The difference between cast iron and cast iron

　　To distinguish the difference between cast iron and cast iron is the most simple way, is the cast iron is heated metal processing and forming, and then use the tools and cast iron has been melted, and pour into a mould, to form the metal appearance.

　　

　　Of course is not only a simple molten metal and shaping. Add and remove all kinds of chemical elements will also affect the strength of the final product. History, wrought iron metal impurity is less, make the job easier, and obtain high strength of the final product.

　　

　　However, in modern times, the "purity" of the metal is no longer necessary to judge the quality of cast iron standard.

　　

　　Cast iron in metal purity is not high, but because of metal into the precision mold, you will get a more precision of the final product. Even more brittle, still was a great popularity in the United States, has been widely used. In the 19th century, because of the cast iron still USES a separate manual craft, and lower cost of cast iron and is suitable for batch production, so cast iron is more widely applied. This is very important to repair engineering. It is more economical and technical more trendy, such as nodular cast iron work, make the production of the parts shape larger, higher strength.

　　

　　Ductile iron invented in 1943. With spheroidal graphite makes it is higher than conventional ductile cast iron. Its flexibility and elasticity to make it suitable for cast iron products cannot be used. Bollards of foundry production line using ductile iron production bollards. Ductile iron bollards, decoration and construction nodular cast iron bollards provide the perimeter of the positioning, if necessary, can choose a bicycle parking or lock the car chain.