| 摘要 |
The present invention relates to high strength austenite-based steel with remarkable toughness of a welding heat-affected zone and a method of manufacturing the same. An embodiment of the present invention provides a high strength austenite-based steel with remarkable toughness of a welding heat-affected zone, comprising 1.0 to 1.5 wt% of C, 15 to 22 wt% of Mn, 5 wt% or less of Cr (except 0), 0.1 to 1 wt% of Mo, and 0.001 to 0.02 wt% of B, and the remainder consisting of Fe and inevitable impurities, wherein the microstructure of a welding heat-affected zone comprises 90% or more of austenite by volume fractions, and a method of manufacturing the same. Therefore, since the alloy components and composition range are effectively controlled, the stability of austenite grain is improved to control the precipitation of carbon nitrides, thereby suppressing the formation of the carbon nitrides of a network shape. Also, the austenite-based steel can be used for a long time under corrosive environments by improving adding Cr to improve the corrosion resistance. |
