Reasonable Structure Of Castings

- Sep 14, 2017 -

Castings are widely used in mechanical products, mainly in the following characteristics of casting methods:

1. Compared with forging, stamping, welding and powder metallurgy, the casting method can produce a complex shape, especially a blank and a part with complex inner cavity shape. such as internal combustion engine body, cylinder head, machine tool bed body, box, all kinds of pump body, boat with SRTEPC rotor and so on. and to the casting method to the part structure shape limit small, the casting may according to the ' force condition use the most reasonable section shape, and according to the need also may set the reinforcement reinforcement and so on, to mention. Casting Parts Structure strength and stiffness. If the forged steel crankshaft is changed into nodular cast iron crankshaft, the structural strength and stiffness of the cast crankshaft can be increased by changing the structure of the Chisi, Casting Parts uranium hole and other parts.

Under certain conditions, the structure of the parts can be made more reasonable by using special casting, inlay casting, double gold casting, small channel casting technology and casting and welding structure. These methods can also be used to solve some difficult problems in other metal forming methods to achieve better technical and economic results. For example, because of the development of jet engines, Casting Parts it is required to manufacture high temperature alloy parts, such as turbine blades, that are accurate in size, complex in shape and difficult to be machined or even finished without cutting, and work at high temperatures above 1000^. For this kind of parts with small complex inner cavity using the method of investment casting and ceramic core, Casting Parts it can not only solve the problem of machining difficulty or can not be processed, but also can improve the passing rate of parts and save the high quality alloy materials.

Casting method can be used to produce various materials and sizes of castings. At present, the commonly used metal in industry can be cast, and some gold materials, Casting Parts such as the use of very extensive cast iron, can only be formed by casting methods. The size of the castings can be produced from small to several grams of instrument parts to 200 or 300 tons of metallurgical mines and power equipment heavy castings.

The cost of castings is generally lower. This is because the foundry used raw materials are relatively inexpensive, a wide range of sources, Casting Parts but also directly using the scrap gold to remelting. At the same time, there is no need for expensive equipment under normal circumstances. In addition, because the shape and size of the castings are close to the final part, it can reduce the cutting work, Casting Parts save metal and reduce the cost of the parts.

The mechanical properties of castings are lower than that of the same material. In addition, the forging process can ensure the continuity of metal fibrous tissue, make the forging of fibrous tissue and forgings to maintain the same shape, metal streamline integrity, can ensure that the parts have good mechanical properties and long service life using precision forging, cold extrusion, warm extrusion, Casting Parts such as the production of forgings, castings can not be compared with the forging is metal pressure An object that shapes a required shape or an appropriate compressive force by plastic deformation. This power is typically achieved by using a hammer or pressure. The casting process builds fine granular structures and improves the physical properties of the metal. Casting Parts In the practical use of parts, a correct design can make the particle flow in the direction of the main pressure. Castings are metal forming objects obtained from various casting methods, that is, the smelting of liquid metal, with pouring, injection, inhalation or other casting methods into the prepared mold, after cooling through the sand, cleaning and treatment, etc , Casting Parts the resulting in a certain shape, size and performance of the object.