Filler metal

About: Filler metal is a research topic. Over the lifetime, 11152 publications have been published within this topic receiving 86590 citations.

Effect of shielding gas on welding performance and properties of duplex and superduplex stainless steel welds

Abstract: The influence of shielding gases on welding performance and on properties of duplex and superduplex stainless steel welds was studied Using argon as the reference gas, helium, nitrogen and carbon dioxide were added and five mixtures evaluated Bead-on-plate welds and circumferential pipe welds were produced using mechanised GMA welding in the downhand position Welding performance, corrosion resistance, mechanical properties, microstructural features and weld imperfections were assessed and related to the shielding gas Shielding gases containing 30 % helium showed excellent results; whilst pure argon showed unstable arc and poor weld pool fluidity and Ar + 2 %CO2 resulted in underfill and porosity Mixtures containing helium resulted in higher ductility welds and higher impact toughness values than welds produced with Ar + 2 %CO2 Sound and balanced duplex microstructures free from intermetallics were found with suitable ferrite contents for all the shielding gases studied All the duplex pipe welds passed the corrosion test regardless of the shielding gas used, and the best results in the corrosion test for superduplex pipe welds were found when using Ar + 30 %He + 05 %CO2 + 18 %N2 as shielding gas

Welding Characteristics of Aluminum and Copper Plate Specimens Welded by a 19 kHz Complex Vibration Ultrasonic Seam Welding System

Abstract: The welding characteristics of aluminum and copper plate specimens welded using a 19 kHz ultrasonic welding system with a complex-vibration welding tip were studied. The welding tip part vibrates in an elliptical or circular locus. The seam welding system uses a rotating circular disk welding tip and a shifting stage for continuous welding of the metal sheets. Using the complex-vibration system, metal plates of various thicknesses can be welded continuously at multiple positions with large and uniform welded areas and large weld strengths independently of the welding position and direction. The required complex-vibration amplitude is less than one-half of that of a conventional linear-vibration system. Aluminum-aluminum, aluminum-copper and copper-copper plate specimens were welded with weld strengths almost equal to the specimen strength.

Article made by joining two members together, and a brazing filler metal

Abstract: In an article, a binding layer formed through a heating step exists between a permanent magnet and a laminate of steel plates. The binding layer is formed by producing a liquid phase at the heating step from a brazing filler metal made of a rare earth element-based alloy. Diffusion areas exist between a body portion of the permanent magnet and a body portion of the binding layer and between a body portion of the laminate and the body portion of the binding layer, respectively. The thickness t of each of the diffusion areas is in a range of t≧5 μm. The bond strength in the article is greatly increased by the provision of the diffusion areas.