電子ビームによる母材の溶融過程とスパイクの形成機構 : 電子ビーム溶接現象に関する研究(第3報)

概要

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Melting process and spiking phenomenon have been investigated in electron beam welding. X-rays generated as a consequence of beam-metal interaction were measured at some specific sites of 3 mm in length along penetration using Xe-proportional counter simultaneously with taking highspeed photography of the molten metal flow to clarify a melting process. The results obtained were as follows.(1) Spiking phenomenon was most likely to occur when the electron beam was focussed on the root portion of penetration.(2) Melting process and spiking phenomenon were dominated by the periodical flow of the molten metal.(3) Soon after the periodical ejection of the molten metal, the beam cavity was clear of the molten metal and the electron beam was free to drill the bottom causing the spike.(4) it is effective in monitoring spiking phenomenon to detect electrons emitted from interacting point using a probe biased 6V with respect to the specimen.
社団法人溶接学会の論文
1990-08-05