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。
Microstructural analysis of Cr35Ni45Nb heat-resistant steel after a five-year service in pyrolysis furnace
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论文类型：期刊论文
发表时间：2017-09-01
发表刊物：ENGINEERING FAILURE ANALYSIS
收录刊物：SCIE、EI、Scopus
卷号：79
页面范围：625-633
ISSN号：1350-6307
关键字：Cr35Ni45Nb heat-resistant steel; Carbide; Carburization; Oxidation; Cr-depleted zone
摘要：To analyze the microstructure across thickness exposed to various environment of the pyrolysis furnace tubes, the sample of Cr35Ni45Nb heat-resistant steel from a five-year service tube was sliced into slices from inner to outer wall. Moreover, microhardness was examined to investigate the influence of the microstructure on the property of the heat-resistant steel. The results show that the primary carbides Cr7C3 and NbC have transformed into chromium-rich Cr23C6 and niobium-rich carbides G phase in the middle section of the aged pyrolysis furnace tube. The Cr2O3 and SiO2 layer covered the outer and inner surfaces, and the Cr-depleted zones were formed under the oxide layer of the inner and outer walls. The carbides of M23C6 were transformed into M7C3 type carbides in the carburization zone under the Cr-depleted zone of inner surface, while the M7C3 type carbides also existed under the Cr-depleted zone of outer wall.
发表时间：2017-09-01
