Manganese steel strip for straight saw blade and preparation method of manganese steel strip

The invention discloses a manganese steel strip for a straight saw blade. The manganese steel strip comprises the following chemical components in percentage by weight: 0.64%-0.72% of C, 0.15%-0.35% of Si, 1.00%-1.30% of Mn, less than or equal to 0.008% of P, less than or equal to 0.003% of S, 0.15%-0.45% of Cr, 0.010%-0.050% of Al, 0.10%-0.50% of Nb and the balance of inevitable impurity elements of Fe. The method has the advantages that the hardness of the quenched and tempered saw blade meets the 48-55 HRC requirement by improving the carbon, manganese and chromium alloy, the purity and the hardness meet the standard requirement of the saw blade by adopting a clean steel process for smelting and a controlled rolling and controlled cooling process for rolling, and the service life of the saw blade is prolonged. 本发明公开了一种直锯条用锰钢钢带，其化学成分按重量百分比计算为：C：0.64%~0.72%，Si：0.15%~0.35%，Mn：1.00%~1.30%，P≤0.008%，S≤0.003%，Cr：0.15%~0.45%，Al：0.010%~0.050%,Nb：0.10%~0.50%，余量为Fe不可避免的杂质元素。本发明的优点是提高碳、锰和铬合金使得锯条淬回火后硬度满足48~55HRC要求，采用洁净