Which material used for making piston ring?
In addition to varying in thickness and diameter, piston rings now come in several different materials, styles, and coatings to maximize performance across various engine environments. Not too long ago, all piston rings were essentially the same: heavy, thick, and made exclusively from cast iron. Today, performance engine builders have a wide range of material choices for piston rings and finishes. This evolution is driven by the need for stronger ring materials that can withstand the harsh environments of higher cylinder temperatures and pressures. Before diving into materials, it's crucial to understand the responsibilities of a piston ring. While sealing combustion pressure is the primary goal, an equally important function is to transfer heat from the piston to the cylinder wall. As rings become thinner, this heat transfer function becomes even more critical. Additionally, the rings must minimize the amount of oil that enters the combustion space. ...