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与本文的相同.通过对比可以看出,腐蚀后空蚀试样的累积质量损失明显小于未腐蚀试样的累积质量损失,且累积质量损失率也由于腐蚀作用而明显减小.结果表明,NaCl溶液的腐蚀作用使试样的抗空蚀能力增强. 图3 试样表面微观形貌随空蚀时间的变化(s=0.5 mm) Fig. 3 Variation of surface morphology with cavitation erosion time (s...3中所示的空蚀发展相对滞后,空蚀由于腐蚀而得到抑制.这是由于腐蚀后试样表面形成的蚀坑在成为裂纹起源的同时,驻留住的稳定存在的蒸馏水具有"水垫"作用,对空泡溃灭产生的能量有缓冲作用. 图4 不同空蚀时间试样表面的轮廓图(s=0.5 mm) Fig. 4 Profiles at different cavitation erosion time (s=0.5 mm) 2.1.3 空蚀试样的三维表面轮......
; 文献标识码:A Cavitation erosion behaviour of NiCrSiB coatings on CrNiMo stainless steel by laser cladding ZHANG Xiao-bin, ZANG Chen-feng, CHEN Sui-yuan, LIU Chang-sheng (School of Materials.... The phases of the cladding layer were investigated by using XRD; the cavitation erosion behavior of the cladding layer and CrNiMo stainless steel was investigated by ultrasonic vibration cavitation erosion......
杆采用螺纹连接,试样端面(d 16 mm)浸入液面3 mm,如图1所示.空蚀前将试样的涂层表面采用金相砂纸打磨,使其表面粗糙度Ra≤0.2 μm. 图1 超声振动空蚀试验机原理图 Fig. 1 Schematic diagram of ultrasonic vibration cavitation erosion tester 2 结果与分析...(a) and CC(b) after 0.25 h cavitation erosion 涂层的空蚀源形成后,在气泡溃灭产生的交变应力反复作用下,裂纹会逐步向涂层内部扩展.由于涂层的空蚀失效是典型的疲劳破坏,因此裂纹的扩展速度主要取决于涂层的开裂韧性,因为微纳米WC-CoCr涂层的开裂韧性比普通涂层的高45%,这使微裂纹在微纳米涂层中扩展的阻力更大,速度更慢,图8所示为HVOF制备的2种WC-10Co4Cr涂层在......
Cavitation-erosion mechanism of laser cladded SiC particle reinforced metal matrix composite ZHANG Chun-hua(张春华)1, 2, 3, ZHANG Song(张 松)1, YANG Hong-gang(杨洪刚)1, ZHU Sheng-long(朱圣龙)2, MAN Hau... electronic microscope(SEM-EDX) and X-ray diffractometer(XRD). The performance of electrochemical corrosion and cavitation erosion and their mechanism were estimated by the microhardness tester......
Resistance of cavitation erosion of multimodal WC-12Co coatings sprayed by HVOF DING Zhang-xiong1, CHEN Wei1, WANG Qun2 1. College of Energy & Power Engineering, Wuhan University... to cavitation erosion was studied by ultrasonic vibration cavitation equipment. Cavitation pits and craters were observed by SEM and cavitation mechanisms were explored. The results show......
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Cavitation Erosion Corrosion Behaviour of Manganese-nickel-aluminum Bronze in Comparison with Manganese-brassHong Yu, Yugui Zheng? and Zhiming Yao State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Acadamy of Sciences, Shenyang 110016, China摘 要:The cavitation erosion corrosion behaviour of ZQMn12-8-3-2 manganese......