锻件组织不均匀性对新型近β钛合金组织与力学性能的影响
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摘要
研究一种新型β钛合金在两相区锻造后,边部、1/2R、心部组织的不均匀性对后续热处理组织性能的影响。结果表明:合金经750℃固溶后,3个位置组织中的初生α相分布不同,经800℃固溶后,β相发生不同程度的再结晶。合金经750℃+(510℃,8 h)固溶时效后,边部和1/2R处的组织出现"β斑"现象;合金经800℃+510℃,8 h固溶时效后,1/2R处和心部次生α相的析出存在明显的不均匀性。时效过程中组织的不均匀性导致合金3个位置强度和断裂韧性各不相同。在(750℃,0.5 h,AC)+(510℃,8 h,AC)固溶时效条件下,合金1/2R处的综合性能实现了高强高韧的良好匹配。
The influence of inhomogeneity of original microstructures including edge, 1/2R and core of a new β titanium alloy via α+β forging process on microstructures and mechanical properties following heat treatments were investigated. The results show that the distribution of primary α phase in three locations was nonuniform after the alloy solution-treated at 750 ℃, and at 800 ℃, different degree of recrystallization occurred within β phase. The alloy solution-treated at 750 ℃ followed by aging at 510 ℃ for 8 h, the microstructure with beta fleck happened in edge and 1/2R. Under the same aging condition, when the solution treatment was taken at 800 ℃, the secondary α phase with obviously uneven distribution precipitates in 1/2R and core. This inhomogeneity of microstructures during aging treatments results in different mechanical properties both of strength and fracture toughness in three locations. The alloys treated at(750 ℃, 0.5 h, AC)+(510 ℃, 8 h, AC) acquires good strength-toughness match, and high strength and high toughness of alloy at the location of 1/2R reaches the well match of high strength and high toughness.
The influence of inhomogeneity of original microstructures including edge, 1/2R and core of a new β titanium alloy via α+β forging process on microstructures and mechanical properties following heat treatments were investigated. The results show that the distribution of primary α phase in three locations was nonuniform after the alloy solution-treated at 750 ℃, and at 800 ℃, different degree of recrystallization occurred within β phase. The alloy solution-treated at 750 ℃ followed by aging at 510 ℃ for 8 h, the microstructure with beta fleck happened in edge and 1/2R. Under the same aging condition, when the solution treatment was taken at 800 ℃, the secondary α phase with obviously uneven distribution precipitates in 1/2R and core. This inhomogeneity of microstructures during aging treatments results in different mechanical properties both of strength and fracture toughness in three locations. The alloys treated at(750 ℃, 0.5 h, AC)+(510 ℃, 8 h, AC) acquires good strength-toughness match, and high strength and high toughness of alloy at the location of 1/2R reaches the well match of high strength and high toughness.
引文
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[16]王涛,郭鸿镇,王彦伟,姚泽坤.热处理对TG6合金热模锻件组织不均匀性的影响[J].中国有色金属学报,2010,20(S1):s593-s597.WANG Tao,GUO Hong-zhen,WANG Yan-wei,YAO Ze-kun.Effect of heat treatment on microstructural inhomogeneity of TG6 alloy hot die forgings[J].The Chinese Journal of Nonferrous Metals,2010,20(S1):s593-s597.
[17]费跃,朱知寿,王新南,李军,商国强,祝力伟.锻造工艺对新型低成本钛合金组织和性能影响[J].稀有金属,2013,37(2):186-191.FEI Yue,ZHU Zhi-shou,WANG Xin-nan,LI Jun,SHANG Guo-qiang,ZHU Li-wei.Influence of forging process on microstructure and mechanical properties of a new low-cost titanium alloy[J].Chinese Journal of Rare Metals,2013,37(2):186-191.
[18]XU Xin,DONG Li-min,BA Hong-bo,ZHANG Zhi-qiang,YANG Rui.Hot deformation behavior and microstructural evolution of beta C titanium alloy inβphase field[J].Transactions of Nonferrous Metals Society of China,2016,26(11):2874-2882.
