| 摘要 |
PROBLEM TO BE SOLVED: To provide a galvanized steel wire for an overhead transmission line, which is manufactured by a more inexpensive means, is superior in corrosion resistance and workability, and has high reliability, and to provide a manufacturing method therefor. SOLUTION: This ultra thick galvanized steel wire comprises a hot-dip galvanized layer of which the coating weight is 520 g/m<SP>2</SP>or more, of which the outer layer is composed of a pure zinc layer, and of which the surface roughness is 50μm or less by Rmax (average maximum roughness specified in JIS); and a Fe-Zn alloy layer of which the thickness is 20-30μm. The manufacturing method therefor comprises continuously immersing the steel wire in a hot-dip galvanizing tank, raising it at a predetermined rate, solidifying the hot-dip plated layer, and then ending the galvanizing, or repeating it several times. COPYRIGHT: (C)2003,JPO
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