文章摘要
何文艺,肖志瑜,柳中强.基于TiH2原料的粉末冶金Ti-6Al-3Nb-2Zr-1Mo合金的组织与性能研究[J].精密成形工程,2021,13(2):27-35.
HE Wen-yi,XIAO Zhi-yu,LIU Zhong-qiang.Microstructure and Properties of Powder Metallurgy Ti-6Al-3Nb-2Zr-1Mo Alloy Using TiH2 as Raw Material[J].Journal of Netshape Forming Engineering,2021,13(2):27-35.
基于TiH2原料的粉末冶金Ti-6Al-3Nb-2Zr-1Mo合金的组织与性能研究
Microstructure and Properties of Powder Metallurgy Ti-6Al-3Nb-2Zr-1Mo Alloy Using TiH2 as Raw Material
投稿时间:2021-01-01  
DOI:10.3969/j.issn.1674-6457.2021.02.005
中文关键词: TiH2  Ti-6Al-3Nb-2Zr-1Mo合金  烧结工艺  组织与性能
英文关键词: TiH2  Ti-6Al-3Nb-2Zr-1Mo alloy  sintering process  microstructure and mechanical property
基金项目:国家自然科学基金(51627805);广东省自然科学基金(2015A030312003)
作者单位
何文艺 华南理工大学 国家金属材料近净成形工程技术研究中心广州 510640 
肖志瑜 华南理工大学 国家金属材料近净成形工程技术研究中心广州 510640 
柳中强 华南理工大学 国家金属材料近净成形工程技术研究中心广州 510640 
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中文摘要:
      目的 研究烧结工艺对Ti-6Al-3Nb-2Zr-1Mo合金组织演变及力学性能的影响。方法 以TiH2粉末为原料,采用粉末冶金工艺制备低成本高性能的Ti-6Al-3Nb-2Zr-1Mo合金,分析合金在不同烧结条件下组织与性能的变化规律。结果 TiH2的脱氢温度区间集中在450~700 ℃;Ti-6Al-3Nb-2Zr-1Mo合金的烧结过程可分为缓慢致密化、快速致密化、全致密化3个阶段。随着烧结温度的升高与保温时间的延长,试样基体中的等轴α-Ti含量减小,而层片状组织结构的体积分数增大;同时,材料的孔隙率降低,孔洞的圆整度提高,而孔隙半径减小。在1250 ℃下保温烧结4 h后,可制得相对致密度为97.5%的合金试样,其压缩屈服强度σb为1140 MPa,而压缩应变δ为24%。结论 相比于保温时间,烧结温度对Ti-6Al-3Nb-2Zr-1Mo合金的烧结行为有着更加显著的影响,合理选择烧结参数可制得高致密高性能的钛材。
英文摘要:
      The work aims to study the influence of sintering process on the microstructure evolution and mechanical properties of Ti-6Al-3Nb-2Zr-1Mo alloy. Ti-6Al-3Nb-2Zr-1Mo alloy with low cost and high performance were prepared by powder metallurgy using TiH2 powder as raw material, and the microstructure and properties of the alloy under different sintering conditions were analyzed. The temperature range of significant dehydrogenation of TiH2 was concentrated in 450-700 ℃. The sintering process of the compacts can be divided into three stages:slow densification stage, fast densification stage and full densification stage. With the increase of sintering temperature and the extension of holding time, the content of α-Ti in the matrix of Ti-6Al-3Nb-2Zr-1Mo alloy decreased, while the volume fraction of lamellar structure increased. At the same time, the porosity of the sample decreased, the roundness of the hole increased while the pore size decreased. A sample with relative density up to 97.5% and the compressive yield strength of 1140 MPa and the compressive strain 24% was prepared after sintering at 1250 ℃ and holding for 4 h. Compared with the holding time, the sintering temperature has a more significant influence on the sintering behavior of Ti-6Al-3Nb-2Zr-1Mo alloy. Reasonable sintering parameters can contribute to production of titanium with high density and high performance.
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