AUSTENITIC STEEL HAVING EXCELLENT STRAIN HARDENING RATE AS WELL AS ABRASION RESISTANCE PROPERTIES AND METHOD FOR MANUFACTURING THE SAME

摘要

The present invention relates to an austenitic steel material with excellent strain hardening rate and excellent wear resistance, and a manufacturing method thereof. An embodiment of the present invention provides the austenitic steel material with excellent strain hardening rate comprising: 14-20 wt% of Mn; 0.4-1.2 wt% of C; 0.01-0.5 wt% of N; 0.5-10 wt% of Cr; and the remainder consisting of Fe and inevitable impurities having fine structures having 3% or less of carbide with respect to a total area and the remainder consisting of an austenitic structure, and to a manufacturing method thereof. The austenitic steel material has a yield ratio (yield strength/tensile strength) of 0.5 or less, and a uniform elongation ratio of 30% or higher. The present invention provides a high-strength austenitic steel material applicable to a technical field for the oil and gas industries where wear resistance is required such as mining, transporting, and storing fields due to excellent strain hardening rate.