汽车车身受热痕迹规律研究

Study on the rule of heating trace on bodywork of a car

选取汽车车身和未涂装底材进行模拟实验,观察其在不同受热时间、受热温度和冷却条件下的受热痕迹特征,通过对比分析,研究汽车车漆对车身受热痕迹的影响。实验表明,车漆对底材具有一定的保护作用,在自然冷却条件下的保护效果好于在水冷条件下的保护效果;自然冷却条件下,车身不会出现锈蚀现象;受热温度对车漆的影响远大于受热时间对车漆的影响。同时,将调查结论紧密结合实际工作,提出车身受热痕迹现场判别方法,对汽车火灾调查具有一定参考价值。

Bodywork of a car and uncoated base material are se-lected for simulation experiment,and the characteristics of heat-ing trace under different heating time,temperature and cooling conditions are observed.Through comparative analysis,the in-fluence of automobile paint on heating trace of bodywork of a car is studied.Experiments show that car paint has a certain pro-tective effect on the base material,and the protective effect un-der natural cooling is better than that under water cooling;Un-der natural cooling conditions,the car body will not rust;The in-fluence of heating temperature on car paint is far greater than that of heating time.At the same time,combining the investiga-tion conclusion closely with practical work,this paper puts for-ward the on-site discrimination method of heat marks of body-work of a car,which has certain reference value for automobile fire investigation.