LOW CARBON-HIGH MANGANESE STEEL AND MANUFACTURING PROCESS THEREOF
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Feb 25, 2014
filing date -
Mar 14, 2013
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Abstract
A low carbon-high manganese steel sheet and process for manufacturing the sheet is provided. The process includes soaking a steel slab with a desired chemical composition within a temperature range of 1200-1350° C., followed by hot rolling of the slab into hot strip. The cold rolled sheet is continuously annealed within a temperature range of 730-850° C. and temper rolled between 1.0-2.0%. The temper rolled sheet has a yield strength greater than 280 megapascals (MPa), a tensile strength greater than 400 MPa, an elongation to fracture greater than 30%, an n-value greater than 0.15, and a bakehard index between 15-35 MPa.
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