| 摘要: |
| 以渗层厚度和表面硬度为评定依据，采用正交试验对TC4钛合金表面氧化锆催渗渗硼工艺进行了优化，其中渗硼温度影响最大，其次为渗硼时间和ZrO2含量，B4C含量影响最小，最优工艺为：渗硼温度1 050 ℃，渗硼时间25 h，渗硼剂配比(质量分数)：B4C 20%， ZrO2 4%，SiC 76%。利用X射线衍射仪和光学显微镜对渗层的物相组成和厚度进行分析，结果表明：渗层表面主要由TiB2、TiB、TiB12、TiC、TiN组成，渗层厚度为46.67 μm。与基础渗硼剂所得渗层相比，渗硼层厚度、渗层硬度、界面结合力和耐磨性都有所提高。 |
| 关键词: TC4钛合金 固体渗硼 正交试验 氧化锆 催渗工艺 |
| DOI：10.3969/j.issn.1007-9289.2013.06.009 |
| 分类号: |
| 基金项目: |
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| Optimization of Zirconium Oxide Infiltration Process on Surface of TC4 Titanium Alloy |
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HE Xinghua, GE Xiaolan, XU Xiaojing, LIU Yunhui, TAO Jun, SONG Zhenhua
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Engineering Institute of Advanced Manufacturing and Modern Equipment Technology, Jiangsu University, Zhenjiang 212013, Jiangsu
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| Abstract: |
| Zirconium oxide infiltration process on surface of TC4 titanium alloy was optimized by orthogonal experiments,which was based on the thickness and hardness of boronizing layer.It is concluded that boronizing temperature has the most important effect ,the next are boronizing time and content of ZrO2,and the last is the content of B4C. The optimum process is as follows: boronizing temperature is 1 050 ℃, boronizing time is 25 h, and the mass fraction of B4C, ZrO2, SiC is 20%, 4% and 76%, respectively. The phase composition and thickness of the boronizing layer were analyzed by Xray diffraction (XRD) and optical microscope.The result shows that the boronizing layer is mainly composed of TiB2, TiB, TiB12, TiC, TiN and the thickness of the boronizing layer is 46.67 μm. Compared with the basic formula, thickness, hardness, interface bonding force and abrasive resistance of titanium alloy surface is obviously improved. |
| Key words: TC4 titanium alloy solid boronizing orthogonal experiment zirconium oxide infiltration process |
