Comparison of Microparticles and Nanoparticles Effects on the Bonding of Roll Bonded IF Steel

In the present work, the effect of silicon carbide (SiC) particle size on the characteristics of cold roll bonded interstitial free (IF) steel strips, such as bond strength and peeled surface were carried out and compared to those of IF steel strip without particles. The bond strength was evaluated by the peeling test and scanning electron microscopy. It was found that with increasing thickness reduction, the bond strength of IF steel strips improved. The results also indicated that the presence of SiC particles (both micro and nano) decreased the bond strength of IF steel strips. Also, with increasing the particle size, the bond strength improved. It was found that for sample with microparticles compared to sample with nanoparticles, beyond the 80 % thickness reduction, a sudden increase in the average peel strength was observed. Finally, the results indicated that in the presence of nanoparticles between strips there were two types of unbonded area and the bond strength of these two areas was quite similar to each other.