药芯焊丝的发展及其在船舶工业中的应用

药芯焊丝具有比手工焊条、实芯焊丝更多的优点,已在世界范围内成为一种最有发展前途的高效焊接材料。本文介绍了药芯焊丝的特点、分类以及美、苏、日和欧洲各工业国家生产和使用药芯焊丝的情况,着重介绍药芯焊丝在造船工业中,尤其是在焊接HY-80、HSLA-80和HY-100等高强度钢中的应用。     

管线钢用自保护药芯焊丝发展概况

自保护药芯焊丝焊接过程无需外加保护气体,焊接速度快,在输油管道等领域得到了广泛的应用。文章介绍了管线钢用自保护药芯焊丝国内外研究进展、自保护药芯焊丝冶金特点、典型的管线钢用焊接材料以及自保护药芯焊丝需要解决的问题。     

E501T1型药芯焊丝气孔问题及防止对策

以ES01T1型药芯焊丝为例，分析了药芯焊丝在船舶焊接中气孔和凹坑问题的影响因素，从材料选择、焊接工艺控制和改善现场气保护状态等方面提出防止对策，有助于药芯焊丝的正确应用，提高了船舶焊接质量。     

国外焊接材料的发展动态及加快国产药芯焊丝发展的建议

概要地介绍了国外焊接材料（ 主要是药芯焊丝） 的发展动态,对大力发展高效焊材、改进ＭＡＧ 焊材的工艺性能及力学性能方面的工作也作了介绍,并就如何加快国产药芯焊丝产业的发展提出了建议。     

金属粉芯型气体保护焊丝在管道焊接中的应用

金属粉芯型气体保护焊丝被评价为“代替实芯焊丝的焊接材料”，它既有渣量少的实心焊丝的长处又兼备高熔敷速度、电弧柔软、焊接工艺性能好等熔渣型药芯焊丝的优点，金属粉芯焊丝现已在我国各地长输管线工程施工中得到应用。     

含Mg药芯焊丝对SiCp/6061Al等离子弧原位焊接的影响

针对SiCp/6061Al基复合材料焊接接头中增强相颗粒发生偏聚,使接头强度降低的问题,采用不同Mg含量的药芯焊丝(合金元素Al-Ti-Mg)为填加材料,以氩氮混合气为离子气,对SiCp/6061Al基复合材料进行等离子弧原位合金化焊接,研究了该类药芯焊丝对焊接接头组织和性能的影响.研究表明,当焊丝中Mg含量达到15%...     

环境协调型焊接材料和药芯焊丝的环境评估

在材料的环境协调性与可持续发展的思想指导下,分析了各种焊接材料在生产和使用时对环境的影响,提出环境协调型焊接材料概念的具体含义以及药芯焊丝的环境协调评估(LCA),并对焊接材料的环境协调性评估提出了建议。     

高强度低合金钢的药芯电弧焊

手工电弧焊、埋弧焊,气保护钨极电弧焊和气保护金属极电弧焊工艺已广泛用于焊接高强度钢。近十年药芯焊丝研究的进展促使开发出某些用于焊接标准高强度钢以及较新型的高强度低合金(HLSA)钢的新型药芯焊丝。本文介绍了有关这些新型药芯焊丝的机械性能、焊缝金属扩散红量和所要求的焊接工艺等方面的技术资料。并将利用特定的焊接应用实例从经济角度讨论药芯电弧焊方法的优点。     

不锈钢药芯焊丝焊接电弧气氛的光谱分析

针对不锈钢药芯焊丝电弧气氛在线监测难以实现的问题,该文开展不同工艺条件下的焊接实验,采用光纤式数字光谱仪,采集不锈钢药芯焊丝气体保护焊的电弧辐射光谱信息,并对采集到的光谱信息进行标定、对比分析,获取其蕴含的电弧气氛信息,进而对其焊接过程的特点及其辐射变化规律进行研究。结果表明:该方法可对电弧气氛元素进行有效定性检测分析,为不锈钢药芯焊丝焊接电弧气氛的检测提供理论和实验基础。     

硬面药芯焊丝材料的新进展

综述了硬面药芯焊丝研究的最新进展,对硬面药芯焊丝材料进行了分类,探讨了硬面药芯焊丝硬面层金属的合金类型和显微组织,指出了未来研究的主要方向.     

Research on technology of automatic welding machine and procedure for pile pipes of offshore jacket platform

Because of the high requirement of quality, vile working environment and great difficulty of automatic welding, MMA is usually adopted for the welding of the platform jacket and the pile pipe all over the world, which is one of the choke points influencing construction with low efficiency and hard working. In this article, an up to date technology for platform pile pipes welding is introduced. Core with FCW-S and combining with the character and requirement of platform construction, the special automatic horizontal welding equipment and process are developed. Further more, the application off shore are introduced too.     

焊接工艺碳足迹分析及其工艺参数优化

以提高焊接工艺过程中资源和能源利用效率,减少碳排放为目的,从物料、能源、废弃物3个维度,对焊接加工过程碳排放机理加以分析.根据焊接及数学理论建立了焊接过程的碳排放特性函数.对回流焊接设备影响碳排放的因子进行分析,建立遗传算法优化模型,并找出了最优解.     

