Casting is a metal forming object which is made of various casting methods that people put the molten metal into a pre-prepared cast by pouring, injection, inhalation or other casting methods. After it cooled, polished and other subsequent processing methods. Its shape, size and performance come out.
In modern times, the casting is mainly used as the blank of machine parts, some precision castings, also can be used as machine parts directly. The casting has a large proportion in the mechanical products, such as the tractor, the casting weight is about 50~70% of the weight of the whole machine, 40~70% of the agricultural machinery, and 70~90% of the machine tools and internal combustion engines. Among all kinds of castings, the castings used by machine has the most variety, the most complex shape and the largest dosage, which is about 60% of the total casting output. The second is the metallurgical steel ingot mould and the project pipeline, as well as some tools in life.
Castings are also closely related to daily life. For example, door handle, door lock, radiator, water pipe, iron pot, gas stove, iron, etc., all these are casting.
Casting is widely used in hardware and whole machinery electronics industry, and its use is growing. Specific use in construction, hardware, equipment, engineering machinery and other large machinery, machine tools, ships, aerospace, automobiles, motorcycles, electronics, computers, electrical appliances, lamps and lanterns, and other industries, people contact many of them, but few know the metal objects