Fundamental Study of High Power Electron Beam Welding. I.--Effects of Welding Parameters on Penetration Depth

• Published in: Yōsetsu Gakkai-shi Vol. 50; no. 11; pp. 1095 - 1101
• Main Authors: Masumoto, I, Kutsuna, M, Yasuda, K
• Format: Journal Article
• Language: Japanese
• Published: 01.11.1981
• ISSN: 0021-4787

From a study of the fundamental characteristics of high power electron beam welding for one-sided welding of HY90 steel it was concluded that (1) an energy density up to 10 exp 5 x 10 exp 6 W /cm exp 2 is required for deep penetration, but the beam diameter increases in accordance with the increment of beam current while the average beam energy density was almost constant (about 2 x 10 exp 6 W/cm exp 2 ); (2) the penetration depth in the horizontal position was greater than in the flat position but it was in proportion to the square root of heat input per unit length; (3) the melting zone of the welding cross section was in proportion to the heat input per unit length; (4) the influence of the vacuum condition on the penetration depth was large for a high power electron beam gun of low average beam energy density in comparison with a high average beam energy density electron beam gun; and (5) the melting efficiency of high power electron beam welding was about 32%. 14 ref.--BA