The picture shows the microstructure of white cast iron in lost foam casting with and without vibration. It can be seen from the figure that in the lost foam casting white cast iron without vibration, the grain size of primary austenite is relatively large and its content is small. According to the software statistics, the content of primary austenite in the white cast iron obtained by this process is about.

However, in the white cast iron prepared with the vibration frequency of 35Hz, the content of primary austenite is more and the austenite grain size is smaller, which is about 55.1%. Compared with lost foam casting white cast iron without vibration, it increased by 47.33%.