初層すみ肉溶接の変形割れ挙動とその割れ防止施工条件の選定

概要

論文の詳細を見る
Heel cracking, a kind of cold cracking, is successfully reproduced by non-restraint T-type fillet weld cracking test. This crack is likely to be caused with decreasing vertical plate thickness and increasing heat input. This tendency can not be explained by the conventional concept of restraint cracking dealing with relatively thick plate in one dimensional field, but the generation of rotational deformation on the condition of vertical plate thickness smaller than critical thickness, h_<cr>. These results lead to the fact that this type of crack is characterized as deformation cracking in comparison with restraint cracking. The large sized fillet weld cracking tests are also conducted, and their preheat temperature for avoiding cracks is compared with that of non-restraint T-type cracking test. As the results, using the results of non-restraint T-type cracking test, the diagrams are established for avoiding single fillet weld cracking for given thickness, heat input and cracking index of chemical compositions of steel plate, P_N.
社団法人溶接学会の論文
1980-01-05