High-temperature material transferring member

Abstract

A high-temperature material transferring member including a coating film formed on a surface of base metal, wherein the coating film is a composite coating film using a mixed powder made up of: a Co-based alloy powder containing, in mass %, 0.03 to 0.6% of C, 0.2 to 3% of Si, 22 to 35% of Cr, and more than 50% of Co; and a Cr carbide powder, the composite coating film is formed by the plasma powder overlaying process. The high-temperature material transferring member has excellent build-up resistance particularly in a gas atmosphere of 1100° C. or more. The high-temperature material transferring member has excellent in build-up resistance, oxidation resistance, and heat cracking resistance.

1 . A high-temperature material transferring member including a coating film formed on a surface of base metal by a plasma powder overlaying process, wherein the coating film is a composite coating film using a mixed powder made up of a Co-based alloy powder containing, in mass %, 0.03 to 0.6% of C, 0.2 to 3% of Si, 22 to 35% of Cr, and more than 50% of Co, and a Cr carbide powder. 
     
     
         2 . A high-temperature material transferring member including a coating film formed on a surface of base metal by a plasma powder overlaying process, wherein the coating film is a composite coating film using a mixed powder made up of: a Co-based alloy powder containing, in mass %, 0.03 to 0.6% of C, 0.2 to 3% of Si, 22 to 35% of Cr, and more than 50% of Co, with the balance being impurities; and a Cr carbide powder. 
     
     
         3 . The high-temperature material transferring member according to  claim 2 , wherein the Co-based alloy powder further contains, in mass %, one or more elements selected from the following groups <1> to <4>:
 <1> Mn: 10% or less, Cu: 10% or less, Ni: 10% or less, and Fe: 10% or less; 
 <2> Mo: 10% or less, and W: 10% or less; 
 <3> B: 3% or less, Ti: 3% or less, V: 3% or less, Zr: 3% or less, Nb: 3% or less, and Ta: 3% or less; and 
 <4> Al: 1% or less, Ca: 1% or less, and REM: 1% or less. 
 
     
     
         4 . The high-temperature material transferring member according to  claim 1 , wherein the content of Cr carbide powder is 20 to 70 vol % in a volume ratio with respect to a total amount of mixed powder. 
     
     
         5 . The high-temperature material transferring member according to  claim 2 , wherein the content of Cr carbide powder is 20 to 70 vol % in a volume ratio with respect to a total amount of mixed powder. 
     
     
         6 . The high-temperature material transferring member according to  claim 3 , wherein the content of Cr carbide powder is 20 to 70 vol % in a volume ratio with respect to a total amount of mixed powder. 
     
     
         7 . The high-temperature material transferring member according to  claim 1 , wherein an endothermic reaction temperature of the coating film is 1250° C. or more. 
     
     
         8 . The high-temperature material transferring member according to  claim 2 , wherein an endothermic reaction temperature of the coating film is 1250° C. or more. 
     
     
         9 . The high-temperature material transferring member according to  claim 3 , wherein an endothermic reaction temperature of the coating film is 1250° C. or more. 
     
     
         10 . The high-temperature material transferring member according to  claim 4 , wherein an endothermic reaction temperature of the coating film is 1250° C. or more. 
     
     
         11 . The high-temperature material transferring member according to  claim 5 , wherein an endothermic reaction temperature of the coating film is 1250° C. or more. 
     
     
         12 . The high-temperature material transferring member according to  claim 6 , wherein an endothermic reaction temperature of the coating film is 1250° C. or more. 
     
     
         13 . The high-temperature material transferring member according to  claim 2 , wherein the high-temperature material transferring member has excellent build-up resistance in a gas atmosphere of 1100° C. or more. 
     
     
         14 . The high-temperature material transferring member according to  claim 3 , wherein the high-temperature material transferring member has excellent build-up resistance in a gas atmosphere of 1100° C. or more. 
     
     
         15 . The high-temperature material transferring member according to  claim 5 , wherein the high-temperature material transferring member has excellent build-up resistance in a gas atmosphere of 1100° C. or more. 
     
     
         16 . The high-temperature material transferring member according to  claim 6 , wherein the high-temperature material transferring member has excellent build-up resistance in a gas atmosphere of 1100° C. or more. 
     
     
         17 . The high-temperature material transferring member according to  claim 8 , wherein the high-temperature material transferring member has excellent build-up resistance in a gas atmosphere of 1100° C. or more. 
     
     
         18 . The high-temperature material transferring member according to  claim 9 , wherein the high-temperature material transferring member has excellent build-up resistance in a gas atmosphere of 1100° C. or more. 
     
     
         19 . The high-temperature material transferring member according to  claim 11 , wherein the high-temperature material transferring member has excellent build-up resistance in a gas atmosphere of 1100° C. or more. 
     
     
         20 . The high-temperature material transferring member according to  claim 12 , wherein the high-temperature material transferring member has excellent build-up resistance in a gas atmosphere of 1100° C. or more.