Microstructural Investigations of Electron Beam Welded Joints of Continuous Saw Blades

Abstract The active part of the endless saw blades is made of high-speed steel, HS2-10-1-8, and the holder from X32CrMoV4-1 alloyed steel. Joining of the both parts is realized by electron beam welding which provides narrow seams, small heat affected zones (HAZ), good reproducibility of the results, and uniform microstructure in welded joint zones. The present paper analyzes the structural modifications as well as the chemical composition in the welded joint zones obtained by the electron beam welding of two dissimilar steels. The phenomena which cause the continuous developement of the chemical composition of the weld are examined by energy dispersion X-ray technique (EDX) and scanning electron microscopy.