个人信息Personal Information
教授
博士生导师
硕士生导师
性别:女
毕业院校:大连理工大学
学位:博士
所在单位:材料科学与工程学院
学科:材料物理与化学
办公地点:三束实验室2号楼302室
联系方式:0411-84708380-8302
电子邮箱:lixiaona@dlut.edu.cn
The effect of thermal aging on tensile property of HR3C steel
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论文类型:会议论文
发表时间:2009-01-01
收录刊物:CPCI-S
页面范围:343-346
关键字:HR3C; High-temperature mechanical properties; High temperature short time tensile test; Aging
摘要:HR3C (25Cr-20Ni-Nb-N) is a new austenitic steel used as superheat and reheater tubes in Ultra-supercritical Boiler. The purpose of this paper is to research the steel's high-temperature mechanical properties and the effects of precipitates after thermal aging by the high temperature short time tensile. The experimental materials were supply state specimens and thermal aging specimens. The experiment temperatures were 650 degrees C and 750 degrees C. The results showed that the yield strengths of thermal aging HR3C Were superior to the supply state specimens. The optical microstructure of thermal aging specimen showed that there were numerous precipitates along the intergranulars and in the intracrystallines. It indicated that these precipitations increased yield strength of the thermal aging specimen. There was an interesting result obtained from the stress-strain curves only considering the temperature influence. The supply state specimen has preferable plasticity at the lower temperature. This abnormal phenomenon was resulted in precipitates along the grain boundaries when this state specimen was tested at higher temperature.