Component design and production method of 1500 MPa-grade low-carbon and medium-manganese copper-contained steel

The invention relates to component design and a production method of 1500 MPa-grade low-carbon and medium-manganese copper-contained steel. The 1500 MPa-grade low-carbon and medium-manganese copper-contained steel comprises the following chemical components in percentage by mass: 0.20-0.23% of C, 0.5-0.8% of Si, 3.5-4.0% of Mn, 1.2-2.0% of Al, 0.5-1.0% of Cr, 0.6-1.0% of Cu, 0.2-0.5% of Ni, 0.003-0.012% of N, 0.00051-0.003% of B, and the balance of Fe and inevitable impurities. One part of alloy elements are added based on traditional TRIP steel to largely increase the content of manganese to reach the medium-manganese range; when Al is used for replacing the Si elements, a proper amount of Si elements are retained, so that the Al and Si elements are matched for use; and a certain quantity of precipitation-hardened Cu elements are added to match with a proper amount of Ni elements for use to eliminate the hot brittle phenomenon caused by Cu in hot working. In addition, few Cr elements are added; a proper amou