共查询到20条相似文献,搜索用时 187 毫秒
1.
金属粉型药芯焊丝以其优良的焊接工艺性能和高的焊接效率,在国外发达国家得到了广泛的应用。其归属问题在国际上并不统一,AWS将其归于实心焊丝标准中,而ISO、EN和JIS将其归于药芯焊丝标准中,中国在2008年新修订的低合金钢药芯焊丝中,将低合金钢用金属粉型药芯焊丝归于此类。文中介绍了国外知名焊接材料生产厂家生产的金属粉型药芯焊丝品种,并详细介绍了日本神钢的金属粉型药芯焊丝。 相似文献
2.
3.
4.
本文概述了药芯焊丝和金属粉芯焊丝电弧焊的发展历程,全面分析了这两种焊接工艺方法的优点,详细论述了药芯焊丝、金属粉芯焊丝制造技术、品种、性能、质量和相关标准的新发展,列举了药芯焊丝和金属粉芯焊丝电弧焊典型应用实例。 相似文献
5.
本文概述了药芯焊丝和金属粉芯焊丝电弧焊的发展历程,全面分析了这两种焊接工艺方法的优点,详细论述了药芯焊丝、金属粉芯焊丝制造技术、品种、性能、质量和相关标准的新发展,列举了药芯焊丝和金属粉芯焊丝电弧焊典型应用实例。 相似文献
6.
本文概述了药芯焊丝和金属粉芯焊丝电弧焊的发展历程,全面分析了这两种焊接工艺方法的优点,详细论述了药芯焊丝、金属粉芯焊丝制造技术、品种、性能、质量和相关标准的新发展,列举了药芯焊丝和金属粉芯焊丝电弧焊典型应用实例。 相似文献
7.
本文概述了药芯焊丝和金属粉芯焊丝电弧焊的发展历程,全面分析了这两种焊接工艺方法的优点,详细论述了药芯焊丝、金属粉芯焊丝制造技术、品种、性能、质量和相关标准的新发展,列举了药芯焊丝和金属粉芯焊丝电弧焊典型应用实例。 相似文献
8.
本文概述了药芯焊丝和金属粉芯焊丝电弧焊的发展历程,全面分析了这两种焊接工艺方法的优点,详细论述了药芯焊丝、金属粉芯焊丝制造技术、品种、性能、质量和相关标准的新发展,列举了药芯焊丝和金属粉芯焊丝电弧焊典型应用实例。 相似文献
9.
10.
11.
随着社会技术进步和人类对石油和天然气需求量的急剧增加,长输管道在向着大口径、长距离、高压力、高钢级方向发展,焊接技术及相关的设备、材料性能也在同步提高,与之相适应的管道焊接技术也在发生着巨大的变化。管材钢级从X42提高到X80;焊接材料从纤维素焊条到自保护药芯、金属粉芯、实心等各种焊丝;焊接方法从手工上向焊到手工下向焊,到药芯自保护半自动焊,再到气保护半自动焊、自动焊,管道焊接技术日趋成熟。结合长输管道施工特点,在分析国内外管道焊接技术差异的基础上,提出我国现阶段长输管道焊接技术发展的建议。 相似文献
12.
针对焊接快速成形耐磨功能零部件的需求,采用Nb-Ti-V微合金化的方法制备了一种低碳Fe基金属芯焊丝作为焊接成形材料,采用基于熔化极气体保护焊的焊接快速成形技术制备堆焊层试样,对其显微组织和性能进行了研究.显微组织分析表明:堆焊层金属无气孔和裂纹缺陷,主要组织是铁素体和板条马氏体,沿堆积高度方向上,马氏体的板条由粗大变为细小.堆焊层的硬度测试表明:显微硬度平均值为422.7 HV,具有一定的机加工性.干摩擦磨损试验表明:堆焊层的耐磨性是45钢的2.41倍. 相似文献
13.
通过选择钛碱性渣系和Mn-Si-Ni-Ti-B合金系,在德国进口无缝药芯焊丝生产线上,制成了一种超低氢高韧性的无缝药芯焊丝TME711NiSF. 其焊接工艺性能和力学性能优良,对焊接热输入具有良好的适应性. 为探讨熔敷金属的韧化机理,对配方中的脱氧剂和合金剂含量进行了优化设计. 结果表明,Mn和Si元素含量居于优化水平时,焊缝组织主要是均匀细小的针状铁素体,这种组织的塑性和低温韧性高,熔敷金属在温度-40 ℃冲击吸收功可达到154 J. 该无缝药芯焊丝熔敷金属的扩散氢含量为2.4 mL/100 g,达到了超低氢水平,适用于船舶、桥梁、海洋工程等重要结构的焊接. 相似文献
14.
