What are the advantages and disadvantages of casting parts compared with forging parts? How to choose when designing?
Exit. 4 、 casting is a kind of metal hot processing technology which has been mastered for more than 6000 years. In 3200 BC, bronze frog castings appeared in Mesopotamia. Between 13 BC to tenth Century, China has entered the golden age of bronze casting, technology has reached a very high level, such as the Shang Dynasty weighs 875 kilogram Simuwu quadripod, Ceng Houyi statue of the Warring States period and Han Dynasty light microscope are representative of the ancient casting products. The early casting was greatly influenced by pottery, and the castings were mostly tools or utensils for agricultural production, religion, life and so on. In 513 BC, Chinese cast out of the world's earliest recordedin the iron - cast Jin Ding (about 270 kilograms). Around the year eighth Century, Europe began to produce cast iron parts. After the industrial revolution of eighteenth Century, castings entered a new period of service for large industries. In twentieth Century, the development of casting speed, has developed a ductile iron, malleable cast iron, super low carbon stainless steel and aluminum, aluminum silicon, aluminum magnesium alloy, titanium, nickel based alloy casting materials, and invented a new process of inoculation of gray iron.
The difference between casting and forging, casting, casting, 1: is the metal melting in compliance with the requirements of the certain liquid and poured into the mold, the cooling solidification, cleaning after processing a predetermined shape, size and properties of castings (part or blank) process. The basic process of modern machine building industry. 2, the blank casting production cost is low, the complex shape, especially with complex inner parts, it can show its economy; and its wide adaptability, and has good mechanical properties. 3, but casting needed for the production of materials (such as metal, wood, fuel and other materials) and equipment (such as metallurgical furnace, sand mixing machine, molding machine, core making machine, sand machine, shot blasting machine, cast iron plate etc.) more, and harmful gas and dust, noise and pollution to the environment.
Casting: smelting metal, making mold, and pouring molten metal into the mold, after solidification to obtain a certain shape, size, composition, microstructure and properties, forming method of casting. There are Susong, not dense, not adapt to important parts;Forging: in forging equipment and work (mold) under the action of the blank or ingot to produce plastic deformation, in order to obtain a certain geometry size, shape and quality of the forging method. Dense and important parts.
Casting parts easy to produce pores, cracks, shrinkage defects, not suitable for important parts. When the defect of ingot forging parts produced by forging have been dispersed, no stress concentration phenomenon, can be an important thing. Casting, however, can be a complex part.
