本发明涉及一种具有优异低温韧性的960 MPa级超高强度钢的制造方法。其钢板的化学成分按重量百分比计包括以下成分C：0.07～0.12％，Si：0.10～0.60％，Mn：1.80～3.00％，P：≤0.01％，S：≤0.01％，Cu：0.30％～1.50％，Ni:0.60～1.80％，Mo：0.10～0.50％，Nb：0.02～0.10％；其余为Fe和不可避免的杂质。本发明提供的制造方法实现同时具有超高强度和低温韧性能的钢板生产，得到成材率高、强度和低温韧性稳定的钢板。本发明钢板具有超高强度(屈服强度≥960 MPa)，断后延伸率≥15％，低温韧性优异(60℃冲击功≥230 J)的特点。

The invention relates to 960 MPa grade ultra-high strength steel with excellent low temperature toughness and a manufacturing method thereof. The chemical composition of a steel plate made of the steel comprises the following components, by weight percentage, 0.07-0.12% of C, 0.10-0.60% of Si, 1.80-3.00% of Mn, no more than 0.01% of P, no more than 0.01% of S, 0.30-1.50% of Cu, 0.60-1.80% of Ni, 0.10-0.50% of Mo, and 0.02-0.10% of Nb and the balance Fe and inevitable impurities. By means of the manufacturing method, the production of the steel plate with ultra-high strength and low temperature toughness at the same time can be achieved, and the steel plate with high yield, stable strength and low temperature toughness is obtained; and the steel plate has the characteristics that the ultra-high strength (the yield strength is greater than or equal to 960 MPa) is achieved, the elongation after fracture is greater than or equal to 15%, and the excellent low temperature toughness (-60 ℃ impact energy is greater than or equal to 230 J) is achieved.