Metallographic phase quantitative analysis on wire short weld mark of multi-strand copper
Yi Sun · Fire Science and Technology · 2012
Simulated fire scene,used fire trace evidence comprehensive test system,short weld mark of multi-strand copper was prepared,and designed natural cooling and water cooling condition,the microstructure was observed by metallurgical microscope.And meanwhile,experiments with the same condition were made 10times and compared in order to determine the stability of the metallurgical microstructure.Using IPP,quantitative analysis was made to conclude quantitative indicators.The results show that metallurgical microstructure could be influenced by factors as time of short circuit,temperature and wire cooling method.By comparing experiment results,mathematical modeling was founded,interference factors were excluded,metallographic microstructure of many experiment results has extremely consistent similarities and stability.