Hot-rolled or cold-rolled steel plate method for manufacturing same and use thereof in the automotive industry

본 발명은 이의 조성이 중량 백분율로 다음과 같은 것을 특징으로 하는, 열간 압연 또는 냉간 압연 스틸 플레이트에 관한 것이다: 0.6% ≤ C ≤ 0.9%; 17% ≤ Mn ≤ 22%; 0.2% ≤ Al ≤ 0.9%; 0.2% ≤ Si ≤ 1.1% 여기서 0.85% ≤ Al + Si ≤ 1.9%; 1.2% ≤ Cu ≤1.9%; S ≤ 0.030%; P ≤ 0.080%; N ≤ 0.1%; 선택적으로: Nb ≤ 0.25%, 바람직하게 0.070 내지 0.25%; V ≤ 0.5%, 바람직하게 0.050 내지 0.5%; Ti ≤ 0.5%, 바람직하게 0.040 내지 0.5%; Ni ≤ 2%; 극미량 ≤ Cr ≤ 2%, 바람직하게 ≤ 1%; B ≤ 0.010%, 바람직하게 0.0005% 내지 0.010%; 잔량의 철 및 생산으로부터 결과된 불순물. 본 발명은 또한 이 플레이트를 제조하기 위한 방법, 및 자동차 산업에서의 이 플레이트의 용도에 관한 것이다. Hot-rolled or cold-rolled steel plate, method for manufacturing same and use thereof in the automotive industry A hot-rolled or cold-rolled steel plate, characterized in that its composition is in weight percentages: 0.6%@C@0.9%; 17%@Mn@22%; 0.2%@Al@0.9%; 0.2%@Si@1.1% with 0.85%@Al+Si@1.9%; 1.2%@Cu@1.9%; S@0.030%; P@0.080%; N@0.1%; optionally: Nb@0.25% and preferably comprised between 0.070 and 0.25%; V@0.5% and preferably comprised between 0.050 and 0.5%; Ti@0.5%, and preferably comprised between 0.040 and 0.5%; Ni@2%; trace amounts Cr@2%, preferably@1%; B@0.010%, and preferably, comprised between 0.0005% and 0.010%; the remainder being iron and impurities resulting from the production. A method for manufacturing this plate, the use of this plate in the automotive industry.