Development of technology for the restoration of cast iron covers and pistons for marine diesel engines

Abstract

The development and application of modern technologies and equipment for the restoration of cast iron parts of marine diesel engines is an important area in ship repair. Due to the intensive use of marine diesel engines, their parts are subject to wear, corrosion, shock, and thermal loads. This can lead to a decrease in engine efficiency, loss of power, and a reduction in service life. However, replacing these parts with new ones is a costly and time-consuming procedure. Parts remanufacturing is a cost-effective solution, ensuring high quality of remanufactured components and conservation of resources. Modern remanufacturing technologies, including thermal spray, plasma spraying, and laser welding, ensure that parts are restored to their original shape and functionality. The technology of marine diesel engine parts remanufacturing helps to extend their service life, reduce maintenance costs and ensure efficient operation of vessels. Due to its relevance, this technology contributes to the reliability and efficiency of marine diesel engines in the maritime industry. Cast iron cylinder and piston covers are subject to a wide range of defects arising from the operation. To restore these critical parts, the Company identified methods for cold and hot welding of cast iron and developed a heating device to implement this technology. An electric furnace was designed and manufactured to prevent the appearance of cracks during hot welding of cast iron parts. The presented experiments of research and development of equipment allowed to development technological processes for the restoration of cast iron cylinder heads and pistons of marine diesel engines.