The effect of tungsten carbide particles content in a weld deposit on its abrasion resistance

Abstract

Original scientific paper This paper describes the study of a weld deposit which contains tungsten carbide particles. For testing the process of gas metal arc welding in a protective atmosphere of a mixed gas with two types of cored wires were used. The selected cored electrode of a "F-Durit G" type already contains the tungsten carbide particles. The second used option was a cored electrode of a "Megafil A 864M" type with an increased boron content. For the second variant tungsten carbide particles with a 1-2 mm size were added to the weld pool, and a composite material layer was thus created. For the mentioned test two different levels of welding parameters were selected and the final weld deposit properties, particularly their abrasion resistance, were examined. Keywords: abrasion; carbide; electric arc; tungsten; vibratory feeder; welding matrix Učinak sadržaja čestica karbida volframa u naslagi zavara na njegovu otpornost na abrazijuIzvorni znanstveni članak U radu se daje analiza naslage zavara koja sadrži čestice karbida volframa. U ispitivanju je primijenjen postupak elektrolučnog zavarivanja u zaštićenoj atmosferi miješanog plina s dva tipa žice s jezgrom. Izabrana elektroda s jezgrom tipa "F-Durit G" već sadrži čestice karbida volframa. Druga primijenjena opcija bila je elektroda s jezgrom tipa "Megafil A 864M" s povećanim sadržajem borona. U drugoj su varijanti čestice karbida volframa veličine 1-2 mm dodane u zavar i tako je stvoren sloj od kompozitnog materijala. Za spomenuti pokus izabrana su dva različita nivoa parametara zavarivanja, a mi smo ispitivali svojstva završne naslage zavara, a naročito otpor na abraziju.