摘要
水冷温度影响TC4钛合金的组织形态与力学性能的变化。TC4钛合金固溶后缓慢冷却到3种不同温度。水冷后组织形态与力学性能的变化结果表明:当由900℃开始水冷时,α相在晶界形核,原始的β晶粒出现;当温度继续降低达700℃然后再水冷时,析出α相相对均匀细小,试样抗拉强度和硬度分别达到了最高值867MPa和HV5218;随着冷却温度的继续下降,β相逐渐析出α相,水冷温度越低,α相呈现为粗大的片层状,试样强度和硬度降低。
Water cooling temperature affects morphologies and mechanical properties of TC4 alloy. TC4 alloy was water cooled from 3 different temperatures after solution treating. The results show that the original β-grain and α-phase were observed when the specimens were water cooled at 900℃ after solid solution. A uniformly fine-grained structure of a-phase was observed when the specimens were water cooled at 700℃. The tensile strength and hardness of specimens exhibited the maximum value （867MPa and HV5218）, respectively. More α-phases were precipitated from β-phases with decreasing water cooling temperature. The tensile strength and hardnesses of the specimens decreased due to coarse lamellar α-phase.
出处
《航空制造技术》
2017年第1期103-105,共3页
Aeronautical Manufacturing Technology
基金
国家863科研项目(2015AA03A501)
东北大学国家重点实验室开放课题(12SYS05)
关键词
TC4钛合金
水冷温度
相
力学性能
TC4 alloy
Water cooling temperature
Phases
Mechanical properties
