溶融特性におよぼす溶接因子の影響 : 大出力電子ビーム溶接の実用化に関する基礎的研究(第 1 報)

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One side welding joints of thick material are made by high power electron beam welding which is expected high quality, high welding speed, low heat input per unit joint area and small welding deformation. Big machinery goods, pressure vessels and penstocks are expected to be welded by high power electron beam welding. This high power electron beam gun has beam characteristics of relatively wide beam diameter, low power density and long beam active zone in comparison with low power high voltage type electron beam gun. This report discusses the fundamental characteristics of high power electron beam welding and the results obtained in this study are as follows; 1) Energy density of high power electron beam gun was up to (10)^5×(10)^6W/(cm)^2 required to the characteristics of deep penetration, but beam diameter was increasing in accordance with increment of beam current and average beam energy density was almost constant level (about 2×(10)^6W/(cm)^2). 2) Penetration depth of horizontal position was deeper than flat position but it was in proportion to the square root of heat input per unit length. 3) Melting zone of welding cross section was in proportion to the heat input per unit length. 4) Influence of vacuum condition on penetration depth was large for high power electron beam gun of low average beam energy density in comparison with high average beam energy density electron beam gun. 5) The melting efficiency of high power electron beam welding was about 32%.
社団法人溶接学会の論文
1981-11-05

溶融特性におよぼす溶接因子の影響 : 大出力電子ビーム溶接の実用化に関する基礎的研究(第 1 報)

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