生物医用Ti6Al4V合金注射成形研究
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摘要
利用PEG基粘结剂体系和气雾化球形Ti6Al4V合金粉制备了成分均匀、流变性能及热性能稳定的注射料,并进行烧结。通过工艺参数调控,1 320℃下保温3 h的烧结试样相对密度97.6%,极限抗拉强度900 MPa,屈服强度867 MPa,伸长率为12%,力学性能整体满足ASTM F2885-11标准要求。高真空烧结条件加速了烧结件的致密化过程,而且能够有效降低氧、氮等杂质元素的含量,除氧元素质量分数(0.229%)略高于标准值(<0.200%)外,其他杂质元素含量均满足ASTMF2885-11标准。
PEG-based binder system and gas atomized spherical Ti6 Al4 V alloy powder were used to prepare injection materials with uniform composition,stable rheological property and thermal property,and then the samples were sintered. Through the adjustment and control of process parameters,the relative density of sintered samples sintered at 1 320 ℃ for 3 h is 97.6%,the ultimate tensile strength is 900 MPa,the yield strength is 867 MPa,and the elongation is 12%. The mechanical properties of the sintered samples meet the requirements of ASTM F2885-11.High vacuum sintering conditions accelerate the densification process of sintered samples,and can effectively reduce the content of oxygen,nitrogen and other impurity elements. The content of oxygen elements(0.229%)is slightly higher than the standard value(<0.200%),while the content of other impurity elements all meet ASTMF2885-11 standard.
PEG-based binder system and gas atomized spherical Ti6 Al4 V alloy powder were used to prepare injection materials with uniform composition,stable rheological property and thermal property,and then the samples were sintered. Through the adjustment and control of process parameters,the relative density of sintered samples sintered at 1 320 ℃ for 3 h is 97.6%,the ultimate tensile strength is 900 MPa,the yield strength is 867 MPa,and the elongation is 12%. The mechanical properties of the sintered samples meet the requirements of ASTM F2885-11.High vacuum sintering conditions accelerate the densification process of sintered samples,and can effectively reduce the content of oxygen,nitrogen and other impurity elements. The content of oxygen elements(0.229%)is slightly higher than the standard value(<0.200%),while the content of other impurity elements all meet ASTMF2885-11 standard.
引文
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[2]汤鑫,李爱红,李博.球形钛及钛合金粉制备工艺研究现状[J].粉末冶金工业,2018,28(2):58.
[3]马嘉丽,于振华,朱明,等.镍钛合金血管支架性能研究综述[J].金属功能材料,2015,22(2):56.
[4]李红梅,雷霆,方树铭,等.生物医用钛合金的研究进展[J].金属功能材料,2011,18(2):70.
[5] Froes F H S. Advances in titanium metal injection molding[J].Powder Metallurgy&Metal Ceramics,2007,46(5/6):303.
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[7] Weil K S,Nyberg E,Simmons K. A new binder for powder injection molding titanium and other reactive metals[J]. Journal of Materials Processing Technology,2006,176(1):205.
[8]周时宇,蔡一湘,罗铁钢,等.钛注射成形用催化脱脂型喂料的制备与性能研究[J].粉末冶金技术,2015,33(2):95.
[9] Sidambe A T,Figueroa I A,Hamilton H,et al. Improved processing of titanium alloys by metal injection moulding[C]//IOP Conference Series Materials Science and Engineering,2011,26(1):012005.
[10] Nor N H M,Muhamad N,Ihsan A K A M,et al. Sintering parameter optimization of Ti-6Al-4V metal injection molding for highest strength using palm stearin binder[J]. Procedia Engineering,2013,68(12):359.
[11]王瑞锋,吴运新,邹欣,等.注射成形纯钛脱粘和烧结工艺研究[J].粉末冶金技术,2006,24(2):83.
[12]杨涵崧,李慕勤,赵淑金.粉末冶金法制备医用多孔钛的研究[J].粉末冶金工业,2009,19(6):38.
[13]李艳,郭志猛,郝俊杰.医用多孔钛植入材料凝胶注模成形工艺研究[J].粉末冶金工业,2008,18(1):10.