FE-NI ALLOY HAVING HIGH STRENGTH AND LOW THERMAL EXPANSION, A SHADOW MASK MADE OF THE ALLOY, A BRAUN TUBE WITH THE SHADOW MASK, A LEAD FRAME MADE OF THE ALLOY AND A SEMICONDUCTOR ELEMENT WITH LEAD FRAME
First Claim
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1. An Fe—
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 30 to 50% of Ni, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the following equation is fulfilled;
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Abstract
Disclosed is an Fe—Ni alloy consisting of, by mass, 30 to 50% of Ni (or 27 to 47% Ni and not more than 22% Co), 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the equation
is fulfilled. In the alloy, preferably, the maximum grain size of compounds primarily containing Nb and nitrogen and other compounds primarily containing Nb and C is less than 0.5 μm, which can be observed at an fractional section of metal structure, and a total number of the compounds is not less than 50,000/mm2 at an fractional section. An average grain size of the alloy structure is not less than 10 by the crystal grain size number as defined in JIS G0551. The alloy may applied to shadow masks for the Braun tube and lead frames for semiconductor elements.
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Citations
21 Claims
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1. An Fe—
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 30 to 50% of Ni, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the following equation is fulfilled;
- View Dependent Claims (3, 4, 9, 10, 11, 12, 19, 20, 21)
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 30 to 50% of Ni, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the following equation is fulfilled;
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2. An Fe—
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 30 to 50% of Ni, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the following equation is fulfilled;
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 30 to 50% of Ni, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the following equation is fulfilled;
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5. An Fe—
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 27 to 47% of Ni, not more than 22% of Co, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the following equation is fulfilled;
- View Dependent Claims (7, 8, 13, 14, 15, 16)
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 27 to 47% of Ni, not more than 22% of Co, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the following equation is fulfilled;
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6. An Fe—
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 27 to 47% of Ni, not more than 22% of Co, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities,
wherein the following equation is fulfilled;
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 27 to 47% of Ni, not more than 22% of Co, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities,
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17. An Fe—
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 30 to 50% of Ni, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the following equation is fulfilled;
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 30 to 50% of Ni, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the following equation is fulfilled;
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18. An Fe—
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 27 to 47% of Ni, not more than 22% of Co, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the following equation is fulfilled;
- Ni alloy having high strength and low thermal expansion, consisting essentially of, by mass percent, 27 to 47% of Ni, not more than 22% of Co, 0.005 to 0.1% of Nb, less than 0.01% of C, 0.002 to 0.02% of N, and the balance of Fe and inevitable impurities, wherein the following equation is fulfilled;
Specification
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Current AssigneeHitachi Metals (Thailand) Ltd.
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Original AssigneeHitachi Metals (Thailand) Ltd.
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InventorsInoue, Ryoji, Nishida, Junichi, Seo, Takehisa
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Primary Examiner(s)Yee, Deborah
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Application NumberUS09/810,176Publication NumberTime in Patent Office848 DaysField of Search420/94, 420/95, 420/581, 420/459, 148/336, 148/419, 313/402, 318/405US Class Current420/94CPC Class CodesC21D 6/001 containing Ni C21D6/004 tak...C21D 6/02 Hardening by precipitationC21D 8/0205 of ferrous alloysC22C 38/001 containing NC22C 38/004 Very low carbon steels, i.e...C22C 38/04 containing manganeseC22C 38/08 containing nickel C22C38/10...C22C 38/105 containing Co and NiC22C 38/12 containing tungsten, tantal...H01J 2229/0733 characterised by the materialH01J 29/07 Shadow masks for colour tel...H01L 23/49579 characterised by the materi...H01L 2924/00 Indexing scheme for arrange...H01L 2924/0002 Not covered by any one of g...
