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Specialized in R&D and production of aerosolized alloy powder materials

Brazing common sense

Powder common sense

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Element Essential Knowledge

Material Essential Knowledge

Metal Powder

Metal powder refers to a group of metal particles with a size less than 1mm. Including single metal powder, alloy powder and some refractory metal compounds powders with metallic properties, they are the main raw materials of powder metallurgy. Metal elements are generally silver-white. It will be black powder when the metal is under certain conditions, Most metal powders are black.

Alloy Powder

Metal powder formed by partial or complete alloying of two or more components. Alloy powders are classified according to their composition into iron alloy powder, copper alloy powder, nickel alloy powder, cobalt alloy powder, aluminum alloy powder, titanium alloy powder and precious metal alloy powder.

Brazing

Brazing refers to a welding method in which the brazing materials lower than the melting point of the weldment and meanwhile the weldment heated to the brazing materials that after melting temperature , and then used the liquid brazing materials to fill the gaps between the solid workpieces to connect the metals. Firstly the oxide film and oil stains on the contact surface of the base metal be removed to facilitate the capillary function after the solder melts and increase the wettability and capillary fluidity of the solder when brazing. According to the different melting points of solder, brazing is divided into hard soldering and soft soldering.

Brazing Materials

Solder is a general term for metal alloy materials used to fill welds, surfacing layers and brazing seams. Including welding wire, welding rod, welding powder, solder paste, welding sheet, welding ribbon, brazing and soldering alloy, etc.

Brazing powder

Brazing powder is a powdery material that improves the weldability during high-temperature welding of metals and alloys. By dissolving the solder powder, it improves the fluidity of the material surface. The general ingredient is borax. Can be called flux.

Solder Paste

Solder paste is a homogeneous mixture composed of alloy solder powder, paste flux and some additives. It is a paste with certain viscosity and good thixotropy. It is a homogeneous, stable mixture. solder paste can initially stick electronic components to a specific position at normal temperature. When the solder paste is heated to a certain temperature, as the solvent and some additives evaporate and the alloy powder melts, the solder paste reflows, causing the components to be soldered to adhere to each other. The solder pads are interconnected together and cooled to form a permanently connected solder joint.

Powder Metallurgy

Powder metallurgy is a process technology that prepares metal powder or uses metal powder (or a mixture of metal powder and non-metal powder) as raw materials to manufacture metal materials, composite materials and various types of products through shaping and sintering. Powder metallurgy is similar to the production of ceramics. Both belong to powder sintering technology. Therefore, a series of new powder metallurgy technologies can also be used for the preparation of ceramic materials. Due to the advantages of powder metallurgy technology, it has become the key to solving new material problems and plays a decisive role in the development of new materials. Powder metallurgy includes powder making and products. Among them, milling is mainly a metallurgical process, which is consistent with the literal meaning. Powder metallurgy products often go far beyond the scope of materials and metallurgy, and are often technologies across multiple disciplines (materials and metallurgy, machinery and mechanics, etc.). In particular, modern metal powder 3D printing integrates mechanical engineering, CAD, reverse engineering technology, layered manufacturing technology, CNC technology, material science, and laser technology, making powder metallurgy product technology a modern comprehensive technology that spans more disciplines.

Powder Metallurgy Materials

Porous, semi-dense or fully dense materials (including products) produced by powder metallurgy processes. Powder metallurgy materials have unique chemical compositions and physical and mechanical properties that cannot be obtained by traditional melting and casting processes. For example, the porosity of the material is controllable, the material structure is uniform, and there is no macro segregation (after the alloy solidifies, there is no macro segregation in different parts of the cross section due to the liquid alloy. Uneven chemical composition caused by flow), can be molded in one go, etc.

Metal Injection Molding (MIM)

Metal Injection Molding (MIM) is a new powder metallurgy near-net forming technology derived from the plastic injection molding industry. As we all know, plastic injection molding technology can produce products of various complex shapes at low prices, but the strength of the plastic product is not high. In order to improve its performance, metal or ceramic powder can be added to the plastic to obtain products with higher strength and good wear resistance. In recent years, this idea has evolved to maximize the solid particle content and completely remove the binder and densify the parison during the subsequent sintering process. This new powder metallurgy forming method is called metal injection molding.

3D Printing Additive Manufacturing

3D printing (3DP) is a type of rapid prototyping technology, also known as additive manufacturing. It is based on digital model files and uses adhesive materials such as powdered metal or plastic to construct structures through layer-by-layer printing technology of objects.

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