An Investigation of Electron Beam Welding of Sintered Iron

概要

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This report shows some experimental data concerning the electron beam welding of a sintered iron having various kinds of porosities. The purpose of this investigation is to make clear the relation between the welding conditions and the weld structure, and shrinkage of weld zone of the sintered iron. The results obtained are summarized as follows : (1) The pores in a sintered iron zone which the electron beam had penetrated, disappeared and the zone turned into a solid state because of the sintered structurs had been melted by the beam current. And the difference between the structure of weld zone and that of base sintered iron was clearly observed. (2) It was observed that several cracks which cuased a lowering of the weld strength developed at the boundary of the weld zone owing to the high porosity of a sintered iron or passage of a high beam current. (3) The penetrating depth of beam current increased with an increased beam current and an increased accelerating voltage, as well as an increased the porosity of sintered iron. (4) The penetrating width of specimen increased with an increased beam current, but concerning the accelerating voltage, a reverse tendency was observed because of the electron beam diameter being pinched due to an increased accelerating voltage.
社団法人溶接学会の論文
1979-10-01