(太原理工大學 表面工程研究所， 太原 030024)
摘 要: 利用雙層輝光離子滲金屬技術在Ti6Al4V表面滲Mo, 形成了表面改性合金層, 就910～990℃滲Mo時基體溫度對表面合金層性能的影響進行了研究。 結果表明, 滲Mo后的表面合金層由擴散層和沉積層組成, 沉積層呈（211）晶面的擇優(yōu)取向。 隨著基體溫度的升高, 擴散層的厚度增加, 并且合金層表面粗糙度增大。 滲Mo后的表面合金層硬度較基體Ti6Al4V的大大提高, 而基體溫度變化對合金層硬度沒有明顯影響。 用涂層壓入儀對沉積層和擴散層間的結合強度進行了評定。 研究表明, 隨著基體溫度的升高, 臨界壓入載荷pc增大, 沉積層和擴散層間的結合強度增大。
關鍵字: 雙層輝光離子滲金屬； Ti6Al4V； Mo； 組織； 性能
PAN Jun-de, TIAN Lin-hai, XU Zhong
（Surface Engineering Institute, Taiyuan University of Technology,
Taiyuan 030024, China）
Abstract:Surface alloying layer of molybdenum on Ti6Al4V base was formed by double glow discharge technique. The influence of Ti6Al4V base temperature on the properties of molybdenum alloying layer at 910-990℃ was studied. The results show that the molybdenum alloying layer is composed of deposit layer and diffuse layer. The thickness of diffuse layer and the surface roughness of molybdenum alloying layer increase with increasing the Ti6Al4V base temperature. The microhardness value of molybdenum alloying layer is much larger than that of Ti6Al4V base. The change of Ti6Al4V base temperature has little influence on the hardness of molybdenum alloying layer. The bonding strength between the molybdenum deposit and diffuse layer was studied with the indentation test. The result shows that it increases with increasing the Ti6Al4V base temperature.
Key words: double glow discharge technique； Ti6Al4V； molybdenum； microstructure； property
