纳米TiC/Ti细化剂加入量对铸态Al-Zn-Cu-Mg合金组织和性能的影响
|
摘要
采用高能球磨法制备金属Ti粉负载纳米TiC颗粒复合细化剂(TiC/Ti细化剂),研究细化剂加入量对铸态Al-Zn-Mg-Cu合金组织和性能的影响。结果表明:随着TiC/Ti细化剂加入量的增加,Al-Zn-Mg-Cu合金的晶粒尺寸逐渐减小;当加入量为0.5%(质量分数)时,晶粒形态由未添加细化剂时的525μm树枝晶转变为119.7μm的细等轴晶;随着细化剂加入量的增加,合金的晶粒尺寸逐渐粗化。铸态Al-Zn-Mg-Cu合金的第二相由T(AlZnMgCu)相和θ(Al_2Cu)相组成,晶粒细化使第二相细化、分散,但细化剂的添加并不改变第二相的组成。随着细化剂加入量的增加,合金的抗拉强度和维氏硬度升高;当细化剂加入量为0.5%时,合金的抗拉强度和硬度分别为249.5 MPa和137.3 HV,较未添加时的分别提高32.9%和16.4%。
A novel kind of Ti supporting nano-sized TiC particles grain refiner(TiC/Ti refiner) was prepared by high-energy ball milling.The effect of refiner addition amount on the microstructure and mechanical properties of as-cast Al-Zn-Mg-Cu alloy was investigated.The results show that with the increase addition of Ti C/Ti refiner,the average grain size of alloy decreases gradually.When the addition amount is 0.5%(mass fraction),the α(Al) grains transform from dendrites with average size of 525 μm to equiaxed grains with average size of 119.7 μm.The secondary phases of as-cast Al-Zn-Mg-Cu alloy consisted of T(AlZnMgCu) and θ(Al_2Cu).The refining of α(Al) grain results in fine and uniformly distributed secondary phases,while the composition has not been changed.The tensile strength and hardness increase with the Ti C/Ti refiner content;when the addition amount reaches to 0.5%,the optimized mechanical properties of the refined alloy is obtained with a tensile strength of 249.5 MPa and hardness of 137.3 HV.Compared to the unrefined alloy,the tensile strength and hardness are improved by 32.9% and 16.4%,respectively.
A novel kind of Ti supporting nano-sized TiC particles grain refiner(TiC/Ti refiner) was prepared by high-energy ball milling.The effect of refiner addition amount on the microstructure and mechanical properties of as-cast Al-Zn-Mg-Cu alloy was investigated.The results show that with the increase addition of Ti C/Ti refiner,the average grain size of alloy decreases gradually.When the addition amount is 0.5%(mass fraction),the α(Al) grains transform from dendrites with average size of 525 μm to equiaxed grains with average size of 119.7 μm.The secondary phases of as-cast Al-Zn-Mg-Cu alloy consisted of T(AlZnMgCu) and θ(Al_2Cu).The refining of α(Al) grain results in fine and uniformly distributed secondary phases,while the composition has not been changed.The tensile strength and hardness increase with the Ti C/Ti refiner content;when the addition amount reaches to 0.5%,the optimized mechanical properties of the refined alloy is obtained with a tensile strength of 249.5 MPa and hardness of 137.3 HV.Compared to the unrefined alloy,the tensile strength and hardness are improved by 32.9% and 16.4%,respectively.
引文
[1]黄进峰,杨滨,张济山.Al-Zn-Mg-Cu系超高强度铝合金的研究现状与发展趋势[J].材料导报,2003,17(9):1-4.HUANG Jin-feng,YANG Bin,ZHANG Ji-shan.Current status and future directions of ultrahigh strength Al-Zn-Mg-Cu aluminum alloys[J].Materials Review,2003,17(9):1-4.
