Heavy-duty heat-responsive bimetallic material
AssigneeG. Rau GmbH & Co.
InventorHeinz Spengler
Life of this patent
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Abstract
The bimetallic material comprises a laminate of two materials, one having a high coefficient of thermal expansion, one with a low coefficient of thermal expansion. The material with the high coefficient of expansion is a corrosion resisting and heat resisting austenitic chromium-nickel steel, while the material with the low coefficient of expansion is a heat hardenable alloy of iron, nickel, cobalt and titanium and/or aluminium. It is found that this combination of materials gives rise to a bimetallic material capable of heavy duty applications without the disadvantages normally associated with such heavy duty materials.
Claims4
A heavy-duty heat-responsive bimetallic material which comprises at least one metallic component of a material having a high coefficient of thermal expansion joined to a further metallic component of a material having a relatively low coefficient of thermal expansion, the material having a high coefficient of thermal expansion being a corrosion and heat resisting austenitic chromium-nickel steel consisting essentially of 14-26% by weight of chromium and 6-36% by weight of nickel, the remainder being iron and melt impurities and the material having the relatively low coefficient of thermal expansion being a thermally hardenable iron-nickel-titanium alloy consisting essentially of 30-55% by weight of nickel, 1-5% by weight of free titanium, the remainder being iron and melt impurities.
A heavy-duty heat-responsive bimetallic material which comprises at least one metallic component of a material having a high coefficient of thermal expansion joined to a further metallic component of a material having a relatively low coefficient of thermal expansion, the material having a high coefficient of thermal expansion being a corrosion and heat resisting austenitic chromium-nickel steel consisting essentially of 14-26% by weight of chromium and 6-36% by weight of nickel, the remainder being iron and melt impurities and the material having the relatively low coefficient of thermal expansion being a thermally hardenable iron-nickel-cobalt-titanium alloy consisting essentially of 26-39% by weight of nickel, 3-16% by weight of cobalt, 1-5% by weight of free titanium, the remainder being iron and melt impurities.
Dependencies are inferred from the claim text.