镁合金表面冷喷涂纳米WC-17Co涂层及其性能
发布时间：2018-08-09 17:53
【摘要】：采用冷喷涂和超音速火焰喷涂(HVOF)在AZ80镁合金表面制备了纳米WC-17Co涂层。利用SEM分析了原始粉末形貌、喷涂粒子沉积行为及涂层显微结构,并采用球盘式摩擦磨损实验机考察了涂层的摩擦磨损性能。结果表明:采用冷喷涂工艺可在AZ80镁合金基体上制备出高质量的WC-17Co涂层,涂层的显微硬度为(1 380±82)HV,磨损率为9.1×10-7 mm3/Nm,其耐磨性较HVOF制备的WC-17Co涂层提高了1倍,较镁合金基材提高了3个数量级。研究表明,冷喷涂WC-17Co涂层在不对镁合金基体产生热影响的情况下,可以显著提高镁合金的表面性能,是一种新型镁合金表面强化工艺。
[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 卤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.
【作者单位】： 中国兵器科学研究院宁波分院焊接与表面再制造技术研究室;浙江大学材料科学与工程学院;
【基金】：宁波市科技创新团队基金(2014B82001) 中国博士后科学基金(2015M581964)~~
【分类号】：TG174.4
，
本文编号：2174852
[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 卤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.
【作者单位】： 中国兵器科学研究院宁波分院焊接与表面再制造技术研究室;浙江大学材料科学与工程学院;
【基金】：宁波市科技创新团队基金(2014B82001) 中国博士后科学基金(2015M581964)~~
【分类号】：TG174.4
，
本文编号：2174852
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2174852.html
