热处理制度对汽车用TC6钛合金组织及性能的影响

李广德; 王瑛; 李伟伦

doi:10.7513/j.issn.1004-7638.2021.06.021

热处理制度对汽车用TC6钛合金组织及性能的影响

doi: 10.7513/j.issn.1004-7638.2021.06.021

1.
青海交通职业技术学院, 青海西宁810003
2.
青海省教育厅教育评估与质量监测中心, 青海西宁810008
3.
兰州理工大学材料科学与工程学院, 甘肃兰州730050

基金项目: 交通部西部交通建设科技项目(200131879549)。

详细信息

作者简介:
李广德（1982—），男，青海西宁人，副教授，硕士，主要从事机械制造及汽车行业相关研究工作，E-mail：47756433@qq.com

中图分类号: TF823,TG156
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出版历程
- 收稿日期: 2020-06-24
- 录用日期: 2021-11-19
- 刊出日期: 2021-12-31

Effect of heat treatment on microstructure and properties of TC6 titanium alloy

1.
Qinghai Communications Technical College, Xining 810003, Qinghai, China
2.
Education Evaluation and Quality Monitoring Center of Qinghai Education Department, Xining 810008, Qinghai, China
3.
School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China

摘要

摘要: 采用四种不同热处理制度对汽车用TC6钛合金棒材进行了等温退火试验，并进行了试样显微组织、耐磨损性能和耐腐蚀性能测试与分析。结果表明，采用“870 ℃保温1.5 h，炉冷至600 ℃保温2 h，空冷”热处理制度（1^#试样）时，合金的耐磨损和耐腐蚀性能最差；采用“900 ℃保温1.5 h，炉冷至600 ℃保温2 h，空冷”热处理制度（2^#试样）时，合金的耐磨损和耐腐蚀性能最佳；采用“920 ℃保温1.5 h，炉冷至600 ℃保温2 h，空冷” （3^#试样）和“900 ℃保温1.5 h，炉冷至620 ℃保温2 h，空冷” （4^#试样）时，合金试样的腐蚀电位和耐腐蚀性能介于上述二者之间。与1^#试样相比， 2^#试样的磨损体积减小8×10⁻³mm³、腐蚀电位正移53 mV。
- TC6钛合金 /
- 热处理 /
- 等温退火 /
- 显微组织 /
- 耐磨损性能 /
- 耐腐蚀性能
Abstract: TC6 titanium alloy bars were annealed by four different heat treatment processes. The microstructure, wear resistance and corrosion resistance of the samples were tested and analyzed. The results show that under the heat treatment at 870 ℃ for 1.5 h, furnace cooling to 600 ℃ and insulation for 2 h followed by air cooling, the wear resistance and corrosion resistance of the alloy (sample 1^#) are the worst. The sample under the heat treatment at 900 ℃ for 1.5 h, furnace cooling to 600 ℃ and insulation for 2 h followed by air cooling shows the best wear resistance and corrosion resistance (sample 2^#). The corrosion potential and corrosion resistance of the samples respectively under the heat treatment processes of 920 ℃ for 1.5 h furnace cooling to 600 ℃ and insulation for 2 h air cooling(sample 3^#), and 900 ℃ for 1.5 h furnace cooling to 620 ℃ and insulation for 2 h air cooling (sample 4^#), are between those of the sample 1^# and sample 2^#. Compared with sample 1^#, the wear volume of sample 2^# decreases by 8×10⁻³ mm³, and the corrosion potential shifts by +53 mV.
- TC6 titanium alloy /
- heat treatment /
- isothermal annealing /
- microstructure /
- wear resistance /
- corrosion resistance

HTML全文

图 1 试样显微组织金相照片

(a) 1^#试样；(b) 2^#试样；(c) 3^#试样；(d) 4^#试样

Figure 1. Metallography microstructure of specimens

下载: 全尺寸图片幻灯片

图 2 试样耐磨损性能测试结果

Figure 2. The wear resistance of samples

下载: 全尺寸图片幻灯片

图 3 试样磨损试验后的表面形貌

(a) 1^#试样；(b) 2^#试样；(c) 3^#试样；(d) 4^#试样

Figure 3. Surface morphology of samples after wear test

下载: 全尺寸图片幻灯片

图 4 试样耐腐蚀性能测试结果

Figure 4. Corrosion resistance of samples

下载: 全尺寸图片幻灯片

图 5 试样腐蚀试验后的表面形貌

(a) 1^#试样；(b) 2^#试样；(c) 3^#试样；(d) 4^#试样

Figure 5. Surface morphology of samples after corrosion test

下载: 全尺寸图片幻灯片

表 1 钛合金试样化学成分

Table 1. Chemical compositions of the TC6 sample %

Al Mo Cr Si Fe C N H Ti

检测值 6.28 2.89 1.32 0.27 0.31 0.086 0.021 0.007 Bal.
标准要求值 5.5～7 2～3 0.8～2.3 0.15～0.4 0.2～0.7 ≤0.1 ≤0.05 ≤0.015 Bal.

下载: 导出CSV

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