[19]LI Dong,HUI Song-xiao,YE Wen-jun,LI Cheng-lin.Microstructure and mechanical properties of a new high-strength and high-toughness titanium alloy[J].Rare Metals,2016:1-7.
[20]王庆娟,高颀,王快社,王鼎春,李献民,丁长勤,杨奇.一种多元合金复合强化高强钛合金及其制备方法:中国,ZL201310040063.5[P].2013-05-22.WANG Qing-juan,GAO Qi,WANG Kuai-she,WANG Ding-chun,LI Xian-min,DING Chang-qin,YANG Qi.Multi-component alloy composite reinforced high-strength titanium alloy and preparation method thereof:China,ZL201310040063.5[P].2013-05-22.
[21]毛小南,张鹏省,于兰兰,袁少冲.BT22合金的成分设计和淬透性的关系研究[J].稀有金属快报,2006,25(6):21-26.MAO Xiao-nan,ZHANG Peng-sheng,YU Lan-lan,YUAN Shao-chong.Relationship study between the component design and quenching degree for BT22 alloy[J].Rare Metals Letters,2006,25(6):21-26.
[22]ZENG W D,ZHOU Y G.Effect of beta flecks on mechanical properties of Ti-10V-2Fe-3Al alloy[J].Materials Science and Engineering A,1999,260(1/2):203-211.
[23]LI Hui-min,LI Miao-quan,LUO Jiao,WANG Ke.Microstructure and mechanical properties of heat-treated Ti-5Al-2Sn-2Zr-4Mo-4Cr[J].Transactions of Nonferrous Metals Society of China,2015,25(9):2893-2900.
[24]张平辉,李成林,惠松骁,王韦琪,羊玉兰.固溶处理对Ti-6Cr-5Mo-5V-4Al合金组织与性能的影响[J].稀有金属,2011,35(5):639-643.ZHANG Ping-hui,LI Cheng-lin,HUI Song-xiao,WANG Wei-qi,YANG Yu-lan.Effect of solution treatment on microstructure and tensile properties of Ti-6Cr-5Mo-5V-4Al alloy[J].Chinese Journal of Rare Metals,2011,35(5):639-643.
[25]WANG Zhen-guo,CAI Hai-jiao,HUI Song-xiao.Microstructure and mechanical properties of a novel Ti-Al-Cr-Fe titanium alloy after solution treatment[J].Journal of Alloys and Compounds,2015,640:253-259.
[26]邹丽娜.高强高韧Ti-Al-Fe-V-(Mo,Cr)系合金显微组织与力学性能研究[D].北京:北京有色金属研究总院,2014.ZHOU Li-na.Study on the microstructure and mechanical properties of Ti-Al-Fe-V-(Mo,Cr)system alloys[D].Beijing:General Research Institute for Nonferrous Metals,2014.
[27]SHI Xiao-hui,ZENG Wei-dong,SHI Chun-ling,WANG Hao-jun,JIA Zhi-qiang.The fracture toughness and its prediction model for Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy with basket-weave microstructure[J].Journal of Alloys and Compounds,2015,632:748-755.
[2]SCHWAB H,PALM F,K HN U,ECKERT J.Microstructure and mechanical properties of the near-beta titanium alloy Ti-5553processed by selective laser melting[J].Materials and Design,2016,105:75-80.
[3]ELIAS C N,FERNANDES D J,RESENDE C R,ROESTEL J.Mechanical properties,surface morphology and stability of a modified commercially pure high strength titanium alloy for dental implants[J].Dental Materials,2015,31(2):e1-e13.
[4]MOCHIZUKI H,YOKOTA M,HATTORI S.Effects of materials and solution temperatures on cavitation erosion of pure titanium and titanium alloy in seawater[J].Transactions of the Japan Society of Mechanical Engineers A,2007,262(5/6):522-528.
[5]刘奇先,刘杨,高凯.钛合金的研究进展与应用[J].航天制造技术,2011(4):45-48,55.LIU Qi-xian,LIU Yang,GAO Kai.Research progress and application of titanium alloys[J].Aerospace Manufacturing Technology,2011(4):45-48,55.
