SiC_p添加量对近β钛合金显微组织及力学性能的影响

发布时间：2018-06-07 05:00

本文选题：近β钛合金 + SiC_p添加量　；参考：《稀有金属材料与工程》2017年05期

【摘要】：通过真空非自耗熔炼工艺制备了不同SiC_p添加量(0%,0.1%,0.4%,1.0%,质量分数)的近β钛合金。采用X射线衍射仪(XRD)、扫描电镜(SEM)、维氏显微硬度计和万能材料试验机,系统研究了SiC_p添加量对近β钛合金显微组织及力学性能的影响规律。结果表明,不同SiC_p添加量的近β钛合金主要由α-Ti、β-Ti和TiC所组成。近β钛合金的初生β晶粒尺寸取决于SiC_p的添加量,SiC_p添加量由0%增加到1%时,近β钛合金初生β晶粒尺寸由639μm降低至323μm。由于受细晶强化、TiC承载强化以及Si的固溶强化的影响,随着SiC_p添加量的增加,近β钛合金的显微硬度、压缩强度有显著提高,而压缩率却明显降低。
[Abstract]:The near 尾 titanium alloys with different SiC_p content and 0.1% and 1.0% mass fraction were prepared by vacuum non-consumptive melting process. The effects of SiC_p addition on microstructure and mechanical properties of near 尾 titanium alloy were systematically studied by means of X-ray diffractometer, scanning electron microscope (SEM), Vickers microhardness tester and universal material tester. The results show that the near 尾 titanium alloys with different SiC_p content are mainly composed of 伪 -Ti, 尾 -Ti and TiC. The primary 尾 grain size of the near 尾 titanium alloy depends on the addition of SiC_p from 0% to 1%, and the primary 尾 grain size of the near 尾 titanium alloy decreases from 639 渭 m to 323 渭 m. The microhardness and compressive strength of the near 尾 -Ti alloy increased significantly with the increase of SiC_p content, but the compression ratio decreased obviously because of the effect of the fine grain strengthening tic bearing strengthening and the Si solution strengthening.
【作者单位】：太原理工大学;内蒙古工业大学;哈尔滨工业大学金属精密热加工国家级重点实验室;
【基金】：国家自然科学基金(51504163) 北京科技大学新金属材料国家重点实验室基金(2014-ZD06) 太原理工大学人才基金资助项目(tyut-rc201343a);太原理工大学校青年团队项目(2013T001-2013T004)
【分类号】：TG146.23

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