众所周知,生铁分为白口铁、灰口铁、球墨铸铁。白口铁的断口呈暗白色、硬而脆、难加工,一般只用于炼钢,故又称为炼钢生铁;灰口铁的断口呈深灰色,具有较好的机械加工和铸造等性能,但强度较差,不能锻轧,只能用于锻造化工机械和铸件,故又被称为铸造生铁(简称铸铁); As we all know, pig iron is divided into white iron, gray iron, ductile iron. The white iron cut off dark white, hard and brittle, difficult to process, generally only used in steelmaking, it is also known as steelmaking pig iron; gray iron fracture dark gray, with better machining and casting properties , But the strength is poor, can not be forged, can only be used for forging chemical machinery and castings, it is also known as cast iron (referred to as cast iron);