Method and the device which adjust the intended character combination in case of the multiphase steel

摘要

Topic The multiphase steel which is produced making use of standard analysis and standard methodological operation, offer of method and the device which can transform in the steel of the type which possesses the character of most optional combinations.Solutions For example constitution of the multiphase steel at least includes 30% ferrite and the maximum of 50% martensite, the usual hot rolling line which uses standard analysis and standard methodological operation, the thin throb casting and rolling plant or fits is produced on the narrow strip production line and intermediate strip production line or wire rod production line, it is quarter-phase steel and the TRIP steel, hot rolling (10) or following to the finished stage after the heat in the method of adjusting the character of the combination which when it is the multiphase steel which is rolled is intended, for example following to the finish of the structural element, modification possible annealing temperature and modification possible annealing periodIt features that combination of desire of strength and yield ratio of the multiphase steel is adjusted after using, it was connected or center the annealing processing which is connected (30 and 35) with, the above-mentioned method.