微量元素对建筑用耐火钢的组织与性能的影响  

Effects of Trace Elements on Microstructure and Properties of Building Fire-resistant Steel

作　　者：朱世佳 ZHU Shijia(Aviation Safety and Fire Research Center Materials Department, Civil Aviation Flight University, Guanghan 618307, Chin)

机构地区：[1]中国民用航空飞行学院航空安全与消防研究中心材料系

出　　处：《热加工工艺》2018年第14期68-71,共4页Hot Working Technology

摘　　要：设计了不同成分的Mo＋B＋Ti系列耐火钢和Mo系列耐火钢。分析了不同微合金化元素V、Nb等的添加对实验用钢常温、600℃力学性能和显微组织的影响。结果表明：在Nb和V含量相同的条件下,Mo＋B＋Ti系列耐火钢的抗拉强度都要高于Mo系列耐火钢。所设计的耐火钢断后伸长率都满足耐火钢塑性的要求。Mo＋B＋Ti系列耐火钢的高温强度要高于Mo系列耐火钢,且复合添加Nb和V的耐火钢具有较高的屈服强度和抗拉强度,V的最佳添加量为0.099%;Mo＋B＋Ti系列实验钢的力学性能满足耐火钢要求,而Mo系列实验钢只有一个钢不满足耐火钢要求。复合添加Nb和V的耐火钢具有较高的室温和高温力学性能,这主要与钢中形成了纳米级（Nb,V）（C,N）相有关。Mo＋B＋Ti series fire-resistant steels and Mo series fire-resistant steels with different components were designed. The effects of different microalloying elements V and Nb on the mechanical properties and microstructure of the experiement steels at room temperature and 600 ℃ were compared. The results show that when the content of V and Nb are the same, the tensile strength of the designed Mo＋B＋Ti series fire-resistant steels is higher than that of Mo series fire-resistant steel s. The elongation of the designed refractory steel can meet the plastic requirements of refractory steels. The high temperature strength of Mo＋B＋Ti series fire-resistant steel is higher than that of Mo series refractory steel, and the refractory steels composite with the addition of Nb and V have higher yield strength and tensile strength, and the optimum addition amount of V is 0.099%. The mechanical properties of Mo＋B＋Ti series experimental steel meet the requirements of refractory steel, while the experimental steel Mo series can meet the requirements of refractory steel expect a steel. The fire-resistant steel with composite addition of Nb and V has higher mechanical properties at room temperature and high temperature, which is mainly related to the formation of nano scale（Nb, V）（C, N） in steel.

关 键 词：耐火钢 微量元素 组织 性能 

分 类 号：TG142[一般工业技术—材料科学与工程]