Control of Angular Distortion Due To Welding Conditions in T-fillet Welded Joints

Shrinkage Distortion in Welded Joints (Report 2)

Abstract

Characteristics of angular distortion in T-fillet welded joints are similar to those of bead-on plate as shown in Fig. 1. Relation between angular change in T-fillet joint and welding conditions is shown in Fig. 2. Angular change by the same electrode becomes maximum when the thickness of plate (h) about 8-10mm. (see Fig. 4).
Angular change for the multi-pass fillet weld is approximately proportional to numbers of layer or weight of deposited metal per unit weld length (w) (see Fig. 3). Then simple formula for angular change of multi-pass fillet weld is given by eq. (5), where C/w₀ is constant depending on the electrode used. Experimental results are shown in Fig. 6.
Effect of electrode size in manual weld and comparison of manual and submerged arc weld is shown in Fig. 8. From this we know that when h≤16mm, the larger size of electrode produces the smaller angular change, and when h<8mm, the angular change due to unionmelt weld is larger than manual weld