Manufacturing method of high manganese steel slab and manufacturing method of high manganese steel slab or steel plate

摘要

Provided is a method for producing a high manganese steel slab capable of suppressing cracking during rolling in the production of a high manganese steel piece or a steel plate. The method for producing a high manganese steel slab according to the present invention is used in a continuous casting machine or in a heating furnace for hot rolling in the next step when continuously casting a high manganese steel molten steel having a specific composition to produce a slab. In the transfer process up to loading, the slab having a surface temperature of 600 ° C. or higher and 1100 ° C. or lower is given a machining strain such that the machining strain amount calculated by the following formula (1) is 3.0% or higher and 10.0% or lower. do. Processing strain amount (%) = ln (cross-sectional area of slab before processing / cross-sectional area of slab after processing) × 100 ... (1)