Research And Development Of Cold Rolled Hot-Dip Galvanized Dp590 Steel With Low Cost

Two low-cost cold rolled hot-dip galvanizing DP590 steels with different alloy elements were designed and the effects of alloy elements and galvanizing process parameters on the microstructure and mechanical properties were investigated. The results show that both of the experimental steels exhibit typical dual phase microstructure. Compared to the steel with higher silicon, the ferrite phase of steel with higher chromium is more pure and martensite-austenite (MA) islands are more evenly distributed. Both of the steels satisfy the mechanical properties standard of cold rolled hot-dip galvanizing DP590 steel, while steel with higher chromium has better elongation.