时效处理对TC4钛合金微观组织和力学性能的影响
|
摘要
采用固溶后的TC4钛合金分别在450、500、550、600和650℃条件下进行时效处理,并通过金相观察、力学性能检测和断口形貌观察研究了时效处理对TC4钛合金的微观组织和力学性能的影响。结果表明,随着时效温度的升高,TC4钛合金的强度先升后降,在550℃达到最大值。金相观察发现,550℃时所得组织较为细小且析出相数量多,因此有较好的弥散强化效果。断口的宏观形态呈暗灰色,且观察不到放射区;同时在断口的微观形貌中可观察到清晰的韧窝,可以判断出其断裂机制为韧性断裂,这说明材料具有较好的塑性。综合可知,TC4钛合金经550℃时效处理可得良好的综合力学性能。
The effect of aging treatment at 450,500,550,600 and 650 ℃ on the microstructure and mechanical properties of solutiontreated TC4 titanium alloy was studied by metallographic observation,mechanical property test and fracture morphology examination. The results show that with the increase of aging temperature,the strength increases firstly and then decreases and reaches to the maximum value at 550 ℃. It is known from the metallographic examination that smaller particles and more precipitated phases can be found in the microstructure obtained at 550 ℃,so that the corresponding dispersion strengthening effect is stronger. The macro-morphology of the fracture is dark gray and no radiation area is observed. Clear dimples can be observed in the micro-morphology images of fracture,so that the fracture mechanism can be judged as ductile fracture,which indicates that the material has good plasticity. It is concluded that the TC4 titanium alloy can obtain good comprehensive mechanical properties after aging treatment at 550 ℃.
The effect of aging treatment at 450,500,550,600 and 650 ℃ on the microstructure and mechanical properties of solutiontreated TC4 titanium alloy was studied by metallographic observation,mechanical property test and fracture morphology examination. The results show that with the increase of aging temperature,the strength increases firstly and then decreases and reaches to the maximum value at 550 ℃. It is known from the metallographic examination that smaller particles and more precipitated phases can be found in the microstructure obtained at 550 ℃,so that the corresponding dispersion strengthening effect is stronger. The macro-morphology of the fracture is dark gray and no radiation area is observed. Clear dimples can be observed in the micro-morphology images of fracture,so that the fracture mechanism can be judged as ductile fracture,which indicates that the material has good plasticity. It is concluded that the TC4 titanium alloy can obtain good comprehensive mechanical properties after aging treatment at 550 ℃.
引文
[1]赵永庆.国内外钛合金研究的发展现状及趋势[J].中国材料进展,2010,29(5):1-8.Zhao Yongqing. Current situation and development trend of titanium alloys[J]. Materials China,2010,29(5):1-8.
[2]付艳艳,宋月清,惠松骁,等.航空用钛合金的研究与应用进展[J].稀有金属,2006,30(6):850-856.Fu Yanyan, Song Yueqing, Hui Songxiao, et al. Research and application of typical aerospace titanium alloys[J]. Chinese Journal of Rare Metals,2006,30(6):850-856.
[3]朱知寿.我国航空用钛合金技术研究现状及发展[J].航空材料学报,2014,34(4):44-50.Zhu Zhishou. Recent research and development of titanium alloys for aviation application in china[J]. Journal of Aeronautical Materials,2014,34(4):44-50.
[4]李哲,张德远,姜兴刚.钛合金旋转超声辅助钻削的出口毛刺[J].北京航空航天大学学报,2017,43(7):1380-1386.Li Zhe,Zhang Deyuan,Jiang Xinggang. Exit burr in rotary ultrasonicassisted drilling of titanium alloys[J]. Journal of Beijing University of Aeronautics and Astronautics,2017,43(7):1380-1386.
[5]肖虎,李亮. TC4钛合金在低温CO2冷却下的切削性能[J].中国机械工程,2017,28(8):883-887.Xiao Hu,Li Liang. High speed cutting of TC4 titanium alloy under cryogenic CO2cooling conditions[J]. China Mechanical Engineering,2017,28(8):883-887.
[6]侯智敏,赵永庆,曾卫东,等.热处理对TC21钛合金显微组织的影响[J].稀有金属材料与工程,2017,46(8):2087-2092.Hou Zhimin,Zhao Yongqing,Zeng Weidong,et al. Effect of heat treatment on the microstructure development of TC21alloy[J]. Rare Metal Materials and Engineering,2017,46(8):2087-2092.
