水轮机级钢固体颗粒冲击侵蚀的实验研究

IF 1.6 Q4 MATERIALS SCIENCE, COATINGS & FILMS

Tribology - Materials, Surfaces & Interfaces Pub Date : 2022-07-03 DOI:10.1080/17515831.2021.2005995

Shubham Sharma, B. Gandhi

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引用次数: 1

摘要

摘要：目前的工作是通过使用高速锅式试验机来了解悬浮沉积物对水轮机钢的侵蚀。实验在13-32的五种不同速度下进行 m/s，四种不同的平均粒径为143–362.5 μm，砂浓度为3000 ppm。使用角盘，磨损试样的方位角从15°到90°不等。已经开发了切削和变形的相关性来估计总侵蚀磨损。通过对侵蚀表面的扫描电镜分析，研究了侵蚀机理。对于切削磨损率和变形磨损率，CA6NM钢的速度指数分别为2.07和2.14，显著高于在低速范围内观察到的速度指数。所建立的相关性可进一步用于侵蚀的数值估计。图形摘要

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Experimental study on erosion of hydro-turbine grade steels due to solid particle impact

ABSTRACT The present work has been performed to understand the erosion of hydro-turbine steels due to the impact of suspended sediment using a high-speed pot tester. Experiments have been performed at five different velocities of 13–32 m/s and four different mean particle sizes of 143–362.5 μm for the sand concentration of 3000 ppm. The orientation angle of the wear specimens was varied from 15° to 90° using an angular disc. Correlations for cutting and deformation have been developed to estimate the total erosion wear. The erosion mechanisms are also studied by scanning electron micrographic analysis of the eroded surface. The velocity exponent for CA6NM steel is observed as 2.07 and 2.14 for cutting and deformation wear rates, respectively, significantly higher than that observed at low velocity ranges. The correlation developed may be further used for numerical estimation of erosion. GRAPHICAL ABSTRACT

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来源期刊

Tribology - Materials, Surfaces & Interfaces MATERIALS SCIENCE, COATINGS & FILMS-

CiteScore

2.80

自引率

0.00%

发文量