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    CB80海洋管線管用無縫鋼管的研制

    R & D of CB80 Seamless Steel Marine Linepipe

    • 摘要: 根據(jù)深海管線管用無縫鋼管的服役特點(diǎn)，設(shè)計(jì)開發(fā)出具有良好耐腐蝕性的CB80海洋管線管用無縫鋼管。分析CB80海洋管線管用無縫鋼管的鋼種化學(xué)成分，介紹其熱處理工藝，并檢驗(yàn)樣管的各項(xiàng)力學(xué)性能及耐腐蝕性。試驗(yàn)結(jié)果表明：該CB80無縫鋼管具有良好的低溫韌性，以及耐海水腐蝕和耐酸性介質(zhì)腐蝕的能力，其理化性能指標(biāo)也達(dá)到API Spec 5L—2012對(duì)X80Q鋼級(jí)的要求。通過萃取復(fù)型和透射電鏡的方法對(duì)析出的第二相粒子進(jìn)行研究，發(fā)現(xiàn)其主要為NbC和TiN析出相。

       

      Abstract: Based on the service characteristics of the deep ocean-purposed seamless steel linepipe,the CB80 seamless steel marine linepipe with fine corrosion-resistance is designed and developed.Described here in the essay are the main aspects associated with the said seamless steel marine linepipe,such as the steel chemical composition analysis,the heat treatment process and mechanical properties and corrosion resistance as resulting from testing of the trail pipes.The testing results show that the CB80 seamless steel pipe is in possession of fine low-temperature toughness and resistance against seawater corrosion,good resistance against corrosion of acidic medium and physiochemical properties up to the requirements for X80Q steel as specified under API Spec 5 L—2012.After studying on the second phase particles with the extraction complex method and the transmission electron microscopy,it is revealed that the particles consist mainly the NbCand TiN precipitated phases.

       

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