火灾环境对Q345厚板铁素体相含量及硬度的影响  

The Influence of Fire Environment on Ferrite Phase Content and Hardness of Q345 Thick Pate

作　　者：徐浩 缑瑞宾 王念 于敏 XU Hao;GOU Ruibin;Wang Nian;YU Min(College of Mechanical Engineering,Anhui Science and Technology University,Fengyang Anhui 233100,China;Bengbu Special Equipment Supervision and Inspection Center,Bengbu Anhui 233000,China;College of Architecture,Anhui Science and Technology University,Bengbu Anhui 233000,China)

机构地区：[1]安徽科技学院机械工程学院,安徽凤阳233100 [2]蚌埠市特种设备监督检验中心,安徽蚌埠233000 [3]安徽科技学院建筑学院,安徽蚌埠233000

出　　处：《兰州工业学院学报》2024年第1期33-39,共7页Journal of Lanzhou Institute of Technology

基　　金：安徽省教育厅科学研究重点项目(2022AH051630;KJ2021A0862)。

摘　　要：为揭示不同火灾环境下Q345厚板组织和性能的变化规律,通过显微组织定量表征和硬度性能测试方法,分析了不同火灾环境对Q345厚板铁素体含量及硬度分布规律的影响。结果表明:在相同受火温度下,Q345厚板铁素体含量及硬度沿厚向的变化趋势不明显;而不同受火温度下,Q345厚板相同测试点位置处的铁素体含量随温度的升高而下降,其硬度随温度的升高而增大。基于试验结果,分别建立了Q345厚板V_(F)-T和H-l-T预测模型,并揭示了V_(F)-H相互影响关系,该模型可为火灾环境下Q345厚板组织和性能的变化评价提供理论参考。To reveal the variation law of microstructure and properties of Q345 thick plate under different fire environment,the influence of different fire conditions on the ferrite phase content and hardness distribution of Q345 thick plate is analyzed by means of microstructure quantitative characterization and hardness testing.The results show that under the same fire temperature,the variation trend of ferrite phase content and hardness along the thickness direction of Q345 thick plate is not significant.However,under different fire temperatures,the ferrite phase content of Q345 thick plate at the same test point decreased while the hardness increased with the increasing temperature.Based on test results,the V_(F)-T and H-l-T predictive models for ferrite phase content and hardness of Q345 thick plate are established,respectively.The interrelationship between V_(F)and H is revealed,providing a theoretical reference for evaluating the changes in microstructure and properties of Q345 thick plate under fire conditions.

关 键 词：火灾环境 Q345厚板 铁素体含量 硬度 预测模型 

分 类 号：TG115.5[金属学及工艺—物理冶金]