レーザー加工トーチを用いた配管表面肉盛溶接技術の研究

寺田 隆哉; 西村 昭彦; 岡 潔; 森山 拓*; 松田 宏康*

保全学, 13(4), p.87 - 94, 2015/01

http://ci.nii.ac.jp/naid/40020323883

New maintenance technique was proposed using a hand-held laser torch for aging chemical plants and power plants. The hand-held laser torch was specially designed to be able to access limited tubular space in various cases. A composite-type optical fiberscope was composed of a center fiber for beam delivery and surrounded fibers for visible image delivery. Laser irradiation on a work pieces with the best accuracy of filler wire was carried out. And, we found that the optimized wire-feed speed was 2 mm/s in laser cladding. We succeeded to make a line clad on the inner wall of 23 mm tube. This technique was discussed to be applied to the maintenance for cracks or corrosions of tubes in various harsh environments.