高酸性腐蚀油气田用镍基合金油套管开发现状

高酸性油气田逐渐被发现和开采,开采环境中H2S、CO2、S、Cl-含量很高,常用的13Cr、22Cr、316等不锈钢管材已无法满足开采需求,因此镍基耐蚀合金逐渐应用于油套管中。介绍了国内外各大钢管厂镍基合金油套管开发现状,分析结果表明我国镍基合金油套管的开发与国外产品有明显差距。     

宝山钢铁股份有限公司开发出不同钢级牌号的镍基合金系列油套管产品

<正>宝山钢铁股份有限公司解决了镍基合金系列油套管产品制造过程中的冶炼、析出相控制、热挤压、管加工等关键工艺技术难题,相继开发出BG2250、BG2830、BG2532、BG2235、BG2242等不同钢级牌号的镍基合金系列油套管产品,并且在     

油套管表面防护技术的研究现状与展望

综述了油套管表面防护技术的研究现状,介绍了油(气)田开发过程中油套管的腐蚀特征、腐蚀类型以及力学和服役环境条件对油套管的基本要求,分析了表面涂镀层工艺、激光表面强化工艺及表面合金化工艺等表面技术的特点及其在油套管表面防护中的应用,提出采用热渗镀技术在油套管表面制备镍基合金层以应对严酷服役条件的新工艺。展望了油套管表面技术新思路和方法。     

镍基合金带极堆焊技术在稳压器制造中的应用

为满足稳压器下封头电加热器套管的装配和焊接固定,需要在其内壁堆焊镍基合金台阶并加工出接管孔,堆焊焊材为Inconel 690合金。针对稳压器封头的镍基凸台结构,采用镍基合金焊带开发带极堆焊工艺方案,进行了焊接工艺评定和试验件的实际焊接。结果表明,采用镍基合金带极堆焊技术进行稳压器下封头镍基凸台的堆焊,各项性能指标和质量控制均能满足产品制造技术要求。     

宝钢制造的目前国内规格最大的镍基合金套管在川东北成功下井

<正>2011年11月,宝钢全流程制造的国内规格最大、钢级最高的气密封镍基合金套管(Φ193.68mm×12.7mm BG2250-125BGC套管)在川东北元坝区块成功下井,这标志着我国高端镍基合金油套管产品实现了从品种、规格到钢级的全面国产化。川东北区块位于四川省东北部,是中石化、中石油近年来重点开发的区块,井况复杂,且H2S和CO2等腐蚀性气体     

核电蒸发器水室隔板用镍基合金厚板的研制新进展

介绍了宝钢特钢压水堆核电站蒸汽发生器下封头水室隔板用镍基合金厚板在成分优化、大钢锭均质化制造、热加工技术和热处理组织均匀性控制等方面的技术进步。采用该技术的镍基合金热轧厚板产品已具备产业化制造能力。镍基合金热轧厚板产品组织及力学性能全部满足水室隔板设计标准要求,可完全替代进口。     

国产镍基合金电渣堆焊在反应器制造中的应用

为满足对苯二甲酸加氢精制反应器抗腐蚀要求,在壳体内壁堆焊镍基合金,确定了内壁堆焊时采用国产镍基合金EQNiCrMo-3焊带进行过渡,采用EQNi CrMo-4焊带进行表层电渣堆焊的工艺方案,进行了焊接工艺评定,得到最佳的焊接工艺参数。试验结果表明,国产镍基合金焊带堆焊工艺性良好,各项性能指标满足产品制造技术要求,并完成产品制造。     

宝山钢铁股份有限公司生产的中127mm镍基合金套管下井成功

近日．宝山钢铁股份有限公司生产的Ф127mm镍基合金套管在四川省东北部元坝103H井下井成功,成为国内首家具备镍基合金油管和套管生产能力的企业。     

宝山钢铁股份有限公司生产的Φ127mm镍基合金套管下井成功

<正>近日,宝山钢铁股份有限公司生产的Φ127mm镍基合金套管在四川省东北部元坝103H井下井成功,成为国内首家具备镍基合金油管和套管生产能力的企业。     

瞬时液相扩散连接在镍及镍基合金焊接中的应用

针对镍及绦基合金在焊接过程中易出现热裂纹和气孔等问题,介绍了其瞬时液相扩散连接.叙述了瞬时液相扩散连接的理论、温度、压力和中间层等重要参数,分析了瞬时液相扩散连接镍及镍基合金在的优越性.描述了瞬时液相连接技术在镍及镍基合金焊接中的应用情况,并展望了瞬时液相连接技术的应用前景.     

Study of the basic welding characteristics of Mg alloy

Offering the advantages of lightweight and high specific strength, magnesium (Mg) alloys are extensively used in the manufacture of automotive parts and light-gauge box-type products, such as laptop computers, mobile phones, etc, which are expected to see lighter-weight applications in future. Presently available Mg alloy products, however, are manufactured by molten or semi-molten working in diecasting or thixomoulding processes, with applications technology currently at the development stage. Suitable techniques for the further development of Mg alloy manufacturing technology include plastic working of wrought alloys and assembly of products with complex shapes by welding. This study focuses on TIG welding as a widely practised and convenient technique for assembly of general metal products. The article examines the basic welding characteristics of an Mg alloy equivalent to AZ31 as an Mg alloy in widespread practical use together with the deformation properties of the proposed alloy. A suitable welding procedure is then investigated. Also discussed is an assembly method for products in consideration of the working and welding characteristics of the proposed alloy.     

