采用线膨胀系数可控ZrO2-TiO2陶瓷模具的钛合金高精度超塑成形

对线膨胀系数可控的ZrO2-TiO2陶瓷模具及钛合金高精度超塑成形进行了系统研究。探讨了TiO，体积分数和相对密度对ZrO2-TiO2陶瓷的线膨胀系数的影响规律，并引入相对密度修正模型——Tumer模型来准确预测复合陶瓷材料的线膨胀系数。采用压痕法检测了与TC4钛合金等膨胀系数的ZrO2-TiO2陶瓷模具的超塑成形精度。在925％下，利用ZrO2-TiO2陶瓷模具进行超塑成形，其使用性能良好。结果表明ZrO2-TiO2陶瓷的线膨胀系数随TiO2体积分数的增加而减小，随相对密度的增加而增加。采用线膨胀系数优化的ZrO2-TiO2陶瓷模具，成形精度误差大幅降低，不超过0．1％，且陶瓷模具具有足够的...

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Bibliographic Details
Published in航空材料学报 Vol. 32; no. 4; pp. 8 - 14
Main Author 蒋少松 赫晓东 张凯锋 高鹏 李保永
Format Journal Article
LanguageChinese
Published 哈尔滨工业大学材料科学与工程学院,哈尔滨,150001%哈尔滨工业大学航天学院,哈尔滨,150001%北京航星机器制造公司,北京,100013 2012
Subjects
TC4钛合金
成形精度
线膨胀系数（LEC）
超塑成形
陶瓷模具
TC4钛合金
超塑成形
成形精度
线膨胀系数(LEC)
陶瓷模具
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ISSN1005-5053
DOI10.3969/j.issn.1005-5053.2012.4.002

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Summary:对线膨胀系数可控的ZrO2-TiO2陶瓷模具及钛合金高精度超塑成形进行了系统研究。探讨了TiO，体积分数和相对密度对ZrO2-TiO2陶瓷的线膨胀系数的影响规律，并引入相对密度修正模型——Tumer模型来准确预测复合陶瓷材料的线膨胀系数。采用压痕法检测了与TC4钛合金等膨胀系数的ZrO2-TiO2陶瓷模具的超塑成形精度。在925％下，利用ZrO2-TiO2陶瓷模具进行超塑成形，其使用性能良好。结果表明ZrO2-TiO2陶瓷的线膨胀系数随TiO2体积分数的增加而减小，随相对密度的增加而增加。采用线膨胀系数优化的ZrO2-TiO2陶瓷模具，成形精度误差大幅降低，不超过0．1％，且陶瓷模具具有足够的热机械性能进行超塑成形，使用性能优良。
Bibliography:The ZrO2-TiO2 ceramic die with controllable linear expansion coefficient （LEC） and the high precision superplastic forming were studied, The influence of TiO2 fraction and relative density on linear expansion coefficient of ZrO2-TiO2 ceramic was analyzed. The Turner model was modified and the relative density was introduced into the model. The forming accuracy of ceramic die with the similar LEC to TC4 titanium alloy was measured. The ZrO2 -TiO2 deep cylinder ceramic die was fabricated and its performance was e- valuated by the superplastic forming experiment at 925~C. The results show that the LEC decreases with the increment of volume frac- tion of TiO2 and increases with the rising of relative density. The modified Turner model more accurately predicted. Using the ZrO2- TiO2 ceramic die with optimal LEC, the forming accuracy deviation significantly reduced and not exceed of 0. 1%. The ceramic die owns enough sufficient thermal mechanical properties and excellent performance.
11-3159/V
JIANG Shao-song, HE Xia
ISSN:1005-5053
DOI:10.3969/j.issn.1005-5053.2012.4.002