The difference between forged valves cast valves

Casting valve: It is to smelt metal into a liquid that meets the requirements  pour it into the specified valve model. After cooling, solidification  cleaning, valve castings with predetermined shape, size  performance can be obtained. This is the whole process of casting valves. .

The connection between casting  valve is after the 20th century. The rapid development of casting has created ductile iron, malleable iron, ultra-low carbon stainless steel, aluminum-copper, aluminum-silicon, aluminum-magnesium alloy, titanium, which are still often used in valve products. Cast metal materials such as base  nickel-based alloys.

The main advantage of casting is that the cost of the blank produced by casting is low,  it is more economical for parts with complex shapes, especially with complex inner cavities. At the same time, it has wide adaptability  good comprehensive mechanical properties. However, there are many materials  equipment required for casting production,  dust, harmful gas  noise will be generated to pollute the environment.

Forging valve is a processing method that uses forging machinery to apply pressure to metal valve blanks to produce plastic deformation to obtain forgings with certain mechanical properties, certain shape  size. Forging can be divided into open forging (free forging)  closed mode forging according to the forming method. Forging can be divided into hot forging, warm forging  cold forging according to the deformation temperature. Forging materials are mainly carbon steel  alloy steel of various compositions, followed by aluminum, magnesium, titanium, copper, etc.  their alloys. The original state of the material is bar, ingot, metal powder  liquid metal. The ratio of the cross-sectional area of the metal before deformation to the die cross-sectional area after deformation is called the forging ratio.

Through forging, the as-cast looseness  welding holes of the metal can be eliminated,  the mechanical properties of forgings are generally better than those of castings of the same material. For important parts in machinery with high load  severe working conditions, forgings are mostly used in addition to rolling plates, profiles  welded parts with simple shapes. Correct selection of forging ratio has a lot to do with improving product quality  reducing costs.