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.
作者
朱世佳
ZHU Shijia(Aviation Safety and Fire Research Center Materials Department, Civil Aviation Flight University, Guanghan 618307, Chin)
出处
《热加工工艺》
CSCD
北大核心
2018年第14期68-71,共4页
Hot Working Technology
关键词
耐火钢
微量元素
组织
性能
refractory steel
trace elements
microstructure
properties
