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发明授权
CN108823485B 一种QT400-18AR球墨铸铁、轧辊和球墨铸铁的制备方法 有权

一种QT400-18AR球墨铸铁、轧辊和球墨铸铁的制备方法
摘要：
本发明属于球墨铸铁领域，其公开了一种QT400‑18AR球墨铸铁，包括如下重量百分比组分：C：3.73‑3.78％；Si：2.31‑2.40％；Mn：0.25‑0.32％；P≤0.015％；S：0.006‑0.012％；Cu：0.15‑0.20％；Y：0.0040‑0.0050％；La：0.0012‑0.0020％；Mg：0.038‑0.048％；余量铁和不可除杂质。本发明的目的在于提供一种QT400‑18AR球墨铸铁、轧辊和球墨铸铁的制备方法，当该规格的球墨铸铁用于轧辊以及轧辊上的试块时，其性能反映和匹配准确，其抗拉强度、冲击值、屈服强度、断后伸长率和心部套样疲劳强度均表现优异。
摘要（英）：

The invention belongs to the field of nodular cast iron, and discloses a QT400-18AR nodular cast iron, which comprises following components in percentage by weight: 3.73 to 3.78% of C, 2.31 to 2.40% of Si, 0.25 to 0.32% of Mn, not more than 0.015% of P, 0.006 to 0.012% of S, 0.15 to 0.20% of Cu, 0.0040 to 0.0050% of Y, 0.0012 to 0.0020% of La, 0.038 to 0.048% of Mg, and the balance being iron andinevitable impurities. The invention aims to provide a QT400-18AR nodular cast iron, a roller, and a preparation method of the nodular cast iron. When the nodular cast iron is used to produce a rollerand a test block on the roller, the performance representing and matching are precise, and the tensile strength, impact value, yield strength, percentage elongation after fracture, and central sleevefatigue strength are excellent.

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