主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (6): 941-944.

• • 上一篇    下一篇

火场条件下热镀锌彩钢板受热痕迹特征研究

邓兆鋆1，金静2，赵禹忱1   

  1. 1. 中国人民警察大学研究生学院，河北廊坊065000；2. 中国人民警察大学侦查学院，河北廊坊065000
  • 出版日期:2021-06-15 发布日期:2021-06-15
  • 通讯作者: 金静(1986-)，女，中国人民警察大学侦查学院副教授。
  • 作者简介:邓兆鋆(1996-)，男，黑龙江伊春人，中国人民警察大学在读研究生，主要从事火灾调查方面的研究，河北省廊坊市安次区西昌路220 号，065000。
  • 基金资助:
    河北省重点研发计划自筹项目（18215416）

Study on the characteristics of heat trace of hot dip galvanized color coated plate in fire

DENG Zhao-yun1, JIN Jing 2, ZHAO Yu-chen1   

  1. 1. Graduate School, China People's Police University, Hebei Langfang 065000, China; 2. School of Criminal Investigation, China People's Police University , Hebei Langfang 065000, China
  • Online:2021-06-15 Published:2021-06-15

摘要： 为了详细研究热镀锌彩钢板受热痕迹特征变化及痕迹形成原因，选择有涂层和无涂层两种热镀锌彩钢板为研究对象，讨论了彩钢板在不同温度下受热30 min 时的痕迹变化特征。结果表明热镀锌彩钢板在高温下的变化主要包括表面涂层的热损、镀锌层及钢板本体的热蚀几方面，其宏观痕迹在400、500、800、900 ℃四个温度点会发生明显变化，宏观上800 ℃以下时主要表现为涂层形态和颜色的变化：涂层无变化—漆层变黑—变为浅黄并出现粉末—漆层出现裂痕—漆层脱落，900 ℃后样品表面为黑色金属氧化层；微观上800 ℃以下时能观察到镀锌层，在800 ℃开始出现须状晶包裹的球状形貌，在900 ℃后出现块状与针状组织，能谱分析发现高温时镀锌层逐渐消失且铁所占比重上升。研究结果旨在为彩钢板建筑的现场痕迹识别提供参考。

关键词: 消防, 热镀锌彩钢板, 受热痕迹特征, 微观形貌

Abstract: In order to understand the trace characteristics and formation mechanism of the color coated plate after heating in detail, it can provide reliable trace evidence for the fire control personnel to accurately identify the cause and point of fire in the fire scene. In this paper, the characteristics of the heat trace of the color coated plate are described and studied in detail by changing the temperature and holding time. The macroscopic trace of hot-dip galvanized color coated steel plate is mainly reflected in the change process of coating shape and color. The main process is that the coating does not change, the paint layer changes to light yellow, the powder paint layer cracks, the paint layer falls off, and the sample is completely black. It can help the fire investigators to judge the heat trace of the color steel plate more accurately by the change of the sample surface.

Key words: fire protection, hot- dip galvanized color coated plate, characteristics of heat trace, micro-morphology