钛制设备过火后性能分析及安全性预测  

Analysis of post-fire properties and safety prediction of titanium equipment

作　　者：宋晓枫 支有冉[2] 王静虹 王志荣 SONG Xiaofeng;ZHI Youran;WANG Jinghong;WANG Zhirong(School of Safety Science and Engineering,Nanjing Tech University,Nanjing Jiangsu 211800,China;School of Mechanical Engineering,Nanjing Institute of Technology,Nanjing Jiangsu 211167,China)

机构地区：[1]南京工业大学安全科学与工程学院,江苏南京211800 [2]南京工程学院机械工程学院,江苏南京211167

出　　处：《中国安全科学学报》2020年第12期93-99,共7页China Safety Science Journal

基　　金：国家自然科学基金资助(51606092);中国科学技术大学火灾科学国家重点实验室开放课题(HZ2016-KF02);“安全科学与工程”江苏高校优势学科建设工程项目。

摘　　要：为预测钛制设备过火后可能出现的结构性破裂,通过恒温加热试验模拟过火环境,研究高温过火后工业纯钛TA2经不同冷却方式后的力学性能和金相组织。结果表明:加热温度低于TA2相变温度时,随着加热温度升高、加热时间延长,试样力学性能下降;加热温度超过TA2相变温度时,试样力学性能趋于稳定;但当加热时间超过60 min时,由于高温导致塑性降低,试样拉伸时提前断裂。此外,水冷处理较空冷使TA2金相组织更加规律化。钛制设备发生火灾时,应短时间内遏制火灾事故并让设备尽快降温,可降低设备发生破裂导致二次事故的概率。In order to predict possible structural cracking of titanium equipment after fire,constant temperature heating experiments were conducted to simulate post-fire environment,and mechanical properties and metallographic structure of TA2 under different cooling methods after high temperature treatment were studied.The results show that when heating temperature is lower than TA2 phase transition temperature,mechanical properties of samples will decline as heating temperature increases and time prolongs.When it exceeds that of TA2 phase transition,they tend to be stable.But when heating time exceeds 60 min,plasticity decreases due to high temperature,and sample breaks early when it is stretched.In addition,water-cooled treatment can make metallurgical structure of TA2 more regular than air-cooled one.So when a fire occurs around the titanium equipment,fire accident should be suppressed within a short time and equipment should be cooled as soon as possible to reduce probability of secondary accidents caused by equipment rupture.

关 键 词：工业纯钛TA2 过火 力学性能 安全性预测 金相组织 

分 类 号：X913.4[环境科学与工程—安全科学]