摘要
采用多物理场活化烧结微成形技术(Micro-FAST)快速制备TC4微型圆柱,研究烧结温度对TC4微型圆柱的致密化过程及力学性能的影响。研究发现,Micro-FAST技术可在5 min内实现TC4的快速成形,在900~1200℃的烧结温度区间均可获得相对密度大于97%的微型圆柱件,其显微组织由条状α相和β相组成,组织分布均匀、晶粒细小。当烧结温度为1000℃时,硬度达到最大值380.3HV0.5,较传统方法制备的TC4零件硬度提高10%。随着烧结温度的提高,烧结体中出现魏氏组织,合金的韧性逐渐降低。
The rapid preparation of TC4 micro-cylinder was realized by micro-forming fields activated sintering technology(Micro-FAST).The effect of sintering temperature on the densification process and mechanical properties of TC4 micro cylinders was studied.The results show that Micro-FAST can realize the rapid forming of TC4 micro cylinder parts with relative density greater than 97%at the sintering temperatures of 900?1200℃in 5 min.The microstructure is composed of stripαphase andβphase with the uniform distribution of the organization and fine grain.The TC4 alloy prepared by Micro-FAST has a maximum hardness of 380.3HV0.5 at the sintering temperature of 1000℃,which is 10%higher than that of TC4 parts prepared by traditional method.With increasing in sintering temperature,the sample is observed to appear the Widmanststten structure,the toughness of the alloy gradually reduces.
作者
吴秀丽
杨屹
杨刚
黄坤兰
韦辽
吴明霞
WU Xiu-li;YANG Yi;YANG Gang;HUANG Kun-lan;WEI Liao;WU Ming-xia(School of Manufacturing Science and Engineering,Sichuan University,Chengdu 610065,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2018年第10期2009-2015,共7页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(51675357
51705348)~~