1. Gray cast iron: Most or all of the carbon in this cast iron exists in the form of flake graphite in a free state, its fracture is dark gray, has certain mechanical properties and good cutting performance, and is widely used in industry;

Improve the surface quality of scraping and grinding, take into account and check the shape and position error, and ensure the accuracy of the cast iron platform (the flatness of the cast iron plate should be below 0.01mm/500mm.

In order to make the cast iron machine tool work platform have the required mechanical, physical and chemical properties, in addition to the reasonable selection of materials and various forming processes, the tempering and aging treatment process is essential.

In order to prevent chemical sticking of sand, measures can be taken in the following two aspects:

Cast iron scribing plate installations are bracket installation, ground anchor installation, horn installation, and anchor bolt installation. The definition of scribing is that according to the requirements of the drawing

The cast iron platform is manufactured according to the standard of DIN876. The material is generally HT200--300, and there are also QT400-600 and ZG15-45.