Influence of Mo Content on Microstructure and Mechanical Properties of Fire-Resistant Construction Steel

摘要：

In order to ensure fire-resistant property of the steel under the condition of the least molybdenum content， effects of molybdenum on microstructure and properties of the fire-resistant construction steel，specially on high temperature strength were investigated. The results show that the room temperature and high temperature strength of the steel is enhanced due to increased Mo content but the impact toughness deteriorates at the same time. The fraction of bainite in the microstructure increases with increasing Mo content while the fractions of polygonal ferrite and pearlite decrease. Comparing with the steel of adding Nb alone, it was obvious that combined addition of Mo and Nb could provide better effect in high temperature strengthening. Addition of 0.25mass％ Mo in the steel containing Nb could meet fire-resistant requirements of the construction steel and provide better economical effectiveness.

关键词： fire-resistant construction steel high temperature strength microstructure precipitate Molybdenum

作者: TONG Mingwei YUAN Zexi ZHANG Kaiguang RUI Xiaolong

作者单位: School of Materials and Metallurgy,Wuhan University of Science & Technology Wuhan 430081, Hubei,Chin School of Materials and Metallurgy,Wuhan University of Science & Technology Wuhan 430081, Hubei,Chin Research and Development center of Wuhan Iron & Steel (Group) Corp.，Wuhan 430080,Hubei,China

会议类型: 国际会议

会议名称: The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)

会议地点: 北京

会议语种:英文

页码: 620-624

在线出版日期: 2011-05-31（万方平台首次上网日期，不代表论文的发表时间）