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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Effect of rolling and heat treatment on microstructure and
properties of Ti-26 sheet
ZHAO Bin(赵 彬), YANG Ying-li(杨英丽), GUO Di-zi(郭荻子),
SU Hang-biao(苏航标), YIN Jing-ou(殷京瓯)

Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China

Abstract:The effect of heat treatment and rolling process on the properties and microstructures of Ti-26 (Ti-15V-3Al-3Cr-3Sn-Forming) sheet was studied. The results show that the best rolling temperature for Ti-26 alloy is in the temperature range from 900 ℃ to 950℃. Under this condition, the resistance of deformation and yield ratio are low and the alloy has better hot work ability. The alloy will achieve better mechanical properties and completely recrystallized b microstructure when the deformation ratio is not less than 60% and the solution temperature is 30 ℃ above the phase transformation temperature. The best heat treatment conditions are recommended as: 790℃, 30 min, AC or WQ followed by 510 ℃, 10 h, AC. Under this heat treatment condition the strength of the Ti-26 alloy is 1 230 MPa and the elongation is 15%.

 

Key words: Ti-26 titanium alloys; sheet material; heat treatment; rolling processing

ISSN 1672-7029
CN 43-1423/U

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