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When selecting the brazing material, the main consideration is the characteristics of the base material and the requirements for the joint performance. In general, the following factors should be taken into account.
1. The brazing material should have a suitable melting temperature range, at least a few tens of degrees lower than the melting temperature range of the base material.
2. It should have good wettability at brazing temperature to ensure full filling of the brazing gap.
3. The brazing material should have a diffusion effect with the base material in order to form a strong bond.
4. The brazing material should have a stable and uniform composition to minimize the loss of alloying elements during the brazing process.
5. The brazed joint obtained should meet the technical requirements of the product and satisfy the requirements of mechanical properties, physical and chemical properties and use properties.
6. The economy of brazing material should be good. It should contain as little or no rare metals and precious metals as possible. It should also ensure that the productivity of brazing is high.
7. Brazing material should have the ability to process deformation, so that it can be made into various shapes.
