MANUFACTURING METHOD OF HIGH-STRENGTH ALLOY GALVANIZED STEEL SHEET AND THE HIGH-STRENGTH ALLOY GALVANIZED STEEL SHEET MANUFACTURED THEREBY, CAPABLE OF PERFORMING FLASH PICKLING PROCESS

摘要

PURPOSE: A manufacturing method of a high-strength alloy galvanized steel sheet and the high-strength alloy galvanized steel sheet manufactured thereby are provided to produce the high-strength alloy galvanized steel sheet having good mechanical property and powdering resistance.;CONSTITUTION: A manufacturing method of a high-strength alloy galvanized steel sheet includes a step for manufacturing a melting zinc plated steel sheet including plating component such as Si and Mn etc. A pickling solution includes HCL of 10~20%. The temperature of the pickling solution is 25~90°C in a pre-processing flash pickling process. The hydrogen concentration of an annealing process is 5~10%. A dew point temperature of the annealing process is -30 ~ -50°C.;COPYRIGHT KIPO 2010