By studying the changes of casting properties, metallographic structure and mechanical properties of low carbon equivalent grey cast iron under the action of rare earth, this paper discusses the action mechanism of rare earth elements on low carbon equivalent grey cast iron, and grasps the relationship between the amount of rare earth and the composition, structure and properties of low carbon equivalent grey cast iron, A new method that can optimize the microstructure and properties of low carbon equivalent gray cast iron is found, which provides a relevant theoretical basis for the application of rare earth in the production of low carbon equivalent gray cast iron, and lays an experimental foundation for the production process of low carbon equivalent gray cast iron inoculated with rare earth.
- Effect of rare earth on casting properties of low carbon equivalent gray cast iron. The effects of rare earth on fluidity, shrinkage and white mouth tendency were studied by casting performance test.
- Effect of rare earth on mechanical properties of low carbon equivalent gray cast iron. The effects of rare earth on the tensile strength and hardness of low carbon equivalent gray cast iron were studied by mechanical property test.
- Effect of rare earth on metallographic structure of low carbon equivalent gray cast iron. The effects of rare earth on the graphite structure and matrix structure of low carbon equivalent gray cast iron were studied by metallographic observation.
- Effect of rare earth on crystallization process of low carbon equivalent gray cast iron. Through thermal analysis and testing, the crystallization characteristics and crystal structure changes of low carbon equivalent gray cast iron with different rare earth additions were studied.
- Based on the above research results, find out the effective ways and methods to improve the comprehensive properties of low carbon equivalent gray cast iron.