Coating material and method of manufacturing same, coating method, and moving blade with shroud

Abstract

The present invention provides a coating material, a method of manufacturing the coating material and a coating method using the coating material that are capable of forming a coating film that retains high abrasion resistance while offering improved oxidation resistance at high temperatures, and also provides a moving blade fitted with a shroud. A coating material is used that comprises not less than 14% by mass and not more than 30% by mass of Mo, not less than 13% by mass and not more than 20% by mass of Cr, and not less than 0.5% by mass and not more than 4% by mass of Si, may further comprise not more than 1.5% by mass of Ni, not more than 1.5% by mass of Fe, and not more than 0.08% by mass of C, and comprises a balance of Co and unavoidable impurities, wherein the material further comprises at least one added component selected from the group consisting of not less than 0.01% by mass and not more than 3% by mass of Y, not less than 0.01% by mass and not more than 10% by mass of Al, and not less than 0.1% by mass and not more than 10% by mass of Fe.

1 . A coating material, comprising:
 not less than 14% by mass and not more than 30% by mass of Mo,   not less than 13% by mass and not more than 20% by mass of Cr, and   not less than 0.5% by mass and not more than 4% by mass of Si,   which may further comprise:   not more than 1.5% by mass of Ni,   not more than 1.5% by mass of Fe, and   not more than 0.08% by mass of C,   and comprising a balance of Co and unavoidable impurities, wherein   the coating material further comprises at least one added component selected from the group consisting of:   not less than 0.01% by mass and not more than 3% by mass of Y,   not less than 0.01% by mass and not more than 10% by mass of Al, and   not less than 0.1% by mass and not more than 10% by mass of Fe.   
   
   
       2 . The coating material according to  claim 1 , wherein the added component is not less than 0.01% by mass and not more than 3% by mass of Y. 
   
   
       3 . The coating material according to  claim 1 , wherein the added component is not less than 0.01% by mass and not more than 10% by mass of Al. 
   
   
       4 . The coating material according to  claim 1 , wherein the added component is not less than 0.1% by mass and not more than 10% by mass of Fe. 
   
   
       5 . The coating material according to  claim 1 , wherein the added component is composed of:
 not less than 0.01% by mass and not more than 10% by mass of Al, and   not less than 0.1% by mass and not more than 10% by mass of Fe.   
   
   
       6 . The coating material according to  claim 1 , wherein the added component is composed of:
 not less than 0.01% by mass and not more than 10% by mass of Al, and   not less than 0.01% by mass and not more than 3% by mass of Y.   
   
   
       7 . The coating material according to  claim 1 , wherein the added component is composed of:
 not less than 0.01% by mass and not more than 10% by mass of Al,   not less than 0.1% by mass and not more than 10% by mass of Fe, and   not less than 0.01% by mass and not more than 3% by mass of Y.   
   
   
       8 . A coating method, comprising forming a coating film on a substrate surface by high-velocity flame spraying, using a spray powder composed of the coating material according to  claim 1 . 
   
   
       9 . A coating method, comprising forming a coating film on a substrate surface by low pressure plasma spraying or atmospheric plasma spraying, using a spray powder composed of the coating material according to  claim 1 . 
   
   
       10 . The coating method according to  claim 8 , wherein a diffusion heat treatment is performed after forming the coating film. 
   
   
       11 . A moving blade fitted with a shroud in which a shroud is provided at a tip of a turbine moving blade, wherein
 the shroud comprises a contact surface that contacts another shroud provided at a tip of an adjacently positioned moving blade when the blade is in use, and   the contact surface comprises a coating film formed using the coating method according to  claim 8 .   
   
   
       12 . The coating method according to  claim 9 , wherein a diffusion heat treatment is performed after forming the coating film. 
   
   
       13 . A moving blade fitted with a shroud in which a shroud is provided at a tip of a turbine moving blade, wherein
 the shroud comprises a contact surface that contacts another shroud provided at a tip of an adjacently positioned moving blade when the blade is in use, and   the contact surface comprises a coating film formed using the coating method according to  claim 9 .   
   
   
       14 . A moving blade fitted with a shroud in which a shroud is provided at a tip of a turbine moving blade, wherein
 the shroud comprises a contact surface that contacts another shroud provided at a tip of an adjacently positioned moving blade when the blade is in use, and   the contact surface comprises a coating film formed using the coating method according to  claim 10 .   
   
   
       15 . A moving blade fitted with a shroud in which a shroud is provided at a tip of a turbine moving blade, wherein
 the shroud comprises a contact surface that contacts another shroud provided at a tip of an adjacently positioned moving blade when the blade is in use, and   the contact surface comprises a coating film formed using the coating method according to  claim 12 .