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AssigneeHitachi Metals, Ltd.
InventorsToshihiro Uehara, Koji Sato, Shuichi Nakamura
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There is disclosed a shadow mask support member for supporting a shadow mask of a Braun tube which member comprises a parallel bonded-type bimetal, and has a high strength and an excellent resistance to thermal resistance. There is also disclosed a method of producing such a support member. The shadow mask support member includes a high-strength, low-expansion alloy plate, and a high-expansion alloy plate which are bonded together on their marginal surfaces, the low-expansion alloy plate having an excellent resistance to thermal deformation, the low-expansion alloy plate consisting essentially, by weight, of 0.1-0.5% C, not more than 1.0% Si, not more than 2.0% Mn, 30-40% Ni, 1.0-5.0% Mo and the balance Fe and incidental impurities, the low-expansion alloy plate having an average thermal expansion coefficient of not more than 6 .times.10.sup.-6 /.degree. C. at 30.degree.-100.degree. C. and a tensile strength of not less than 100 kgf/mm.sup.2 at a room temperature, and the high-expansion alloy plate having an average thermal expansion coefficient of not less than 14.times.10.sup.-6 /.degree. C. at 30.degree.-100.degree. C. and a tensile strength of not less than 110 kgf/mm.sup.2 at a room temperature. Optionally, the low-expansion alloy plate may further contain not more than 10.0% Cr and not more than 10.0% Co, and the content of (Ni+Co) is 30-40%.
A shadow mask support member comprising a high-strength, low-expansion alloy plate, and a high-expansion alloy plate which are bonded together on their marginal surfaces, said low-expansion alloy plate having an excellent resistance to thermal deformation, said low-expansion alloy plate consisting essentially, by weight, of 0.1-0.5% C, 1.0% or less Si, 2.0% or less Mn, 30-40% Ni, 1.0-5.0% Mo and the balance Fe and incidental impurities, said low-expansion alloy plate having an average thermal expansion coefficient of 6.times.10.sup.-6 /.degree. C. or less at 30.degree.-100.degree. C. and a tensile strength of 100 kgf/mm.sup.2 or greater at a room temperature, and said high-expansion alloy plate having an average thermal expansion coefficient of 14.times.10.sup.-6 /.degree. C. or greater at 30.degree.-100.degree. C. and a tensile strength of 110 kgf/mm.sup.2 or greater at a room temperature.
A shadow mask support member comprising a high-strength, low-expansion alloy plate, and a high-expansion alloy plate which are bonded together on their marginal surfaces, said low-expansion alloy plate having an excellent resistance to thermal deformation, said low-expansion alloy plate consisting essentially, by weight, or 0.1-0.5% C, 1.0% or less Si, 2.0% or less Mn, 10.0% or less Cr, 30-40% Ni, 1.0-5.0% Mo and the balance Fe and incidental impurities, said low-expansion alloy plate having an average thermal expansion coefficient of 10.times.10.sup.-6 /.degree. C. or less at 30-100% and a tensile strength of 100 kgf/mm.sup.2 or greater at a room temperature, and said high-expansion alloy plate having an average thermal expansion coefficient of 14.times.10.sup.-6 /.degree. C. or greater at 30.degree.-100.degree. C. and a tensile strength of 110 kgf/mm.sup.2 or greater at a room temperature.
A shadow mask support member comprising a high-strength, low-expansion alloy plate, and a high-expansion alloy plate which are bonded together on their marginal surfaces, said low-expansion alloy plate having an excellent resistance to thermal deformation, said low-expansion alloy plate consisting essentially, by weight, of 0.1-0.5% C, 1.0% or less Si, 2.0% or less Mn, 30-40% Ni, 10.0% or less Co, 1.0-5.0% Mo and the balance Fe and incidental impurities, Ni+Co being 30-40%, said low-expansion alloy plate having an average thermal expansion coefficient of 6.times.10.sup.-6 /.degree. C. or less at 30.degree.-100.degree. C. and a tensile strength of 100 kgf/mm.sup.2 or greater at a room temperature, and said high-expansion alloy plate having an average thermal expansion coefficient of 14.times.10.sup.-6 /.degree. C. or less at 30.degree.-100.degree. C. and a tensile strength of 110 kgf/mm.sup.2 or greater at a room temperature.
A shadow mask support member comprising a high-strength, low-expansion alloy plate, and a high-expansion alloy plate which are bonded together on their marginal surfaces, said low-expansion alloy plate having an excellent resistance to thermal deformation, said low-expansion alloy plate consisting essentially, by weight, of 0.1-0.5% C, 1.0% or less Si, 2.0% or less Mn, 10.0% or less Cr, 30-40% Ni, 10.0% or less Co, 1.0-5.0% Mo and the balance Fe and incidental impurities, Ni+Co being 30-40%, said low-expansion alloy plate having an average thermal expansion coefficient of 10.times.10.sup.-6 /.degree. C. or less at 30.degree.-100.degree. C. and a tensile strength of 100 kgf/mm.sup.2 kgf/mm.sup.2 or greater at a room temperature, and said high-expansion alloy plate having an average thermal expansion coefficient of 14.times.10.sup.-6 /.degree. C. or greater at 30.degree.-100.degree. C. and a tensile strength of 110 kgf/mm.sup.2 or greater at room temperature.
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