Method for removing prior particle boundary and hole defect of powder metallurgy high-temperature alloy

Abstract

A method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy. The method includes performing mechanical ball milling treatment on an atomized powder, thermosetting the powder to form a shape, and preparing a powder metallurgy high-temperature alloy.

1 . A method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy, comprising: first performing mechanical ball milling treatment on high-temperature alloy powder prepared by using an atomization method to prepare surface activated solid powder, then thermosetting the powder to form a shape, and preparing a powder metallurgy high-temperature alloy. 
     
     
         2 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 1 , wherein granularity of the atomized alloy powder is less than or equal to 150 μm. 
     
     
         3 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 1 , wherein in ball milling, a used ball mill is one of a planetary ball mill, a stirring ball mill, and a roller drum ball mill. 
     
     
         4 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 3 , wherein ball milling is performed under protection of an inert gas. 
     
     
         5 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 3 , wherein atomized powder is put into a ball mill pot with a ball-to-powder ratio of: (8-12): 1, and ball milling is performed in a planetary ball mill for 1-4 h at a ball milling rotation speed of 250-350 r/min. 
     
     
         6 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 3 , wherein atomized powder is put into a ball mill pot with a ball-to-powder ratio of: (8-15): 1, and ball milling is performed in a stirring ball mill for 2-6 h at a ball milling rotation speed of 60-150 r/min. 
     
     
         7 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 4 , wherein thermosetting forming uses one forming manner of hot iso-hydrostatic forming, hot extrusion forming, and plasma sintering forming. 
     
     
         8 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 7 , wherein a processing parameter of the hot iso-hydrostatic forming is 1000-1250° C./100-150 MPa/4 h; processing parameters of the hot extrusion forming are: performing hot extrusion forming at 900-1200° C.; an extrusion ratio of the hot extrusion forming is (6-15): 1; and a processing parameter of the plasma sintering forming is: 1000-1250° C./40-150 MPa/5-10 min. 
     
     
         9 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 8 , wherein solution treatment and aging treatment are performed on a material of the high-temperature alloy formed by thermosetting. 
     
     
         10 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 9 , wherein processing parameters of the solution treatment are: performing heat preservation for 1-2 h at 1000-1250° C., and performing air cooling; and processing parameters of the aging treatment are: performing heat preservation for 4-10 h at 700-900° C., and performing air cooling. 
     
     
         11 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 1 , wherein thermosetting forming uses one forming manner of hot iso-hydrostatic forming, hot extrusion forming, and plasma sintering forming. 
     
     
         12 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 2 , wherein thermosetting forming uses one forming manner of hot iso-hydrostatic forming, hot extrusion forming, and plasma sintering forming. 
     
     
         13 . The method for removing prior particle boundaries and hole detects of a powder metallurgy high-temperature alloy according to  claim 3 , wherein thermosetting forming uses one forming mariner of hot iso-hydrostatic forming, hot extrusion forming, and plasma sintering forming. 
     
     
         14 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 5 , wherein thermosetting forming uses one forming manner of hot iso-hydrostatic forming, hot extrusion forming, and plasma sintering forming. 
     
     
         15 . The method for removing prior particle boundaries and hole defects of a powder metallurgy high-temperature alloy according to  claim 6 , wherein thermosetting forming uses one forming manner of hot iso-hydrostatic forming, hot extrusion forming, and plasma sintering forming.