[6]曹春晓.航空用钛合金的发展概况[J].航空科学技术,2005(4):3-6.CAO Chun-xiao.General development situation of titanium alloys for aviation[J].Aeronautical Science and Technology,2005(4):3-6.
[7]黄张洪,曲恒磊,邓超,杨建朝.航空用钛及钛合金的发展及应用[J].材料导报,2011,25(1):102-107.HUANG Zhang-hong,QU Heng-lei,DENG Chao,YANG Jian-chao.Development and application of aerial titanium and its alloys[J].Materials Review,2011,25(1):102-107.
[8]赵丹丹.钛合金在航空领域的发展与应用[J].铸造,2014,63(11):1114-1117.ZHAO Dan-dan.Development and application of titanium alloys in the aviation[J].Foundry,2014,63(11):1114-1117.
[9]吕逸帆,孟祥军,李世凯.TB6合金β斑研究概述[J].稀有金属材料与工程,2008,37(增刊3):544-547.LüYi-fan,MENG Xiang-jun,LI Shi-kai.An overview ofβfleck in TB6 alloy[J].Rare Metal Materials and Engineering,2008,37(S3):544-547.
[10]曲恒磊,周廉,周义刚,赵永庆,曾卫东,冯亮,李辉,陈军,张颖楠,郭红超.高强韧钛合金评述[J].稀有金属快报,2004,23(10):5-9.QU Heng-lei,ZHOU Lian,ZHOU Yi-gang,ZHAO Yong-qing,ZENG Dong-wei,FENG Liang,LI Hui,CHEN Jun,ZHANG Ying-nan,GUO Hong-chao.Review of high-strength and high-toughness titanium alloys[J].Rare Metals Letters,2004,23(10):5-9.
[11]PETERS J O,L TJERING G.Comparison of the fatigue and fracture ofα+βandβtitanium alloys[J].Metallurgical and Materials Transactions A,2001,32(11):2805-2818.
[12]商国强,朱知寿,常辉,王新南,寇宏超,李金山.超高强度钛合金研究进展[J].稀有金属,2011,35(2):286-291.SHANG Guo-qiang,ZHU Zhi-shou,CHANG Hui,WANG Xin-nan,KOU Hong-chao,LI Jing-shan.Development of ultra-high strength titanium alloy[J].Chinese Journal of Rare Metals,2011,35(2):286-291.
[13]杨冬雨,付艳艳,惠松骁,叶文君,于洋,梁恩泉.高强高韧钛合金研究与应用进展[J].稀有金属,2011,35(4):575-580.YANG Dong-yu,FU Yan-yan,HUI Song-xiao,YE Wen-jun,YU Yang,LIANG En-quan.Research and application of high strength and high toughness titanium alloys[J].Chinese Journal of Rare Metals,2011,35(4):575-580.
[14]雷锦文,曾卫东,吴欢,杜予暄,唐晓东,庾高峰,周义刚,张奕.热机械处理对Ti-10V-2Fe-3Al钛合金组织和性能的影响[J].中国有色金属学报,2010,20(S1):s602-s605.LEI Jin-wen,ZENG Wei-dong,WU Huan,DU Yu-xuan,TANG Xiao-dong,YU Gao-feng,ZHOU Yi-gang,ZHANG Yi.Effects of mechanical heat-treatment on microstructure and properties of Ti-10V-2Fe-3Al alloy[J].The Chinese Journal of Nonferrous Metals,2010,20(S1):s602-s605.
[15]ZAFARI A,DING Y,CUI J,XIA K.Achieving fine beta grain structure in a metastable beta titanium alloy through multiple forging-annealing cycles[J].Metallurgical and Materials Transactions A,2016,47(7):3633-3648.
[16]王涛,郭鸿镇,王彦伟,姚泽坤.热处理对TG6合金热模锻件组织不均匀性的影响[J].中国有色金属学报,2010,20(S1):s593-s597.WANG Tao,GUO Hong-zhen,WANG Yan-wei,YAO Ze-kun.Effect of heat treatment on microstructural inhomogeneity of TG6 alloy hot die forgings[J].The Chinese Journal of Nonferrous Metals,2010,20(S1):s593-s597.
