学位：博士
职称：教授
所在单位：材料科学与工程学院
长期从事金属材料蠕变、组织演化、损伤及寿命预测工作。主持和参加国家自然科学基金重点和面上项目6项，“863”计划课题2项，省部级及企业项目20余项。获国家发明专利5项，发表学术论文200余篇。出版专著“耐热钢持久性能的统计分析及可靠性预测”1部（科学出版社），译著“高温合金”1部，编著1部。获辽宁省教学名师，宝钢教育奖优秀教师奖。辽宁省教学成果一等奖1项，国家本科一流课程、国家精品在线开放课程负责人。Emerald出版社颁发的学术奖“Literati Club Awards for Excellence”，金属学报2009-2015年度优秀论文奖。省部级科技奖励一等奖、二等奖5项。
Precipitation in 25Cr20NiNbN austenitic steel after ageing at 750 degrees C
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论文类型：期刊论文
发表时间：2015-09-01
发表刊物：MATERIALS AT HIGH TEMPERATURES
收录刊物：SCIE、EI、Scopus
卷号：32
期号：5
页面范围：461-467
ISSN号：0960-3409
关键字：Austenitic steel; Thermal ageing; Precipitation
摘要：The heat-resistant austenitic steel 25Cr20NiNbN (HR3C) has been widely used in super heater and re-heater tubes in ultra-supercritical (USC) boilers. The precipitation processes in the steel are complicated because of its high alloy element contents. Precipitation in a 25Cr20NiNbN steel has been investigated after thermal aging at 750 degrees C for period from 500 to 3000 h. The results indicate that M23C6 carbides generally precipitate along grain boundaries and that the major intragranular precipitates are NbCrN nitrides and M23C6 carbides. More precipitates are observed in the specimens after long term aging treatment: NbCrN nitrides on grain boundaries, as well as Cr3Ni2SiC carbides, have been found in the sample after aged for 2000 h at 750 degrees C. The formation of sigma phase has also been confirmed in the current steel after long term aging based on the results of X-ray diffraction (XRD), SEM and chromogenic methods.
发表时间：2015-09-01