Characterization and analysis of non-metallic inclusions in Ni42-Fe expansive alloy

Cracks and ruptures always occur during wire drawing process of 42% nickel-iron expansive alloy. In order to study the reasons of these phenomena, a method of metallographic observation in combination with sample electrolysis was used to characterize the non-metallic inclusions in the alloy wire. The results indicate that the inclusions in the alloy are oxidation products during the process of melting. There are single or complex phase inclusions composed of elements such as Al, Si, Ca, Ti, Fe, and O2. Among them, the macro-inclusions are TiO2 compound inclusions formed by the adhesion of Al and Si oxides on them. These inclusions are fragile ones with a low strain rate, as well as a rather high hardness, so that they are the main reason that leads to the surface cracks and ruptures in the alloy wires. The analysis has educed that the key point to enhance the product quality is to promote the cleanliness of the melt, control the types and quantity of non-metal inclusions in the alloy.     

镁合金消失模铸造模样的热解特征

采用气相色谱分析的方法对三种泡沫模样:聚苯乙烯(EPS)、共聚物(StMMA)、聚甲基丙烯酸甲酯(EPM-MA)的热解特性进行了分析,同时对镁合金消失模实际浇注的热解气体进行了测试,得出了镁合金消失模不周泡沫模样热解产物的种类和分布.研究指出,StMMA的品质及其热解特性表明它更适合于镁合金消失模铸造,有利于高性能复杂薄壁镁合金消失模铸件的成形.     

金胜铝业公司的工业挤压材专用合金

简要介绍金胜铝业公司研发的几种生产工业挤压材的专用铝合金的化学成分和性能,它们是超高强度的H755铝合金、无粗晶环的H601铝合金、高蠕变性能的MO34铝合金、绿色的可高速切削的M662铝合金和有特色的6063型铝合金。这几种铝合金在替代同类传统铝合金生产某些工业挤压材时表现出了优越性。     

氟盐法制备Al-Ti-B中间合金的研究

介绍了一种采用氟盐与铝液在高温下反应,制取Al5Ti1B中间合金细化剂的方法。从Ti、B的回收率、反应生成物以及微观组织的角度,对加料工艺、作用时间、搅拌强度等工艺因素做了分析。另外,对制取产品的细化效果进行研究。结果表明,在Ti加入量为0.05%~0.10%之间细化效果最好,该合金细化有效时间约为6 h。还在Al-Ti-B基础上引入稀土元素制取Al-Ti-B-RE中间合金细化剂,可进一步提高细化效果和长效性。     

我国钛科学技术的发展动向和新进展：第9届全国钛及钛合金学术交流会述评

根据第９届全国钛及钛合金学术交流会论文集１６２篇论文中提供的资料，从新合金、新工艺和新产品及基础理论研究４个方面概述了我国钛科学技术发展的动向和新的进展。     

Microstructural evolution and corrosion behavior of directionally solidified FeCoNiCrAl high entropy alloy

The FeCoNiCrAl alloys have many potential applications in the fields of structural materials, but few attempts were made to characterize the directional solidification of high entropy alloys. In the present research, the microstructure and corrosion behavior of FeCoNiCrAl high entropy alloy have been investigated under directional solidification. The results show that with increasing solidification rate, the interface morphology of the alloy evolves from planar to cellular and dendritic. The electrochemical experiment results demonstrate that the corrosion products of both non-directionally and directionally solidified FeCoNiCrAl alloys appear as rectangular blocks in phases which Cr and Fe are enriched, while Al and Ni are depleted, suggesting that Al and Ni are dissolved into the NaCl solution. Comparison of the potentiodynamic polarization behaviors between the two differently solidified FeCoNiCrAl high entropy alloys in a 3.5%NaCl solution shows that the corrosion resistance of directionally solidified FeCoNiCrAl alloy is superior to that of the non-directionally solidified FeCoNiCrAl alloy.     

Review of alloy and process development of TiAl alloys

The improved understanding of the factors that control microstructure and properties of TiAl alloys is reviewed together with current work aimed at developing both wrought and cast products. It is suggested that the choice of alloy composition is perhaps far simpler than the complex literature would suggest and the factors that underlie alloy choice will be explained. These factors include the processability of the alloy as well as the properties and examples will be given where this dual approach of defining both processability and properties is central to the successful application. In addition other aspects of processing that will be discussed include cost-effective processing, accuracy of compositional control and control of processing conditions appropriate for the specific alloy. Some current applications of TiAl components are summarised before considering some of the challenges still remaining for TiAl-based alloys.     

钢铁材料研发的技术进展

中国的钢铁材料研发活动越来越活跃,研发领域不断拓展,先进钢铁材料不断涌现。钢铁研究总院结构材料研究所致力于先进钢铁材料的研发,取得了显著的成绩。本文综述近年来的各个钢铁材料领域研发的技术进展,包括了碳素结构钢、高强度低合金钢、合金结构钢、超高强度钢、轴承钢、不锈钢及耐蚀合金、耐热钢及合金、工模具钢,以及相关技术等。通过持续的技术研发活动,钢铁材料已经和必将不断发展和更新,形成了以“高性能、低成本、易加工、高精度、绿色化”为特征的先进钢铁材料。     

Numerical simulation and experimental study for rheo-forged component using direct and indirect die system

Sand casting and die casting processes have been used widely for complex automotive products such as knuckle, arm, etc. Usually, a part fabricated by casting has limited strength due to manufacturing defects such as the dendrite structure, segregation and porosities. As an attempt to offer a solution to these problems, forging has been used as an alternative process. However, the forging process provides limited formability for complex shape products. Rheo-forging of metal offers not only superior mechanical strength but also requires significantly lower machine loads than solid forming processes. In order to produce semi-solid materials of the desired microstructure, a stirring process is applied during solidification of molten metal. The results of an A356 aluminum alloy sample, which are obtained by experiment and by simulation using DEFORM 3D, are present.