控轧控冷型Q550高强钢高温后的力学性能试验研究∗
Experimental Study on Post-fire Mechanical Properties of TMCP Q550 Steel
- 防灾减灾工程学报 2021年第2期 页码：369-375
- 作者机构：
同济大学土木工程学院,上海,200092
- 作者简介：
- 基金信息：国家自然科学基金项目(51878506)资助
DOI：
中图分类号： TU511.3TU502-
纸质出版：2021
- 稿件说明：
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宋林昕,李国强.控轧控冷型Q550高强钢高温后的力学性能试验研究∗[J].防灾减灾工程学报,2021,(2):369-375
Song Lincuan. Experimental Study on Post-fire Mechanical Properties of TMCP Q550 Steel[J]. 2021, (2): 369-375.
摘要
通过升温、降温及冷却后的常温静力拉伸试验，对控轧控冷型(TMCP)Q550 高强钢高温后的力学性能展开试验研究，得到了经历 200~900 ℃之间 9 个不同的过火温度及自然冷却与浸水冷却两种冷却方式后，钢材的表观特征、应力-应变关系与基本力学性能参数，包括弹性模量、屈服强度、抗拉强度及断后伸长率。结果表明，过火温度及冷却方式对 TMCP 型 Q550 钢材弹性模量的影响较小；过火温度超过 600 ℃时，钢材高温后的屈服强度和抗拉强度开始折减；过火温度达到 700 ℃后，钢材的应力-应变曲线皆无屈服平台，不同冷却方式的结果开始呈现差异：随过火温度升高，自然冷却后钢材的强度减小而断后伸长率增大，浸水冷却则相反，且二者差异愈加明显。将试验结果与文献结果对比，发现当过火温度超过 700 ℃时，TMCP 型 Q550 高强钢高温后的力学性能与调质型(QT)Q550 高强钢存在差异，在经历较高的过火温度后，TMCP 钢在自然冷却下的强度折减比 QT 钢严重，浸水冷却下的强度增长程度低于 QT 钢。
Abstract
By procedures of heating，cooling and static tensile test at ambient temperature，an experimental study was carried out to investigate the post-fire mechanical properties of TMCP(ThermoMechanical Controlled Process)Q550 steel. Nine experienced temperatures from 200℃ to 900℃ and two cooling methods，that is，cooling in air and cooling in water，were considered in the experiment. The apparent characteristics，stress-strain relationship and basic mechanical parameters including elastic modulus，yield strength，ultimate strength and ultimate elongation were obtained. The results show that：high-temperature treatment and cooling method have little influence on the elastic modulus of the steel；when the experienced temperature is higher than 600℃ ，the yield strength and ultimatestrength begin to decrease；when the experienced temperature reaches 700℃ or above，the stressstrain curves of the steel have no yielding platform，and the mechanical properties of different cooling methods begin to show differences：as the experienced temperature rises，the strength decreases and the elongation increases after cooling in air，while it shows inverse trend after cooling in water，and the difference of the results between the two cooling methods becomes more obvious. Comparing the test results with literature results，it is found that when the experienced temperature is higher than 700℃ ，the post-fire mechanical properties of TMCP Q550 steel are different from those of QT (Quenched and Tempered)Q550 steel. The reduction of the elastic modulus of TMCP steel is greater than that of QT steel，and the strength of TMCP steel is lower than that of QT steel when the experienced temperature is 900℃.
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references
施刚,石永久,王元清.超高强度钢材钢结构的工程应用[J].建筑钢结构进展,2008,10(4):32-38.Shi G,Shi Y J,Wang Y Q.Engineering application of ultra-high strength steel structures[J].Progress in Steel Building Structures,2008,10(4):32-38.(in Chinese)
王卫永,李国强.高强钢结构抗火设计理论研究进展 [J].工业建筑,2016,46(7):61-67.Wang W Y,Li G Q.Research progress of fire resistance design theory of high strength steel structures[J].Indus? trial Construction,2016,46(7):61-67.(in Chinese)
Wang W Y,Liu T Z,Liu J P.Experimental study on post-fire mechanical properties of high strength Q460 steel[J].Journal of Constructional Steel Research,2015,114:100-109.
Li G Q,Lyu H B,Zhang Ch.Post-fire mechanical properties of high strength Q550 structural steel[C]∥ 11th Pacific Structural Steel Conference,Shanghai:[s.n.],2016.
范圣刚,刘平,石可,等.高温下与高温后Q550D高强钢材料力学性能试验[J].天津大学学报(自然科学与工程技术版),2019,52(7):680-689.Fan Sh G,Liu P,Shi K,et al.Experiment on mechani? cal properties of Q550D high-strength steel exposed to overall stage of fire exposure[J].Journal of Tianjing University(Science and Technology),2019,52(7):680-689.(in Chinese)
李国强,吕慧宝,张超.Q690 钢材高温后的力学性能试验研究[J].建筑结构学报,2017,38(5):109-116.Li G Q,Lyu H B,Zhang Ch.Experimental research on post-fire mechanical properties of Q690 steel[J].Journal of Building Structures,2017,38(5):109-116.(in Chinese)
吕慧宝.国产超500MPa高强度结构钢高温后力学性能研究[D].上海:同济大学,2017.Lyu H B.Research on mechanical properties of domes? tic 500MPa up high strength structural steel after fire [D].Shanghai:Tongji University,2017.(in Chinese)
李大赵,索志光,崔天燮,等.采用TMCP技术的低碳低合金高强钢生产的研究现状及进展[J].钢铁研究学报,2016,28(1):1-7.Li D Zh,Suo Zh G,Cui T X,et al.Research status and progress on production of low carbon-alloying and highstrength steel with TMCP procrss[J].Journal of Iron and Steel Research,2016,28(1):1-7.(in Chinese)
Stroetmann R,K?stner Thoralf,H?lsig André,et al.Mechanical properties and a new design approach for welded joints at high strength steels[C]∥International Conference on Engineering Research and Practice for Steel Construction 2018,Hong Kong:[s.n.],2018.
金属材料拉伸试验第1部分:室温试验方法:GB/T 228.1—2010[s].北京:中国标准出版社,2010.Metallic materials:tensile testing:part 1:method of test at room temperature:GB/T 228.1—2010[s].Bei? jing:Standard Press of China,2010.(in Chinese)
金属材料拉伸试验第2部分:高温试验方法:GB/T 228.2—2015[s].北京:中国标准出版社,2015.Metallic materials:tensile testing:part 2:method of test at elevated temperature:GB/T 228.2—2015[s].Beijing:Standard Press of China,2015.(in Chinese)
朱学仪.钢材热处理手册[M].北京:中国标准出版社,2013.Zhu X Y.Handbook of steel heat treatment[M].Bei? jing:Standard Press of China,2013.(in Chinese)
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