(中南工業(yè)大學 粉末冶金國家重點實驗室, 長沙 410083)
摘 要: 針對TiAl基合金排氣門在483Q柴油發(fā)動機臺架試驗后桿部產生局部磨損的情況, 進行了TiAl基合金表面噴涂Mo和WC的摩擦磨損試驗研究。結果表明: TiAl基合金表面與Mo 和WC涂層間的結合方式為機械咬合; TiAl基合金表面噴涂Mo能顯著提高其耐磨性, 磨損量減少50%; 噴涂WC使硬度提高30%,但耐磨性下降, 磨損量上升30%。
關鍵字: 摩擦; 發(fā)動機; TiAl基合金;等離子噴涂
(State Key Laboratory for Powder Metallurgy,Central South University of Technology, Changsha 410083, P.R.China)
Abstract:The tribological performance of plasmasprayed Mo and WC on TiAlbased alloy surface was studied to improve TiAlbased alloy's antiwear properties.Theresults show that the wear mass loss decreases by 50% through the spray of Mo. The hardness of TiAlbased alloy increases by 30% through the spray of WC, andthe wear mass loss increases by 30%.
Key words: friction; engine; TiAlbased alloy; plasmaspray


