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US 10,094,010 B2Granted
Cobalt-free, galling and wear resistant austenitic stainless steel hard-facing alloy
AssigneeThe Ohio State University
InventorsRyan Thomas Smith, Tapasvi Lolla, Sudarsanam Suresh Babu, David Wayne Gandy, John Albert Siefert, Gregory J. Frederick, Lou Lherbier, David Novotnak
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Abstract
A strain-hardenable stainless steel alloy includes hard secondary phases dispersed in an austenitic primary phase, the alloy including 0.3-0.6% nitrogen by weight.
Claims8
A method of making a hard-faced metallic component, comprising:
- bonding a layer of a stainless steel alloy in powder form to a surface of a metallic component, such that the layer defines an outer surface, wherein the stainless steel alloy is void of cobalt and comprises hard secondary phases dispersed in an austenitic primary phase, the alloy consisting essentially of, by weight:
- 21.0 to 27.0% chromium;
- 3.0 to 7.0% manganese;
- 2.0 to 6.0% nickel;
- 1.5 to 4.0% silicon;
- 1.0 to 5.0% molybdenum;
- 0.9 to 1.3% carbon;
- 0.44-0.55% nitrogen;
- the balance iron and impurities;
- hot isostatic pressing (“HIP”) the layer at a HIP temperature to bond the layer to the component;
- allowing the layer to cool in air;
- heating the layer to a solution annealing temperature greater than the HIP temperature;
- and quenching the layer in water.
10 more elements
A method of making a hard-faced metallic component, comprising:
- bonding a layer of a stainless steel alloy in powder form to a surface of a metallic component, such that the layer defines an outer surface, wherein the stainless steel alloy is void of cobalt and comprises hard secondary phases dispersed in an austenitic primary phase, the alloy consisting essentially of, by weight:
- 21.0 to 27.0% chromium;
- 3.0 to 7.0% manganese;
- 2.0 to 6.0% nickel;
- greater than 3 to 4.0% silicon;
- 1.0 to 5.0% molybdenum;
- 0.9 to 1.3% carbon;
- 0.3-0.6% nitrogen;
- the balance iron and impurities;
- hot isostatic pressing (“HIP”) the layer at a HIP temperature to bond the layer to the component;
- allowing the layer to cool in air;
- heating the layer to a solution annealing temperature greater than the HIP temperature;
- and quenching the layer in water.
10 more elements
Dependencies are inferred from the claim text.