CrMnN不锈钢的抗空蚀和磨蚀性能

利用旋转圆盘仪对CrMnN不锈钢、20SiMn低合金和OCr13Ni5Mo不锈钢进行了模拟实际工况条件下的空蚀和腐蚀（空蚀和冲刷磨损联合作用）实验。用失重法评价了三种金属材料的抗空蚀和腐蚀性能，并且扫描电镜观察了空蚀形貌。结果表明，CrMnN不锈钢不仅比目前水轮机转轮用材具有更高的抗空蚀性能。而且也具有很好的抗磨蚀性能。深入研究了CrMnN不锈钢的抗损伤机理。

RESISTANCE TO CAVITATION EROSION AND CAVITATION-ABRASION OF CrMnN STAINLESS STEEL

The resistance to cavitation erosion and cavitation-abrasion (combined action of abrasion and cavitation erosion) of a CrMnN stainless steel was investigated. The tests were carried out by using rotating disc equipment under simulated working conditions. 20SiMn low alloy steel and OCr13Ni5Mo stainless steel, which are now used as materials for rotating wheels of hydroturbines, were also tested under the same conditions as contrast specimens. The properties resistant to cavitation erosion and cavitation-abrasion of the three steels were evaluated by mass-loss method, and cavitation erosion surface morphologies were observed by SEM. The experimental results showed that the CrMnN stainless steel has super resistance to cavitation erosion and cavitation-abrasion to the other two tested steels. Conclusions drawn give a new approach to obtain metallic materials with high resistance to cavitation erosion and cavitation-abrasion used for flowing-handing components of hydroturbines by more researching erosion mechanisms of the CrMnN stainless steel.