復(fù)合涂層摩擦學(xué)特性
( 1. 上海交通大學(xué) 材料學(xué)院， 上海 200030；
2. 裝甲兵工程學(xué)院 裝備再制造技術(shù)國(guó)防科技重點(diǎn)實(shí)驗(yàn)室， 北京 100072；
3. 中國(guó)科學(xué)院 蘭州化學(xué)物理研究所 固體潤(rùn)滑國(guó)家重點(diǎn)實(shí)驗(yàn)室， 蘭州 730000)
摘 要: 使用THT07-135高溫磨損實(shí)驗(yàn)機(jī)對(duì)高速電弧噴涂FeAl, Fe-Al/Cr3C2，F(xiàn)eAlCr/Ni包Cr3C2復(fù)合涂層進(jìn)行了滑動(dòng)摩擦特性的研究，并用SEM、TEM、XRD等手段觀察分析了磨痕的形貌和成分、涂層截面的組織和相結(jié)構(gòu)。 結(jié)果表明：FeAlCr/Ni包Cr3C2復(fù)合涂層具有典型的層狀結(jié)構(gòu)和較高的結(jié)合強(qiáng)度和硬度；從室溫到250 ℃，涂層的抗磨損性能下降；從250 ℃到550 ℃，涂層磨損性能變化不大；550 ℃以后，涂層的耐磨損性能重新增強(qiáng)；剝層磨損是FeAlCr/Ni包Cr3C2涂層高溫磨損的主要機(jī)理；Cr3C2增強(qiáng)相的加入，大大提高了涂層的耐磨損性能；Ni的加入一定程度提高了涂層的結(jié)合強(qiáng)度和抗磨損性能。
關(guān)鍵字: 高速電弧噴涂； 摩擦學(xué)特性； FeAlCr/Ni包Cr3C2復(fù)合涂層
WU Yi-xiong1, LIU Wei-min3
（ 1. School of Materials Science and Engineering， Shanghai Jiaotong University，Shanghai 200030, China;
2. National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, China;
3. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences, Lanzhou 730000, China）
Abstract: THT07-135 high temperature wear machinery was used to analyse tribological properties of high velocity arc sprayed FeAl, Fe-Al/Cr3C2, FeAlCr/Ni wrapped Cr3C2 composite coatings. The wear scar morphologies and compositions of coatings were analyzed by SEM, TEM and XRD methods. Results show that FeAlCr/Ni wrapped Cr3C2 composite coatings have typically layer shaped structure and relatively high bonding strength and hardness. The wear resistance of coatings decreases in the range from room temperature to 250 ℃, and it changes little in the range from 250 ℃ to 550 ℃, then wear resistance of coatings rises again after 550 ℃.Shell tribology behavior is mainly the high temperature wear mechanism of coatings. The addition of Cr3C2 can improve the wear resistance of coatings highly; the addition of Ni can also relatively enhance bonding strength and wear properties of coatings.
Key words: high velocity arc spray； tribological characteristic; FeAlCr/Ni wrapped Cr3C2 composite coating
