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How to maintain the vacuum furnace
1. Regularly check the vacuum instrument to obtain the working state of the equipment. After the work, the vacuum furnace shall be kept in the vacuum state of 133pa 2. When there is dust or unclean inside the equipment, wipe it with silk cloth soaked in alcohol or gasoline and dry it. 3. When th...Read more -
Brazing of Aluminum Matrix Composites
(1) Brazing characteristics aluminum matrix composites mainly include particle (including whisker) reinforcement and fiber reinforcement. The materials used for reinforcement mainly include B, CB, SiC, etc. When the aluminum matrix composites are brazed and heated, the matrix Al is easy to react ...Read more -
Brazing of graphite and diamond polycrystalline
(1) Brazing characteristics the problems involved in graphite and diamond polycrystalline brazing are very similar to those encountered in ceramic brazing. Compared with metal, solder is difficult to wet graphite and diamond polycrystalline materials, and its coefficient of thermal expansion is v...Read more -
Brazing of Superalloys
Brazing of Superalloys (1) Brazing characteristics superalloys can be divided into three categories: nickel base, iron base and cobalt base. They have good mechanical properties, oxidation resistance and corrosion resistance at high temperatures. Nickel base alloy is the most widely used in pract...Read more -
Brazing of precious metal contacts
Precious metals mainly refer to Au, Ag, PD, Pt and other materials, which have good conductivity, thermal conductivity, corrosion resistance and high melting temperature. They are widely used in electrical equipment to manufacture open and closed circuit components. (1) Brazing characteristics as...Read more -
Brazing of ceramics and metals
1. Brazeability It is difficult to braze ceramic and ceramic, ceramic and metal components. Most of the solder forms a ball on the ceramic surface, with little or no wetting. The brazing filler metal that can wet ceramics is easy to form a variety of brittle compounds (such as carbides, silicides...Read more -
Brazing of refractory metals
1. Solder All kinds of solders with temperature lower than 3000 ℃ can be used for W brazing, and copper or silver based solders can be used for components with temperature lower than 400 ℃; Gold based, manganese based, manganese based, palladium based or drill based filler metals are usually used...Read more -
Brazing of active metals
1. Brazing material (1) Titanium and its base alloys are rarely brazed with soft solder. The brazing filler metals used for brazing mainly include silver base, aluminum base, titanium base or titanium zirconium base. Silver based solder is mainly used for components with working temperature less ...Read more -
Brazing of copper and copper alloys
1. Brazing material (1) The bonding strength of several commonly used solders for copper and brass brazing is shown in table 10. Table 10 strength of copper and brass brazed joints When brazing copper with tin lead solder, non corrosive brazing flux such as rosin alcohol solution or active rosin...Read more -
Brazing of aluminium and aluminium alloys
1. Brazeability The brazing property of aluminum and aluminum alloys is poor, mainly because the oxide film on the surface is difficult to remove. Aluminum has great affinity for oxygen. It is easy to form a dense, stable and high melting point oxide film Al2O3 on the surface. At the same time, a...Read more -
Brazing of stainless steel
Brazing of stainless steel 1. Brazeability The primary problem in stainless steel brazing is that the oxide film on the surface seriously affects the wetting and spreading of solder. Various stainless steels contain a considerable amount of Cr, and some also contain Ni, Ti, Mn, Mo, Nb and other e...Read more -
Brazing of cast iron
1. Brazing material (1) Brazing filler metal cast iron brazing mainly adopts copper zinc brazing filler metal and silver copper brazing filler metal. The commonly used copper zinc brazing filler metal brands are b-cu62znnimusir, b-cu60zusnr and b-cu58znfer. The tensile strength of the brazed cast...Read more