Casting has a long history of application. Ancient people used castings and some living utensils. In modern times, castings are mainly used as blanks for machine parts, some precision castings can also be used directly as parts of machines. Castings in the mechanical products occupies a large proportion, such as tractor, casting weight about the total weight of the $number, agricultural machinery accounted for 40, machine tools, internal combustion engines, such as Tatsu $number. All kinds of castings, the most mechanical castings, the most complex shape, the largest amount, about 60% of the total production of castings. The second is the metallurgical ingot mold and engineering pipeline, as well as the life of some tools.
Castings are also closely related to daily life. For example, the use of door-lock, door locks, radiators, water pipes, iron pans, gas stove racks, irons, etc., are castings.