Surface Finishing Methods in Focus: Abrasive Blasting and Shot Peening

Surface preparation for sand blasting procedure

Surface finishing is an invaluable method in optimising various types of tools and media used in a range of industries such as foundry, shipbuilding and automotive. Through this process, individuals are able to provide industrial products with a host of advantages including durability, electrical resistance and conductivity, tarnish and chemical resistance and enhanced visual appeal.

Shot peening and abrasive blasting are two of the most popular surface finishing methods. Here’s what you need to know about them.

Shot Peening

Fatigue resistance is the main purpose of shot peening. In a NASA test conducted in 1982, researchers experimented on two groups of spur gears in terms of their surface fatigue pitting resistance in tooth contact area. Researchers, on one group, used a shot peening intensity of 7 to 9A on gear tooth surfaces. They did not shoot peen the second group.

The results reveal that the first group improved the spur gears’ pitting resistance improved by 1.6 times. Ever since, the automotive industry has relied to shot peening for optimising cars and trucks’ gearboxes as well as other crucial automobile components. Other industries soon followed. Industries that are looking for quality shot peening machines should look for a surface finishing machine provider like Syntech.

Abrasive Blasting

This process comes in two types: wet and dry. If you opt for dry blasting, the needed materials are sand, silicon carbide, metallic grit and aluminium oxide. Meanwhile, wet blasting requires glass beads, sand and other buoyant materials. Among other purposes, one commonly uses abrasive blasting to clean surfaces.

Apart from the highly technical functions of shot peening, the difference between the abrasive blasting and shoot peening two relies on the application. If you need services like descaling, deflashing and deburring, you will need to choose blasting as your required finishing method. On the other hand, if you require metal optimisation, go for shot peening.