| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot-dip aluminum-plated steel sheet which has excellent spot weldability to an aluminum material, and has a strength as high as a 490 N grade or higher. SOLUTION: The hot-dip aluminum-plated steel sheet uses a steel material comprising 0.05-0.18% C, 1.50% or less Si, 0.8-2.5% Mn, 0.05% or less P, 0.02% or less S, 0.001-0.02% Mg, 0.015% or less sol. Al and 0.0060-0.0150% N as a base material: and has an AlN-enriched layer formed in an interface between the base material and a plated layer. The base material may include one or more elements selected from the group consisting of 0.02-0.1% Ti and/or Nb, 0.3% or less Mo and 0.0030% or less B. COPYRIGHT: (C)2007,JPO&INPIT
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