| 摘要 |
PURPOSE:To produce sintered hard alloy or cermet alloy articles having intricate shapes by an injection molding at the higher yield and higher productivity than those in the conventional method by using a specific water-soluble binder. CONSTITUTION:The sintered hard alloy or cermet alloy powder is mixed and kneaded with an org. binder and he mixture composed thereof is molded by the injection molding to obtain the molding having the shape resembling to the shape of the desired final product; thereafter, the org. binder is removed and the molding is sintered to form a green compact, from which the alloy articles are produced. The org. binder which is one kind of methyl cellulose, has 3 OH groups in the glucose residue contained therein, substitutes about 2 groups thereof with 27.5-31.5wt.% methoxy group and contains 0.5-5wt.% methyl cellulose is used. Water is incorporated at 2-11 wt.% therein as a solvent. |
