Experimental and analytical evaluation of preheating temperature during multipass repair welding

Abstract

Experimental measurement and analytical calculation of preheating, i. e. interpass temperature during multi-pass repair welding has been presented. Analytical calculation is based on heat transfer analysis, whereas measurements have been performed by thermovision camera. Repair welding was performed on crane wheels in the Steelworks Smederevo. Comparison of results indicated that analytical calculation is good enough as the first approximation, but it needs further elaboration, e. g. taking into account the radiation component of heat dissipation and/or temperature dependence of material thermomechanical properties.

Heat and power plant chimneys thermal inspection with an infrared camera

“…Other experimental measurements were conducted during multi-pass repair welding on crane wheels. They have been performed by thermovision camera and proved that the radiation component of heat dissipation and temperature dependence of material thermomechanical properties are essential factors [10] and the radiation effects should be included in order to improve the calculations.…”

Experimental and numerical study of temperature field during hard facing of different carbon steels

“…Hard facing represents process of deposition of molten material to the other material called substrate. Mostly used hard facing methods are conventional welding methods such as MMA, GMA or TIG [1][2][3][4], although today are in use and some modern methods [5]. Hard facing is mostly used for reparation of damaged parts when due to damage they cannot be used properly to retrieve its working function [4][5][6][7].…”