超高エネルギー密度電子ビームの発生と深溶込み溶接への適用

500kV電子ビーム熱源特性(第一報)

抄録

An urtra-high voltage electron beam heat source with an electron gun employing 11-stage electromagnetic accelerating units was developed. The characteristics of the electron beam were studied and a strongly focused electron beam with an ultra-high average beam power density of 160-170 kW/mm² using a beam power of 140-180 kW was successfully generated. Applicability of 500 kV ultra-high voltage electron beam to welding was investigated and it was found that this beam enabled a penetration depth of max 240 mm in flat position welding with a beam power of 180 kW and a welding speed of 6.7 mm/s, allowing a narrow weld bead to be produced with high efficiency.