[17]费跃,朱知寿,王新南,李军,商国强,祝力伟.锻造工艺对新型低成本钛合金组织和性能影响[J].稀有金属,2013,37(2):186-191.FEI Yue,ZHU Zhi-shou,WANG Xin-nan,LI Jun,SHANG Guo-qiang,ZHU Li-wei.Influence of forging process on microstructure and mechanical properties of a new low-cost titanium alloy[J].Chinese Journal of Rare Metals,2013,37(2):186-191.
[18]XU Xin,DONG Li-min,BA Hong-bo,ZHANG Zhi-qiang,YANG Rui.Hot deformation behavior and microstructural evolution of beta C titanium alloy inβphase field[J].Transactions of Nonferrous Metals Society of China,2016,26(11):2874-2882.
[19]LI Dong,HUI Song-xiao,YE Wen-jun,LI Cheng-lin.Microstructure and mechanical properties of a new high-strength and high-toughness titanium alloy[J].Rare Metals,2016:1-7.
[20]王庆娟,高颀,王快社,王鼎春,李献民,丁长勤,杨奇.一种多元合金复合强化高强钛合金及其制备方法:中国,ZL201310040063.5[P].2013-05-22.WANG Qing-juan,GAO Qi,WANG Kuai-she,WANG Ding-chun,LI Xian-min,DING Chang-qin,YANG Qi.Multi-component alloy composite reinforced high-strength titanium alloy and preparation method thereof:China,ZL201310040063.5[P].2013-05-22.
[21]毛小南,张鹏省,于兰兰,袁少冲.BT22合金的成分设计和淬透性的关系研究[J].稀有金属快报,2006,25(6):21-26.MAO Xiao-nan,ZHANG Peng-sheng,YU Lan-lan,YUAN Shao-chong.Relationship study between the component design and quenching degree for BT22 alloy[J].Rare Metals Letters,2006,25(6):21-26.
[22]ZENG W D,ZHOU Y G.Effect of beta flecks on mechanical properties of Ti-10V-2Fe-3Al alloy[J].Materials Science and Engineering A,1999,260(1/2):203-211.
[23]LI Hui-min,LI Miao-quan,LUO Jiao,WANG Ke.Microstructure and mechanical properties of heat-treated Ti-5Al-2Sn-2Zr-4Mo-4Cr[J].Transactions of Nonferrous Metals Society of China,2015,25(9):2893-2900.
[24]张平辉,李成林,惠松骁,王韦琪,羊玉兰.固溶处理对Ti-6Cr-5Mo-5V-4Al合金组织与性能的影响[J].稀有金属,2011,35(5):639-643.ZHANG Ping-hui,LI Cheng-lin,HUI Song-xiao,WANG Wei-qi,YANG Yu-lan.Effect of solution treatment on microstructure and tensile properties of Ti-6Cr-5Mo-5V-4Al alloy[J].Chinese Journal of Rare Metals,2011,35(5):639-643.
[25]WANG Zhen-guo,CAI Hai-jiao,HUI Song-xiao.Microstructure and mechanical properties of a novel Ti-Al-Cr-Fe titanium alloy after solution treatment[J].Journal of Alloys and Compounds,2015,640:253-259.
[26]邹丽娜.高强高韧Ti-Al-Fe-V-(Mo,Cr)系合金显微组织与力学性能研究[D].北京:北京有色金属研究总院,2014.ZHOU Li-na.Study on the microstructure and mechanical properties of Ti-Al-Fe-V-(Mo,Cr)system alloys[D].Beijing:General Research Institute for Nonferrous Metals,2014.
[27]SHI Xiao-hui,ZENG Wei-dong,SHI Chun-ling,WANG Hao-jun,JIA Zhi-qiang.The fracture toughness and its prediction model for Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy with basket-weave microstructure[J].Journal of Alloys and Compounds,2015,632:748-755.