Okay kiddo, so you know how steel belts are really strong and durable, right? Well, sometimes they need a little extra help to make them even stronger. That's where shot peening comes in!
Imagine you have a bunch of tiny balls (called "shots") that are made of really hard materials like steel or ceramic. Now imagine putting those little balls in a machine that blows them at the steel belt really fast and really hard.
The balls hit the steel belt over and over again, like a million little hammer blows. But instead of damaging the steel, it actually makes it stronger!
That's because the force of the little balls hitting the steel makes it compress and flex in a certain way. This is called "residual stress." It's like when you squish a spring together and then let it go - it springs back with more force than before.
When the steel belt has residual stress from shot peening, it can handle more force and wear and tear without breaking. It's like putting armor on the steel!
So, shot peening is like giving the steel belt extra strength and protection by bombarding it with little balls that make it tougher. Cool, huh?