Sintering.Behavior of Tungsten Heavy Alloys with High Ni/Fe Ratios
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摘要: 研究了鎢質量分數為90%的高Ni/Fe比W-Ni-Fe系重合金在不同工藝參數(燒結溫度、燒結時間等)下的燒結行為.研究結果表明:在相同燒結條件下,隨粘結相中NiNe比增加鎢合金燒結密度增加,致密化速率提高,同時燒結過程中W晶粒生長速率增大:當Ni/Fe比較低時,鎢合金在循環燒結條件下難以實現完全致密化;但對高Ni/Fe比鎢合金,循環燒結不僅可以獲得比等溫燒結更高的燒結密度,而且還可以有效地控制燒結過程中W晶粒的長大,獲得細晶鎢合金.Abstract: 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.
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Key words:
- tungsten heavy alloy /
- Ni/Fe ratio /
- sintering behavior /
- circular sintering
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