摘要
对粉末冶金法制备的纯Mo及No-43wt％Re合金不同状态下的力学性能和显微组织变化研究，结果表明：No-43wt％Re合金较纯M0加工硬化显著，冷轧态纯Mo硬度仅为340HV，而No-43wt％Re合金的硬度达420HV。同时，Mo—43wt％Re合金抗高温软化性能较纯No得到显著提高，纯Mo的再结晶开始温度为900℃左右，Mo—43wt％Re合金在1350～1400℃开始再结晶，且再结晶晶粒细小，此时合金硬度较低，冷加工性能较好，可进行的最大变形量达50％。冷轧态No-43wt％Re合金出现大量位错胞组织，随着退火温度的升高，位错密度不断降低，且在不同温度下分别出现了均匀的螺位错网络和波浪形位错等组织。
The mechanical properties and microstructure of pure Mo and Mo-43wt% Re alloy prepared by powder metallurgy methods were studied. The results show that work-hardening ability of Mo-43wt% Re alloy is higher than that of pure Mo. The micro-hardness of cold-rolled Mo-43wt% Re alloy reaches 420HV and only 340HV for cold-rolled Mo can be obtained. The ability of resistance to softening at high temperatures for Mo- 43wt% Re alloy is better. The start recrystallization temperature of pure Mo is about 900℃, while the recrystallization of Mo-43wt% Re alloy starts at temperature of 1350℃ - 1400℃, and forms fine grain microstructure with lower hardness and better cold working property, the maximum reduction reaching 50%. Dislocation cells is observed in the cold-rolled Mo-43wt% Re alloy, and with the increase of annealing temperature, the density of dislocation decreases due to dislocation cross-gliding and climbing. A homogeneous screw dislocation net and wave dislocations can also be observed in the annealed Mo-43wt% Re alloy.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2007年第6期54-58,共5页
Transactions of Materials and Heat Treatment
基金
国家高新技术发展"863"计划资助项目(2006AA03Z517)
湖南省自然科学基金(05JJ30095)
关键词
钼铼合金
冷轧
退火
回复
再结晶
molybdenum-rhenium alloy
cold-rolling
annealing
recovery
recrystallization