母材碳含量对异种钢焊接熔合区形态的影响

利用扫描电镜及能谱分析技术，系统地研究了相同焊接工艺条件下，母材碳含量对异种钢焊接熔合区形态的影响。结果发现随碳含量增加，熔合区中的类马氏体层消失，呈锯齿状的部分熔合区增宽。对其产生机理现进行了探讨，认为一般的焊接特征区划分方案不完全适用于异种钢焊接情况。     

碳对超低碳船体钢熔敷金属冲击韧性的影响

考察了埋弧焊材中含少量碳(w(C)<0.05%)对10CrNiCuA钢熔敷金属冲击韧性的影响。试验发现,随碳含量的增加,熔敷金属的冲击韧性得到了很大地提高。其主要原因在于,碳元素使熔敷金属的一次组织得到了明显地细化,并强烈地抑制了熔敷金属中侧板条铁素体的生成,使得熔敷金属中针状铁素体的含量稍有增加。     

Metallurgical and Corrosion Properties of Explosively Welded Ti6A14V/Low Carbon Steel Clad

1.IntroductionIn order to join metals preserving their propertiesand to join metals having different properties,solid-statewelding methods are used[1].Explosive welding is a solid-state process in which controlled explosion forces to jointwo or more materials together under high pressures[2~5].It is used to joint directly a wide variety of similar or dis-similar metals that cannot be joined by any other weld-ing or bonding technique[6~8].The parameters of thesystem include:(1)the explosive cha…     

Metallurgical and Corrosion Properties of Explosively Welded Ti6Al4V/Low Carbon Steel Clad

Titanium alloy (Ti6Al4V) and Iow carbon steel (LCS) were joined by explosive welding method using different ratios of explosive. Some metallurgical properties of joined samples were investigated. Joined samples were examined by means of optical microscope, scanning electron microscope (SEM) and tensile-shearing tests. Bending, tensile, hardness and corrosion behaviour of the samples were investigated. Separation was not occurred on the joining interface after tensile-shearing and bending tests. It is seen that hardness of both plates were increased with increasing explosive.It is found that increasing explosive ratio leads to an increase in corrosion. It is also found that corrosion rate was high at the beginning of the experiment but the rate of the corrosion decreased subsequently during the experiment.     

Improvement of Weld Quality Using a Weaving Beam in Laser Welding

This paper describes a way to improve the weld quality through suppressing the porosity formation and restraining the growth of columnar grains by using a weaving beam in laser welding. The experimental results show that the N2 porosity of beam-weaving laser welding low carbon steel can be remarkably reduced with increasing weaving frequency, and porosity can be eliminated when the weaving amplitude is only 0.5 mm; and the Ar porosity in the weld metal is decreased with increasing weaving frequency and amplitude when the welding speed is higher than 0.5 m/min. The beam-weaving laser welding of ultra-fine grained steel has been investigated. The experimental results show that beam-weaving laser welding with appropriate amplitude and frequency can partly restrain the growth of the columnar grain and improve the tensile strength of the weld metal.     

Q235与400MPa超级钢焊接热影响区晶粒尺寸的预测对比

应用有限元方法建立了低碳钢与超级钢焊接温度场数学模型,分别对5mm厚低碳钢板和超级钢板等离子焊温度场和热循环进行了模拟和时比分析;利用模拟得到的热影响区热循环曲线,根据晶粒长大动力学原理分别对其热影响区晶粒尺寸进行预测。预测结果表明,低碳钢热影响区晶粒尺寸远大于超级钢热影响区晶粒。     

低碳钢氩弧焊焊剂的研制

针对低碳钢研制了由卤化物、SiO2 ,TiO2 ,Cr2 O3 等组成的氩弧焊焊剂 ,分析了各种单一成份的活性剂对焊接熔深的影响规律。在此基础上对多组元活性剂进行研究 ,优选出合适的配方 ,按此配方制成的活性剂可以大幅度地增加低碳钢氩弧焊的熔深 ,可一次焊透 12mm厚的对接低碳钢钢板     

An Experimental Study of Resistance Welding of Carbon Fibre Fabric Reinforced Polyetherimide (CF Fabric/PEI) Composite Material

This paper presents an experimental investigation of resistance welding of carbon fibre fabric reinforced polyetherimide composites (CF fabric/PEI). The heating elements were made from a single CF fabric/PEI prepreg sheet with neat PEI films co-moulded to both surfaces. Welding was conducted on a welding area of 25 mm × 12 mm. The quality of the welded specimens was studied using a non-destructive evaluation technique (C-scan) as well as a mechanical test (lap shear strength). The relationships between input power, input energy, welding time and consolidation pressure were studied. Experimental results indicated that sufficient joining was obtained at a power level from 80 to 160 kW/m2, under an initial welding pressure of 0.15 to 0.40 MPa. The maximum lap shear strength achieved through resistance welding was equivalent to that of the compression moulded benchmark. The fracture surfaces of welded specimens showed mostly cohesive-failure or intralaminar failure. An optimum processing window is proposed for the resistance welding of CF fabric/PEI composite system.