Aiming at the problems of coarse structure and low mechanical properties of cast iron alloy lost foam casting, vibration lost foam casting and inoculation treatment were applied to cast iron alloy in order to reduce the developed dendrite and refine the grain size of cast iron alloy; At the same time, the morphology, distribution and evolution of graphite in lost foam casting cast iron alloy were studied to improve the mechanical properties of lost foam casting cast iron alloy castings. The effect mechanism of vibration on the microstructure and properties of lost foam casting cast iron alloy is analyzed theoretically, which lays a theoretical and technical foundation for the development of lost foam casting technology and the popularization and application of the new technology of vibration lost foam casting of cast iron alloy.
- The effects of process parameters such as the amount of nodulizer, the treatment temperature of molten iron and the wall thickness of samples on the microstructure of ductile iron in lost foam casting were studied to lay a foundation for the determination of subsequent process parameters.
- Study the influence of mechanical vibration parameters (vibration frequency and amplitude) on eutectic graphite and matrix structure of lost foam casting nodular cast iron, explore the change characteristics of mechanical properties of lost foam casting nodular cast iron under vibration, analyze the mechanism of vibration strengthening of nodular cast iron, and lay a theoretical foundation for the application of vibration loss casting technology in the actual production of nodular cast iron.
- Study the influence of mechanical vibration parameters (vibration frequency and amplitude) on graphite morphology and primary austenite of lost foam casting gray cast iron, explore the change characteristics of mechanical properties of lost foam casting gray cast iron under vibration, and analyze the action mechanism of vibration on lost foam casting gray cast iron, so as to lay a theoretical foundation for the practical application of vibration lost foam casting Technology in gray cast iron.
- Study the influence of vibration frequency on graphite morphology of vermicular graphite cast iron, explore the evolution law of graphite morphology of vermicular graphite cast iron in lost foam casting by vibration, analyze the mechanism of graphite morphology evolution of vermicular graphite cast iron in lost foam casting under vibration, and study the feasibility of controlling graphite morphology of vermicular graphite cast iron by vibration solidification technology.
- The effect of vibration on primary austenite and matrix structure of lost foam casting white cast iron was studied, and the effect of vibration on microstructure transformation and properties of white cast iron was analyzed.