Abstract：In order to strengthen the wear resistance in surface of aluminum alloy (LY12), coatings were manufactured by using titanium and aluminum wires and supersonic arc spraying systems of model SAS-I. The influence of arc spraying technological parameters on oil drip feed lubrication slide-wear resistance of coatings was studied by orthogonal regression experimental design method, then the slide wear properties of the coatings sprayed under optimum parameters conditions and the aluminum alloy matrix (LY12) was determined, the microstructure of the coatings and the character of worn surface were observed and analyzed by X-ray diffraction and scanning electric microscopy respectively. The results show that; the abrasive volume of coatings decreases with spraying voltage while the spraying distance is shorter, and increases with spraying voltage at the longer spraying distance, the longer the spraying distance, the higher the speed of coating abrasive volume increasing with spraying voltage; the abrasive volume of coatings decreases with spraying distance at lower spraying voltage, but with spraying voltage increasing, the volume of coatings increases with spraying distance and the more quickly the abrasive volume of coatings increasing with spraying distance. The abrasive volume of coatings sprayed by optimum parameters, such as 26V and 0.236m, is only equal to 1/38.84 of aluminum alloy (LY12). It is indicated that the coatings of Ti-Al twin wires ultrasonic arc spraying has excellent surface strengthening effect on aluminum alloy with optimum spraying parameters.
[1] 王汉功.超音速电弧喷涂技术[M].北京:国防工业出版社,19991-10. [2] 温瑾林.电弧喷涂技术的进步[J].中国表面工程,1994,(1):1621. [3] 黄伯云.钛铝金属间化合物[M].长沙:中南工业大学出版社,1998.1-57. [4] CANTOR B,GTANT P s Spray formed TiAl[P]GR Patent:GR/K00998, 1993 - 1995. [5] TSUNEKAWA Y, GOTOH K, OKUMIYA M, MOHRI N. Synthesis and high-temperature stability of titanium aluminize matrix in situ composites[J].Journal of Thermal Spray Technology, 1992, 1(3) :223 229. [6] WANG Han-gong,LI PinglGUO Qin. Study of microstructure and properties of TiAl alloy coatings ultrasonic arc sprayed[ A].SHI Zhi-ping. Proceedings of the First International Conference on Mechanical Engineering ( ICME2000 ) [ C ].Beijing: China Machine Press, 2000. 319. [7] WANG Han-gong, LI Ping, GUO Qin, et al. Study of slide-wear resistance of ultrasonic arc sprayed TiAl alloy coatings [ A ].BERNDT C C, KHOR K A and LUGS CHEIDER E F. Proceedings of International Thermal Spraying Conference[C].ohio:ASM International, Materials Park, 2001. 1111 - 1113. [8] 李平,王汉功,胡重庆.用均匀设计法实验研究超音速电弧喷涂Ti-Al合金涂层的结合强度与工艺参数之间的关系[J].热加工工艺,2003,(1):34-37. [9] 李平,王汉功.铝合金表面Ti-Al双丝超音速电弧喷涂涂层的组织与性能研究[J].材料工程,2003,(3):17-20. [10] TANG Q Y, FENG M G. DPS data processing system for practical statistics[M].Beijing: Science Press, 2002. [11] 李健明.磨损金属学[M].北京:冶金工业出版社,1990.185.
2004, Vol. 0 
