摘要
通过金相显微镜、透射电镜观察,研究了正火温度对建筑耐火钢组织性能的影响。结果表明:正火后耐火钢组织主要为铁素体与M-A岛,M-A岛含量随着正火温度升高而增加,770℃时,M-A岛含量达到最大值,此后M-A岛随温度升高含量降低。随着正火温度的升高,试验钢的抗拉强度升高,正火温度超过770℃后,抗拉强度开始下降。耐火钢的最佳正火温度为770℃。
The influence of normalizing temperature on microstructure and properties of building fire-resistant steel was studied by means of the microscope and transmission electron microscope. The results show that the microstructure of the fire-resistant steel after normalizing is mainly ferrite and M-A islands, M-A island contents increase with normalizing temperature increasing, the M-A island content reaches maximum at 770 ℃, and then the M-A island contents decrease with the increase of temperature. With the increase of normalizing temperature, the tensile strength of the test steel increases. After normalizing temperature over 770℃, the tensile strength begins to decline. The optimum normalizing temperature of the refractory steel is 770℃.
出处
《热加工工艺》
CSCD
北大核心
2017年第18期224-227,共4页
Hot Working Technology
关键词
耐火钢
组织
M-A岛
fire-resistant steel
microstructure
M-A island
