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Stainless steel brazing development history and characteristics

Brazing is the earliest material joining method used by humans. It has been used for many years. Brazing has many advantages, so people like it. It is also very popular in some industries. Let us and Haituo know about stainless steel. Brazing application characteristics and development history.

  First, brazing

Brazing refers to a welding method in which a solder and a weldment lower than the melting point of the weldment are simultaneously heated to the melting temperature of the solder, and the gap between the solid workpieces is filled with the liquid solder to connect the metal. In brazing, the oxide film and oil stain on the contact surface of the base metal are first removed to facilitate the capillary action after the solder is melted, and the wettability and capillary fluidity of the solder are increased. Brazing is divided into brazing and soldering according to the melting point of the solder.

The brazing deformation is small, the joint is smooth and beautiful, and it is suitable for welding precision, complex and components composed of different materials, such as honeycomb structural plates, turbine blades, carbide tools and printed circuit boards. Before the brazing, the workpiece must be carefully processed and strictly cleaned to remove oil and excessively thick oxide film to ensure the interface assembly gap. The gap is generally required to be between 0.01 and 0.1 mm.

Compared with fusion welding, the base metal does not melt during brazing, and only the brazing material melts;

Compared to pressure welding, no pressure is applied to the weldment during brazing.

The weld formed by brazing is called a braze.

Second, the development process

Brazing is one of the earliest methods of material joining used by humans. When humans have not started using iron, they have invented brazing to join metals. In the ancient works unearthed in Egypt, the tubes brazed with silver-copper brazing materials and the talisman boxes connected with gold brazing materials were examined according to the items 5,000 years ago and nearly 4,000 years ago. In the ruins of Pompeii, which was buried in the volcanic eruption in 79 AD, there are remains of brazed household brazing pipes. The brazing filler metal has a composition ratio of Sn:Pb=1:2, similar to the brazing filler metal used in modern times. . China also used tin-lead alloy brazing filler metal in the early 5th century BC, and also used brazing technology in the Terracotta Warriors and Horses. China's earliest known brazing in the literature is that there is a cloud in the Han Shu written by Ban Gu in the Han Dynasty: "Hu Tong tears like tears, can be welded with gold and silver, and is used by artisans today."


Third, application characteristics

(1) Brazing heating temperature is low, the joint is smooth and flat, the structure and mechanical properties change little, the deformation is small, and the workpiece size is accurate.

(2) The same kind of metal can be welded, and the dissimilar materials can be welded, and the thickness difference of the workpiece is not strictly limited.

(3) Some brazing methods can weld multiple weldments and multiple joints at the same time, and the productivity is high.

(4) The brazing equipment is simple and the production investment cost is small.

(5) The joint strength is low, the heat resistance is poor, and the pre-weld cleaning requirements are strict, and the brazing material is expensive.
 
Haituo high frequency brazing machine welding (brazing, silver welding, brazing):

It mainly connects the two materials of the same material or different materials by heating to a certain temperature to melt the solder. The specific application is as follows:

1. Welding of various hardware tools: welding of diamond tools, grinding tools, drilling tools, alloy saw blades, carbide turning tools, milling cutters, reamers, planers, woodworking drills, etc.;

2, the welding of various hardware machinery parts: hardware bathroom products, refrigeration copper parts, lighting accessories, precision mold parts, metal handles, egg beaters, alloy steel and steel, steel and copper, copper and copper equivalent metal or dissimilar metals Silver welding, brazing;

3. The composite bottom welding is mainly used for the three-layer brazing of round, square and other shaped flat stainless steel pot bottoms and aluminum sheets, and can also be used for other metal plane brazing.

4, electric kettle (electric coffee pot) heating plate welding is mainly used for brazing between stainless steel flat bottom, aluminum sheet and various shapes of electric heating tube.

Presumably, everyone has learned about the application characteristics and development history of brazing of stainless steel through the introduction of Haituo Electromechanical, and the cost of investment in brazing production is very low, which is also the reason for the wide application.
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