硼含量对Ti-Zr-Nb-B合金显微组织及性能的影响

doi:10.13251/j.issn.0254-6051.2023.09.027

金属热处理 ›› 2023, Vol. 48 ›› Issue (9): 157-164.DOI: 10.13251/j.issn.0254-6051.2023.09.027

硼含量对Ti-Zr-Nb-B合金显微组织及性能的影响

李文刚^1,2, 炊鹏飞^1,3, 程尊鹏¹, 李春梅¹, 景然^1,3, 李江华^1,3, 廖仲尼^1,3

1.陕西理工大学材料科学与工程学院, 陕西汉中 723000;
2.西安赛特思迈钛业有限公司, 陕西西安 710201;
3.陕西理工大学矿渣综合利用环保技术国家地方联合工程实验室, 陕西汉中 723000

收稿日期:2023-04-20 修回日期:2023-07-10 出版日期:2023-09-25 发布日期:2023-10-25
通讯作者: 炊鹏飞,副教授,博士,E-mail:cuanpengfei@163.com
作者简介:李文刚(1995—),男,硕士研究生,主要研究方向为钛合金强韧化,E-mail:liwg_gg@163.com。
基金资助:
国家自然科学基金(51701111,51901120);陕西省自然科学基础研究计划(2018JQ5170,19JK0170);陕西省教育厅科研计划(19JK0184,21JK0560,2020JQ-871)

Effect of boron content on microstructure and properties of Ti-Zr-Nb-B alloys

Li Wengang^1,2, Chui Pengfei^1,3, Cheng Zunpeng¹, Li Chunmei¹, Jing Ran^1,3, Li Jianghua^1,3, Liao Zhongni^1,3

1. School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong Shaanxi 723000, China;
2. Xi'an Saite Simai Titanium Industry Co., Ltd., Xi'an Shaanxi 710201, China;
3. National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology, Shaanxi University of Technology, Hanzhong Shaanxi 723000, China

Received:2023-04-20 Revised:2023-07-10 Online:2023-09-25 Published:2023-10-25

摘要/Abstract

摘要： 采用非自耗真空电弧炉制备了不同硼含量的Ti-Zr-Nb-B合金。借助X-射线衍射仪(XRD)、光学显微镜(OM)、万能试验机及电化学工作站对合金的显微组织、力学性能及耐蚀性能进行了研究。结果表明,硼元素使合金中有少量针状α相出现,合金组织由等轴转变为枝晶结构且晶粒发生明显细化,并在枝晶臂处析出TiB、ZrB₂化合物,在硼含量(原子分数)2.0%、4.0%时枝晶发生粗化。随硼含量的增加,合金硬度提高,塑性降低,屈服强度表现出先升高后降低再升高的变化趋势;在硼含量为4.0%时,合金屈服强度和硬度达到最大,分别为843 MPa和281 HV0.2。在3.5%NaCl溶液中的腐蚀试验表明,硼元素的添加导致合金耐蚀性降低,(TiZr)₉₀Nb₁₀合金耐蚀性最好,(TiZr)_89.5Nb₁₀B_0.5合金耐蚀性最差。

关键词: Ti-Zr-Nb-B合金, 显微组织, 力学性能, 耐蚀性能

Abstract: Ti-Zr-Nb-B alloys with different boron contents were prepared by non-consumable vacuum arc furnace. The microstructure, mechanical properties and corrosion resistance of the alloys were studied by means of X-ray diffractometer (XRD), optical microscope (OM), universal testing machine and electrochemical workstation. The results show that the boron element causes the appearance of a small amount of acicular α phase in the alloy, the microstructure of the alloy changes from equiaxed to dendritic structure and the grain is obviously refined, and TiB and ZrB₂ compounds are precipitated at the dendrite arms, and the dendrite is coarsened when the atom fraction of boron is 2.0% and 4.0%. With the increase of boron content, the hardness of the alloy increases, the plasticity decreases, and the yield strength increases at first, then decreases, and then increases. When the atom fraction of boron is 4.0%, the yield strength and hardness of the alloy reach the maximum values of 843 MPa and 281 HV0.2. The corrosion test in 3.5%NaCl solution shows that the addition of boron reduces the corrosion resistance of the alloy, the (TiZr)₉₀Nb₁₀ alloy has the best corrosion resistance, and the (TiZr)_89.5Nb₁₀B_0.5 alloy has the worst corrosion resistance.

Key words: Ti-Zr-Nb-B alloy, microstructure, mechanical properties, corrosion resistance

中图分类号:

TG146.23

李文刚, 炊鹏飞, 程尊鹏, 李春梅, 景然, 李江华, 廖仲尼. 硼含量对Ti-Zr-Nb-B合金显微组织及性能的影响[J]. 金属热处理, 2023, 48(9): 157-164.

Li Wengang, Chui Pengfei, Cheng Zunpeng, Li Chunmei, Jing Ran, Li Jianghua, Liao Zhongni. Effect of boron content on microstructure and properties of Ti-Zr-Nb-B alloys[J]. Heat Treatment of Metals, 2023, 48(9): 157-164.

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硼含量对Ti-Zr-Nb-B合金显微组织及性能的影响

Effect of boron content on microstructure and properties of Ti-Zr-Nb-B alloys

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