Metallographic etchant capable of clearly displaying delta phase in GH4169 alloy and application method

[0033] A metallographic etchant clearly showing the delta phase in GH4169 alloy and its use method, the steps are as follows: sample cutting and preparation. The GH4169 alloy sample was cut into a size range (length×width×height) of (12mm×12mm×8mm) by a wire cutting machine, and the edge of the sample was chamfered by a grinding wheel; the sample was ground and polished. Use metallographic sandpaper with a particle size of 400 mesh for rough grinding in flowing water through a grinder; then use 600 mesh and 800 mesh sandpaper for fine grinding, and finally use finer 1000 mesh sandpaper for fine grinding. After grinding in one direction, use a finer grade of sandpaper for grinding and rotate the sample angle by 90° to eliminate the grinding scratches of the upper grade of coarse sandpaper. After grinding with sandpaper, use a polishing machine and an abrasive paste with a particle size of 3 microns to polish the observation surface of the metallographic sample until there is no ob

[0035] A metallographic etchant clearly showing the delta phase in GH4169 alloy and its application method, the characteristic steps are as follows: sample cutting and preparation. The GH4169 alloy sample was cut into a size range (length×width×height) of (10mm×10mm×15mm) by a wire cutting machine, and the edges of the sample were chamfered by a grinding wheel; Rough grinding in running water; followed by fine grinding with 500-mesh and 800-mesh sandpaper, and finally fine grinding with finer 1000-mesh sandpaper. After grinding in one direction, use a finer grade of sandpaper for grinding and rotate the sample angle by 90 degrees to eliminate the grinding scratches of the upper grade of coarse sandpaper. After grinding with sandpaper, use a polishing machine and an abrasive paste with a particle size of 3 microns to polish the observation surface of the metallographic sample until there is no obvious scratch on the observation surface of the sample under light. The polished samp