Effect of Adding ZrO_2 Nano-powder on Microstructure and Mechanical Properties of Cold Rolled Carbon Steel
ZrO2nano-powder,which the size is in 40-50 nm,is added into Q235 steel by different quality fraction(0.1%,0.3%,0.5%,0.7%,0.9%).After rolling and annealing treatment,the grain size and mechanical pro-perties of the steel specimen was tested.The conclusions show that the grain become finer markedly when the ZrO2nanopowder is added.The optimal quality fraction of ZrO2nano-powder is 0.3%.Compared with the steel without addition ZrO2,the mechanical properties of the steel with 0.3% ZrO2nano-powder addition increase obviously.