Composite wire for wear resistant coatings
AssigneeThe Perkin-Elmer Corporation
InventorsFrank N. Longo, Joseph D. Reardon, Anil Bansal
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Abstract
A composite wire useful for arc gun spraying is formed of an alloy sheath comprising iron, nickel, or cobalt, and a core comprising boron-containing powder of boron and/or boron carbide sufficiently fine in size such that the boron is substantially dissolved in a coating produced by arc gun spraying the composite wire. Where the boron substance includes boron, the core should further comprise fine carbon powder less than 20 microns in size blended with the boron powder. Preferably a substantial portion of the boron-containing powder is less than 20 microns. In a particularly desirable embodiment, the sheath is formed of mild steel and the core comprises boron carbide and an alloy powder such as ferromolybdenum.
Claims38
A composite wire useful for arc gun spraying, formed of an alloy sheath comprising a metal selected from the group consisting of iron, nickel, cobalt and combinations thereof, and of a core comprising a boron-containing powder of at least one boron substance selected from the group consisting of boron and boron carbide, a substantial portion of the boron-containing powder being less than 20 microns in size.
A composite wire useful for arc gun spraying, formed of an alloy sheath comprising iron and a core comprising ferromolbdenum alloy and boron carbide, a substantial portion of the boron carbide powder being less than 20 microns in size.
A composite wire useful for arc gun spraying, formed of an alloy sheath comprising iron and a core comprising iron and molybdenum and further comprising a boron-containing powder consisting essentially of boron and carbon, a substantial portion of the boron-containing powder being less than 20 microns in size.
A composite wire useful for arc gun spraying, formed of an alloy sheath comprising a metal selected from the group consisting of iron, nickel and cobalt, and a core comprising a boron-containing powder of boron carbide, a substantial portion of the boron-containing powder being less than 20 microns in size.
A composite wire useful for arc gun spraying, formed of a sheath of mild steel and a core, the core comprising boron carbide powder having a size between about 15 microns and 1 micron and ferromolybenum powder having a size between about 420 microns and about 44 microns, the boron in the boron carbide being present in an amount of about 1 and 10 percent and the molybdenum in the ferromolybdenum being present in an amount of about 5 and 50 percent, the percentages being by weight of the wire.
A composite wire useful for arc gun spraying, formed of a sheath of nickel and a core, the core comprising boron carbide powder having a size between about 15 microns and 1 micron, nickel-chromium alloy powder having a size between about 420 microns and about 44 microns, and silicon powder having a size between about 10 microns and about 1 micron, the boron in the boron carbide being present in an amount of about 0.75 to 7.5 percent, the chromium in the alloy powder being present in an amout of about 5 to 50 percent and the silicon being present in an amount of about 0.5 to 5 percent, the percentage being by weight of the wire.
Dependencies are inferred from the claim text.