[2]张纪帅,陈志国,任杰克.新型热机械处理对Al-Zn-Mg-Cu合金显微组织与性能的影响[J].中国有色金属学报,2015,25(4):910-917.ZHANG Ji-shuai,CHEN Zhi-guo,REN Jie-ke.Effect of new thermomechanical treatment on microstructure and properties of Al-Zn-Mg-Cu aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2015,25(4):910-917.
[3]刘吉东,曹志强,张红亮.熔体超声处理对Al-Zn-Mg-Cu铝合金铸态组织及成分偏析的影响[J].机械工程材料,2009,33(9):57-60.LIU Ji-dong,CAO Zhi-qiang,ZHANG Hong-liang.Effect of melt ultrasonic treatment on as-cast microstructure and component segregation of 7050 aluminum alloy[J].Materials for Mechanical Engineering,2009,33(9):57-60.
[4]LIU Guang-lei,SI Nai-chao,SUN Shao-chun.Effects of grain refining and modification on mechanical properties and microstructures of Al-7.5Si-4Cu cast alloy[J].Transactions Nonferrous Metals Society of China,2014,24(4):946-953.
[5]EASTON M,STJOHN D.Grain refinement of aluminum alloys:Part I.The nucleant and solute paradigms-a review of the literature[J].Metallurgical and Materials Transactions A,1999,30(6):1613-1623.
[6]朱正锋,兰晔峰.铝及合金晶粒细化研究现状及发展趋势[J].铸造设备研究,2004,26(2):51-54.ZHU Zheng-feng,LAN Ye-feng.The research about actuality and tendency on grain refinement of aluminum and alloys[J].Research Studies on Foundry Equipment,2004,26(2):51-54.
[7]肖政兵,邓运来,唐建国,陈祺,张新明.Al-Ti-C与Al-Ti-B晶粒细化剂的Zr中毒机理[J].中国有色金属学报,2012,22(2):371-378.XIAO Zheng-bing,DENG Yun-lai,TANG Jian-guo,CHEN Qi,ZHANG Xin-ming.Poisoning mechanism of Zr on grain refiner of Al-Ti-C and Al-Ti-B[J].The Chinese Journal of Nonferrous Metals,2012,22(2):371-378.
[8]QIU Ke,WANG Ri-chu,PENG Chao-qun.Effects of Mn and Sn on microstructure of Al-7Si-Mg alloy modified by Sr and Al-5Ti-B[J].Transactions Nonferrous Metals Society of China,2015,25(11):3546-3552.
[9]GREER A L,BUNN A M,TRONCHE A.Modelling of inoculation of metallic melts:application to grain refinement of aluminum by Al-Ti-B[J].Acta Materialia,2000,48(11):2823-2835.
[10]MYKHALENKOV K,LYSENKO S,REIF W.Application of Ti N particles for grain refinement of aluminum[J].Zeitschrift für Metallkunde,1999,90(9):664-668.
[11]BORODIANSKIY K,ZINIGRAD M,GEDANKEN A.Aluminum A356 reinforcement by carbide nanoparticles[J].Journal of Nano Research,2011,13(2):41-46.
[12]谌援,李欣蔚,罗强.Ti N/Ti复合细化剂对工业纯铝细化效果的影响[J].特种铸造及有色合金,2011,31(8):771-775.CHEN Yuan,LI Xin-wei,LUO Qiang.Influence of new-type Ti N/Ti grain refiner on the grain refining effects in commercial pure aluminum[J].Special Casting&Nonferrous Alloys,2011,31(8):771-775.
[13]李玉洁,李欣蔚,干路.纳米Ti N/Ti细化剂对Al-4Cu合金组织与性能的影响[J].特种铸造及有色合金,2013,33(6):570-573.LI Yu-jie,LI Xin-wei,GAN Lu.Influence of nano Ti N/Ti composite grain refiner on the microstructures and properties of Al-4Cu alloy[J].2013,33(6):570-573.
