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以纳米93W-4.9Ni-2.1Fe合金粉末为原料,研究放电等离子烧结温度对钨合金组织和动态力学性能的影响。结果表明,采用放电等离子烧结方法可制备出组织均匀的细晶钨合金。当烧结温度在950～1400℃时,随着烧结温度的增加,钨颗粒平均尺寸由2μm增大到10μm,试样动态抗压强度随之降低;动态压缩过程中,烧结温度在1000～1200℃的试样塑性均较好,而当烧结温度超过1300℃时,试样的塑性很低,表现为明显的脆性状态。
The nano-93W-4.9Ni-2.1Fe alloy powder was used as raw material to study the effect of discharge plasma sintering temperature on the microstructure and dynamic mechanical properties of tungsten alloy. The results show that fine-grained tungsten alloy with uniform microstructure can be prepared by spark plasma sintering. When the sintering temperature is in the range of 950-1400 ℃, the average size of tungsten particles increases from 2μm to 10μm with the increase of the sintering temperature. The dynamic compressive strength of the samples decreases with the sintering temperature increasing. The sintering temperature is between 1000 and 1200 ℃ The plasticity of the sample is better, and when the sintering temperature exceeds 1300 ℃, the plasticity of the sample is very low, showing a marked brittle state.