本发明公开了一种低成本特厚耐磨型海洋平台齿条用钢板，该钢板的各化学成分质量百分比如下：C:0.30%~0.40%，Si:015%~0.35%，Mn:0.5%~0.6%，P<0.012%，S:0.002%，Ni:0.5%~0.6%，Cr:0.8%~0.9%，Mo:0.50%~0.60%、TAl(全铝):0.020%~0.045%余量为Fe和不可避免的杂质。本发明采用电炉冶炼、抽真空、模铸、晾温轧制、特厚淬火机两次不同温度调质处理等工艺方法制得,其力学性能具有强度、硬度高，耐磨性好，低温冲击韧性性能良好的特点，由于贵重合金元素含量低，具有低成本的特点。

The invention discloses a low-cost extra-thick wear-resistant steel plate for a marine platform rack. The steel plate comprises the following chemical components, in mass percent, 0.30% to 0.40% of C,0.15% to 0.35% of Si, 0.5% to 0.6% of Mn, <=0.012% of P, <=0.002% of S, 0.5% to 0.6% of Ni, 0.8% to 0.9% of Cr, 0.50% to 0.60% of Mo, 0.020% to 0.045% of TAl (all aluminum), and the balance of Fe and inevitable impurities. The steel plate is prepared by electric furnace smelting, vacuum extraction, die-casting, air-temperature rolling, and two different temperature quenching and tempering treatments of an extra-thick quencher, has mechanical properties of high strength and hardness, good wear resistance, and good low-temperature impact toughness, and is low cost due to the low content of precious alloy elements.