Hardfacing alloy, methods, and products thereof
AssigneeDevasco International Inc.
InventorsGrant R. FOLKMANN, Keith E. MOLINE
Life of this patent
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Abstract
Disclosed is a hardfacing alloy deriving its usefulness from carbides and borides of molybdenum and niobium. The alloy does not rely on chromium as an alloying agent. The hardfacing alloy is capable of being applied to a number of industrial substrates in a crack-free manner, and once applied convert the substrate to a wear- and abrasion-resistant material having an extended service life, even when subjected to harsh wear conditions.
Claims58
An alloy composition comprising:
- from about 0.0 weight percent to about 5.0 weight percent carbon;
- from about 2.5 weight percent to about 8.0 weight percent molybdenum;
- from about 2.5 weight percent to about 8.0 weight percent niobium;
- from about 0.0 weight percent to about 3.0 weight percent boron;
- and
- the balance of the composition being iron, including impurities in trace amounts.
An alloy composition comprising:
- from about 0.0 weight percent to about 5.0 weight percent carbon;
- from about 2.5 weight percent to about 8.0 weight percent molybdenum;
- from about 2.5 weight percent to about 8.0 weight percent niobium;
- from about 0.0 weight percent to about 5.0 weight percent manganese;
- from about 0.0 weight percent to about 3.0 weight percent boron;
- and
- from about 0.0 weight percent to about 3.0 weight percent silicon,
- the balance of the composition being iron, including impurities in trace amounts.
A method of enhancing an industrial substrate, the method comprising:
- selecting a substrate;
- and
- applying an alloy onto at least a portion of a surface of the substrate, the alloy comprising:
- from about 0.0 weight percent to about 5.0 weight percent carbon;
- from about 2.5 weight percent to about 8.0 weight percent molybdenum;
- from about 2.5 weight percent to about 8.0 weight percent niobium;
- from about 0.0 weight percent to about 5.0 weight percent manganese;
- from about 0.0 weight percent to about 3.0 weight percent boron;
- and
- from about 0.0 weight percent to about 3.0 weight percent silicon,
- the balance of the composition being iron, including impurities in trace amounts,
- the alloy exhibiting a hardness on the Rockwell-C Hardness scale of from about 55 Rc to about 67 Rc, inclusive.
A powdered admixture comprising:
- from about 0.0 weight percent to about 5.0 weight percent carbon;
- from about 2.5 weight percent to about 8.0 weight percent molybdenum;
- from about 2.5 weight percent to about 8.0 weight percent niobium;
- from about 0.0 weight percent to about 5.0 weight percent manganese;
- from about 0.0 weight percent to about 3.0 weight percent boron;
- and
- from about 0.0 weight percent to about 3.0 weight percent silicon,
- the balance of the composition being iron, including impurities in trace amounts.
A wear and corrosion resistant alloy on a substrate, the alloy comprising hard, ultrafine, transition metal particles dispersed in a matrix and comprising:
- from about 0.0 weight percent to about 3.0 weight percent carbon;
- from about 2.5 weight percent to about 8.0 weight percent molybdenum;
- from about 2.5 weight percent to about 8.0 weight percent niobium;
- from about 0.0 weight percent to about 2.0 weight percent boron;
- and
- from about 0.0 weight percent to about 2.5 weight percent silicon,
- the balance of the composition being iron, including impurities in trace amounts
An alloy for welding to a surface to be abrasion resistant comprising by weight,
- about 0.3 to about 3.0 percent carbon,
- about 0.5 to about 2.0 percent boron,
- about 2.5 to about 7.0 percent molybdenum,
- about 2.5 to about 7.0 percent niobium,
- about 0.5 to about 3.5 percent manganese,
- about 0.6 to about 0.8 percent silicon,
- and the balance iron, including impurities as trace elements,
- the alloy having a hardness of from about 55 Rc (600 Hv) to about 67 Rc (900 Hv).
An alloy composition comprising:
- from about 0.0 weight percent to about 5.0 weight percent carbon;
- from about 2.5 weight percent to about 8.0 weight percent molybdenum;
- from about 2.5 weight percent to about 8.0 weight percent niobium;
- from about 0.0 weight percent to about 3.0 weight percent boron;
- and
- the balance of the composition being iron, including impurities in trace amounts.
A hardfacing alloy for welding to a surface to be abrasion resistant comprising by weight,
- about 0.3 to about 3.0 percent carbon,
- about 0.5 to about 2.0 percent boron,
- about 2.5 to about 7.0 percent molybdenum,
- about 2.5 to about 7.0 percent niobium,
- about 0.5 to about 3.5 percent manganese,
- about 0.6 to about 0.8 percent silicon,
- and the balance iron, including impurities as trace elements,
- the alloy having a hardness of from about 55 Rc (600 Hv) to about 67 Rc (900 Hv).
Dependencies are inferred from the claim text.