深冷处理对TC6钛合金热导率和热膨胀系数的影响
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摘要
对TC6钛合金进行深冷处理,通过对比深冷处理前后合金在25～600℃范围内的热导率和热膨胀系数的变化,探讨了深冷处理对TC6钛合金热导率和热膨胀系数的影响。结果表明:随着温度升高,经深冷处理合金的热导率先小于后大于未经深冷处理合金的热导率,而热膨胀系数则先略大于后小于未经深冷处理合金的热膨胀系数。600℃时,经深冷处理合金的热导率和热膨胀系数分别为7.95 W·m~(-1)·K~(-1)和1.17×10~(-5)·℃~(-1),较相同温度下未经深冷处理的分别增大和减小了14.88%(1.03 W.m~(-1)·K~(-1))和1.62%(0.19×10~(-6)·℃~(-1))。
A cryogenic treatment test was carried on TC6 titanium alloy, the effects of cryogenic treatment on the thermal conductivity and thermal expansion coefficient of TC6 alloy under the temperature range of 25 ～ 600 ℃ were investigated.The results show that the thermal conductivity of the cryogenic treated alloy is first less and then greater than that of the original alloy; however, thermal expansion coefficient of TC6 alloy is first slightly greater and then less than that of the original alloy with the increase of temperature. When the temperature is up to 600 ℃, thermal conductivity and thermal expansion coefficient of the cryogenic treated TC6 alloy are 7.95 W·m~(-1)·K~(-1)and 1.17×10~(-5)℃~(-1), and increases and decreases by 14.88%(1.03 W·m~(-1)·K~(-1)) and 1.62%(0.19×10~(-6)℃~(-1)) respectively than that of the original alloy at the same temperature.
A cryogenic treatment test was carried on TC6 titanium alloy, the effects of cryogenic treatment on the thermal conductivity and thermal expansion coefficient of TC6 alloy under the temperature range of 25 ～ 600 ℃ were investigated.The results show that the thermal conductivity of the cryogenic treated alloy is first less and then greater than that of the original alloy; however, thermal expansion coefficient of TC6 alloy is first slightly greater and then less than that of the original alloy with the increase of temperature. When the temperature is up to 600 ℃, thermal conductivity and thermal expansion coefficient of the cryogenic treated TC6 alloy are 7.95 W·m~(-1)·K~(-1)and 1.17×10~(-5)℃~(-1), and increases and decreases by 14.88%(1.03 W·m~(-1)·K~(-1)) and 1.62%(0.19×10~(-6)℃~(-1)) respectively than that of the original alloy at the same temperature.
引文
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[10]陈丽萍,司乃潮.热处理对Cu ZnAl形状记忆合金热膨胀特性的影响[J].特种铸造及有色合金,2005,25(8):459-461.
[2] Nie X F, He W F, Zhou L C, et al. Experiment investigation of laser shock peening on TC6 titanium alloy to improve high cycle fatigue performance[J]. Materials Science and Engineering A, 2014,594:161-167.
[3]羊健.激光冲击强化对TC6钛合金疲劳性能的影响[J].铸造技术,2015,36(2):375-377.
[4] Chang Y P, Chou H M, Horng J H, et al. Effects of deep cryogenic treatment on tribological properties of the tool steel DC53[J]. Applied Mechanics and Materials, 2013, 311:477-481.
[5]曹栋,贾昭,谌岩.深冷处理对TC6钛合金高温抗压能力的影响[J].金属热处理,2017,42(2):160-162.
[6]杨伏良,甘卫平,陈招科.粉末粒度对高硅铝合金材料组织及性能的影响[J].材料科学与工艺,2006,14(3):268-271.
[7]张翥,王群骄,莫畏.钛的金属学和热处理[M].北京:冶金工业出版社,2009:62.
[8] Ma Y Q. Effects of 4 GPa pressure heat treatment on mechanical properties and electrical conductivity of CuCrNiAl alloy[J]. Materials Transactions, 2013,54(5):725-728.
[9]杨伏良,甘卫平,陈招科.挤压温度对高硅铝合金材料物理性能的影响[J].机械工程学报, 2006,42(6):7-10.
[10]陈丽萍,司乃潮.热处理对Cu ZnAl形状记忆合金热膨胀特性的影响[J].特种铸造及有色合金,2005,25(8):459-461.