论文部分内容阅读
本文考察了无包套热等静压对于合金90W-7Ni-3Fe机械性能的影响以及断裂模式和机械性能之间的关系。亚固相线热等静压使具有低延伸率(<10％)烧结试样的延性显著改善(为原来的3倍)。对于具有延伸率20～25％的烧结试样,则可以在一定程度上予以改善(为原来的1.3～1.4倍)。本文探讨了热等静压对于重合金作用的机制。机械性能的改进主要归因于氢含量的降低和基体-钨晶粒间界结合强度的提高,这是通过与氩热处理以及真空热处理的对比而确定的。
This article examines the impact of uncoated hot isostatic pressing on the mechanical properties of alloy 90W-7Ni-3Fe and the relationship between fracture mode and mechanical properties. Sub-solidus hot isostatic pressing significantly improved the ductility of the sintered samples with low elongation (<10%) (three times the original). For a sintered sample with an elongation of 20-25%, this can be somewhat improved (1.3-1.4 times as much). This article explores the mechanism of hot isostatic pressing on alloying. The improvement of mechanical properties is mainly attributed to the decrease of hydrogen content and the increase of the interfacial bonding strength between matrix and tungsten grains, which is determined by comparison with argon heat treatment and vacuum heat treatment.