| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high-strength hot-dip galvanized steel sheet with excellent molding processability, and a method for producing the same. <P>SOLUTION: The high-strength hot-dip galvanized steel with excellent molding processability includes, in terms of mass%, C: 0.05-0.12%, Si: 0.1-0.7%, Mn: 1.4-2.2%, P: 0.05% or less, S: 0.01% or less, Al: 0.01-0.1%, B: 0.0005-0.0050%, N: 0.0060% or less, with the balance being Fe and unavoidable impurities, and includes a hot-dip galvanized layer formed on a steel sheet having a precipitation number density of composite precipitate in which BN is precipitated with MnS of a size of 100 nm or less as a core in hot-rolled steel before annealing of 1,500 pieces/cm<SP POS="POST">2</SP>or less. <P>COPYRIGHT: (C)2012,JPO&INPIT |
