Cr-Mn-N奥氏体-铁素体不锈钢的空蚀行为  

CAVITATION EROSION BEHAVIOR OF Cr-Mn-N AUSTENITE-FERRITE STAINLESS STEEL

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,沈阳110016 [2]东北大学材料与冶金学院,沈阳110004

出　　处：《金属学报》2003年第1期85-88,共4页Acta Metallurgica Sinica

基　　金：国家自然科学基金重点项目59831030;国家重点基础研究发展规划项目资助G19990650

摘　　要：利用超声振荡空蚀实验机对Cr-Mn-N奥氏体-铁素体不锈钢进行了空蚀研究.结果表明,低硬度Cr—Mn—N不锈钢的抗空蚀性能高于高硬度的0Cr13Ni5Mo不锈钢.空蚀过程中, Cr—Mn—N奥氏体-铁素体不锈钢中的铁素体优先脱落,空蚀表面的铁素体含量由19％迅速降低到6.9％后保持稳定.奥氏体易于在铁素体脱离后形成的蚀坑处开始脱落.加工硬化是该不锈钢吸收空蚀冲击能量的一个重要途径,是其硬度较低却表现出良好抗空蚀性能的重要原因.The cavitation erosion behavior of Cr-Mn-N austenite-ferrite stainless steel was investigated by ultrasonic vibration cavitation erosion equipment. The results show that the resistance of Cr-Mn-N stainless steel to cavitation erosion is superior to that of 0Cr13Ni5Mo stainless steel although Cr-Mn-N stainless steel has lower hardness. The ferrite phase in the surface of Cr-Mn-N steel is quickly removed when it is damaged by cavitation erosion, and its volume content in the surface of Cr-Mn-N steel quickly decreased from 19% to 6.9%, then keeps invariable. The austenite is prone to remove from the pits left by ferrite removal. Work hardening is an important way for Cr-Mn-N stainless steel to absorb cavitation erosion impact energy, which makes,Cr-Mn-N stainless steel exhibit superior resistance,to cavitation erosion.

关 键 词：Cr-Mn-N奥氏体-铁素体不锈钢 空蚀 加工硬化 水轮机 过流部件 

分 类 号：TG172.9[金属学及工艺—金属表面处理] TG142.71[金属学及工艺—金属学]