高Ni/Fe比 W-Ni-Fe系重合金烧结行为

研究了钨质量分数为９０％的高Ｎｉ／Ｆｅ比Ｗ-Ｎｉ－Ｆｅ系重合金在不同工艺参数（烧结温度、 烧结时间等）下的烧结行为．研究结果表明：在相同烧结条件下，随粘结相中ＮｉＮｅ比增加钨合 金烧结密度增加，致密化速率提高，同时烧结过程中Ｗ晶粒生长速率增大：当Ｎｉ／Ｆｅ比较低时， 钨合金在循环烧结条件下难以实现完全致密化；但对高Ｎｉ／Ｆｅ比钨合金，循环烧结不仅可以获 得比等温烧结更高的烧结密度，而且还可以有效地控制烧结过程中Ｗ晶粒的长大，获得细晶 钨合金．

Sintering.Behavior of Tungsten Heavy Alloys with High Ni/Fe Ratios

The sintering behavior of tungsten heavy alloys with high Ni/Fe ratios was investigated. The results show that under the same sintering conditions, the sintered densities of the alloys and the growth rate of the tungsten grains increase with the increase of the Ni/Fe ratio. The tungsten heavy alloys with low Ni/Fe ratios are difficult to be densified by the circular sintering process. For the alloys with high Ni/Fe ratios, however, the circular sintering is a effective process to obtain a high density sintered and restrain the growth of tungsten grains during sintering.