[14]LI Xin-wei,CAI Qi-zhou,ZHAO Bing-yi.Effect of nano Ti N/Ti refiner addition content on the microstructure and properties of as-cast Al-Zn-Mg-Cu alloy[J].Journal of Alloys and Compounds,2016,675(5):201-210.
[15]WANG Xue-Jiao,XU Cong,ARFAN M.Effects of Al-Ti-B-RE grain refiner on microstructure and mechanical properties of Al-7.0 Si-0.55 Mg alloy[J].Transactions of Nonferrous Metals Society of China,2014,24(7):2244-2250.
[16]JIANG B,LIU W,QIU D.Grain refinement of Ca addition in a twin-roll-cast Mg-3Al-1Zn alloy[J].Materials Chemistry and Physics,2012,133(2):611-616.
[17]姜文辉,韩行霖.Al-Ti-C中间合金晶粒细化剂的合成及其细化晶粒作用[J].中国有色金属学报,1998,8(2):268-271.JIANG Wen-hui.HAN Xing-lin.Preparation of Al-Ti-C master alloys and their grain refining properties[J].The Chinese Journal of Nonferrous Metals,1998,8(2):268-271.
[18]YU Jing-jing,LI Xiao-mei,YU Xin-quan.Thermodynamic analyse on equilibrium precipitation phases and composition design of Al-Zn-Mg-Cu alloys[J].Journal of Shanghai Jiao Tong University(Science),2012,17(3):286-290.
[19]FURUKAWA M,HORITA Z,NEMOTO M.Microhardness measurements and the Hall-Petch relationship in an Al-Mg alloy with submicrometer grain size[J].Acta Materialia,1996,44(11):4619-4629.
[20]ACCHAR W,CAIRO C A,SEGAD?ES A M.Effect of tungsten carbide additions on the microstructure and properties of hot-pressed alumina[J].Materials Science and Engineering A,2005,406(1):74-77.
[2]张纪帅,陈志国,任杰克.新型热机械处理对Al-Zn-Mg-Cu合金显微组织与性能的影响[J].中国有色金属学报,2015,25(4):910-917.ZHANG Ji-shuai,CHEN Zhi-guo,REN Jie-ke.Effect of new thermomechanical treatment on microstructure and properties of Al-Zn-Mg-Cu aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2015,25(4):910-917.
[3]刘吉东,曹志强,张红亮.熔体超声处理对Al-Zn-Mg-Cu铝合金铸态组织及成分偏析的影响[J].机械工程材料,2009,33(9):57-60.LIU Ji-dong,CAO Zhi-qiang,ZHANG Hong-liang.Effect of melt ultrasonic treatment on as-cast microstructure and component segregation of 7050 aluminum alloy[J].Materials for Mechanical Engineering,2009,33(9):57-60.
[4]LIU Guang-lei,SI Nai-chao,SUN Shao-chun.Effects of grain refining and modification on mechanical properties and microstructures of Al-7.5Si-4Cu cast alloy[J].Transactions Nonferrous Metals Society of China,2014,24(4):946-953.
[5]EASTON M,STJOHN D.Grain refinement of aluminum alloys:Part I.The nucleant and solute paradigms-a review of the literature[J].Metallurgical and Materials Transactions A,1999,30(6):1613-1623.
[6]朱正锋,兰晔峰.铝及合金晶粒细化研究现状及发展趋势[J].铸造设备研究,2004,26(2):51-54.ZHU Zheng-feng,LAN Ye-feng.The research about actuality and tendency on grain refinement of aluminum and alloys[J].Research Studies on Foundry Equipment,2004,26(2):51-54.
[7]肖政兵,邓运来,唐建国,陈祺,张新明.Al-Ti-C与Al-Ti-B晶粒细化剂的Zr中毒机理[J].中国有色金属学报,2012,22(2):371-378.XIAO Zheng-bing,DENG Yun-lai,TANG Jian-guo,CHEN Qi,ZHANG Xin-ming.Poisoning mechanism of Zr on grain refiner of Al-Ti-C and Al-Ti-B[J].The Chinese Journal of Nonferrous Metals,2012,22(2):371-378.
