Material: cast iron plate with HT200-300 casting, material ingredients when the raw material content plus ingredients as follows (%): carbon content: 3.1-3.4, manganese: 0.6-0.9, silicon: 1.5-2.0, sulfur <0.12, 0.3. Hardness> 180, secondary tempering treatment.

Cast iron plate It is specially designed for the leveling of large equipment. It has the characteristics of reasonable design, stable structure, high precision and wear resistance. It can realize the flat stitching of 3000mm-6000mm. The product is made by scraping or grinding. Processing, tool shop, machine (inspection) repair shop, large equipment base, measuring room and precision machining inspection, measurement and grinding, and can accurately measure, check the workpiece flatness, flatness and angle tolerance value The

Cast iron platform technical requirements:

1, the platform must be twice after the stress stress aging treatment to prevent the deformation of the stress memory distortion and the future use of the platform in the occurrence of cracks in the phenomenon of elimination of casting stress, roughing the purpose of stress, stress relief of more than 90%

2, the face of processing at the end of sharp angle;

3, casting the external surface of the rough surface to be tired, polished, the inner surface are required to apply anti-rust paint;

4, flat face can not have a serious impact on the appearance and performance of sand holes, stomata, cracks, slag, shrink loose, scratches, bumps, rust and other defects.

3, the precision level of 0 to 3 on the flat face, the diameter of less than 15mm sand hole allows the same material to block, the hardness should be less than the same material hardness of the face of the sand hole should be no more than 4 And the distance between the sand holes should be not less than 80mm.

4, the plate should be used high-quality fine gray cast iron or alloy cast iron and other materials, the face hardness should be 170 ~ 220HB.

5, flat face is usually used in the use of scraping processing. For the use of scraping the processing level of the three flat face, the surface roughness Ra maximum allowable value of 5 ч m.

7, flat face with scraping process should be carried out on the color of the test. The post-show contact area ratio shown in Table 3, or by 25mm × 25mm in the contact points should not be greater than 5 points. Controversial, according to the ratio of contact area for the assessment basis.

8, flat on the two sides, there should be installed handle or ring device screw hole (or cylindrical hole), and the device location should be designed to minimize the deformation caused by handling.

9, if the flat face set on the working hole (or groove), the location should not be higher than the face.

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