Casting, forging, suitable for the production under what circumstances?
Casting, mainly used in the case of mechanical processing can not be achieved. Such as complex internal cavities, or larger, irregular shape of the product. As the wheel of a car. If you want to use a piece of aluminum ingot to process its shape, there is no doubt that the processing allowance is too big, and the processing requirements for a long time. After casting the blank, only a small amount of cutting is needed to reduce the cost.Forging, mainly used for special mechanical properties and special shapes of products. Such as crane and crane hook. The mechanical properties of the hanger can not be met because of the casting or the processing of the profiles
Generally used for casting steel casting, mainly to cast steel (also known as cast iron, cast iron), melting process after casting parts all sorts of shapes is cast in the casting process, according to the addition of alloy elements, such as iron or iron generation castings, is a chemical change, including iron steel castings. Which is only used for forging production process heating forging steel or low carbon steel. This process can be formed, as well as the organizational structure and improve the strength of carbon steel, but the material nature itself does not change, is a physical change.
Casting is a metal forming method for casting with various objects, namely the liquid metal smelting, casting, injection, inhalation or other injection mold casting method prepared, cooling after falling sand, cleaning and postprocessing, obtained with a certain shape, size and performance of the object.A forging is an object in which the metal is applied to pressure to shape a desired shape or a suitable compressive force by plastic deformation. This force is typically achieved by using a hammer or pressure. The casting process constructed a fine grain structure and improved the physical properties of the metal. In the practical use of parts, a correct design allows the particles to flow in the direction of the main pressure
Casting suitable for the production of mechanical performance requirements are not high, do not withstand large alternating impact loading parts, when the shape of the parts and the shape of the cavity is complex, the general use of casting production.Forging production applies to parts of the mechanical properties of high demand, parts of the work process to withstand alternating load, impact load parts. Forging can be used to increase production efficiency and material utilization when parts are produced in large quantities.The essence of casting molding is to realize the liquid forming of metal by using the fluidity of molten metal. Casting is divided into sand casting and special casting, and special casting is divided into metal mold casting, investment casting, centrifugal casting, pressure casting and so on. Forging is divided into free forging and die forging. Die forging can be divided into die forging, press forging, hammer forging and so on.
