Shot peening creates small indentations on a metal’s surface to improve its physical properties. You might have seen these tiny spots on the surface of metals. But do you know what they are? They are small indentations, around 2-5 micrometers in size, made due to the high pressure of small metal particles called shots.
People use this to increase the fatigue resistance of metal parts.
Shot peening machines improve the surface finish of a metal part. It is a process used to improve a metal segment’s fatigue and part life, mainly for metals like aluminum, magnesium, steel, titanium, and nickel. This blog will look at how shot peening is done, the materials used, and the processes used.
How Does Shot Peening Work?
The process improves the strength and durability of metal parts. It works by firing small metal pellets at the surface of the metal, which creates tiny indentations. These indentations help increase the amount of surface area in contact with the metal, increasing the metal’s strength. This is often used on parts subject to high-stress levels, such as gears and shafts.
Difference Between Shot Blasting & Peening
Shot blasting and peening are two surface-finishing processes that are often confused. While both methods involve using small metal pellets to improve the surface of a workpiece, there are some critical differences between the two.
Shot blasting typically uses larger pellets and is generally used to remove surface contaminants or to prepare a surface for painting or other coatings. Shot peening, on the other hand, uses smaller pellets and is typically used to improve the strength of a workpiece by inducing compressive stresses on the surface. The critical difference between shot blasting and shot peening is the size of the pellets used and the desired outcome of the process.
Top-notch Advantages Of Shot Peening
It is typically used on parts subject to high-stress levels, such as gears and shafts. The process involves bombarding the surface of the metal with tiny metal pellets. It creates a layer of compressive stress on the surface of the metal, which helps to resist the effects of fatigue and wear.
Shot peening machines can enhance the metal part’s effectiveness without adding weight or changing the dimensions of the elements. It is also a relatively low-cost process, which makes it an attractive option for manufacturers.
Limitations Of Shot Peening
- The process can create small pits or divots on the surface of the treated material.
- Shot peening can also make tiny cracks in the material’s surface, potentially leading to failure under load.
- The process can also distort the shape of the material, mainly if the material is thin or fragile.