哈氏C-276合金纤维毡烧结工艺研究

Study on sintering process of hastelloy C-276 fiber felt

以集束拉拔法生产的C-276合金纤维为原料,经过纤维剪切、湿法成网、叠配毡等工序制备出纤维毡坯料,按照正交法设计出的实验方案,采用真空加压烧结法制备出C-276合金纤维毡样品,研究了烧结温度、保温时间及加压压力对纤维毡泡点压力损失率的影响。结果表明:烧结温度是影响泡点压力损失率的最显著因素;哈氏C-276合金纤维毡的最佳烧结工艺是烧结温度1 150℃,保温4.5 h,加压0.8 k Pa。

Hastelloy C-276 fiber made by bundle-drawing was employed as raw material,and then the fiber felt blank was prepared through shearing fiber,preparing mesh by wet method and superposing mesh. According to orthogonal experiments,the hastelloy C-276 fiber felt samples were prepared by vacuum pressure sintering. The effect of sintering temperature,holding time and pressure on the loss rate of bubble point pressure was studied. The results show that sintering temperature is the most significant factor influencing the loss rate of bubble point pressure. The optimum sintering process for hastelloy C- 276 fiber felt is sintering temperature of 1 150 ℃,holding time of 4.5 hours and pressure of 0.8 k Pa.