| 着床后引燃对电弧迸溅熔珠组织特征的影响* |
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| 引用本文： | 张志伟,雷心怡,王一名,周广英,李阳,王伟峰.着床后引燃对电弧迸溅熔珠组织特征的影响*[J].中国安全生产科学技术,2022,18(8):202-209. |
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| 作者姓名： | 张志伟 雷心怡 王一名 周广英 李阳 王伟峰 |
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| 作者单位： | (1.中国人民警察大学 研究生院，河北 廊坊 065000；2.陕西省杨凌示范区消防救援支队，陕西 杨凌 712100；3.黑龙江省大庆市消防救援支队，黑龙江 大庆 163000；4.中国人民警察大学 物证鉴定中心，河北 廊坊 065000；5.西安科技大学 安全科学与工程学院，陕西 西安 710054） |
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| 基金项目： | * 基金项目: 国家自然科学基金项目（52074213）；河北省自然科学基金青年科学基金项目（E2021507002）；中国人民警察大学重点实验室培育类课题（2019SYCXPD001） |
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| 摘 要： | 为探究迸溅熔珠着床后的热交换过程对其组织特征的影响，建立基于着床后高温迸溅熔珠的动态测温方法，从而揭示迸溅熔珠着床后引燃与否对其组织特征形成的影响规律。研究结果表明:引燃可燃物的熔珠受火焰热反馈和铜氧化放热的共同作用，着床后其温度出现反复波动，延长迸溅熔珠的冷却凝固时间，组织呈等轴状；无法引燃可燃物的熔珠在可测范围内，短暂升温后降温速率持续上升，组织更易呈现树枝状或胞状。研究结果可为准确认定电气故障电弧迸溅熔珠引发火灾提供技术支持。
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| 关 键 词： | 电气火灾 故障电弧 迸溅熔珠 引燃过程 金相组织 |
Influence of ignition after landing on microstructure characteristics of arc splashed melted bead |
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| ZHANG Zhiwei,LEI Xinyi,WANG Yiming,ZHOU Guangying,LI Yang,WANG Weifeng.Influence of ignition after landing on microstructure characteristics of arc splashed melted bead[J].Journal of Safety Science and Technology,2022,18(8):202-209. |
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| Authors: | ZHANG Zhiwei LEI Xinyi WANG Yiming ZHOU Guangying LI Yang WANG Weifeng |
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| Institution: | (1.Graduate Academy,China People’s Police University,Langfang Hebei 065000,China;2.Yangling Demonstration Area Fire and Rescue Brigade,Yangling Shaanxi 712100,China;3.Daqing Fire and Rescue Brigade,Daqing Heilongjiang 163000,China;4.Institute of Forensic Science,China People’s Police University,Langfang Hebei 065000,China;5.School of Safety Science and Engineering,Xi’an University of Science and Technology (XUST),Xi’an Shaanxi 710054,China) |
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| Abstract: | In order to explore the influence of heat exchange process on the microstructure characteristics of the splashed melted bead after landing,a dynamic temperature measurement method for the high-temperature splashed melted bead after landing was established,and the influence of ignition on the formation of microstructure characteristics of splashed melted bead after landing was revealed.The results showed that under the combined effect of flame heat feedback and copper oxidation heat release,the temperature of melted bead igniting the combustibles fluctuated repeatedly after landing,which prolonged the cooling and solidification time of the melted bead,with the equiaxed microstructure.Within the measurable range,the cooling rate of the melted bead without igniting the combustibles continued to increase after a short period of temperature rise,and its microstructure was more likely to appear the dendritic or cellular structure.The results can provide technical support for accurately identifying the fire caused by the splashed melted bead of electrical arc fault. |
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| Keywords: | electrical fire arc fault splashed melted bead igniting process metallographic structure |
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