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Brazing is widely used in the tool industry to fasten "hard metal" (carbide, ceramics, cermet, and similar) tips to tools such as saw blades. "Pretinning" is often done: the braze alloy is melted onto the hard metal tip, which is placed next to the steel and remelted.
Brazing and soldering can be carried out manually or by an automated technique. Manual aluminium brazing can be difficult as there is no observable colour change before melting. As with other techniques, aluminium's strong oxide can prevent proper bonding. Strong acids and bases can be used to weaken the oxide, or aggressive fluxes may be used ...
For most metals, incl. stainless steel and carbides. Highly recommended. Recommended for 300-series stainless steel. Good for food-handling applications with close joint tolerances. Gap 0.1–0.25 mm. Alloy specifically designed for brazing tungsten carbide tips to steel tools and wear parts. Readily wets nickel and iron alloys.
Induction brazing is a process in which two or more materials are joined together by a filler metal that has a lower melting point than the base materials using induction heating. In induction heating, usually ferrous materials are heated rapidly from the electromagnetic field that is created by the alternating current from an induction coil .
Brazing has the advantage of producing less thermal stresses than welding, and brazed assemblies tend to be more ductile than weldments because alloying elements can not segregate and precipitate. Brazing techniques include, flame brazing, resistance brazing, furnace brazing, diffusion brazing, inductive brazing and vacuum brazing.
Flux-less techniques are therefore desirable there. [13] For successful soldering and brazing, the oxide layer has to be removed from both the surfaces of the materials and the surface of the filler metal preform; the exposed surfaces also have to be protected against oxidation during heating.
Automotive arc welding (aluminum) AWS D9.1: Sheet metal welding AWS D10.10: Heating practices for pipe and tube AWS D10.11: Root pass welding for pipe AWS D10.12: Pipe welding (mild steel) AWS D10.13: Tube brazing (copper) AWS D10.18: Pipe welding (stainless steel) AWS D11.2: Welding (cast iron) AWS D14.1: Industrial mill crane welding AWS D14.3
Diffusion bonding is primarily used to create intricate forms for the electronics, aerospace, nuclear, and microfluidics industries. Since this form of bonding takes a considerable amount of time compared to other joining techniques such as explosion welding, parts are made in small quantities, and often fabrication is mostly automated. However ...
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