Metal casting has been widely used in our residential and industrial fields. Casting is the foundation of modern machinery manufacturing industry.
Casting process is to pour the melted metal into the mold, after the solidification by cooling, to get the curtain shape, size and performance of metal castings.
In 513 BC, we found the world's oldest iron casting - Cast Jin Ding, weighing about 270 kg. Europe began the production of cast iron around the eighth century AD. The emergence of cast iron expanded the application range of metal castings. For example, in the 15th to 17th Century, Germany, France and other countries have laid cast iron pipes to the residents drinking water. After the industrial revolution in 18th century, steam engines, textile machines, railways and other industries have developed very fast, so iron casting developed into a new period of industrial services for large industries. The casting technology began to have great development.
In 20th century, the development of casting is very fast, one important factor is the product of new technology, requires better casting with a variety of mechanical and physical properties, while still have good machining properties; Another reason is the mechanical industry itself and other industries such as chemicals, instruments and other development, all these factors created a favorable material conditions for the foundry industry. Such as the detection devices, to ensure the casting quality improvement and stability, and to provide the condition to the casting theory development. The invention of electronic microscope helped people to deep into the metal of the microscopic world, exploration of metal crystal mystery.
During this period, there was large development for various metal castings with superior performance, such as ductile iron, malleable welded cast iron, low carbon stainless steel, aluminum, copper, aluminum, aluminum-magnesium alloy, titanium-based, nickel-based alloys , and the invention of the gray cast iron inoculation of new technology, so that metal casting has a wider adaptability.
After middle of 20th century, there was high pressure molding with wet sand, chemical hardening sand molding and core making, molding and other special vacuum casting, shot blasting and other new technology to make castings with high shape, dimensional accuracy and good surface finish, foundry working conditions and environmental health is also greatly improved.
Since the 20th century, for foundry industry, gray iron inoculation treatment and chemical hardening sand molding process have two new special significance. These two inventions has broken the traditional methods for thousands of years, and has opened up new areas to improve the competitiveness of the casting.
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