Brazing, a solid phase and liquid phase welding method!
Release time:
2022-07-12
【Summary Description】 The energy source for brazing can be chemical reaction heat or indirect heat energy. It is the use of lower than the melting point of the melting point of the material to be welded metal as solder, after heating the solder melting, capillary action will be the solder and into the gap between the contact surface of the joint, wetting the surface of the metal to be welded, so that the liquid phase and the solid phase between the diffusion and the formation of brazing joints. Therefore, brazing is a solid phase and liquid phase welding method. Characteristics and application of brazing Brazing uses an alloy with a melting point lower than that of the base metal as a brazing filler metal. When heated, the brazing filler metal melts and fills and remains in the joint gap by wetting and capillary action. The base metal is in a solid state and relies on the mutual diffusion between the liquid brazing filler metal and the solid base metal to form a brazing joint. Brazing has little effect on the physical and chemical properties of the base metal, the welding stress and deformation are small, and the dissimilar metals with large differences in welding performance can be welded at the same time. The joint appearance is beautiful and neat, the equipment is simple, and the production investment is small. However, the strength of the brazed joint is low and the heat resistance is poor. Applications: Carbide cutting tools, drill bits, bicycle frames, heat exchangers, conduits and various containers; in the manufacture of microwave waveguides, electronic tubes and electronic vacuum devices, brazing is even the only possible connection method. The brazing filler metal is the filler metal that forms the brazed joint, and the quality of the brazed joint depends to a large extent on the brazing filler metal. The brazing filler metal should have suitable melting point, good wettability and caulking ability, can diffuse with the base metal, and should also have certain mechanical properties and physical and chemical properties to meet the performance requirements of the joint.
The energy source for brazing can be chemical reaction heat or indirect heat energy. It is the use of lower than the melting point of the melting point of the material to be welded metal as solder, after heating the solder melting, capillary action will be the solder and into the gap between the contact surface of the joint, wetting the surface of the metal to be welded, so that the liquid phase and the solid phase between the diffusion and the formation of brazing joints. Therefore, brazing is a solid phase and liquid phase welding method.
Characteristics and application of brazing
Brazing uses an alloy with a melting point lower than that of the base metal as a brazing filler metal. When heated, the brazing filler metal melts and fills and remains in the joint gap by wetting and capillary action. The base metal is in a solid state and relies on the mutual diffusion between the liquid brazing filler metal and the solid base metal to form a brazing joint. Brazing has little effect on the physical and chemical properties of the base metal, the welding stress and deformation are small, and the dissimilar metals with large differences in welding performance can be welded at the same time. The joint appearance is beautiful and neat, the equipment is simple, and the production investment is small. However, the strength of the brazed joint is low and the heat resistance is poor.
Applications: Carbide cutting tools, drill bits, bicycle frames, heat exchangers, conduits and various containers; in the manufacture of microwave waveguides, electronic tubes and electronic vacuum devices, brazing is even the only possible connection method.
The brazing filler metal is the filler metal that forms the brazed joint, and the quality of the brazed joint depends to a large extent on the brazing filler metal. The brazing filler metal should have suitable melting point, good wettability and caulking ability, can diffuse with the base metal, and should also have certain mechanical properties and physical and chemical properties to meet the performance requirements of the joint.
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