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    油井管調(diào)質(zhì)處理時的表面氧化皮成因及其影響

    Elements Responsible for Formation of and Influence by Surface Scale of Oil Well Pipe during Quenching & Tempering

    • 摘要: 分析了油井管調(diào)質(zhì)處理時表面氧化皮的產(chǎn)生因素及其脫落情況。N80Q等高鋼級油井管調(diào)質(zhì)處理時,若燃燒氣氛、加熱溫度、加熱時間和鋼的化學成分相對穩(wěn)定,則管體表面氧化皮的殘余量主要受熱處理前管體表面粗糙度的影響,而受燃燒氣氛的影響較弱。制管廠在軋管時應(yīng)盡可能提高管體表面的光潔度,表面粗糙度Ra應(yīng)在3.2以下;鋼管如果露天存放,應(yīng)進行防腐處理,以延緩其表面腐蝕;管體表面的氧化皮殘余量應(yīng)盡可能少,以保證油井管防腐層的附著力。

       

      Abstract: Investigated are elements responsible for formation and peeling of surface scale of the oil well pipe during quenching & tempering treatment. It is identified that for oil well pipes of high grades like N80Q, provided relevant elements such as combustion atmosphere, heating temperature and time as well as the chemical composition of the steel are relatively consistent, the amount of the said surface residual scale is mainly related to the surface roughness of the pre-heat treatment pipe, and much less influenced by the combustion atmosphere. Accordingly, it is recommended that the surface finish of the tube as being rolled has to be as improved as possible, and that the roughness of the tube should be under 3.2;in case of storing the tube in open air, anti-corrosion treatment needs to be made so as to prolong the normal surface condition;and at last the surface residual scale amount needs to be as reduced as possible to ensure good adhesion of the anti-corrosion coating of the oil well pipe.

       

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