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发明公开
CN108251744A 一种非调质铁路货车上心盘用钢及其生产方法 无效 - 驳回

一种非调质铁路货车上心盘用钢及其生产方法
摘要：
本发明公开了一种非调质铁路货车上心盘用钢及其生产方法，所述非调质钢化学成分组成及其质量百分含量为：C：0.09‑0.22%、Mn：0.7‑1.00%、Si：0.17‑0.37%、V：0.02‑0.10%、Ti：0.015‑0.200%、Nb：0.02‑0.15%、Ni：0.15‑0.30%、Al：0.005‑0.050%、S≤0.035%、P≤0.035%，余量为Fe及不可避免的杂质；所述生产方法包括转炉冶炼、LF精炼、板坯连铸、铸坯加热、控轧控冷、板材堆冷缓冷、板材抛丸、正火热处理工序。本发明非调质钢具有优良的抗拉强度、低温冲击韧性和抗疲劳强度，生产方法具有生产周期短、节约燃料等优点。
摘要（英）：

The invention discloses non-tempered steel for an upper center pan of a railway wagon and a production method thereof. The non-tempered steel is prepared from the following chemical components in percentage by weight: 0.09-0.22% of C, 0.7-1.00% of Mn, 0.17-0.37% of Si, 0.02-0.10% of V, 0.015-0.200% of Ti, 0.02-0.05% of Nb, 0.15-0.30% of Ni, 0.005-0.050% of Al, less than or equal to 0.35% of S, less than or equal to 0.35% of P and the balance of Fe and inevitable impurities. The production method comprises the following steps: converter smelting; LF refining; slab continuous casting; casting blank heating; controlled rolling and controlled cooling; panel stack cooling and slow cooling; panel shot blasting; and normalizing thermal treatment. The non-tempered steel disclosed by the inventionhas excellent tensile strength, low temperature impact toughness and fatigue resistance, and the production method has the advantages of being short in production period, fuel-saving and the like.

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