钢内筒钛钢复合板焊接工艺特点

简要介绍了镇江电厂三期工程钢内筒钛钢复合板焊接工艺，及钛钢复合板焊接质量控制要点。     

钛/铝复合板爆炸焊接技术研究进展

通过爆炸焊接技术制备的钛/铝复合板可兼具钛合金耐腐蚀性和铝合金低成本的优点。对钛/铝复合板爆炸焊接技术的研究进展进行介绍,论述了炸药种类、质量比R、基覆板间距及爆炸焊接窗口等主要工艺参数对钛/铝复合板组织和性能的影响;分析了影响钛/铝复合板结合界面的主要因素——金属间化合物种类、扩散层和界面波形;对钛/铝复合板硬度、抗剪切强度、抗拉强度及拉伸断口的研究进行了汇总分析。最后,指出了钛/铝复合板爆炸焊接工艺研究的重点发展方向。     

0Cr18Ni9不锈钢复合板复层缺陷修复技术

通过不同的手工电弧焊焊接工艺修补不锈钢复合板复层缺陷,并对修复的复合板进行化学成分、力学性能、显微硬度、金相组织、能谱等检测分析,结果表明,过渡层用309焊条、复层用308焊条、分两层修补的焊接工艺二修复的缺陷区,其力学性能及耐腐蚀性能满足复合板母材性能要求。     

N4/1Cr18Ni9Ti复合板焊接研究与应用

针对N4/1Cr18Ni9Ti复合板的特殊使用要求,通过采用手工钨极氩弧焊打底、熔化极气体保护焊焊接基层,手工钨极氩弧焊焊接复层的焊接工艺,完成了冶炼坩埚的焊接制造,提高了焊接生产率,降低了成本,具有很大的推广价值。     

真空轧制825合金/X65钢复合板的组织性能

 针对油气输送领域对耐H2S腐蚀油气复合管线的需求,采用真空轧制复合技术成功制备出825镍基合金/X65高强管线钢复合板。真空轧制复合技术是基于真空电子束焊接和热轧复合所开发出的一种新型复合技术,在高真空、高温和强塑性变形条件下,复合界面实现优异的冶金结合。采用X65/825合金/825合金/X65的4层对称复合轧制模式,并对复合界面的微观组织和力学性能特征进行分析。研究表明,复合界面连续平直,无孔洞和裂纹等缺陷,镍、铬和铁元素在界面两侧发生明显的扩散,另外复合界面生成一条连续的厚度约为1 μm的TiC薄带,在结合界面离散分布少量的颗粒状Al2O3化合物。界面平均剪切强度为404 MPa,拉剪断裂在复合界面处。     

不锈钢复合板氨水储罐的焊接

分析了Q235 304不锈钢复合板的焊接性。对复合材料的焊接工艺进行了评定试验。确定了基层和复层分别焊接、不添加过渡层的焊接工艺。施焊过程中通过严格执行工艺规范，既保证了焊接质量又提高了焊接效率．设备运行检验结果表明。焊接工艺合理，焊接质量满足设计要求。     

Gas metal arc welding of duplex stainless clad steel plates

The 2205 duplex stainless + DH36 clad steel plate was welded by gas metal arc welding (GMAW),and the welding performance of the clad steel plate was investigated.The results show that the adaptability of the welding procedure for the base metal of carbon steel,the transition layer,and the cladding material is excellent.The test results indicate that the phase proportion and component dilution of the GMAW-welded joints of clad steel plate can be effectively controlled to yield joints with good mechanical properties and corrosion resistance.     

不锈钢复合钢板焊接裂纹研究

结合金相检验、理化试验,利用舍夫勒图对复合板焊接经常出现裂纹的问题进行原因分析。结果表明,过渡层有马氏体组织的生成和异种铜接头的热应力是产生焊接裂纹的主要原因,减小熔合比是防止裂纹产生的关键。     

焊接材料对双金属复合板焊接接头性能的影响

为研究焊接材料对Q235B/304双金属复合板焊后性能的影响,采用手工焊条电弧焊方法焊接 Q235B/304双金属复合板,焊接材料分别为THNi317焊条和THA062焊条。利用光学显微镜及EDS（X射线能谱仪）分析了焊接接头金相组织和合金元素在熔合线两侧的分布情况,并进行了焊接接头力学性能试验。结果表明,两种焊条的焊缝组织主要均为奥氏体γ和少量δ铁素体。THNi317焊接材料可以更加有效控制碳元素扩散以及铬和镍合金元素稀释。采用两种焊条获得的焊接接头抗拉强度和硬度均满足标准要求,但是采用THNi317焊条获得的焊缝和热影响区比采用THA062焊条获得的焊缝和热影响区具有更好的冲击韧性。     

焊接参数对Gr1钛板焊缝组织和性能的影响

Gr1钛板是爆炸法制金属复合板常用材料,大幅Gr1板常需进行拼焊处理。为了使拼焊后的Gr1钛板的塑性指标能够满足后续爆炸复合工艺的要求,选择不同焊接参数和送丝方式对5.5 mm厚的Gr1钛板进行拼焊,通过金相、硬度、拉伸、弯曲等对比分析,研究不同工艺参数对其焊缝组织和力学性能的影响。结果表明,Gr1板在I=90A,U=10 V,v=4.8 mm/s,不添加焊丝的自熔方式下拼焊,可以在焊缝处获得大片细小的α态晶粒组织和较好的综合力学性能,在该工艺下拼焊的Gr1钛板满足爆炸复合用钛板的使用要求。     

锆钢复合板制备水解釜技术探讨

探讨了选用锆钢复合板制备水解釜的技术问题。通过采用一系列措施,成功解决了锆材在250℃的15%硫酸介质中的耐腐蚀问题,使设备的安全性和可靠性得到保障。实践证明,水解釜选用锆钢复合板是完全可行的。     

