PREPARATION METHOD OF TUNGSTEN ALLOY PRECURSOR COMPOSITE POWDER, CERAMIC ALUMINUM OXIDE ENHANCED TUNGSTEN ALLOY AND PREPARATION METHOD THEREOF

摘要

The present invention relates to a preparation method of tungsten alloy precursor composite powder, a ceramic aluminum oxide enhanced tungsten alloy and a preparation method thereof, and belongs to the technical field of a tungsten alloy. The preparation method of the tungsten alloy precursor composite powder in the present invention comprises: providing the mixed solution of ammonium metatungstate and soluble aluminum salt, adding oxalic acid into the mixed solution till pH is not larger than 1.5, a complex reaction is carried out, then removing the solvent to obtain the mixed powder. The preparation method of the present invention uses oxalic acid to adjust the pH after liquid-liquid mixing, hydrogen ions and tungstate ions in the solution will react to generate tungstate precipitate; oxalate ions and aluminum ions react to generate aluminum oxalate precipitate, due to the co-reaction and co-precipitation of tungstic acid and aluminum oxalate, serious segregation caused by the mass difference of tungsten atomic nucleuses and aluminum atomic nucleuses can be avoided, the uniformity degree of tungstic acid and aluminum oxalate in the obtained powder is improved, molecular mixing is achieved, and a raw material base is provided for improving high-temperature wear-resisting erosion-resistance performance of tungsten alloy.