[8]QIU Ke,WANG Ri-chu,PENG Chao-qun.Effects of Mn and Sn on microstructure of Al-7Si-Mg alloy modified by Sr and Al-5Ti-B[J].Transactions Nonferrous Metals Society of China,2015,25(11):3546-3552.
[9]GREER A L,BUNN A M,TRONCHE A.Modelling of inoculation of metallic melts:application to grain refinement of aluminum by Al-Ti-B[J].Acta Materialia,2000,48(11):2823-2835.
[10]MYKHALENKOV K,LYSENKO S,REIF W.Application of Ti N particles for grain refinement of aluminum[J].Zeitschrift für Metallkunde,1999,90(9):664-668.
[11]BORODIANSKIY K,ZINIGRAD M,GEDANKEN A.Aluminum A356 reinforcement by carbide nanoparticles[J].Journal of Nano Research,2011,13(2):41-46.
[12]谌援,李欣蔚,罗强.Ti N/Ti复合细化剂对工业纯铝细化效果的影响[J].特种铸造及有色合金,2011,31(8):771-775.CHEN Yuan,LI Xin-wei,LUO Qiang.Influence of new-type Ti N/Ti grain refiner on the grain refining effects in commercial pure aluminum[J].Special Casting&Nonferrous Alloys,2011,31(8):771-775.
[13]李玉洁,李欣蔚,干路.纳米Ti N/Ti细化剂对Al-4Cu合金组织与性能的影响[J].特种铸造及有色合金,2013,33(6):570-573.LI Yu-jie,LI Xin-wei,GAN Lu.Influence of nano Ti N/Ti composite grain refiner on the microstructures and properties of Al-4Cu alloy[J].2013,33(6):570-573.
[14]LI Xin-wei,CAI Qi-zhou,ZHAO Bing-yi.Effect of nano Ti N/Ti refiner addition content on the microstructure and properties of as-cast Al-Zn-Mg-Cu alloy[J].Journal of Alloys and Compounds,2016,675(5):201-210.
[15]WANG Xue-Jiao,XU Cong,ARFAN M.Effects of Al-Ti-B-RE grain refiner on microstructure and mechanical properties of Al-7.0 Si-0.55 Mg alloy[J].Transactions of Nonferrous Metals Society of China,2014,24(7):2244-2250.
[16]JIANG B,LIU W,QIU D.Grain refinement of Ca addition in a twin-roll-cast Mg-3Al-1Zn alloy[J].Materials Chemistry and Physics,2012,133(2):611-616.
[17]姜文辉,韩行霖.Al-Ti-C中间合金晶粒细化剂的合成及其细化晶粒作用[J].中国有色金属学报,1998,8(2):268-271.JIANG Wen-hui.HAN Xing-lin.Preparation of Al-Ti-C master alloys and their grain refining properties[J].The Chinese Journal of Nonferrous Metals,1998,8(2):268-271.
[18]YU Jing-jing,LI Xiao-mei,YU Xin-quan.Thermodynamic analyse on equilibrium precipitation phases and composition design of Al-Zn-Mg-Cu alloys[J].Journal of Shanghai Jiao Tong University(Science),2012,17(3):286-290.
[19]FURUKAWA M,HORITA Z,NEMOTO M.Microhardness measurements and the Hall-Petch relationship in an Al-Mg alloy with submicrometer grain size[J].Acta Materialia,1996,44(11):4619-4629.
[20]ACCHAR W,CAIRO C A,SEGAD?ES A M.Effect of tungsten carbide additions on the microstructure and properties of hot-pressed alumina[J].Materials Science and Engineering A,2005,406(1):74-77.