The purpose of combining mechanical vibration with lost foam casting technology is to solve the problems of coarse structure and low performance of lost foam casting cast iron alloy. The results show that the structure of cast iron alloy can be refined and the properties of cast iron can be improved by vibration lost foam casting when the process parameters of vibration lost foam casting are properly selected. The research method is feasible and has very important popularization and application value.
- The improvement effect and mechanism of vibration on shrinkage cavity, porosity and other defects in lost foam casting nodular cast iron and gray cast iron need to be further studied.
- Graphite morphology is one of the main factors affecting the properties of vermicular graphite cast iron. It is found that the graphite morphology of vermicular graphite cast iron in vibration lost foam casting changes from vermicular to vermicular fledgling or flake, and the mechanism involved will be further studied and revealed.
- Only the effects of vibration frequency, sample wall thickness and treatment temperature on the microstructure and properties of vermicular graphite cast iron in lost foam casting were studied. The amplitude is one of the key process parameters. Therefore, the effect of amplitude on the composition and properties of vermicular graphite cast iron in lost foam casting needs to be further studied; Moreover, the future research work also needs to carry out the lost foam casting of vermicular graphite cast iron under the coupling effect of various process parameters, and finally obtain the best process parameters of vibration solidification of vermicular graphite cast iron.
- Carbides formed during eutectic solidification of ordinary white cast iron are the main hard and brittle phases, which play a decisive role in the properties of white cast iron. Theoretically, vibration has a great influence on the primary austenite and eutectic structure in white cast iron. Therefore, the next work needs to systematically study the influence of vibration frequency and amplitude on the eutectic structure and properties in lost foam casting white cast iron.