34Mn6调质生产N80Q钢级套管工艺初探

文章介绍了采用K55钢级(材质为34Mn6)调质生产N80Q套管的工艺研究过程,经现场生产结果证明,用34Mn6生产N80Q钢级套管是可行的.     

非调质钢N80 Φ139.7 mm×9.17 mm石油套管的研制

根据C、Mn、V、N、Ti在微合金化非调质钢中作用,设计了石油套管用非调质N80钢的化学成分;依据实验室炉正火实验数据确定在线正火轧制工艺参数,研制的139.7 mm×9.17 mm非调质N80钢石油套管的组织为铁素体+珠光体组织,屈服强度575～638 MPa,抗拉强度789～840 MPa,伸长率21%～23%,0℃3/4尺寸冲击功39～87J,完全满足API Spec 5CT《油套管规范》(第十版,2018)标准的要求。     

N80级石油套管在线常化工艺的优化

研究42Mn2V和40Mn2V钢在不同冷却条件下的相变温度和组织，分析荒管连轧后中间冷却终止温度和冷却速度、再加热温度对套管的奥氏体晶粒组织及力学性能的影响。结果表明：中间冷却过程中奥氏体完全分解，以及合理的在线常化加热温度是改善套管冲击韧性的关键。对42Mn2V钢在线常化工艺生产N80级石油套管，提出了合理的工艺控制参数。     

转炉开发N80级非调质石油套管钢的实践

介绍了天津钢铁有限公司开发的N80级非调质石油套管钢的技术特点、工艺流程。实践证明，该工艺生产的产品化学成分、机械性能符合标准要求，用户满意。     

N80级ERW石油套管用钢的组织转变及性能

采用C-Mn-Nb-Ti微合金化成分设计,低P、低S冶炼以及合理的控轧控冷工艺,充分发挥细晶强化和析出强化作用,研制出N80级石油套管用试验钢.测定了N80级ERW石油套管用钢的连续冷却转变曲线(CCT曲线),研究不同冷速对相变产物的影响.     

包钢N80Q钢级石油套管的开发和生产

根据套管的服役条件,高钢级石油套管的生产已是势在必行.包钢通过对N80Q钢种和热处理工艺的研究,成功地开发生产了性能满足标准要求和用户需要的N80Q钢级石油套管.     

33Mn2V非调质油井管钢的相变特性及其应用

研究了新型热轧非调质无缝油井管用33Mn2V钢，实验确定了该钢在加热过程和950摄氏度奥氏体化后冷却过程的相变点，以及1100摄氏度奥氏体化不变形条件下和1200摄氏奥氏体化并模型实验穿管、轧管变形条件下的两种过冷奥氏体连续转变曲线，提出一种不同于业界至今仍普通认同的观点，即“在线常化”技术不是生产N80钢级非调质热轧油井管必不可少的工艺途径，此观点已获工业生产现场取样的验证。     

R95钢级石油套管产品开发

文章阐述了用含稀土低合金钢采用水淬调质热处理工艺,生产R95钢级石油套管的实验室及工业试验过程,试验室及工业试验结果表明,该方法生产的R95钢级石油套管的性能符合标准要求,采用含稀土低合金钢采用水淬调质热处理工艺还可以降低生产成本。     

钢管在线加速冷却技术开发

研究了化学成分和生产工艺参数对钢管在线加速冷却后组织、性能的影响.结果表明,材料经过穿孔工序或连轧工序后,为奥氏体完全动态再结晶组织;经过张减工序后,为加工硬化状态的奥氏体组织.采用轧后余热和水气复合冷却方式对钢管外表面加速冷却,可以保证钢管轴向、周向、径向3个方向上的强度和硬度均匀性.采用25MnVN或25MnMoVN之类微合金钢,经过轧后加速冷却,可以不经过调质热处理,生产出性能完全满足要求的N80钢级石油套管.     

