摘要
在Ｃｒ—Ｍｎ—Ｎ奥氏体钢空蚀损伤的样品表面出现了高温 η－Ｎｉ３Ｔｉ相和尺寸约为 ３０ｎｍ的纳米晶前者是空蚀过程中的热效应所致，后者则是机械和热效应共同作用的结果推测在 Ｃｒ—Ｍｎ—Ｎ奥氏体钢空蚀试验时可能出现 １１００Ｋ左右的瞬时高温发展抗空蚀材料除了应考虑常温组织和性能外，还应考虑材料的高温组织。
High--temperatureηNi3Ti and nanocrystallized structure (about 30nm grain) were found in cavitation erosion specimens of Cr--Mn--N austenic steel. The former phenomenon was considered as the result of thermal effect in the cavitation erosion procedure, the presentation of nanocrystallized structure was caused by both the thermal and mechanical effects of cavitation erosion. It was estimated that cavitation erosion specimens of Cr--Mn--N austenic steel should have undergone transient high temperature of about 1100K in the cavitation erosion procedure. To develop new cavitationresistant materials. the high temperature structure. properties and thermal fatigue property should also be taken into account besides the normal temperature structure and properties.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2001年第3期287-290,共4页
Chinese Journal of Materials Research
关键词
空蚀
热效应
纳米晶
高温相
奥氏体钢
cavitation erosion, thermal effect, nanocrystalline, high temperature phase
