混粉准干式电火花复合强化TC4钛合金试验研究
|
摘要
以石墨和紫铜为强化电极,TC4钛合金为基体材料,在混粉准干式工作介质中对TC4钛合金进行电火花表面强化,分析了不同电极材料对强化层微观组织和性能的影响。结果表明,复合强化可以获得组织致密且厚度均匀的表面强化层,显著改善基体表层质量。强化层显微硬度约为1 500 HV,相对磨损率约为基体材料的27%。TC4钛合金表面强化层的显微硬度和耐磨性能均大幅提高。
Surface of TC4 alloy was treated in near-dry powder-mixed medium conditions with the graphite electrode and copper electrode by electrical sparking. The effects of different electrode on micro-structure, micro-hardness, and the wear resistance of strengthened layers were analyzed and investigated. The results show that multi-strengthening can make layer more compact, and the thickness of the layer more uniform, that is improving the surface quality, remarlablely. The micro-hardness of the layer is measured to be about 1 500 HV, and the relative wear loss of multi-strengthening surface is27% of raw materials. The micro-hardness and wear resistance of the strengthened layers are improved significantly.
Surface of TC4 alloy was treated in near-dry powder-mixed medium conditions with the graphite electrode and copper electrode by electrical sparking. The effects of different electrode on micro-structure, micro-hardness, and the wear resistance of strengthened layers were analyzed and investigated. The results show that multi-strengthening can make layer more compact, and the thickness of the layer more uniform, that is improving the surface quality, remarlablely. The micro-hardness of the layer is measured to be about 1 500 HV, and the relative wear loss of multi-strengthening surface is27% of raw materials. The micro-hardness and wear resistance of the strengthened layers are improved significantly.
引文
[1]周永权,谭业发,赵洋,等.电火花表面强化技术及其应用[J].机械研究与应用,2010(1):159-162.
[2]谢炜,林有希,相泽峰.电火花表面强化技术研究与发展[J].材料开发与应用,2014,26(2):63-67.
[3]陈钟燮.电火花表面强化工艺[M].北京:机械工业出版社,1987.
[4]Katsushi F,Akinorisaneto H,Hideki T,et al.Accretion of titanium carbide by electrical discharge machining with powder suspended in working fluid[J].Precision Engineering,2001,25:138-144.
[5]Peca P,Henriques E.Influence of silicon powder-mixed dielectric on conventional electrical discharge machining[J].International Journal of Machine Tools&Manufacture,2003,43:1465-1471.
[6]Furutani K,Sato H,Suzuki M.Influence of electrical conditions on performance of electrical discharge machining with powder suspended in working oil for titanium carbide deposition process[J].The International Journal of Advance Manufacture Technology,2009,40(11-12):1093-1101.
[7]李敏,王宏伟,蔡兰蓉,等.电火花表面强化TC4钛合金的组织与性能[J].宇航材料工艺,2013(3):95-99.
[8]Dong C,Zhang J,Xu J,et al.Microstructures and properties of electrical discharge strengthened layers on 65Mn steel[J].Applied Surface Science,2011,257:2843-2849.
[9]梁璞,王洪祥,余兵涛.电火花表面强化技术的研究现状[J].机械工程师,2012(8):100-102.
[10]Yang G,Zhao Y.New advances in titanium alloy research[J].Processing and Applications Materials Review,2001,15(10):19-21.
[11]狄玉丽.钛及钛合金的性质及表面处理技术探讨[J].科技创新与应用,2014(23):18-19.
[2]谢炜,林有希,相泽峰.电火花表面强化技术研究与发展[J].材料开发与应用,2014,26(2):63-67.
[3]陈钟燮.电火花表面强化工艺[M].北京:机械工业出版社,1987.
[4]Katsushi F,Akinorisaneto H,Hideki T,et al.Accretion of titanium carbide by electrical discharge machining with powder suspended in working fluid[J].Precision Engineering,2001,25:138-144.
[5]Peca P,Henriques E.Influence of silicon powder-mixed dielectric on conventional electrical discharge machining[J].International Journal of Machine Tools&Manufacture,2003,43:1465-1471.
[6]Furutani K,Sato H,Suzuki M.Influence of electrical conditions on performance of electrical discharge machining with powder suspended in working oil for titanium carbide deposition process[J].The International Journal of Advance Manufacture Technology,2009,40(11-12):1093-1101.
[7]李敏,王宏伟,蔡兰蓉,等.电火花表面强化TC4钛合金的组织与性能[J].宇航材料工艺,2013(3):95-99.
[8]Dong C,Zhang J,Xu J,et al.Microstructures and properties of electrical discharge strengthened layers on 65Mn steel[J].Applied Surface Science,2011,257:2843-2849.
[9]梁璞,王洪祥,余兵涛.电火花表面强化技术的研究现状[J].机械工程师,2012(8):100-102.
[10]Yang G,Zhao Y.New advances in titanium alloy research[J].Processing and Applications Materials Review,2001,15(10):19-21.
[11]狄玉丽.钛及钛合金的性质及表面处理技术探讨[J].科技创新与应用,2014(23):18-19.