Effect of Active and Nonactive Fluxes on the Mechanical Properties and Microstructure in Submerged-Arc Welds of A-36 Steel Plates

Abstract

A study of the effect of active and nonactive fluxes on the mechanical properties and microstructure of submerged-arc welds for steel plates was carried out for the Submerged-Arc Welding (SAW) of A-36 Steel Plates. The nonactive flux promoted the formation of pearlite and ferrite in the weld having the highest toughness and ductility. In contrast, the active fluxes with Cr and Mo promoted the formation of acicular ferrite and fine carbides in the welds showing the highest tensile strength and hardness.

Keywords:

• A-36 steel
• Active flux
• Ferrite
• Hardness
• Microstructure
• Nonactive flux
• Pearlite
• Submerged-arc welding process
• Tensile properties
• Toughness

ACKNOWLEDGMENTS

The authors wish to thank the financial support received from CEGEPI-IPN and FESC-UNAM.