摘要
采用冷等静压、烧结的方法制备了钼棒坯,对钼棒进行了旋锻和挤压处理,得到了一种高抗拉强度钼棒,并探讨了旋锻工艺和挤压工艺对材料组织结构以及性能的影响。结果表明:采用加热温度为1300~1350℃,道次压缩量30%,总压缩量150%的旋锻工艺可获得相对密度98%以上的钼棒。旋锻对钼棒具有较好的致密化效果。旋锻后的材料抗拉强度和伸长率均随变形量增大而提高。经旋锻热变形后钼材的组织结构均匀、晶粒为等轴状晶粒、垂直于长度方向的平均晶粒度小于5μm、室温抗拉强度大于610 MPa。经挤压变形致密后钼材的组织结构均匀、晶粒呈纤维状,内部组织形成初步的具一定长宽比的加工织构,室温抗拉强度大于810 MPa。热处理制度为850℃/60 min退火消除热加工过程造成的残余应力,加工织构得以保存,性能最好。
The molybdenum rods billet was prepared by cold isostatic pressing and sintering.The high tensile strength molybdenum rod was stained by rotary swaging and extrusion processing.The effect on microstructure and performance by rotary swaging and extrusion processing was explored.The results showed that the rotary swaging using heating temperature at 1300~1350 ℃,a compression at 30 percents and total compressions at 150 percents obtained the molybdenum rod and its relative density was more than 98 percents.The...
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2010年第5期684-688,共5页
Chinese Journal of Rare Metals
关键词
纯钼
旋锻
挤压
组织
抗拉强度
pure molybdenum
rotary swaging
extrusion processing
microstructures
tensile strength
