Study of Ferro boron Content by Paste Technique on Microstructure in Hard faced Mild Steel

The application of hardfacing materials as wear resistant coating on components exposed to wear condition not only safeguards environment but also enhances the service life of engineering equipment and gives a boost to economy. Surface properties and quality of the hardfaced component depends upon the nature of hardfacing alloys selected and the welding process used for hardfacing. Ferro boron is an important alloy used in manufacturing metallic glass and magnetic materials, and preparing several steel alloys. Ferro boron plays pivotal role in increasing mechanical properties of steel. Due to easier availability and operational versatility shielded metal arc welding is the most commonly used process for hardfacing. In this study, cheaper and easily available low carbon steel was selected as a substrate material. Three different content of Ferroboron has been used and sodium silicate has been applied as a binder deposited on mild steel and making use of paste coating process. Mild steel plate 100×75×12 mm3 were used for deposition of hardfacing layers with Ferroboron by paste technique and under shielded metal arc welding for analysis of microstructure and optimizing process parameters namely, Ferroboron content (mg/mm2) Welding current (A) and Average welding speed (mm/min).