| 深冷处理对TC4钛合金表面性能的影响 |
| |
| 引用本文： | 师佑杰,李永刚,李文辉,王兴富.深冷处理对TC4钛合金表面性能的影响[J].金属热处理,2022,47(2):183-187. |
| |
| 作者姓名： | 师佑杰 李永刚 李文辉 王兴富 |
| |
| 作者单位： | 1.太原理工大学 机械与运载工程学院, 山西 太原 030024; 2.精密加工山西省重点实验室, 山西 太原 030024; 3.山西省金属材料腐蚀与防护工程技术研究中心, 山西 太原 030024 |
| |
| 基金项目： | 国家自然科学基金(51705352)；;中国博士后科学基金(2018M641682)； |
| |
| 摘 要： | 研究了深冷处理对TC4钛合金滚磨光整加工和表面性能的影响。对TC4钛合金试样进行深冷处理,将不同深冷时间下的试样进行滚磨光整加工,根据表面粗糙度确定适合的深冷时间后,对比分析深冷处理前后合金试样的显微组织、显微硬度及残余应力的变化。利用扫描电镜探究了深冷处理和滚磨光整加工后合金试样表面形貌的变化。结果表明,深冷处理12 h后试样表面粗糙度最小,试样组织受到冷缩内应力的作用,α相的比例从未深冷处理的56.45%增加到85.42%,组织变得均匀且致密。试样的显微硬度在深冷处理12 h时最大,比未处理试样提高了3.47%。深冷处理12 h和滚磨光整加工后的试样相比未处理试样表面残余压应力增加26.26%。粗糙度测量和扫描电镜结果显示深冷处理使钛合金试样的可加工性增强,深冷处理12 h的试样经过离心式滚磨光整加工表面粗糙度可从约0.500 μm下降到约0.250 μm,表面质量明显变好。
|
| 关 键 词： | TC4钛合金 深冷处理 显微组织 显微硬度 残余应力 表面粗糙度 |
| 收稿时间： | 2021-09-28 |
Effect of cryogenic treatment on surface properties of TC4 titanium alloy |
| |
| Shi Youjie,Li Yonggang,Li Wenhui,Wang Xingfu.Effect of cryogenic treatment on surface properties of TC4 titanium alloy[J].Heat Treatment of Metals,2022,47(2):183-187. |
| |
| Authors: | Shi Youjie Li Yonggang Li Wenhui Wang Xingfu |
| |
| Affiliation: | 1. College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China; 2. Shanxi Key Laboratory of Precision Processing, Taiyuan Shanxi 030024, China; 3. Engineering and Technology Research Center for Metal Material Corrosion and Protection of Shanxi Province, Taiyuan Shanxi 030024, China |
| |
| Abstract: | Effect of cryogenic treatment on barrel polishing and finishing and surface properties of the TC4 titanium alloy was studied. The TC4 titanium alloy specimen was subjected to cryogenic treatment, and the specimens under different cryogenic time were barrel polished and finished. After determining the appropriate cryogenic time according to the surface roughness, the changes of microstructure, microhardness and residual stress of the alloy specimens before and after cryogenic treatment were compared and analyzed. The change of surface morphology of the alloy after cryogenic treatment and barrel polishing and finishing was investigated by means of scanning electron microscope. The results show that the surface roughness of the specimen is the smallest after cryogenic treatment for 12 h, and the structure is affected by the internal stress of cold shrinkage, so that the proportion of α phase rises from 56.45%(untreated) to 85.42%, and the structure becomes uniform and dense. The microhardness of the alloy is the highest when cryogenic treated for 12 h, which is increased by 3.47% compared with untreated specimen. The surface residual compressive stress of the specimen increases by 26.26% after cryogenic treatment for 12 h and barrel polishing and finishing, compared with untreated specimen. Roughness measurement and scanning electron microscope results show that cryogenic treatment enhances the machinability of the titanium alloy specimen. The surface roughness of the specimen cryogenic treated for 12 h can reduce from about 0.500 μm(untreated specimen) to about 0.250 μm after barrel polishing and finishing, and the surface quality is significantly improved. |
| |
| Keywords: | TC4 titanium alloy cryogenic treatment microstructure microhardness residual stress surface roughness |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《金属热处理》浏览原始摘要信息 |
|
点击此处可从《金属热处理》下载全文 |
|
