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    X80Q鋼級海洋樁腿支撐管的研制

    Research and Development of X80Q Steel Tube Used as Offshore Platform Leg Support

    • 摘要: 介紹了X80Q鋼級海洋樁腿支撐管的化學(xué)成分和設(shè)計方案；歸納了生產(chǎn)過程中的工藝控制要點，通過試驗確定其最佳熱處理工藝；并評定其力學(xué)性能和焊接工藝。試驗結(jié)果表明：以低C含Mn鋼為基礎(chǔ)，加入Cr、Mo、Ni、V、Ti、Nb等微合金元素可提高X80Q鋼級海洋樁腿支撐管的強度，細化晶粒，降低其過熱敏感性；在淬火溫度930℃、回火溫度625℃時，其組織均勻、晶粒細?。划a(chǎn)品力學(xué)性能和焊接性能較好，能滿足用戶要求。

       

      Abstract: Elaborated in the paper are the chemical composition and design scheme of the X80Q steel tube used as the offshore platform leg support. The key process control points for manufacture of the tube are summarized，and the best heat treatment process is determined via relevant tests. Furthermore，the mechanical properties of and welding process for the tube are evaluated. The test results lead to such a conclusion that with low C and Mn-containing steel as the base material，and owing to addition of micro-alloy elements namely，Cr，Mo，Ni，V，Ti and Nb，the strength of the tube is enhanced，and its grains are refined to reduce its thermal sensitivity. With 930℃quench temperature and 625℃temper temperature，the tube possesses homogeneous microstructure and fine grains. Moreover，both the mechanical properties and welding performance of the tube are good，and satisfactory to the customer requirements.

       

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