Eutectic Corporation

Frederick T Jaeger

The invention contemplates a method and means for making a dryer or the like roll having a ferrous metal surface provided with a surface coating of a hardfacing alloy, the ferrous metal surface having a thermal conductivity relative to silver taken as 1 cal/cm.sup.2 /cm/.degree.C./sec of at least about 0.06 the hardfacing alloy being a hardfacing heat, corrosion and wear resistant iron-group metal-base alloy mechanically and metallurgically bonded to said ferrous metal surface which is preferably made of cast iron, the hardfacing alloy coating having a thickness ranging from about 0.01 to 0.15 inch, the thermal conductivity of said coating being at least 0.05.

Method of making a composite cast iron dryer or the like

An alloy-coated ferrous metal substrate is disclosed, the ferrous metal making up said substrate having a thermal conductivity relative to silver taken as 1 cal./sq.cm/cm/.degree. C/sec at substantially ambient temperature of at least about 0.06, the alloy coating being selected from the group consisting of a self-fluxing heat and corrosion resistant iron-group metal-base alloy and a self-fluxing copper-base alloy fused and metallurigically bonded to said ferrous metal substrate, said alloy coating having a thickness of about 0.005 to 0.15 inch, the thermal conductivity of said coating being at least about 0.05.

Alloy-coated ferrous metal substrate

A boiler tube coating and method are disclosed in which industrial steel tubes or pipes, for example, steel boiler tubes and/or integrated panels of steel boiler tubes, are provided with a fused overlay of a corrosion and erosion resistant coating comprised of a refractory hard component, e.g. tungsten carbide, dispersed through a corrosion resistant matrix alloy.

Boiler tube coating and method for applying the same

A drier roll having a ferrous metal surface is provided with a surface coating of a hardfacing alloy, the ferrous metal surface having a thermal conductivity relative to silver taken as 1 cal/cm.sup.2 /cm/.degree. C/sec of at least about 0.06, the hardfacing alloy being a hardfacing heat, corrosion and wear resistant iron-group metal-base alloy mechanically and metallurgically bonded to said ferrous metal surface which is preferably made of cast iron, the hardfacing alloy coating having a thickness ranging from about 0.01 to 0.15 inch, the thermal conductivity of said coating being at least 0.05.

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Rosemere, Canada

Frederick T Jaeger