Endurance of turning tools subjected to overlay welding

Abstract

In the present work coatings obtained by auto-matic arc welding under the flux using unbinded powder of materials spread on the surface of overlayed surface or inserted into the flux were investigated. Structural steel was overlay welded by P6M5K5, WC-8%Co, alloying elements (Cr, Mo, W, Co), graphite and boron carbide powder, as well as steel P6M5 chips. By the arc overlay welding of unbinded powder, hard, wear resistant and hav-ing satisfactory heat resistance layers were formed. Dura-bility of the lathe tools subjected to overlay welding was investigated. Commercial tests show that the durability of lathe tools subjected to overlay welding depends on weld-ing materials and technology.