| YANG Chuang,MA Ya-qin,WANG Liang.Microstructure and Properties of Vacuum Pulse Oxidation Hardening Layer on TC4 Titanium Alloy[J],42(3):38-41 |
| Microstructure and Properties of Vacuum Pulse Oxidation Hardening Layer on TC4 Titanium Alloy |
| Received:January 12, 2013 Revised:February 22, 2013 |
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| DOI： |
| KeyWord:TC4 titanium vacuum pulse oxidation structure property |
| Author | Institution |
| YANG Chuang |
School of Materials and Architecture Engineering, Guizhou Normal University, Guiyang , China |
| MA Ya-qin |
School of Materials and Architecture Engineering, Guizhou Normal University, Guiyang , China |
| WANG Liang |
School of Materials and Architecture Engineering, Guizhou Normal University, Guiyang , China |
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| Abstract: |
| A hardened layer possessing good bonding strength with substrate was prepared on the surface of TC4 titanium alloy by a process of vacuum pulse oxidation. The microstructure, hardness and brittleness of hardening layer were analyzed.The results show the hardened layer comprises a surface oxide layer and an oxygen diffusion zone, TiO2of the oxide layer happen to change, oxygen penetrate into the substrate, the phase of oxide layer is composed of 琢-Ti, rutile TiO2, TiO and Ti3Al, surface microstructure appear compact,the surface hardness of the TC4 titanium are 650 ~ 670 HV, the thickness of the hardened layer can reach 60 ~ 80 μm, because of the effect of solid solution strengthening in oxygen diffusion zone, the hardened layer has low brittleness and the hardness gradient of hardened zone is flat . |
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