爆炸焊接与金属材料的保护

用爆炸焊接技术生产的许多带有耐蚀复层的金属复合材料，能够卓有成效地解决生产和科学技术中大量的金属材料的保护问题。以大量实例综述了爆炸焊接和爆炸复合材料在金属材料保护中的应用。     

覆合板焊接机的研制

简述覆合板焊接机在焊接工艺、现场环境、资金等方面的研制难点,介绍设备框架组成及主要工艺参数,重点介绍覆合板焊接机焊接板片及铸锭的生产过程,并就覆合板的包铝层、板型、表面质量、产量、生产效率、节约能耗、设备利用率等从技术和生产两方面分析了应用效果。     

Phase transformations at steel/IN626 clad interfaces

The microstructures of 4130 and 2.25Cr-1Mo steels clad to nickel base IN625 by welding and HIPing were examined by Analytical Electron Microscopy (AEM) and Secondary Ion Mass Spectroscopy (SIMS) to determine the interfacial microstructural characteristics which could affect their mechanical properties and corrosion resistance. The interface microstructures of the clads produced by the two methods were considerably different. The clad produced by welding was characterized by a low density of carbide precipitates confined to a very narrow region (∼1 μm) at the interface of ferrite and austenite. In addition, a thin region of untempered martensite was present at the interface which could affect its resistance to hydrogen embrittlement as well as other mechanical properties. The interface of the HIP clad composite contained several regions of distinct microstructural characteristics with widely varying densities of carbide precipitates. Relative to the clad produced by welding, extensive precipitation was observed both in the steel and in the IN625 at the interface, separated by a region free from precipitation. The extent of precipitation at the interface regions appears to be controlled essentially by the extent of carbon transport across the interface. The article describes the detailed analysis of the interface characteristics, and models are proposed to explain the microstructural evolution at the interface of the HIP and weld clad composites.     

爆炸复合15Cr—MoR＋不锈钢复合钢板研制及生产

作者根据石化行业临氢状态容器设备所需15CrMoR 不锈钢复合钢板,进行了试验研制,并认为,热处理对复合钢板综合性能产生重要影响.复合钢板经焊接工艺评定和抗氢剥离试验证明,该产品具有优良可靠的制造和使用性能.     

等离子弧技术在锆钢复合板焊接中的应用

采用等离子弧焊＋自动氩弧焊＋埋弧焊的方法焊接锆钢复合板基层,不仅能够满足压力容器制造要求,而且能够保证复合板的焊后质量。     

镍-不锈钢爆炸+轧制复合板

讨论镍－不锈钢爆炸＋轧制复合板在不同工艺下退火下后的成分,组织和性能,在本试验的条件下,该复合板都有良好的结果,由此可以根据消除应力和再结晶的需要,或者为了获得综合的物理和化学性能的需要而选用不同的退火工艺,同时指出,镍－不锈钢复合板在高温下退火的表现,为相图理论在爆炸焊接中的应用提供了范例。     

爆炸焊接双面复合不锈钢管板的工艺研究

介绍了爆炸焊接复合板生产工艺及其在制造特厚双面复合不锈钢管板上的应用，实践表明，该方法比堆焊法具有加工成本低、管板性能优、耐腐蚀性能好的特点。     

钛钢复合板的组织与结合界面研究

进行了TA1/Q235的累积叠轧焊试验,研究了TA1/Q235复合板结合界面组织和Ti,Fe元素的扩散情况.研究结果表明:在实际轧制中要严格控制夹杂的含量,并要采用低温大变形加工、低温累积叠轧的钢-钢结合完全接近基体组织,TA1/Q235的结合机制为裂口结合机制,Ti元素比Fe元素扩散强烈.     

Direct-Chill Co-Casting of AA3003/AA4045 Aluminum Ingots via Fusion™ Technology

Laboratory-scale experiments were conducted to cast AA3003/AA4045 clad ingots via Fusion? Technology, a novel process developed by Novelis Inc. for the production of aluminum clad materials such as brazing sheet. Experimental results were used to validate a steady-state thermofluids model of the Fusion? Technology co-casting process. The numerical model was able to accurately predict the temperature field within the AA3003/AA4045 clad ingot as well as the shape of the AA3003 liquid sump. The model was also used to quantify the temperature, fraction solid, and velocity fields in a clad ingot cast with an asymmetrical molten metal-feeding system. Feeding of core and clad molten metals at opposite corners of the mold was found to reduce the risks of hot spots and liquid metal breakthrough from the core sump to the clad side of the Fusion? Technology mold. The use of a diffuser for the AA3003 core molten metal and of a vertical feeding tube for the AA4045 clad produced different flow patterns and liquid sump shapes on either side of the mold. The quality of the metallurgical bond at the core/clad interface appeared good near the clad inlet and at the ingot centerline, but poor near the edges of the ingot. SEM–EDS analysis of the chemical composition across the interface showed that a 1 to 20-μm-deep penetration of silicon from the AA4045 clad into the AA3003 core had occurred at visually acceptable interfaces, whereas silicon diffusion across poor interfaces was very limited. A study of the model-predicted fraction solid history at different points along the interface indicated that reheating of the AA3003 core is not required to form a visually acceptable metallurgical bond. However, a sufficient amount of interaction time between the solid AA3003 core shell and the silicon-rich AA4045 clad liquid is required to chemically dissolve the surface of the core and form a good metallurgical bond. An approximate dissolution depth of 750 to 1000 μm was observed along the visually good interface. Partial dissolution of the Mn-rich AA3003 core led to the formation of Al(Mn,Fe)Si intermetallic particles in the AA4045 clad and an increased manganese concentration near the core/clad interface.