Filler metal

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

Brazing fin material for heat exchangers, heat exchanger, and method of manufacturing same

Abstract: A brazing fin material for heat exchangers includes a core material and a filler metal clad on each side of the core material, wherein the core material is an aluminum alloy including manganese, the filler metal is an aluminum alloy including 6 to 9.5 mass % of silicon, silicon particles in the filler metal have an average circle equivalent diameter of 3 μm or less, and the brazing fin material has a thickness of 0.06 mm or less.

Production of aluminum heat exchanger

Abstract: PURPOSE:To prevent the buckling of corrugated Al fins owing to the use of the thin-walled fins and to reduce the weight of a heat exchanger by coating an Al alloy brazing filler meal consisting of a limited compsn. to the surface of an extruded multi-hole Al tube having a limited m. p., combining the bare fins therewith and heating the assembly thereby brazing the same. CONSTITUTION:The Al alloy brazing filler metal 3 contg., by weight, 6-13% Si, contg. 0.01-1.0% Bi or 0.01-1.0% Bi and =63.5 deg.C m. p. The bare corrugated fins consisting of the Al or Al alloy without being coated with the Al alloy brazing filler metal is then combined therewith and a flux is coated to the joint parts between the tube 1 and the fins 2. The assembly is heated to the melting temp. of the brazing filler metal in an inert gaseous atmosphere and is thus brazed. The reason for limiting the m. p. lies in that hot dipping is made easy. The reason for limiting the compsn. of the brazing filler metal lies in that the hot dipping of the brazing filler metal and the brazing of the tube and the fins are made easy.

Single-pass laser beam welding of clad steel plate

Abstract: The possibility of laser beam welding (LBW) clad steel plates in one pass with a single filler metal was investigated. Two procedures, one with a single-side laser beam and the other with a dual-beam laser, were utilized for butt-joint welding of carbon steel plates clad with austenitic stainless steel. Filler metal was in the form of strips, interposed within edges prior to welding. Metallographic observations and X-ray energy dispersive spectroscopy microanalysis were performed on welded specimens. Mechanical properties were evaluated by Vickers microhardness and tensile tests. These investigations have shown the possibility of making sound welds with a satisfactory composition and crack-free weld metal with both experimental procedures.

Study on the microstructure, mechanical properties and corrosion behaviour of S355JR/316L dissimilar welded joint prepared by gas tungsten arc welding multi-pass welding process

Abstract: In this study, the joints of dissimilar materials between S355JR carbon steel and 316L stainless steel were welded by gas tungsten arc welding (GTAW) multi-pass welding process. Characterisations of microstructure, mechanical properties and corrosion behaviours of dissimilar joint were investigated. The experimental results reveal that the microstructure of weld metal (WM) is austenite and vermiform δ-ferrite, and they cross-distribute in the weld seam. Moreover, there is a decarburisation layer on the interface of S355JR/WM, but the detrimental phase σ and M23C6 (chromium carbide) are not observed in the WM through X-ray diffraction. The fracture of the S355JR/316L welded joints always occurs in the S355JR heat affected zone during tensile test. Mechanical properties of the welded joints prepared by GTAW can meet the requirements of engineering application. The electrochemical corrosion test is also indicates that the corrosion resistance of WM decreases compared with the 316L base material. The corrosio...