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发明公开
CN103556047A 一种450MPa级抗氢致开裂压力容器用钢板及其生产方法 有权

一种450MPa级抗氢致开裂压力容器用钢板及其生产方法
摘要：
一种450MPa级抗氢致开裂压力容器用钢板及其生产方法，属于压力容器用钢板领域。钢板的化学成分以重量百分比计为C：0.13%-0.14%，Si：0.20%-0.30%，Mn：0.90%-0.95%，P：≤0.008%，S：≤0.001%，其余为Fe和不可避免的杂质。通过C、Si、Mn三种合金元素的合理添加，匹配相应的轧制工艺，经过正火热处理，在满足一般压力容器钢力学性能的基础上，屈服强度≥300MPa，抗拉强度≥450MPa，延伸率≥30%，0℃冲击功≥200J，具有良好的抗氢致开裂性能，裂纹长度率≤5%，裂纹宽度率≤1.5%，裂纹敏感率≤0.2%。具有制造流程短，生产成本低的特点。
摘要（英）：

The invention relates to a 450MPa-grade hydrogen-induced-cracking-resistant pressure vessel steel plate and a production method thereof, belonging to the field of pressure vessel steel plates. The steel plate comprises the following chemical components in percentage by weight: 0.13%-0.14% of C, 0.20%-0.30% of Si, 0.90%-0.95% of Mn, at most 0.008% of P, at most 0.001% of S, and the balance of Fe and inevitable impurities. The reasonable addition of the three alloy elements C, Si and Mn is matched with a corresponding rolling technique, and normalizing heat treatment is performed; and thus, on the premise of satisfying the mechanical properties of the common pressure vessel steel, the yield strength is greater than or equal to 300MPa, the tensile strength is greater than or equal to 450MPa, the elongation percentage is greater than or equal to 30%, and the 0 DEG C ballistic work is greater than or equal to 200J; the steel plate has favorable hydrogen induced cracking resistance; and the crack length ratio is smaller than or equal to 5%, the crack width ratio is smaller than or equal to 1.5%, and the crack sensitivity is smaller than or equal to 0.2%. The production method has the characteristics of short manufacturing process and low production cost.

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