China in 513 BC, cast the earliest written records of cast iron parts of the world – the state of Jin cast cauldrons and weighs about 270 kilograms.craft has reached a quite high level, Casting refers to the solid metal melt as liquid into the specific shape of the casting, awaiting the coagulation process, processing way of solidification, include: cast iron parts, cast copper parts,cast aluminum parts etc, special casting mold include: lost foam casting, sand mould casting, investment casting, metal mold casting, ceramic mold casting, etc. common mold material is the original sand, clay, sodium silicate, resin and other auxiliary materials. the original sand include: magnesia olivine sand, disthene sand and graphite sand, quartz sand, magnesia and zircon sand and chromite sand, iron ore, etc.
In Europe before and after the eighth century began the production of iron castings. The emergence of cast iron parts, expand the application range of castings. In the 15 ~ 17 century, for example, Germany, France and other countries has been equipped with a lot of to residents cast iron parts(pipes) for drinking water. Afterthe industrial revolution of 18th century, industries of the steam engine, the loom and railway were on the upgrade ,casting into the new period for serving the great industry ,the technology of casting had great. Development.
As cast iron parts have advantages of low cost, excellent manufacturability and reproducibility, their applications can be seen in many ways till now. These involved ones include desulphurization and filtrations of melted iron, manufacturing of thin and high-intensity iron castings and Fe composites, metal case hardenings and partly hardenings, a whole set of technique for austempered ductile iron, other special techniques and equipments involving metal mold casting, iron based coated sand casting, continuous casting and etc.. In addition, because light alloys, made from cast iron parts, have low density, high strength-to-weight ratio and corrosion resistance features, they’re believed to be widely applied in aviation, aerospace, automobile, machinery or more. Especially as for auto industry, for the purpose of reducing fuel consumption and improving energy efficiency, aluminum-nickel alloy castings will be replaced for iron and steel castings. Thus, it’s certain to be a long-term tendency in future.
As cast iron parts have features of light weight, good appearance and excellent corrosion resistance, they can meet certain mechanical properties. However, compared with iron castings, melting quality of cast iron parts is problematic and hard to control operation procedures. Aluminium casting welding has advantages of high production efficiency and simple equipment requirement. It’s of great significance to increasing machine utilization and improving economic performance. Therefore, it’s widely applied in repairing engineering machinery. Cast iron parts are a kind of aluminum alloys, added into pure aluminum with alloying elements, which are not only all the good performances from pure aluminum, but also higher strength. Though, it’s very hard to restore cast iron parts.