STEEL PRODUCT WITH VARIOUS STRENGTH USING GALVANIZED STEEL SHEET FOR HOT STAMPING AND METHOD OF MANUFACTURING THE SAME

摘要

Disclosed is a galvanized steel sheet for a hot stamping with excellent impact absorbing ability in a collision and a method for manufacturing a steel product using thereof. According to the present invention, the galvanized steel sheet for a hot stamping comprises: to weight% 0.05-0.17% of carbon (C), 0.01-0.55% of silicone (Si), 1.0-2.3% of manganese (Mn), exceeding 0% and less than and equal to 0.04% of phosphorus (P), exceeding 0% and less than and equal to 0.015% of sulfur (S), 0.01-0.38% of chrome (Cr), 0.001-0.25% of molybdenum (Mo), 0.03-0.1% of titanium (Ti), 0.004-0.1% of niobium (Nb), and residual iron (Fe) and unavoidable impurities. Is formed a plating layer, of which a zinc is included in a surface, and 700-1200 MPa of a tensile strength and more than 12.0% of an elongation ratio are shown after a hot stamping. [Reference numerals] (AA) Start;(BB) End;(S210) Welding the first blank and the second blank;(S220) Heating;(S230) Hot stamping