Micro-Hardness and Mechanical Properties of EN24 Alloy Steel Weldments Using Pulsed and Non-Pulsed Current Gas Tungsten Arc Welding

摘要

In this experimental study, the weld micro hardness and mechanical properties of weldments have been carried out on EN24 alloy steel using GTAW with pulsed and non-pulsed current at different frequencies 2Hz, 4Hz and 6 Hz. Hardness is the ability of a metal to resist penetration . In order to improve the mechanical integrity of the weldments it would be desirable to study the micro hardness of weldments. The present study was performed in order to show difference of micro-hardness and mechanical properties of the weldments made with pulsed and non-pulsed current at different frequencies of GTAW. The hardness measurement can provide information about the metallurgical changes caused by the welding.