Commonly used materials in brazing include aluminium-silicon alloys, silver-based alloys, copper-based alloys, nickel-based alloys, cobalt-based alloys, titanium-based alloys, gold-based alloys, palladium-based alloys, and amorphous brazing materials. Each of these materials has specific properties and applications that make them suitable for different brazing processes and environments.
Aluminium-Silicon Alloys: These are widely used in aluminium alloy brazing due to their good wettability, fluidity, and corrosion resistance. They are particularly favored in the aviation and aerospace industries where lightweight and high strength are crucial.
Silver-Based Alloys: Silver-based brazing materials offer low melting points and excellent wetting and caulking performance. They are versatile and can be used to braze almost all ferrous and non-ferrous metals, making them suitable for a wide range of applications including electronics and aerospace.
Copper-Based Alloys: Copper-based brazing materials are known for their good electrical and thermal conductivity, strength, and corrosion resistance. They are commonly used in brazing copper and copper alloys, as well as carbon steel, cast iron, stainless steel, and high-temperature alloys.
Nickel-Based Alloys: Nickel-based brazing materials are particularly effective for brazing parts that operate under high temperatures or in corrosive environments. They are widely used in aerospace and electronics due to their excellent resistance to high temperatures and corrosion.
Cobalt-Based Alloys: Cobalt-based brazing materials are typically used for brazing cobalt-based alloys and offer excellent high-temperature performance. The addition of elements like silicon and tungsten enhances their melting temperature and high-temperature properties.
Titanium-Based Alloys: Titanium-based brazing materials are active metals with high specific strength and excellent corrosion resistance. They are used in vacuum brazing and diffusion brazing for a variety of materials including titanium alloys, tungsten, molybdenum, and graphite.
Gold-Based Alloys: Gold-based brazing materials are suitable for brazing important parts in the electronics and aviation industries. They are particularly used for electric vacuum devices and aviation engines due to their reliability and performance.
Palladium-Based Alloys: Palladium-based brazing materials are used in various industries including electronics and aerospace. They are available in different compositions to suit specific requirements such as graded brazing, high-temperature brazing, and brazing with special properties.
Amorphous Brazing Materials: These are a newer type of brazing material developed through rapid cooling and quenching technology. They are used in a variety of applications including plate-fin coolers, radiators, honeycomb structures, and electronic devices.
Each of these materials is selected based on the specific requirements of the brazing process, including the materials being joined, the operating conditions, and the desired mechanical and physical properties of the joint.
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