陶瓷高速喷砂咀的研制

Investigation and manufacture of high speed ceramic spray nozzle

介绍了热压陶瓷高速喷砂咀的研制， 着重研究了在热压温度为１４５０ ～１５５０ ℃， 热压压力为１０ ～４０ ＭＰａ情况下材料的致密比， 以及密度由４ ．３０ ｇ／ｃｍ ３ 增加到４ ．６０ｇ／ｃｍ３ 时材料的硬度和强度的变化情况。结果发现，随着温度的升高和压力的增大， 材料的密度有规律地增加； 随着密度的增加， 材料的硬度和强度增加。研制的陶瓷喷砂咀产品的性能如下： 密度４ ．５０ ～４ ．６０ｇ／ｃｍ ３ ， 硬度ＨＲＡ９２ ～９４ ， 抗弯强度７００ ～９００ ＭＰａ ， 使用寿命１０００ ｈ

To deal with the high speed ceramic spray nozzle made by thermo pressing process, the densification of the nozzle material under the condition of 1 450～1 550 ℃ and 10～40 MPa pressure, and the hardness and strength of the material with 4.30～4.60 g/cm 3 density were investigated. The results show that the density of the material increases with the increase in thermo pressing temperature and pressure, and the hardness and strength of the material increase with the increase in the density. The characteristics of the nozzle are as follows: density 4.50～4.60 g/m 3, hardness HRA92-94, bending strength 700～900 MPa, and lifetime ≥1 000 h.