宫波
,
赖祖涵
,
新家光雄
,
小林俊郎
金属学报
提出了一种新的细化α+β型钛合金显微组织的氢处理工艺:在合金的氢化β转变点以下0—40K的温度范围对合金渗氢处理,空冷至室温,最后在948K真空除氢。Ti-6Al-4V和Ti-5Al-2.5Fe合金经此工艺处理后,组织显著细化,屈服强度,拉伸强度及延伸率分别提高8—15％,5—13％,7—14％。
关键词:
Ti-6Al-4V
,
Ti-5Al-2.5Fe
,
hydrogen treatment
,
tensile property
L. Dong
,
L.G. Zhou
,
H. Ding and C.B. Zhang(Laboratory of Atomic Imaging of Solids
,
Institute of Metal Research
,
The Chinese Academy of Sciences
,
Shenyang 110015
,
China)(Departmeot of Material Science
,
Northeastern University
,
Shenyang 110006
,
China)
金属学报(英文版)
The ebct of hydrogenation-dehydrogenation on the microstructure of forping Ti-24Al14Nb-3V-0.5MO alloy was investigated by TEM and X-ray ddection. The resultsshowed that the microstructure consists of O and B2 phases as received materials, and tmoprmation of B2 phase to O phase can be eNctively promoted 6y hydrogenation. The lamellate γ hydride was found in O phase with more hydmpen content, and this γ hydride could be decomposed by dehydmpenation treatment. The sole fine Ophase could be obtained 6y hydmpenation-dehydmpenation treatment, and two possible mechanisms for the microstructure improvetnent have been discussed on the basis of experimental results.
关键词:
Ti_3Al-based alloy
,
null
,
null
