Effect of heat input and filler metals on weld strength of gas tungsten arc welding of AISI 316 weldments  

作　　者：Essam Ahmed Ramy Ahmed A EL-Nikhaily A R S Essa 

机构地区：[1]Metallurgical and Materials Engineering Department,Faculty of Petroleum and Mining Engineering,Suez University,43721 Egypt [2]Mechanical Department,Faculty of Industrial Education,Suez University,43721 Egypt [3]Mechanical Engineering Department,Egyptian Academy for Engineering&Advanced Technology,Affiliated to Ministry of Military Production,Cairo 3056,Egypt

出　　处：《China Welding》2020年第1期8-16,共9页中国焊接（英文版）

摘　　要：The present work investigates the effect of filler metals and heat input on weld bead geometry and mechanical properties of alloy316 welded by using GTAW.ER309 L,ER316 L and ERNi Cr Mo-3 filler metals,are applied to study their effect on the weldment.Weld defects are examined using radiographic testing.The mechanical properties of welds are evaluated through uniaxial testing,hardness measuring,and bending test.The mechanical properties and cooling rate decrease with increasing heat input.Tensile strength,yield stress and percentage elongation of weldments using three fillers are determined.Best results are obtained using ERNi Cr Mo-3.Besides,weld nugget area,cooling time and solidification time increases with increasing heat input.Finally,applying bending test on weld samples,cracks,tearing and surface defects are not observed.

关 键 词：TIG welding filler metals nugget area stainless steel cooling rate 

分 类 号：TG444.72[金属学及工艺—焊接]