综述了粉末冶金钛合金致密化工艺及致密化机理研究的新进展.粉末冶金钛合金致密化工艺除采用传统的热等静压工艺外,注射成型、激光成型等新技术的应用可以得到相对密度达99%的烧结件,其拉伸性能达到甚至超过熔锻钛合金的水平;致密化理论方面的研究除扩散、蠕变及屈服机制外,钛合金中还有相变致密化机制与多组元合金元素的强化致密化机制.其中当粉末钛合金在α/β两相区温度下进行循环热压时,相变致密化起主要作用.当多组元粉末钛合金烧结时,促进液相形成或提供扩散通道的合金元素起强化致密化作用.这两种致密化机制在粉末钛合金烧结的实际应用中有重要意义.
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