Mitsubishi Heavy Industries Limited

Takashi Hanioka

Masahiro Kimura

Ryuichi Narita

Tadahiro Kimura

Hirokazu Kadowaki

Masao Shiota

Taisuke Ito

A welding method for making cladding or buttering on an inner surface of a base material, an inner surface of an opening portion formed in the base material, and the cut surface formed in such a manner that the cut surface is continuous from the inner surface of the base material to the inner surface of the opening portion, wherein the welding method includes a step of forming a protruding portion on the base material in advance, the protruding portion including a temporary welding surface extending toward the center of the opening portion in such a manner that the temporary welding surface is uniformly continuous to the inner surface of the base material and including the cut surface buried therein.

Welding method and steam generator channel head

An electron beam welding method capable of restoring toughness even when high heat input welding is performed. The electron beam welding method comprises: forming a first weld bead () so as to include a groove () provided at the butt portions of two base materials (), and forming a second weld bead () and a third weld bead () having a narrower width than the first weld bead (), at predetermined positions displaced from the groove () and centered symmetrically about the butt portions so as to include a portion of the first weld bead (), using a lower heat input than that used during formation of the first weld bead ().

Electron beam welding method

Growing community of inventors

Tokyo, Japan

Takashi Hanioka