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药芯焊丝的发展及其在船舶工业中的应用 总被引:1,自引:1,他引:0
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。 相似文献
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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。 相似文献
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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。 相似文献
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In the present study, gas metal arc welding and flux cored arc welding were applied on SA516 Gr70 carbon steel material. Two different hybrid passes were applied, wherein flux cored wire and solid wire were applied to root pass and filler pass one by one and vice versa. Besides, two more welds of similar electrode root pass and filler pass of flux cored arc welding and gas metal arc welding were acquired. The comparative analysis was carried out in terms of macrostructure and microstructure examination, tensile testing, hardness variations, and impact testing for these classical welds and hybrid welds. The results reveal that, hybrid welds lead to better impact properties relative to classical welds. Maximum angular distortion of 2.66° was reported with classical weld of gas metal arc welding with solid wire root pass and same filler pass. The maximum impact toughness of 49 J/m3 was reported for flux cored root pass and solid wire filler pass at the weld zone. Maximum tensile strength of 596 MPa was reported for hybrid weld of solid root pass and flux cored filler pass. Microstructures are reported with the presence of different acicular ferrite and grain boundary ferrite. Maximum acicular ferrite of 61% was reported with classical weld of flux cored arc welding. 相似文献
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Pritesh Prajapati 《Materials and Manufacturing Processes》2018,33(3):315-322
In the present investigation, multi-pass gas metal arc welding (GMAW) of SA516 Gr70 carbon steel was carried out by different filler wires such as solid, metal cored and flux cored, wherein, other process parameters were kept constant. The hybrid approach of multi-pass filler wires was applied to obtain three different welds. The root pass was filled by a solid wire for all three cases while the subsequent filler pass was applied through solid, flux-cored and metal cored filler wires, respectively. Metallographic, mechanical and metallurgical analyses such as macrograph study, optical microscopy, tensile testing and hardness variations were performed to address the quality of weld. The results revealed that defect-free sound welds were produced by the hybrid approach of different filler wires in multi-pass GMAW. Overall cost and time reduction can be achieved through hybrid filler welds, without affecting their mechanical strength. Angular distortion was reported minimum at hybrid weld of solid and metal cored filler wire. Maximum reinforcement with higher penetration was observed at weld of solid and metal cored filler wire. Impact toughness was reported higher in case of hybrid weld of solid and flux cored filler wire. Higher macro hardness was reported at weld of solid and flux cored filler wire. 相似文献
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研究了一种GDQA347L型含铌不锈钢药芯焊丝。并对工艺性能的影响因素进行了分析。结果表明,GDQA347L型焯丝焊接工艺性能优良,力学性能和耐腐蚀性能满足要求;合适的脱氧剂比例有利于工艺性能的改善。 相似文献
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In this paper the influence of heat input and preheat temperature on the critical implant stress was analyzed for the weld metal of API 5L X80. High strength steel marked as API 5L X80 is produced with a thermo – mechanical controlled process (TMCP), its chemical composition shows low carbon content due to which the steel has good weldability, but in the weld metal zone cold cracking can occure. The goal of this paper is to define optimal work conditions in form of flux cored arc welding (FCAW) welding parameters at which no cold cracks can be found. The experiment was conducted using central composite design (CCD) and design of experiments (DoE) with two independent variables (preheat temperature and heat input). Mathematical models were developed for all three different wire types that were used (two rutile, one basic flux cored wire). The samples in this paper which had cold cracks were further analyzed on the scanning electron microscope (SEM). 相似文献
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探究了不同焊接工艺对3 mm船用高强钢薄板焊接成形质量的影响.结果表明:3 mm对接试板经不同方法焊接后均呈马鞍形变化.焊条电弧焊和手工气保焊焊接的试板变形严重,且两者变形量和残余应力基本相当,药芯焊丝CMT(cold metal transfer)自动焊接试板的焊缝内部存在夹渣缺陷.利用实心焊丝CMT自动焊接试板的焊缝均匀、内部无缺陷,焊缝中心残余应力明显降低,其变形量平均值比焊条电弧焊减小37.8%,且线能量仅为焊条电弧焊的22.4%.焊接试板变形量与其线能量大小的变化趋势一致. 相似文献
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目的针对传统钢材硬度低、不耐磨损的问题,选用WC颗粒来增强传统钢材性能,研究不同工艺对WC颗粒增强钢基材料的影响。方法采用埋弧焊方法,将含有WC颗粒的药芯焊丝在钢板表面进行堆焊,采用SVS3020显微镜、光学显微镜和显微硬度计对焊缝的显微组织进行观察与分析。结果随着焊接电流、电压的增大,焊缝成形逐渐完好,无焊缝缺陷,焊接速度增大,焊缝有夹渣缺陷产生;焊缝硬度随着电流、速度的提升而增大,但随电压的提升而下降。结论埋弧焊焊接选用350 A电流、32 V电压和20 m/s速度成形的焊缝质量最佳,基体的稀释作用对堆焊合金层的显微硬度也有明显影响。 相似文献
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In this present work, the influence of different consumables on weld properties of carbon steel plate was studied by automatic gas metal arc welding under constant voltage mode. For all experiments, the process parameters such as welding current of 200 A, voltage of 28 V and welding speed of 200 mm/min were kept constant. The results indicate that the angular distortion remained higher for solid wire, whereas it was minimum for flux-cored wire and the lowest in metal-cored wire. Mechanical properties such as yield strength, tensile strength, elongation and joint efficiency remained high for solid wire relative to cored wire. Excellent impact toughness of the weld metal and heat-affected zone was reported for the flux-cored welds compared with solid wire and metal-cored welds. 相似文献