Topic
Filler metal
About: Filler metal is a research topic. Over the lifetime, 11152 publications have been published within this topic receiving 86590 citations.
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09 Apr 1985
TL;DR: In this paper, the top end of a filler metal is brought into contact with the material to be welded and electricity is conducted between the filler metal and the material for heating via a power feed tip.
Abstract: PURPOSE:To obtain a stable and good weld bead while relieving the accuracy of a butt level by bringing the top end of a filler metal into contact with a material to be welded, conducting electricity to the power feed part of the filler metal and the material to be welded and executing laser welding while heating the filler metal. CONSTITUTION:A laser beam 1 is irradiated on the material 3 to be welded to form a through-beam hole 4 and while the filler metal 5 is supplied to the immediate underside of the beam 1 from the front of the irradiation point, the welding is executed. The top end part of the filler metal 5 is brought into contact with the material 3 to be welded and electricity is conducted between the filler metal 5 and the material 3 to be welded by a power supply 8 for heating via a power feed tip 6. The top end of the electrically heated filler metal 5 received the irradiation of the laser beam 1 and melts to a droplet which fills the level. The accuracy of the groove is thereby relieved and the stable and good weld bead is obtd.
32 citations
TL;DR: In this paper, the feasibility of joining aluminum alloy AA6061-T6 to galvanized boron steel by cold metal transfer (CMT) method using AA4043 filler metal was investigated.
Abstract: Along with the development of automobile industry for lightweight vehicles, more and more advanced and ultrahigh strength steels (e.g., hot stamping steel) have been used for automotive applications. Making use of the high strength steels not only reduces the vehicle weight and air emissions but also improves crash safety. Meanwhile, aluminum alloys are one of the lightest structural materials, and they have been widely used in automotive industry due to their many attractive properties such as low density, high specific strength along with good damping capacity. Since both hot stamping steel and aluminum alloys are being widely used for automotive applications, joining of hot stamping steel to aluminum alloys is inevitable. In this study, the feasibility of joining aluminum alloy AA6061-T6 to galvanized boron steel by cold metal transfer (CMT) method using AA4043 filler metal was investigated. The microstructures and chemical compositions of the welded lap joints were examined using scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDS), while the static strengths of the joints were measured. Test results showed that a sound weld-brazed joint which consisted of rich zinc zone, reaction interface zone, weld metal zone and fusion zone was formed. The phases and thickness of the reaction layers were analyzed and identified. In addition, the strength of CMT weld-brazed aluminum AA6061-T6 to galvanized boron steel depends on the torch deviation (i.e., distance between the welding torch and the edge of the weld seam). The joints fabricated with a deviation distance of 2 mm had greater strength than that of the joints made a deviation distance of 0 mm. Finally, the effect of temperature exposure of hot stamping on the weldability of CMT joining of joining aluminum AA6061-T6 to galvanized boron steel was investigated. It was found that the surface of galvanized boron steel was severely oxidized after heat treatment process and consequently reduced the weldability in CMT joining AA6061-T6 and galvanized boron steel.
32 citations
TL;DR: In this paper, the authors describe the selection of the proper welding method and welding consumables in dissimilar metal joining and compare the performance of SMAW and gas tungsten arc welding with two types of filler metals (ERNiCrMo-3 and ERSS316L) and an electrode.
Abstract: The current work was carried out to characterize welding of Inconel 625 superalloy and 316L stainless steel In the present study, shielded metal arc welding (SMAW) and gas tungsten arc welding (GTAW) with two types of filler metals (ERNiCrMo-3 and ERSS316L) and an electrode (ENiCrMo-3) were utilized This paper describes the selection of the proper welding method and welding consumables in dissimilar metal joining During solidification of ERNiCrMo-3 filler metal, Nb and Mo leave dendritic cores and are rejected to inter-dendritic regions However, ERSS316L filler metal has small amounts of elements with a high tendency for segregation So, occurrence of constitutional super-cooling for changing the solidification mode from cellular to dendritic or equiaxed is less probable Using GTAW with lower heat input results in higher cooling rate and finer microstructure and less Nb segregation The interface between weld metal and base metal and also unmixed zones was evaluated by scanning electron microscopy and energy dispersive X-ray (EDX) analysis Microhardness measurements, tensile test, and Charpy impact test were performed to see the effect of these parameters on mechanical properties of the joints
32 citations
TL;DR: In this article, three novel CuNi-Al brazing filler alloys with 4:1 and 2.5-10% Al were developed and characterized, and the wetting of three CuNi−Al alloys on WC-8Co cemented carbide were investigated at 1190-1210°C by the sessile drop technique.
32 citations