首页|Ti?6Al?2Zr?1Mo?1V合金TiB2/TiB渗硼层实验和模拟

Ti?6Al?2Zr?1Mo?1V合金TiB2/TiB渗硼层实验和模拟

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对Ti−6Al−2Zr−1Mo−1V合金在920～1120℃温度范围进行渗硼处理,研究渗硼条件对渗硼层的影响.结果表明,渗硼层由外部连续薄TiB2层和里层厚TiB层组成,TiB相呈魏氏体状或针状形貌嵌入基体.在渗硼温度为1000～1080℃、渗硼时间超过8 h渗硼时可获得厚而致密的渗硼层.渗硼层厚度随渗硼温度和渗硼时间增加而增加.渗硼层生长动力学曲线呈抛物线特征.建立TiB2和TiB层生长动力学的预测模型,其计算结果与实验数据达到较好吻合.确定TiB2和TiB激活能分别为223.1和246.9 kJ/mol.
Experiment and modeling of TiB2/TiB boride layer of Ti−6Al−2Zr−1Mo−1V alloy
The influence of the boriding conditions on the boride layers was examined by boriding Ti−6Al−2Zr− 1Mo−1V alloy in the temperature range of 920−1120 ℃. The experimental results show that the boride layers were composed of a continuous thin outer layer of TiB2 and a thick inner layer of TiB with whiskers or needle-like morphologies that extended into the substrate. Thick and compact boride layers were obtained when the boriding temperatures were 1000−1080 ℃, and the treatment time exceeded 8 h. The boride layer depth increased with the boriding temperature and time, and the growth kinetics of the boride layers was characterized by a parabolic curve. The growth kinetics of the boride layers, including both TiB2 and TiB layers, were predicted by establishing a diffusion model, which presented satisfactory consistency with the experimental data. As a result, the activation energies of boron in the TiB2 and TiB layers were estimated to be 223.1 and 246.9 kJ/mol, respectively.

Ti−6Al−2Zr−1Mo−1V alloyboridingmicrostructuremodeling

欧阳德来、胡圣伟、陶成、崔霞、朱知寿、鲁世强

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南昌航空大学 江西省金属材料微结构调控重点实验室,南昌 330063

北京航空材料研究院,北京 100095

Ti−6Al−2Zr−1Mo−1V合金 渗硼 显微组织 模型

authors are grateful for the financial supports from the National Natural Science Foundation of Chinaauthors are grateful for the financial supports from the National Natural Science Foundation of ChinaNatural Science Foundation of Jiangxi Province,ChinaNatural Science Foundation of Jiangxi Province,ChinaKey Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province(Nanchang Hangkong University),ChinaKey Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province(Nanchang Hangkong University),China

51761029518640352020BABL2040112020BABL204007EJ201701513EJ201901454

2021

10.1016/S1003-6326(21)65761-8

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(12)
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