Application of Trace Property in Fire Cause Identification

In the investigation of fire causes, there are many kinds of weld marks extracted from the fire site, such as the first and second short circuit weld marks. The relationship between the melting property and the cause of fire can be identified according to the different microstructure characteristics of the weld marks formed on the copper and aluminium wires. Therefore, in the determination of the cause of fire, the nature of the weld mark will directly affect the result of the determination, and sometimes a completely different conclusion will be drawn. However, sometimes in the same fire scene can be extracted from more than one weld mark, and the nature of the weld mark is not the same, which will bring certain difficulties to the fire cause identification work, so the organic combination of all kinds of weld mark, reasonable use, in order to better complete the fire scene cause identification work.