碳氧含量对93W-5Ni-2Fe钨合金冲击性能的影响

Effects of carbon and oxygen impurities on impact property of93W-5Ni-2Fe tungsten alloy

采用真空液相烧结制备了不同碳氧杂质含量的93W-5Ni-2Fe合金试样,研究了碳氧杂质含量对合金冲击性能的影响。结果表明,压坯在真空高温烧结过程中,原料中自身含有的碳具有较强的脱氧能力,通过碳氧平衡反应可减少合金中碳氧含量。碳氧杂质含量较高时,合金中存在较大尺寸的碳氧非金属夹杂物,合金的冲击性能较差。降低碳氧杂质含量可减小或避免碳氧夹杂物的生成,有利于提高钨合金的冲击性能。

93W-5Ni-2Fe alloys with different content of carbon and oxygen were prepared by vacuum liquid phase sintering,and the effects of carbon and oxygen impurities on the impact properties of the alloys were investigated. The results show that carbon contained in the raw material has a strong deoxidizing power in the vacuum high temperature sintering process,and the carbon and oxygen content in the alloys can be reduced by the carbon-oxygen equilibrium reaction. When the content of carbon and oxygen impurities is high,carbon-oxygen nonmetallic impurities in large size can be found in the tungsten alloy and the impact properties of the alloy is poor. The reduction of the carbon and oxygen impurities content can reduce or avoid the formation of carbon and oxygen impurities,which is helpful to improve the impact properties of the tungsten alloy.