| 摘要 |
PURPOSE:To obtain iron-copper-base sintered parts which are firmly joined into one body by combining a green compact provided with boss parts contg. substantially no B and a green compact provided with hole parts contg. B above prescribed ratio, both of which consist essentially of iron and copper respectively and sintering the combined green compacts. CONSTITUTION:Of the above-mentioned two green compacts to be joined, the green compact provided with bosses is of the compsn. contg. essentially of iron and copper and contg. no B or contg. <0.03% B. On the other hand, the green compact provided with hole parts consists essentially of iron and copper and contains >=0.03% B. Both are fitted to each other and are sintered, whereby intended iron-copper-base sintered parts are obtained. In other words, the former expands on progression of sintering for the characteristics of the iron-copper- type green compact, but the latter shrinks by suppressing the copper expansion phenomenon by the effect of B. Since the sintering progresses while the joining surfaces of both are held in tight contact with each other, the iron-copper sintered parts which are firmly joined to one vody are obtained. |
