| 摘要 |
PURPOSE:To obtain a superior hard sintered alloy for tools with reduced stages by using the ground material consisting of a hard compd. and a solid. soln. of a binding metal and a hard compd. CONSTITUTION:Powder of a hard compd., and the ground material of a binding metal and a solid soln. of a binding metal and a hard compd. are mixed and agitated together with a solvent in a vessel, and the binding metals in the ground material are made into powder. The resultant ground powder mixture contains the fine powder of the binding metals thoroughly mixed in the powder of the hard compd. with good dispersibility and the powder of the hard compd. coated with the powder of the binding metals is included therein. If such powder mixture is used, the green compact of good moldability and high strength is obtainable and the hard sintered compact of a uniform compsn. is obtainable without presintering. Further the superior hard sintered alloy is easily obtained by the use of the ground material consisting of the eutectic compsn. of the hard comp. and the binding metals. |
