Bronze - is an alloy consisting of copper and improve its properties alloying elements, most of which is used - tin, aluminum or lead. In the presence of tin bronze and pewter are divided into Tinless. Depending on the method followed by the bronze divided into wrought and cast alloys, which are made of cast bronze. Casting may be tin bronze, these include BrOTsS3-12-5 marks and other BrOTsS5-5-5 contain tin, zinc and lead in the percentage figures indicated in the same sequence, i.e. BrOTsS3-12-5 includes 3% tin, 12% zinc and 5% lead, and another stamp BrOTsSN3-7-5-1 contains 1% nickel. Tinless bronze BrA9Mts2L brands BrA9ZhZL, and the other containing a percentage of aluminum and BrSZ0, BrSuZNZTsZS20F containing lead.
Depending on what class of accuracy want to get castings, using various molding methods. Simple and cost-effective way - in the form of casting sand and clay, but in view of the active gas formation in the casting process, it is - the rudest. The roughness of the product more than 0.3 mm. It used this method rarely, and only for the manufacture of very large workpieces.
Casting using a cast models allows to obtain a sufficiently high precision product with a wall thickness of 0.5 mm and weighing from a few grams. It is made of bronze casting of complex forms, including art works.
Centrifugal casting is used in the manufacture of bushings and other products made of bronze, which require high strength and density of the metal.
Under controlled pressure-volume molded parts with minimum tolerances to reduce the labor intensity of production.
Another method of casting - in a metal mold - releasable form of the metal, which can be used repeatedly. It is used for the manufacture of mass-produced parts of simple shapes.
One of the most promising currently considered gasified using technology that is vaporized during casting models.
Bronze castings are widespread from heavy engineering to products of high aesthetic value.