Ultra-wide quenched and tempered wear-resistant steel plate and manufacturing method thereof

The steel plate comprises the following chemical components: 0.13%-0.25% of C, 0.30%-0.60% of Si, 0.5%-1.5% of Mn, less than or equal to 0.020% of P, less than or equal to 0.0020% of S, 0.30%-0.60% of Cr, less than or equal to 0.30% of Mo, less than or equal to 0.30% of Ni, 0.008%-0.025% of Ti, less than or equal to 0.025% of Nb, less than or equal to 0.030% of V, 0.0015%-0.0025% of B, 0.025%-0.07% of Alt, less than or equal to 0.0050% of N, less than or equal to 0.0003% of H, less than or equal to 0.65% of Ceq and the balance of Fe and inevitable impurities. The manufacturing method of the steel plate is stable in process and easy to implement, the performance uniformity of the final steel plate in the width direction is good, good low-temperature impact toughness and welding performance are achieved, and preheating-free welding can be achieved. 本发明涉及一种超宽调质耐磨钢板及其制造方法，钢板化学成分如下：C：0.13%～0.25%，Si：0.30%～0.60%，Mn：0.5%～1.5%，P≤0.020%，S≤0.0020%，Cr：0.30%～0.60%，Mo≤0.30%，Ni：≤0.30%，Ti：0.008%～0.025%，Nb≤0.025，V≤0.030%，B：0.