필렛 용접부의 개선형상이 강도에 미치는 영향

Abstract

Recently, fillet welding process is widely used in the manufacturing process of T or H frames in steel structure. For the reliability of the welded structure, it is common that the groove preparation should be preceded before welding process for the better welding results.

In the case full penetration welded joints with groove preparation, considerable welding deformation number of passes in welded joints occurred. And it can be a reason for root crack, because of the root gap. For these reasons, groove preparation is preferred to no groove preparation in manufacturing, even though higher manufacturing costs, and lower productivity.

This study intended to estimate the applicability of fillet welded joints without groove preparation(6 ~ 12t) in terms of NDT, mechanical and metallurgical characteristic.