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发明公开
CN105586534A 一种特厚低韧脆转变温度的热轧H型钢及其生产方法 有权

一种特厚低韧脆转变温度的热轧H型钢及其生产方法
摘要：
本发明属于钢铁技术领域，具体地，本发明涉及一种特厚低韧脆转变温度的热轧H型钢及其生产方法。本发明的热轧H型钢的化学成分按照质量百分比计包括：C 0.08～0.15％、Si 0.10～0.40％、Mn 1.0～1.5％、P≤0.015％、S≤0.008％、V 0.020～0.070％、Ti 0.005～0.025％、N 0.006～0.015％、Ni 0.10～0.50％，其余为铁和残余的微量杂质。H型钢的翼缘厚度在25mm～36mm之间，腹板高度在700mm～1000mm之间，轧制压缩比小于3.5，采用热轧工艺(不采用水冷、超快冷、热处理等工艺)生产。最终产品的屈服强度在420Mpa以上，抗拉强度500Mpa以上、韧脆转变温度低于-65℃，具有良好耐-45～-65℃低温夏比冲击功。
摘要（英）：

The invention belongs to the technical field of steel and particularly relates to ultra-thick hot-rolled H-shaped steel with a low ductile-brittle transition temperature and a production method thereof. The hot-rolled H-shaped steel is composed of, by mass, 0.08%-0.15% of C, 0.10%-0.40% of Si, 1.0%-1.5% of Mn, 0-0.015% of P, 0-0.008% of S, 0.020%-0.070% of V, 0.005%-0.025% of Ti, 0.006%-0.015% of N, 0.10%-0.50% of Ni, and the balance Fe and residual trace impurities. The flange thickness of the H-shaped steel is between 25 mm and 36 mm. The web height of the H-shaped steel is between 700 mm and 1000 mm. The rolling compression ratio of the H-shaped steel is lower than 3.5. The H-shaped steel is produced through a hot rolling process (instead of processes such as water cooling, ultrafast cooling and heat treatment). As for a final product, the yield strength reaches 420 Mpa or more, the tensile strength reaches 500 Mpa or more, the ductile-brittle transition temperature is lower than -65 DEG C, and the final product has good resistance to Charpy impact energy at the low temperature of -45DEG C to -65DEG C.

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