[7]朱知寿,王新南,童路,等.新型TC21钛合金热处理工艺参数与显微组织演变的关系研究[J].钛工业进展,2006,23(6):24-27.Zhu Zhishou,Wang Xinnan,Tong Lu,et al. Study on the relationship between heat treatment parameters and microstructures evolvement of new type TC21 titanium alloy[J]. Titanium Industry Progress,2006,23(6):24-27.
[8]朱郎平,李建崇,莫晓飞,等.热处理对高温钛合金TG6铸造组织及性能的影响[J].钢铁钒钛,2017,38(1):43-47.Zhu Langping,Li Jianchong,Mo Xiaofei,et al. Effect of annealing on microstructure and tensile property of cast TG6 high-temperature Tibased alloy[J]. Iron Steel Vanadium Titanium,2017,38(1):43-47.
[9]贾百芳,杨义,葛鹏,等. TC18钛合金固溶时β晶粒的长大规律[J].机械工程材料,2011,35(12):71-73.Jia Baifang,Yang Yi,Ge Peng,et al.βgrain growth rule of TC18titanium alloy during solid-solution[J]. Materials for Mechanical Engineering,2011,35(12):71-73.
[10]陈志茹,计霞,楚瑞坤,等.热处理工艺对激光熔化沉积TC4钛合金组织性能的影响[J].金属热处理,2018,43(11):144-149.Chen Zhiru,Ji Xia,Chu Ruikun,et al. Effect of heat treatment on microstructure and properties of TC4 titanium alloy by laser melting deposition[J]. Heat Treatment of Metals, 2018, 43(11):144-149.
[11]王琛,徐栋,陈力.热处理对TC18钛合金组织和力学性能的影响[J].金属热处理,2018,43(9):186-190.Wang Chen, Xu Dong, Chen Li. Effect of heat treatment on microstructure and mechanical properties of TC18 titanium alloy[J].Heat Treatment of Metals,2018,43(9):186-190.
[12]何丹,王庆娟,高颀,等.新型β钛合金时效析出相的演变及硬化[J].稀有金属,2016,40(7):633-639.He Dan,Wang Qingjuan,Gao Qi,et al. Evolution and hardening of age-precipitated phases of newβtitanium alloy[J]. Chinese Journal of Rare Metals,2016,40(7):633-639.
[13]Bache M R. A review of dwell sensitive fatigue in titanium alloys:The role of microstructure, texture and operating conditions[J].International Journal of Fatigue,2003,25(9):1079-1087.
[14]王清江,刘建荣,杨锐.高温钛合金的现状与前景[J].航空材料学报,2014,34(4):1-26.Wang Qingjiang,Liu Jianrong,Yang Rui. High temperature titanium alloys:status and perspective[J]. Journal of Aeronautical Materials,2014,34(4):1-26.
[15]刘莹,曲周德,王本贤.钛合金TC4的研究开发与应用[J].兵器材料科学与工程,2005,28(1):47-50.Liu Ying,Qu Zhoude,Wang Benxian. Research development and application of Ti6Al4V alloy[J]. Ordnance Material Science and Engineering,2005,28(1):47-50.
[16]王悔改,冷文才,李双晓,等.热处理工艺对TC4钛合金组织和性能的影响[J].热加工工艺,2011,40(10):181-183.Wang Huigai,Leng Wencai,Li Shuangxiao,et al. Effects of heat treatment process on microstructure and mechanical properties of TC4 alloy[J]. Hot Working Technology, 2011, 40(10):181-183.
[2]付艳艳,宋月清,惠松骁,等.航空用钛合金的研究与应用进展[J].稀有金属,2006,30(6):850-856.Fu Yanyan, Song Yueqing, Hui Songxiao, et al. Research and application of typical aerospace titanium alloys[J]. Chinese Journal of Rare Metals,2006,30(6):850-856.
[3]朱知寿.我国航空用钛合金技术研究现状及发展[J].航空材料学报,2014,34(4):44-50.Zhu Zhishou. Recent research and development of titanium alloys for aviation application in china[J]. Journal of Aeronautical Materials,2014,34(4):44-50.
[4]李哲,张德远,姜兴刚.钛合金旋转超声辅助钻削的出口毛刺[J].北京航空航天大学学报,2017,43(7):1380-1386.Li Zhe,Zhang Deyuan,Jiang Xinggang. Exit burr in rotary ultrasonicassisted drilling of titanium alloys[J]. Journal of Beijing University of Aeronautics and Astronautics,2017,43(7):1380-1386.
