2,808
edits
Changes
→Brazed Semi-Finished Contact Materials (Toplay–Profiles)
=== Brazed Semi-Finished Contact Materials (Toplay–Profiles)===
The toplay process starts with a flat or profile – shaped contact material stripwhich is fed together with the wider non-precious carrier material and in mostcases an intermediate thin foil of brazing alloy into a induction brazing machine''<xr id="fig:Toplay brazing with an inductive heating inline equipment (schematic)"/> (Fig. 3.5)''. An evenly distributed and reliable braze joint can be achieved this waybetween contact and carrier materials. The combined material strip is rather softafter the brazing process and re-hardened during a subsequent profile rollingstep. In this way different shapes and configurations can easily be achieved. Fig. 3.5: Toplay brazing with an inductive heating inline equipment (schematic)
<figure id="fig:Toplay brazing with an inductive heating inline equipment (schematic)">
[[File:Toplay brazing with an inductive heating inline equipment (schematic).jpg|right|thumb|Toplay brazing with an inductive heating inline equipment (schematic)]]
</figure>
*Typical configurations of toplay contact profilesbild(<xr id="fig:Typical configurations of toplay contact profiles2"/>)
<figure id="fig:Typical configurations of toplay contact profiles2">
[[File:Typical configurations of toplay contact profiles2.jpg|right|thumb|Typical configurations of toplay contact profiles]]
</figure>
*Contact materials <br />Ag, AgNi 0,15 (ARGODUR), AgCu, AgCuNi (ARGODUR 27), Ag/Ni (SINIDUR),
Ag/CdO (DODURIT CdO), Ag/SnO<sub>2</sub> (SISTADOX), Ag/ZnO (DODURIT ZnO)<br />
*Carrier materials <br />Cu, CuZn, CuSn et al.<br />
*Quality criteria, dimensions and tolerancesbild(<xr id="fig:Quality criteria dimensions and tolerances"/>)
<figure id="fig:Quality criteria dimensions and tolerances">
[[File:Quality criteria dimensions and tolerances.jpg|right|thumb|Quality criteria dimensions and tolerances]]
</figure>Strength properties and dimensional tolerances of toplay profiles are derivedfrom the standards DIN EN 1652 and DIN EN 1654 for Cu alloys.
=== Seam–Welded Contact Strip Materials (FDR–Profiles)===
