共查询到17条相似文献,搜索用时 609 毫秒
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为满足市场对高强度高抗挤毁套管的需求,天津钢铁集团有限公司开发了80ksi钢级抗硫抗挤毁石油套管钢27CrMo圆坯。介绍了该石油套管钢的生产工艺路线,通过对钢中的磷硫含量、全氧含量、五害元素及气体含量的控制,使圆坯产品实现了生产。经检验,成品石油套管的抗硫性能和抗挤毁性能完全满足相关标准的要求,化学成分稳定,铸坯质量良好。 相似文献
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《天津冶金》2014,(2)
<正>高抗挤毁套管具有比API Spec 5CT同规格同钢级石油套管更高的抗挤毁性能,分为三个系列。*API Spec 5CT标准规格系列的高抗挤毁套管:*具有特殊通径要求的API Spec 5CT规格高抗挤毁套管;*适应于盐岩层、盐膏层、泥岩层、注水层等复杂地层的非API规格系列的超高强度厚壁高抗挤毁套管:目前已经成功开发出几十个规格的高抗挤毁石油套管。钢级包括:TP80T、TP95T(T)、TP110T(T)、TP125T(T)、TP130TT、TP140TT、TP150TT等。不仅在国内大部分油田得到使用,而且已经大量出口美国、加拿大、中东、非洲等国家和地区。 相似文献
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根据C90耐腐蚀油管对力学性能和抗腐蚀性能的要求,设计和开发出成分(%)为:C 0.24,Cr3.05,Mo 0.48,Ti 0.02的Cr3型C90级耐腐蚀油管用钢。衡钢采用30 t EBT电弧炉-LF(VD)-Φ110~140 mm HCC工艺生产的Cr3型C90级耐腐蚀管用钢力学性能为σ0.5 680 MPa,σb 780 MPa,δ50 24%,AKV 51~60 J。按API5CT试验,该钢抗硫化氢应力腐蚀率为:液相0.2375 mm/a,气相0.6263 mm/a,优于28CrMoTi钢和SM90钢。 相似文献
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石油天然气工业是低合金高强度钢、微合金化钢的主要用户之一。每年石油管(油井管和油气输送管)的投资约占石油工业总投资的1/5。 在石油工业的用钢总量中,油井管占40%以上。1949~1993年,我国陆上石油工业累计钻井14万口,进尺2.396×10~8m,消耗油井管1.28×10~7t,进口量占消耗量的90%,共用去外汇75亿美元。 油井管不属于一般的冶金产品,而是在低合金钢无缝管或棒材基础上经过深加工(压力加工、焊接、机 相似文献
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对621MPa(90ksi)级抗硫化氢腐蚀油井套管用钢的合金设计、热处理工艺以及组织和性能关系进行了研究,分别设计了0.08C-0.8Mn和0.20C-0.8Mn 2种低碳-低锰试验钢,并重点研究了经调质处理后试验钢的位错、析出物和碳化物对SSCC性能的影响。研究结果表明,采用低碳-低锰,结合Nb、V、Ti和B的微合金设计,通过适当的调质热处理工艺可以获得优良的力学性能、韧性和抗硫化氢应力腐蚀开裂性能,满足相关标准的要求。研究结果还表明,不共平面的位错群、细小的析出物以及弥散的高球化率碳化物,可以使钢具有很好的抗硫化氢应力腐蚀开裂性能。 相似文献
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《Baosteel Technical Research》2010,(Z1):71
From the viewpoint of energy-saving and environment protection,it is necessary to develop Ultra Super Critical(USC) fossil-fired power plants.In order to ensure the reliable operation of power plants under high steam conditions,good mechanical properties(particularly high creep strength),corrosion resistance and fabricability are generally required for the heat resistant steels used in USC boilers.Among these heat-resistant steels,S30432 austenitic heat-resistant steels are of interest due to high creep strength,excellent oxidation and corrosion resistance at temperatures up to 650 -700℃.In this paper,the strengthening mechanism of S30432 austenitic heat-resistant steel was investigated based on the precipitation behavior of S30432 during aging and creep at 650℃.Results show that the microstructure of as-supplied S30432 steel is austenite,the main precipitation consists of only Nb(C,N).After aged for 10 000 h or crept for 10 712 h,there is a slight increase in the size of fine Nb(C,N),but the transformation from Nb(C,N) to NbCrN does not occur.Aging and creep results in the precipitation ofε-Cu and M23C6.The coarsening velocity ofε-Cu particles diminishes greatly and they are still very fine in the long-term creep range.With the increase of aging and creep time M23C6 carbides tend to coarsen gradually.The size of M23C6 is larger and the coarsening is easier in contrast toε-Cu and Nb(C,N).Nb(C,N) precipitates in the as-supplied microstructure,while aging and creep result in the precipitation ofε-Cu and M23C6.High creep rupture strength of S30432 steel is attributed to the precipitation hardening ofε-Cu,Nb(C,N) and M23C6.Extremely,ε-Cu plays an important role in improving the creep rupture strength of S30432,and at least 61%of the creep rupture strength of S30432 at 650℃results from the precipitation hardening ofε-Cu particles. 相似文献
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S. A. Muboyadzhyan L. P. Egorova D. S. Gorlov E. E. Bulavintseva 《Russian Metallurgy (Metally)》2017,2017(1):1-9
The corrosion resistance of an Ni–Co–Cr–Al–Si–Y + SPh (SPh is silicophosphate impregnation) alloy coating on 30Kh13, 38Kh2MYuA, VKS5, and VKS7 structural steels with low tempering temperatures has been studied. The steel–coating compositions have been tested to determine the accelerated cyclic corrosion resistance, the corrosion resistance under tropic climate chamber conditions and in salt fog, the stress corrosion resistance, and the corrosion resistance in an industrial atmosphere. The heat stability of coated samples is studied, metallographic studies of the samples before and after the tests are performed, and the influence of the coating on the strength characteristics of the structural steels is studied. 相似文献
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为了研究Cr5和Cr7(质量分数/%)钢在CO2-EOR高温高压服役条件下的腐蚀机理,利用高温高压反应釜模拟其腐蚀行为,使用失重法测定了腐蚀速率,采用SEM、EDS、XRD和XPS等手段对腐蚀产物进行了观察与分析,探讨了试验钢在CO2条件下的腐蚀机理,并提出了腐蚀模型。研究结果表明,Cr5钢的腐蚀速率为0.734 75 mm/a,Cr7钢的腐蚀速度为0.217 32 mm/a;腐蚀产物均由外层的FeCO3晶体以及内层的非晶态FeCO3和Cr(OH)3组成;腐蚀初期,产物膜以原位形成和阳极溶解后逐渐沉积两种途径生成;产物完全覆盖基体后,离子在界面处的扩散后沉积成为产物膜生长的主要途径。 相似文献