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发明公开
CN104894492A 一种超低温大口径WPHY80级三通管件专用钢板及其制备方法 失效 - 权利终止

一种超低温大口径WPHY80级三通管件专用钢板及其制备方法
摘要：
本发明属于低合金高强度管线钢的技术领域，具体的涉及一种超低温大口径WPHY80级三通管件专用钢板及其制备方法。该种超低温大口径WPHY80级三通管件专用钢板，该专用钢板的化学成分按重量百分比为：C：0.04～0.06%，Si：0.50～0.80%，Mn：1.40～1.80%，P≤0.008%，S≤0.002%，Nb：0.08～0.12%，Ti：0.04～0.06%，Mo：0.30～0.40%，Cu：0.12～0.20%，Ni：0.30～0.40%，Cr≤0.50%，V:0.050～0.060%，B≤0.0005%，余量为铁和不可避免的杂质。在提高现场生产效率前提下，生产出的专用钢板性能稳定，特别是具有优异的低温落锤性能：-25℃SA%≥90%和夏比冲击性能：-60℃夏比冲击功≥260J，-80℃夏比冲击功≥210J。
摘要（英）：

The invention belongs to the technical field of low-alloy and high-strength pipeline steel and particularly relates to an ultralow-temperature, large-diameter and WPHY80-level steel plate special for a three-way pipe fitting and a production method of the steel plate. The steel plate comprises, by weight percentage, 0.04-0.06% of C, 0.50-0.80% of Si, 1.40-1.80% of Mn, not more than 0.008% of P, not more than 0.002% of S, 0.08-0.12% of Nb, 0.04-0.06% of Ti, 0.30-0.40% of Mo, 0.12-0.20% of Cu, 0.30-0.40% of Ni, not more than 0.50% of Cr, 0.050-0.060% of V, not more than 0.0005% of B, and the balance of iron and inevitable impurities. Under the premise that field production efficiency is increased, the produced steel plate is stable in performance, the steel plate has excellent low-temperature drop weight tear test performance: -25 DEG C SA%>=90% and excellent Charpy impact performance: -60 DEG C Charpy impact energy>=260J, -80 DEG C Charpy impact energy>=210J.

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