In addition to its high hardness, strength and corrosion resistance, beryllium bronze has the following characteristics when used as a wear-resistant material:

A film mainly composed of oxides is formed on the surface of beryllium copper, which has strong adhesion, autogenous and strong characteristics. Can provide partial lubrication, reduce friction, reduce wear and eliminate friction damage.

The good thermal conductivity of beryllium bronze dissipates the heat generated by the rotation of the rotating shaft under high load, reducing the melting of the shaft and bearing. Thus sticking does not occur. Examples of beryllium bronze casting alloys used as wear parts:

Mine wheel bearings made of domestic beryllium bronze, pressure test pump bearings and other heavy loads and high pressures have achieved excellent results. It has been widely used in various bearings and bushings of aircraft abroad, and its service life can be nearly three times longer than that of nickel bronze. For example, it is used for sliding bearings on military transport frames, bearings for rotating clutches, and bearings on civil aviation Boeing 707, 727, 737, 747, F14, and F15 fighter jets; American Airlines uses beryllium bronze alloy bearings to replace the original Al bearing /FONT>Ni bronze cast bearing, the service life is increased from the original 8000 hours to 20000 hours.

The beryllium bronze inner sleeve of the mold of the horizontal continuous casting machine has a service life of about three times that of the phosphorus deoxidized copper; the service life of the beryllium bronze injection head (punch) of the die casting machine is nearly 20 times longer than that of cast iron. It has been widely used at home and abroad.

For blast furnace tuyere. A test tuyere developed by the United States Steel Corporation, the water-cooled beryllium copper nozzle extends into the furnace, the hot air temperature inside the nozzle is 9800c, and the steel tuyere works for an average of 70 days, while the beryllium bronze tuyere can reach 268 days. 3-2-4 is used in drilling machinery, stove mining machinery, automobile, diesel engine and other machinery industries. For example, the shaft sleeve of the main drilling rig of the US 3″ bit is made of beryllium bronze, which triples the rock drilling efficiency.

Beryllium bronze is used on a high-speed printing press capable of printing 7,200 words per minute, increasing the number of pictographs from the original 2 million words to 10 million words.

Used as corrosion resistant material

Beryllium bronze alloys resist abrasion as well as deoxidized copper without stress corrosion cracking or argon embrittlement. It has good corrosion fatigue strength in air and salt spray; in acidic medium (except argon fluoric acid), the corrosion resistance of phosphor bronze is twice as high; in seawater, it is not easy to cause pitting corrosion, biological plugs or cracks, etc. , The anti-corrosion life can reach 20/FONT>30 years, the biggest use is the shell of the submarine cable repeater, the shell of the motor and the repeater, and the universal shell of the motor and the repeater. Domestically, beryllium bronze has been used as acid-resistant material for hydrometallurgical sulfuric acid medium, such as S-type stirring shaft of kneader, pump casing of acid-resistant pump, impeller, shaft, etc.

used as electrode material

High conductivity beryllium bronze casting alloy has good electrical conductivity, thermal conductivity, high hardness, wear resistance, explosion resistance, and crack resistance properties can be maintained even at higher temperatures. This alloy material is used as an electrode-related component of a fusion welding machine, and can receive the effects of less loss and low total welding cost. It is an ideal material for welding. The American Welding Society specifies beryllium bronze as the electrode material.

as a safety tool

Beryllium bronze alloys do not flower when impacted or rubbed. And has non-magnetic, wear-resistant, corrosion-resistant properties. It is very suitable for making safety tools used in explosive, flammable, strong magnetic and corrosive occasions. BeA-20C alloy was subjected to an impact energy of 561IJ in 30% oxygen or 6.5-10% methane air-oxygen, and it was impacted 20 times without sparks and combustion. The labor safety departments of the United States, Japan and other countries have respectively formulated regulations that beryllium copper safety tools must be used in dangerous places that require fire prevention and riot control. The use of beryllium copper safety tools is a preventive measure to prevent fire and explosion accidents in places where explosives are stored and where these dangerous products are used. The main scope of application is: petroleum refining and petrochemical industry, stove mine, oil field, natural gas chemical industry, gunpowder industry, chemical fiber industry, paint industry, fertilizer industry, and various pharmaceutical industries. Petroleum ships and liquefied petroleum gas vehicles, airplanes, warehouses dealing with flammable and explosive products, electrolysis workshops, communication machine assembly workshops, places that require tools not to rust, wear-resistant and anti-magnetic, etc.

Although beryllium and its alloys and beryllium oxide were developed relatively early, their applications are mainly concentrated in nuclear technology, weapon systems, space structures, ray windows, optical systems, instrumentation, and household appliances. It may be said that the rise of early high-tech fields promoted the development and application of beryllium and its alloys, and later gradually expanded to household appliances, automobiles, communications and other fields. Be-Cu alloys have a wider range of applications.

The toxicity, brittleness, high price and other factors of beryllium limit the application and development of beryllium materials. Nevertheless, beryllium materials will still show their talents in situations where other materials cannot be replaced.

This paper systematically discusses the properties and uses of beryllium and its alloys, beryllium oxide, and beryllium composites since the discovery of beryllium. The application of beryllium makes a new contribution.