粉末冶金技术2026，Vol.44Issue(1)：145-151,7.DOI:10.19591/j.cnki.cn11-1974/tf.2025070002
烧结工艺对钨铼合金显微组织及力学性能的影响
Effect of sintering process on microstructure and mechanical properties of W-Re alloys
摘要
Abstract
The W-5.0Re-0.5HfC alloys were prepared by powder metallurgy,and the effects of three sintering processes on the microstructure and room-temperature mechanical properties of the alloys were systematically investigated,including hydrogen,vacuum,and vacuum+hydrogen sintering.The results indicate that the vacuum+hydrogen sintered billets exhibit the optimal comprehensive performance,with the average grain size(32.6 μm)and density(17.75 g·cm-3)intermediate between those of the hydrogen sintered(49.2 μm,18.42 g·cm-3)and vacuum sintered(12.4 μm,16.60 g·cm-3)billets,along with the optimal forging process adaptability.After the high-temperature deformation treatment,the room-temperature tensile strength of the vacuum+hydrogen sintered specimens(1425.11 MPa)is slightly lower than that of the hydrogen sintered specimens(1513.20 MPa),but the elongation significantly increases to 16.2％.The higher strength of the hydrogen sintered samples is attributed to the predominant presence of nano-sized hafnium carbide(HfC)particles through the dispersion strengthening mechanism.In contrast,the vacuum+hydrogen sintered specimens contain the hafnium oxide(HfO2)particles,tightly bonding to the matrix,effectively refining the grains,and coordinating the dislocation motion,which markedly improve the plastic deformation capability and result in the optimal balance between strength and ductility.关键词
钨铼合金/烧结工艺/纳米尺度/弥散强化/塑性变形Key words
W-Re alloys/sintering process/nanoscale/dispersion strengthening/plastic deformation分类
矿业与冶金引用本文复制引用
姚惠龙,王承阳,熊宁,常洋,张丹华..烧结工艺对钨铼合金显微组织及力学性能的影响[J].粉末冶金技术,2026,44(1):145-151,7.基金项目
国家重点研发计划(2022YFB3705400) （2022YFB3705400）
