【摘要】：采用冷噴涂和超音速火焰噴涂(HVOF)在AZ80鎂合金表面制備了納米WC-17Co涂層。利用SEM分析了原始粉末形貌、噴涂粒子沉積行為及涂層顯微結(jié)構(gòu),并采用球盤式摩擦磨損實(shí)驗(yàn)機(jī)考察了涂層的摩擦磨損性能。結(jié)果表明:采用冷噴涂工藝可在AZ80鎂合金基體上制備出高質(zhì)量的WC-17Co涂層,涂層的顯微硬度為(1 380±82)HV,磨損率為9.1×10-7 mm3/Nm,其耐磨性較HVOF制備的WC-17Co涂層提高了1倍,較鎂合金基材提高了3個(gè)數(shù)量級(jí)。研究表明,冷噴涂WC-17Co涂層在不對(duì)鎂合金基體產(chǎn)生熱影響的情況下,可以顯著提高鎂合金的表面性能,是一種新型鎂合金表面強(qiáng)化工藝。
[Abstract]:Nano-sized (HVOF) coatings were prepared on AZ80 magnesium alloys by cold spraying and supersonic flame spraying. The morphology of the original powder, the deposition behavior of the sprayed particles and the microstructure of the coating were analyzed by SEM. The friction and wear properties of the coating were investigated by a ball disk friction and wear tester. The results show that high quality WC-17Co coating can be prepared on AZ80 magnesium alloy substrate by cold spraying. The microhardness of the coating is (1 380 鹵82) HVV, the wear rate is 9.1 脳 10 ~ (-7) mm / 3 / Nm, and the wear resistance of the coating is twice as high as that of WC-17Co coating prepared by HVOF. Compared with the magnesium alloy substrate, it increased by 3 orders of magnitude. The results show that cold sprayed WC-17Co coating can significantly improve the surface properties of magnesium alloy without heat effect on the substrate of magnesium alloy. It is a new type of magnesium alloy surface strengthening process.
【作者單位】： 中國(guó)兵器科學(xué)研究院寧波分院焊接與表面再制造技術(shù)研究室;浙江大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：寧波市科技創(chuàng)新團(tuán)隊(duì)基金(2014B82001) 中國(guó)博士后科學(xué)基金(2015M581964)~~
【分類號(hào)】：TG174.4
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本文編號(hào)：2174852