坚持原创性研究 振兴我国钛工业——攀钢与中科院合作开发新型氯化工艺技术及装备

笔者日前获悉,国内两家知名的钢管生产企业最近使用攀钢37Mn5石油套管专用钢坯进行批量投料试验后,轧管成材率达到国内先进水平,用户要求进一步扩大订货量。37Mn5管坯钢是生产J5 5级石油套管的专用钢种,对其规格尺寸、表面质量和内部低、高倍组织的要求较严。攀钢于2 0 0 2年采用模铸工艺开发成功37Mn5管坯钢,虽然市场形势一直较好,但其质量尚有不尽如人意之处。攀钢大方坯连铸投产后,课题组采取多项技术措施适应新、老工艺的转变并优化工艺参数,2 0 0 4年2月首次试制了近30 0 0t 130mm37Mn5连铸管坯钢供衡阳和常州用户试用。两家用户对…     

Acceleration of Electricity Reform Brings Benefit to Big Electricity Users,Aluminum Manufacturers Can Save Costs Up to Several Hundred Million

<正>Recently the National Commission of Development and Reform again assembled experts to solicit opinions,and discussed new electricity reform program.According to information disclosed by experts attending the meeting,in the future electricity reform will undergo top-down design,possibly a     

Qinghai's Aluminum Processing Capacity to Rise at the End of the Year

正Since the release of Implementation Opinions on Carrying out‘Guiding Opinions of the State Council on Resolving Serious Production Overcapacity Conflicts’,according to the actual situation of industry,Qinghai has focused on electrolytic aluminum,cement,ironsteel(including iron alloy and silicon carbide),     

Recent Trends in China's Copper Scrap Market-Part Ⅱ

<正>2.Tianjin Scrap Metal Market In Tianjin,we mainly visited Jinghai Ziy Town scrap market and Binhai New Area’some copper scrap enterprises and enterprise using copper scrap.In Ziya we felt the coppe scrap market was particularly deserted,mos copper scrap enterprises in the town wer closed,industry insiders said in 2012 the plac here was bustling with activity.According to     

Shanghai Clearing House to Roll out Renminbi-denominated Copper Clearing Operations in Free Trade Zone

正Clearing House Financial Markets Co.,Ltd.(Shanghai Clearing House)General Manager Xie Zhong told the media recently at the briefing of the international symposium of"Reform Deepening and Mechanism Innovation of the Post-crisis Kerb Market",Shanghai Clearing House will explore the feasibility of carrying out bond business in     

Development and Application of New Materials for Copper Processing in China

正After over 60 years of developmnt,a system for RD and production of copper processing materials has already taken shape in China.After the reform and opening-up,the application of copper processing materials has gradually expanded from the military industry to civil field.The annual output of copper     

China’s Mineral Exploration Market Downturn Causes Decline of Investment in Bauxite

<正>According to a survey report conducted recently by China Geological Survey Development Research Center,in the first half of 2014,China’s mineral exploration market continued to decline,with the investment in exploration of non-fuel minerals dropping by13.7%and drilling workload dropping by21.7%.According to statistical analysis of the Center,     

Fabricated Copper Production by Province or City in 2014

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Zinc Production by Province in 2014

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China's Aluminum Alloy Cable Market has Taken Shape

正Aluminum alloy cable is a mature product and technology that has been used for nearly fifty years in the U.S.Through six years’promotion,it has been widely recognized and accepted in the China market since 2013,which laid the foundation for the development of the aluminum alloy cable market.Aluminum alloy cable is widely applied in the fields of civil construction and industrial and mining enterprises,especially in real estate,steel and metallurgy.     

Qinghai to Build a 100 Billion Yuan Lithium Industry Base

正At 2014 China Qinghai Trade Fair for Green Development Investment,Qinghai EV Rally2014 was introduced for the first time.With electrical vehicles’eco-friendly features,Qinghai manifested its determination on green development.Introducing Qinghai EV Rally was just a signal.By leveraging its rich salt lake resources