-MgO-MnO-Na2O inclusions is 40% or more, and the count proportions of CaO inclusions, Na2O inclusions, MgO·Al2O3 inclusions, and MnO·SiO2 inclusions are each 20% or less. The CaO-SiO2-Al2O3-MgO-MnO-Na2O inclusions each contain 20-60 mass% of CaO, 10-40 mass% of SiO2, 30 mass% or less of Al2O3, 5-50 mass% of MgO, and 0.001-1 mass% of Na2O, the remaining portion being MnO. The MgO·Al2O3 inclusions each contain 10-40 mass% of MgO and 60-90 mass% of Al2O3. Accordingly, the Fe-Ni alloy has excellent outgas characteristics suitable for use in a vacuum environment.

MIZUNO KENJI (JP)
KIRIHARA FUMIAKI (JP)

PCT/JP2022/006564

September 15, 2022

February 18, 2022

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NIPPON YAKIN KOGYO CO LTD (JP)

B22D11/00; B21B3/02; C21C7/00; C21C7/04; C21C7/06; C21C7/064; C21D9/46; C22C38/00; C22C38/14; C22C38/50

JP3247338B2	2002-01-15
JP3597777B2	2004-12-08
JP3881626B2	2007-02-14
JP4261601B2	2009-04-30
JP3499349B2	2004-02-23

SUENARI, Mikio (JP)

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