
稀有金属快报
的进行,晶粒组织完成了从消除应力、回复和再结晶整个过程。当退火温度为700℃时,其显微组织(图2b)和挤压态(R)组织未发生明显变化。当退火温度升高到800~850℃时,条状α开始球化,初生α晶粒间的β转组织开始增加(图2c,2d)。当退火温度升高至900℃时,显微组织发生明显球化和再结晶(图2e)。当退火温度继续升高至960℃ 时,α组织体积明显减少形成了典型的双态组织(图2f)。这与许多文献(2)提出的Ti-6Al-2Zr-1Mo-1V钛合金的再结晶开始和终了温度分别为800℃ 和960℃基本一致。
4结论
(1)TA15钛合金挤压管材随着退火温度升高组织得到改善。
(2)TA15钛合金管材退火温度范围较宽,管
材在900℃,1h退火后组织与力学性能匹配良好。参考文献References
[] Wang Yongqiang(王永强).Acta Metallurgica Sinica(金属学报)2002,38:87
[2]Chu Junpeng(储俊鹏.Acta Metallurgica Sinica(金属学报)[J].2002, 38:81
TheEffectofAnnealingProcessonMicrostructureand PropertiesofTA15AlloyTubeProducedbyExtruding
Dai Chun,Li Changjiang,YangLonglin,LiNong,ShangXiuli,WangQiaoli
(Baoji Titanium Industry Co., Lid., Baoji 721014, China)
Abstract: The effects of annealing preocess on microstructure and properties of TA15 alloy tube produced by extruding were investigated. The results shows that o, and ea of TA15 alloy tube extruded reduce slightly, but ductility has no change with the increase of annealing temperature. Intermal stress of the alloy tube can be released and accompanied with partial recrystallizition when annealed at temperature of 700 °C~850 °C, and recrystallization fulfilled when annealed at temperature of 900 °C, which the TA15 alloy tube with
microstructure of refinement and spheroidal and good mechanical properties can be obtained. Keywords: TA15 alloy tube; microstructure; properties
Biography: Dai Chun, Engineer, Baoji Titanium Industry Co., Lid., Baoji 721014, P.R. China, Tel: 00869173382444,
Email: daichun4056@163.com 专利信息(Ⅱ)
专利名称:生物陶瓷钛基复合材料及其制备方法
专利申请号:200810026378.3
公开号:CN101229587 专利申请人:暨南大学
申请日:2008_02-20 公开日:2008-0730
本发明涉及一种生物陶瓷钛基复合材料的粉末冶金制备方法。其特征在于:①将粒度为5~100um的金属钛粉与粒度小于100nm的纳米羟基磷灰石粉混合均匀,其
中纳米羟基磷灰石体积分数为1%~10%;②混合粉末采用等静压成形,在1050~1200℃真空烧结,制备得到生物陶瓷钛基复合材料。所制得的复合材料的生物活性高于粉末冶金方法制备的纯钛材料,复合材料抗弯强度大于 140MPa,高于或相当于人体骨;复合材料压缩弹性模量为7.9~18.5GPa,与人体骨接近。本发明可用于制备人体骨骼和牙齿等硬组织用生物置换(修复)体。