25-07-2013 дата публикации
Номер: US20130186237A1
A thermal spray powder 20 is provided for use in a thermal spray technique, such as flame spraying, plasma spraying, cold spraying, and high velocity oxygen fuel spraying (HVOF). The thermal spray powder 20 is formed by water or gas atomization and comprises 3.0 to 7.0 wt. % carbon, 10.0 to 25.0 wt. % chromium, 1.0 to 5.0 wt. % tungsten, 3.5 to 7.0 wt. % vanadium, 1.0 to 5.0 wt. % molybdenum, not greater than 0.5 wt. % oxygen, and at least 40.0 wt. % iron, based on the total weight of the thermal spray powder 20. The thermal spray powder 20 can be applied to a metal body, such as a piston or piston ring, to form a coating. The thermal spray powder 20 can also provide a spray-formed part. 1. A powder metal material for use in a thermal spray technique , comprising: 3.0 to 7.0 wt. % carbon , 10.0 to 25.0 wt. % chromium , 1.0 to 5.0 wt. % tungsten , 3.5 to 7.0 wt. % vanadium , 1.0 to 5.0 wt. % molybdenum , not greater than 0.5 wt. % oxygen , and at least 40.0 wt. % iron , based on the total weight of the powder metal material.2. The powder metal material of including 3.5 to 4.0 wt. % carbon claim 1 , 11.0 to 15.0 wt. % chromium claim 1 , 1.5 to 3.5 wt. % tungsten claim 1 , 4.0 to 6.5 wt. % vanadium claim 1 , 1.0 to 3.0 wt. % molybdenum claim 1 , not greater than 0.3 wt. % oxygen claim 1 , and 50.0 to 81.5 wt. % iron.3. The powder metal material of consisting of 3.8 wt. % carbon claim 2 , 13.0 wt. % chromium claim 2 , 2.5 wt. % tungsten claim 2 , 6.0 wt. % vanadium claim 2 , 1.5 wt. % molybdenum claim 2 , 0.2 wt. % oxygen claim 2 , 70.0 to 80.0 wt. % iron claim 2 , and impurities in an amount not greater than 2.0 wt. %.4. The powder metal material of including at least one of cobalt claim 1 , niobium claim 1 , titanium claim 1 , manganese claim 1 , sulfur claim 1 , silicon claim 1 , phosphorous claim 1 , zirconium claim 1 , and tantalum.5. The powder metal material of including metal carbides in an amount of at least 15.0 vol. % claim 1 , based on the total volume of ...
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