HIGH-STRENGTH AND HIGH-TOUGHNESS MAGNESIUM ALLOY WITH OPTIMIZED DISTRIBUTION OF GRAIN GROWTH INHIBITORS

摘要

PURPOSE: High-strength and high-toughness magnesium alloy is provided to reprecipitate a regulated amount of small secondary-phase particles from metal matrix during a cooling step and a temperature equalizing step in a furnace.;CONSTITUTION: A method for manufacturing a grain-oriented electrical steel strip comprises a slab heating step comprising a plurality of steps implemented at lower temperatures than one of treatment temperatures before hot rolling, a cold rolling step comprising one or more reduction steps separated by intermediate annealing, where the thickness of slab is reduced by 75% or more in one or more of the reduction steps, and a first continuous recrystallization annealing step for the cold rolled strip implemented at 800-950°C.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Temperature[°C]; (BB) Duration in a furnace[min]