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研究了粘结相的成分Ni和Cu的变化对液相烧结Mo W Ni Cu合金性能的影响。结果发现 ,随镍铜量或镍铜比的增加 ,烧结温度下降 ,合金的晶粒球化、细化。当镍铜比一定 ,合金的抗拉强度随镍铜量的增加先是急剧上升 ,然后缓慢下降。当镍铜量一定 ,抗拉强度随镍铜比的增加亦有上述关系。当镍铜比为 2 4 ,镍铜量为 6% ,烧结温度不低于 1380℃时 ,液相烧结钼基合金几乎无孔隙 ,抗拉强度可达 110 0MPa ,晶粒呈鹅卵石状
The effects of Ni and Cu contents on the properties of liquid-phase sintered Mo W Ni Cu alloys were investigated. The results show that with the increase of the amount of nickel or nickel-copper ratio, the sintering temperature decreases and the grains of the alloy are spheroidized and refined. When the nickel-copper ratio is constant, the tensile strength of the alloy increases sharply with the increase of the nickel-copper content, and then slowly decreases. When a certain amount of nickel copper, tensile strength with the increase of nickel-copper ratio also have the above relationship. When the ratio of nickel to copper is 2 4, the amount of nickel and copper is 6% and the sintering temperature is not lower than 1380 ℃, the liquid-phase sintered molybdenum-based alloy has almost no porosity, the tensile strength can reach 110 0MPa and the grains are pebble