马钢耐火钢高温下材料性能试验研究  

An experimental study on high-temperature properties of fire-resistant steel made by Masteel

作　　者：蒋首超[1] 陆立新[1] 李国强[1] 沈俊昶[2] 吴保桥[3] 吴结才[3] 

机构地区：[1]同济大学,上海200092 [2]钢铁研究总院,北京100081 [3]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243003

出　　处：《土木工程学报》2006年第8期72-75,共4页China Civil Engineering Journal

基　　金：国家自然科学基金(50308019)

摘　　要：为了得到高温下耐火钢的材料特性,对马钢集团开发的耐火钢在高温下的力学性能进行了试验研究。通过高温下的恒温加载拉伸试验,得到不同温度下耐火钢的屈服强度、极限强度、延伸率、面缩率和应力-应变关系,并测定高温下耐火钢的热膨胀系数,采用悬丝耦合共振法测定高温下耐火钢的初始弹性模量。试验表明,马钢耐火钢在600℃时的屈服强度大于常温下的2/3,弹性模量大于常温下的3/4。通过对试验结果的分析,拟合得到耐火钢的各力学指标参数随温度变化的计算公式,这些公式可用于耐火钢结构抗火性能的分析与设计。Experiments are carried out to determine the high-temperature mechanical properties, such as yield strength, tensile strength, elongation, Poisson ratio and stress-strain relationship, of fire-resistant steel made by the Maanshan Iron ＆ Steel Co. Ltd.. A coupled vibration method on suspended free poles is employed to determine the initial Young＇s modulus at elevated temperatures, also the thermal expansion coefficients of fire-resistant steel. Test results indicate that the yield strength of fire-resistant steel at 600℃ is higher than the yield strength at ambient temperature by two thirds, and the initial Young＇s Modulus at 600℃ is higher than of that at ambient temperature by three quarters. In conclusion, the functions of coefficients for mechanical properties of fire-resistant steel under variable temperatures are developed by using a regression analysis.

关 键 词：高温 试验 力学性能 耐火钢 

分 类 号：TU541[建筑科学—建筑技术科学]