[5]肖虎,李亮. TC4钛合金在低温CO2冷却下的切削性能[J].中国机械工程,2017,28(8):883-887.Xiao Hu,Li Liang. High speed cutting of TC4 titanium alloy under cryogenic CO2cooling conditions[J]. China Mechanical Engineering,2017,28(8):883-887.
[6]侯智敏,赵永庆,曾卫东,等.热处理对TC21钛合金显微组织的影响[J].稀有金属材料与工程,2017,46(8):2087-2092.Hou Zhimin,Zhao Yongqing,Zeng Weidong,et al. Effect of heat treatment on the microstructure development of TC21alloy[J]. Rare Metal Materials and Engineering,2017,46(8):2087-2092.
[7]朱知寿,王新南,童路,等.新型TC21钛合金热处理工艺参数与显微组织演变的关系研究[J].钛工业进展,2006,23(6):24-27.Zhu Zhishou,Wang Xinnan,Tong Lu,et al. Study on the relationship between heat treatment parameters and microstructures evolvement of new type TC21 titanium alloy[J]. Titanium Industry Progress,2006,23(6):24-27.
[8]朱郎平,李建崇,莫晓飞,等.热处理对高温钛合金TG6铸造组织及性能的影响[J].钢铁钒钛,2017,38(1):43-47.Zhu Langping,Li Jianchong,Mo Xiaofei,et al. Effect of annealing on microstructure and tensile property of cast TG6 high-temperature Tibased alloy[J]. Iron Steel Vanadium Titanium,2017,38(1):43-47.
[9]贾百芳,杨义,葛鹏,等. TC18钛合金固溶时β晶粒的长大规律[J].机械工程材料,2011,35(12):71-73.Jia Baifang,Yang Yi,Ge Peng,et al.βgrain growth rule of TC18titanium alloy during solid-solution[J]. Materials for Mechanical Engineering,2011,35(12):71-73.
[10]陈志茹,计霞,楚瑞坤,等.热处理工艺对激光熔化沉积TC4钛合金组织性能的影响[J].金属热处理,2018,43(11):144-149.Chen Zhiru,Ji Xia,Chu Ruikun,et al. Effect of heat treatment on microstructure and properties of TC4 titanium alloy by laser melting deposition[J]. Heat Treatment of Metals, 2018, 43(11):144-149.
[11]王琛,徐栋,陈力.热处理对TC18钛合金组织和力学性能的影响[J].金属热处理,2018,43(9):186-190.Wang Chen, Xu Dong, Chen Li. Effect of heat treatment on microstructure and mechanical properties of TC18 titanium alloy[J].Heat Treatment of Metals,2018,43(9):186-190.
[12]何丹,王庆娟,高颀,等.新型β钛合金时效析出相的演变及硬化[J].稀有金属,2016,40(7):633-639.He Dan,Wang Qingjuan,Gao Qi,et al. Evolution and hardening of age-precipitated phases of newβtitanium alloy[J]. Chinese Journal of Rare Metals,2016,40(7):633-639.
[13]Bache M R. A review of dwell sensitive fatigue in titanium alloys:The role of microstructure, texture and operating conditions[J].International Journal of Fatigue,2003,25(9):1079-1087.
[14]王清江,刘建荣,杨锐.高温钛合金的现状与前景[J].航空材料学报,2014,34(4):1-26.Wang Qingjiang,Liu Jianrong,Yang Rui. High temperature titanium alloys:status and perspective[J]. Journal of Aeronautical Materials,2014,34(4):1-26.
[15]刘莹,曲周德,王本贤.钛合金TC4的研究开发与应用[J].兵器材料科学与工程,2005,28(1):47-50.Liu Ying,Qu Zhoude,Wang Benxian. Research development and application of Ti6Al4V alloy[J]. Ordnance Material Science and Engineering,2005,28(1):47-50.
[16]王悔改,冷文才,李双晓,等.热处理工艺对TC4钛合金组织和性能的影响[J].热加工工艺,2011,40(10):181-183.Wang Huigai,Leng Wencai,Li Shuangxiao,et al. Effects of heat treatment process on microstructure and mechanical properties of TC4 alloy[J]. Hot Working Technology, 2011, 40(10):181-183.