Thermal spraying powder, thermal spraying method, and method for forming thermal spray coating

Abstract

A thermal spraying powder contains a chromium-iron based alloy powder that includes carbon. The ratio of the mass of carbon in the alloy powder to the total mass of chromium and iron in the alloy powder is 2% or more. 10% particle size D 10 of the alloy powder is preferably 10 μm or more, and more preferably 15 μm or more. 50% particle size D 50 of the alloy powder is preferably 20 μm or more. The thermal spraying powder is suitable for use in forming a thermal spray coating through high-velocity flame spraying.

1 . A thermal spraying powder comprising a chromium-iron based alloy powder that includes carbon, wherein the ratio of the mass of carbon in the alloy powder to the total mass of chromium and iron in the alloy powder is 2% or more.  
     
     
         2 . The thermal spraying powder according to  claim 1 , wherein the ratio of the mass of carbon in the alloy powder to the total mass of chromium and iron in the alloy powder is 3% or more.  
     
     
         3 . The thermal spraying powder according to  claim 1 , wherein 10% particle size D 10  of the alloy powder is 10 μm or more.  
     
     
         4 . The thermal spraying powder according to  claim 3 , wherein the 10% particle size D 10  of the alloy powder is 15 μm or more.  
     
     
         5 . The thermal spraying powder according to  claim 1 , wherein 50% particle size D 50  of the alloy powder is 20 μm or more.  
     
     
         6 . The thermal spraying powder according to  claim 1 , wherein the content of chromium in the alloy powder is 60% by mass or more.  
     
     
         7 . The thermal spraying powder according to  claim 1 , wherein the thermal spraying powder is used for forming a thermal spray coating through high-velocity flame spraying.  
     
     
         8 . A method comprising performing high-velocity flame spraying of a thermal spraying powder containing a chromium-iron based alloy powder that includes carbon, wherein the ratio of the mass of carbon in the alloy powder to the total mass of chromium and iron in the alloy powder is 2% or more.  
     
     
         9 . A method for forming a thermal spray coating, comprising forming a thermal spray coating through high-velocity flame spraying of a thermal spraying powder containing a chromium-iron based alloy powder that includes carbon, wherein the ratio of the mass of carbon in the alloy powder to the total mass of chromium and iron in the alloy powder is 2% or more.