Microstructural properties of semisolid welded joints for AISI D2 Tool Steel

摘要

The aim of this study is to investigate experimentally the microstructural evolution of the joints using ledeburitic AISI D2udTool Steel parts. The application of a new process of the semisolid joining of two parts of AISI D2 cold-work tool steeludis proposed using a partial remelting method. Samples were heated in an argon atmosphere up to 1300°C and held forud10 minutes. Metallographic analyses along the joint interface showed a smooth transition from one to the other andudneither oxides nor microcracking was observed. The current work successfully confi rmed that avoidance of a dendriticudmicrostructure in the semisolid joined zone and high bonding quality components can be achieved without the need forudforce or complex equipment when compared to conventional welding processes.