DWTT Method and Apparatus for Optimizing Production Conditions of Plate Using Standardization of DWTT Shear Area Data

摘要

According to the embodiment of the present invention, the data of the drop weight tear test (DWTT) for a plurality of steel materials is rearranged by the soft-brittle transition interval data on the basis of 50% of the shear area (SA) The distinction is made. The variation of the DWTT ductile wave rate during the initial production of the steel is monitored and the DWTT quality stability is evaluated from a small number of tests using dispersion in the ductile-brittle transition zone.