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    超級(jí)13Cr抗CO2腐蝕油管熱軋缺陷原因分析與控制

    Analysis and Control of Cause for Defect of Super 13Cr Anti-CO2 Corrosion Oil Tubing as Occurred during Hot-rolling Process

    • 摘要: 簡(jiǎn)要介紹了超級(jí)13Cr油管的開(kāi)發(fā)背景、生產(chǎn)工藝流程及主要技術(shù)指標(biāo)；通過(guò)理化檢驗(yàn)和金相分析，探討了超級(jí)13Cr油管穿孔、熱軋典型缺陷形成的主要原因，并提出改進(jìn)措施；介紹了工藝改進(jìn)后超級(jí)13Cr油管的實(shí)物質(zhì)量水平及現(xiàn)場(chǎng)應(yīng)用情況。分析認(rèn)為：δ鐵素體的存在是造成超級(jí)13Cr油管表面出現(xiàn)熱軋缺陷的主要原因；通過(guò)合理設(shè)計(jì)超級(jí)13Cr鋼種的化學(xué)成分，嚴(yán)格控制坯料加熱溫度，可有效控制δ鐵素體的產(chǎn)生。

       

      Abstract: Briefed in the paper are the development background, the manufacturing process flow and the main technical specifications of the super 13Cr oil tubing.The main causes for the typical defects of the said tubing as occurred during piercing and hot-rolling processes are investigated via related physical inspection and chemical analysis as well as metallographic analysis.Accordingly, relevant improvement measures are proposed and taken. Also elaborated here are the physical quality level and the feedback from the field operation of the super 13Cr oil tubing as produced with the improved manufacturing process.The analysis identifies that the existance of ferrite δ is the main cause for the said defect.Therefore ferrite δ will be effectively controlled via actions as proper design of the chemical composition of the 13Cr steel, and strict control of the billet heating temperature.

       

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