With the improvement of engine reinforcement, piston materials are also constantly evolving. Traditional pistons mainly use aluminum alloy due to its low density and good thermal conductivity. Aluminum alloy pistons are divided into two types: casting and forging: complex casting process, low cost, suitable for ordinary civilian use; Forged pistons are formed through mold forging, with continuous metal fibers inside and higher strength. They are commonly used in high-performance vehicles and high-strength diesel engines.

　　In the field of heavy-duty diesel engines and marine engines, pure aluminum pistons are no longer able to meet the requirements due to extremely high explosion pressure. Ductile iron pistons and steel pistons have emerged. Steel pistons have higher high-temperature strength and fatigue resistance, especially suitable for heavy-duty truck diesel engines that meet the National VI/Euro VI emission standards. In addition, in order to balance lightweight and high strength, composite pistons have emerged, such as steel top aluminum skirts or steel top iron skirts. The piston top is subjected to high temperature and high pressure and is made of heat-resistant alloy steel; The skirt is guided by lightweight materials and connected by bolts, which is very common in large marine diesel engines.

　　-----------------JIAOZUO MAX POWER TECHNOLOGY CO., LTD