采用适当热等静压工艺处理铸造高温合金,利用高温高压实现铸件内部疏松孔洞的蠕变扩散,达到闭合疏松和均匀合金组织的目的,使铸造高温合金的综合力学性能,尤其是疲劳性能、塑性及合金力学性能的稳定性显著提高,大大提高了铸件使用的安全性和可靠性.介绍了热等静压工艺处理高温合金铸件的致密化原理、工艺因素及其对合金组织和性能的影响,同时概述了热等静压技术的应用成果及发展状况.
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