ISSN   1004-0595

CN  62-1095/O4

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黄伟九, 何浩然, 王振国, 高丹丹, 周永涛, 王军军. 多相流作用下锡黄铜的空蚀-冲蚀行为[J]. 摩擦学学报, 2018, 38(4): 410-416. DOI: 10.16078/j.tribology.2018.04.005
引用本文: 黄伟九, 何浩然, 王振国, 高丹丹, 周永涛, 王军军. 多相流作用下锡黄铜的空蚀-冲蚀行为[J]. 摩擦学学报, 2018, 38(4): 410-416. DOI: 10.16078/j.tribology.2018.04.005
HUANG Weijiu, HE Haoran, WANG Zhenguo, GAO Dandan, ZHOU Yongtao, WANG Junjun. Cavitation and Erosion Behavior of Tin Brass in Multiphase Flow[J]. TRIBOLOGY, 2018, 38(4): 410-416. DOI: 10.16078/j.tribology.2018.04.005
Citation: HUANG Weijiu, HE Haoran, WANG Zhenguo, GAO Dandan, ZHOU Yongtao, WANG Junjun. Cavitation and Erosion Behavior of Tin Brass in Multiphase Flow[J]. TRIBOLOGY, 2018, 38(4): 410-416. DOI: 10.16078/j.tribology.2018.04.005

多相流作用下锡黄铜的空蚀-冲蚀行为

Cavitation and Erosion Behavior of Tin Brass in Multiphase Flow

  • 摘要: 采用空蚀-冲蚀联合作用试验机测试和扫描电镜(SEM)分析相结合研究了锡黄铜的空蚀-冲蚀行为,考察了水流速度和沙粒对铜合金空蚀-冲蚀行为的影响. 研究表明:锡黄铜的抗空蚀能力随水流速度增加而降低,当水流速度增加到一定值时,合金的抗空蚀能力降低幅度减缓,这归因于水流的冲击导致的材料表面硬化;通过铜合金质量损失率曲线分析可知:本文试验条件下锡黄铜在不同流速下的空蚀过程主要包含孕育期、上升期和稳定期;固体颗粒(沙粒)对锡黄铜的抗空蚀能力有不利影响,铜合金在含沙水中的质量损失显著高于同等条件自来水中,这主要是由于在空蚀过程中沙粒的冲击破坏所造成. 观察试验后样品表面形貌,发现合金表面有由空蚀/冲蚀作用所造成的唇片、凹坑和沟槽等特征形貌.

     

    Abstract: The influence of flow rate and particle on cavitation and erosion of tin brass in multiphase flow was investigated by using a scanning electron microscopy and a rotating disk system. Results show that the cavitation resistance decreased with increasing liquid flow rate, but magnitude of decrease reduced after a threshold liquid velocity due to surface hardening induced by impact of the current. The cavitation erosion process can be divided into three stages, i.e. incubation, accumulation and steady periods, through analysis of the curve of quality loss rate. Mass loss was significantly higher in liquid-solid flow than in water showing negative effect of particle on the cavitation erosion resistance. Some characteristic morphologies produced by cavitation and erosion, e.g. pits, shear lips, groove were observed by carefully analyzing the tested surface.

     

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