20SiMn低合金钢和0Cr13Ni5Mo不锈钢的多相流损伤行为  

CAVITATION-ABRASION BEHAVIOR OF 20SiMn AND 0Cr13Ni5Mo STEELS IN MULTIPHASE FLOW

作　　者：柳伟[1] 郑玉贵[1] 刘常升[2] 姚治铭[1] 柯伟[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室 [2]东北大学

出　　处：《材料研究学报》2002年第6期585-589,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金重点资助项目59831030;国家重点基础研究专项经费资助项目G19990650

摘　　要：对水轮机用金属材料20SiMn低合金钢和0Cr13Ni5Mo不锈钢进行了旋转圆盘仪空蚀和冲刷磨损单元和组合多相流损伤实验.结果表明, 20SiMn低合金钢和0Cr13Ni5Mo不锈钢的冲刷磨损及空蚀和冲刷磨损联合作用损伤累积质量损失-时间曲线均呈线性关系,空蚀和冲刷磨损联合作用对材料所造成的损伤显著高于空蚀和冲刷磨损单独作用,空蚀和冲刷磨损的交互作用在空蚀和冲刷磨损联合作用中起重要的作用;在空蚀和冲刷磨损联合作用中,液体空化及随后的空泡溃灭改变了流体中固相颗粒的运动方向,引起固相颗粒的流速增加和攻角改变,从而加剧了固相颗粒对材料表面的损伤.Cavitation-abrasion behaviors of 20SiMn and 0Cr13Ni5Mo steels in multiphase flow have been investigated by using a rotating disc equipment. The eroded surfaces were observed by scanning electron microscopy. The profiles of eroded surfaces were measured by a profilograph, and roughness values Ra were calculated based on the profile curves. The results showed that abrasion and cavitation-abrasion cumulative mass loss exhibited linear relations with experiment time, cavitation-abrasion damaged materials much more seriously than single action of cavitation erosion or abrasion, and the synergism between cavitation erosion and abrasion played an important role in cavitation-erosion; the flowing direction of solid particles were changed for vapour bubbles produced in cavitated liquid collapsing, and this increased the flowing speed and changed incidence angles of solid particles so that the damage to materials was promoted.

关 键 词：20SIMN低合金钢 0Cr13Ni15Mo不锈钢 多相流 损伤行为 空蚀 冲刷磨损 联合作用 交互作用 

分 类 号：TG172.9[金属学及工艺—金属表面处理] TG11[金属学及工艺—金属学]