本文關(guān)鍵詞： 激光熔覆 復(fù)合涂層 時(shí)效處理 組織與性能 高溫穩(wěn)定性　出處：《應(yīng)用激光》2015年06期 　論文類型：期刊論文

【摘要】：以Ni60-10%hBN(質(zhì)量分?jǐn)?shù)/%)復(fù)合粉末為原料,采用激光熔覆技術(shù)在TC4合金表面成功制備出了γ-Ni/TiC/TiB2+CrB-Ni3B/hBN高溫自潤(rùn)滑耐磨復(fù)合涂層。在600℃下分別將該復(fù)合涂層保溫10、30、50h,研究不同時(shí)長(zhǎng)的高溫時(shí)效處理后該復(fù)合涂層的物相、組織形貌、顯微硬度和摩擦學(xué)性能的變化及其機(jī)理。結(jié)果表明,高溫時(shí)效處理前后復(fù)合涂層的物相組成基本不變,高溫時(shí)效處理50h后的涂層平均顯微硬度由時(shí)效處理前的1162HV0.2降為910HV0.2;涂層的摩擦系數(shù)及磨損率由時(shí)效處理前的0.225和4.85×10-6 mm3/Nm分別升高到0.375和5.35×10-6 mm3/Nm,但相較于基體仍然具有良好的耐磨減摩性能,在600℃下長(zhǎng)時(shí)間時(shí)效處理后,該復(fù)合涂層的物相、組織和摩擦學(xué)性能都表現(xiàn)出良好的高溫穩(wěn)定性。
[Abstract]:Using Ni60-10hBN composite powder as raw material, 緯 -Ni / TiC / TiB2 CrB-Ni3B/hBN high temperature self-lubricating and wear resistant composite coatings were successfully prepared on the surface of TC4 alloy by laser cladding technique. The change of microhardness and tribological properties and its mechanism. The results show that the phase composition of the composite coating is basically unchanged before and after high temperature aging treatment. The average microhardness of the coating decreased from 1162HV0.2 to 910HV0.2, and the friction coefficient and wear rate of the coating increased from 0.225 and 4.85 脳 10-6 mm3/Nm to 0.375 and 5.35 脳 10-6 mm / Nm, respectively. Good friction and wear resistance, After aging at 600 鈩，

本文編號(hào)：1502766