2, hexin casting precision casting is an important branch of precision casting industry, play an important role in many areas.Level of casting depends mainly on the following aspects, one is the product size precision casting production;The second is in the production of casting yield;Three is the product of the production efficiency;Four is the reliability of the casting products;Fifth, the service life of the casting.3, hexing precision casting understand, some domestic casting manufacturing enterprises often only when the design, manufacture from economic interests, often do much smaller.In fact, large castings under force is very big.Large foreign casting design strength is enough big, on the one hand boards generally choose forged steel P20 or 4140, and heat treatment, such products in the period of use, the product is absolutely reliable, long life.Our casting enterprises should actively learn advanced experience from foreign capital enterprise, accelerate product and technology innovation, to grab more market.