《Science & Technology of Welding & Joining》2013,18(3):139-148
AbstractFive experimental basic type flux cored arc welding consumable wire electrodes were manufactured from the same base formulation. The composition of these electrodes was adjusted in an attempt to improve the operating performance. This involved additions of various ratios of alkali oxides, namely, lithium, magnesium, sodium, and potassium containing ingredients, in the flux formulations. The operating behaviours of these experimental electrodes and two reference products (i.e. one commercial basic T–5 and one commercial rutile T–1 electrode) were thoroughly investigated by recording welding arc signals using a high speed data acquisition system. By comparing these electrodes among themselves, the experimental electrodes were reported to exhibit extremely stable arcs, some showing electrical arc signals even smoother than those for the reference rutile grade electrode. Despite their improved metal transfer consistency, however, basic electrodes were characterised by somewhat higher spatter levels. 相似文献
15.
分析了直径为1.2mm的490MPa氧化钛型CO_2气体保护药芯焊丝药芯粉填充的均匀性,测量了药芯率大小,对药芯粉中磁性与非磁性物质进行了分离,并测定了药芯粉所含元素和组成物相。此外,还进行了药芯焊丝的操作性能,焊缝金属力学性能试验。结果表明:氧化钛型CO_2气体保护药芯焊丝具有良好的焊接工艺性能和焊缝金属有很高的韧性。 相似文献
16.
17.
Cicero Murta Diniz Starling Paulo José Modenesi Tadeu Messias Donizete Borba 《Welding International》2013,27(8):579-592
The aim of this work was to make a comparative study of the characteristics of the weld bead produced by nationally manufactured tubular wires; all rutilic (ASME SFA-5.20: E71T-1/E71T-9/E71T-9M), basic (ASME SFA-5.20: E71T-5/E71T-5M) and ‘metal cored’ (ASME SFA-5.18: E70C-3M), 1.2 mm in diameter, intended for the welding of structural steels with low and medium levels of carbon. Welding tests were carried out, in the flat position, on thick plates (with a thickness of 12 mm) of common low-carbon steel using a source operating in ‘constant voltage’ mode, with monitoring of the current and voltage signals of the arc and feed speed (fusion) of the wire. The following were varied in welding with each type of tubular wire: the composition of the shielding gas (75%Ar–25%CO2 and 100%CO2) and the feed speed of the wire (7 and 9 m/min). The other parameters were kept fixed, including the polarity of the electrode (DC+) and the energized lengths of the electrode (16 mm) and of the arcs (3.5 mm). For the different tubular wires, there was a comparative analysis of the principal weld bead characteristics, including its geometry (penetration, reinforcement, width, fused area, deposited area and dilution), presence of weld discontinuities, microstructure and hardness. Operational conditions that yielded weld bead characteristics that favoured the welding of thick plates of structural steels were determined. 相似文献
18.
19.
介绍了用药焊丝CO2焊焊接16MnR/SUS321不锈钢合钢板压力容器的焊接工艺试验及焊接工艺评定,通过检查焊缝的化学成分,硬度,金相组织,测定接头的力学性能,晶间腐蚀试验等,证明药芯焊丝CO2焊用于不锈复合钢压力容器制造是可行的,对不锈复合压力容器的焊接要点进行了简要说明。 相似文献
20.
Investigation on mechanism of fixing nitrogen in self-shielded flux cored arc welding 总被引:1,自引:0,他引:1
Prevention of nitrogen porosity in weld metal deposited with self-shielded flux cored wire with CaF_2-TiO_2-MgO slag system can be accomplished by using a "killing agent" such as titanium to react with nitrogen dissolved in the weld metal. The amount of titanium needed to prevent porosity is calculated thermodynamically for various dissolved nitrogen levels. Experimental flux cored wires are used to verify the thermodynamic model. It is concluded that approximately O.11 wt% titanium in the weld deposit is need to prevent nitrogen porosity when welding without externally applied shielding. 相似文献