Cast iron surface plate is an indispensable basic tool in mechanical manufacturing, and often used for various inspection tasks. Cast iron surface plate can be used for machine tool mechanical assembly, inspection and measurement benchmarks, inspection of the dimensional accuracy or behavior deviation of parts, and for precision welding, and marking. However, the cast iron surface plate is prone to shrinkage porosity on the surface of the casting, so how should we deal with them?

 

 

1. The cast iron surface plate can be subjected to annealing treatment to eliminate looseness in the casting;

The cast iron surface plate has been manually annealed twice and has the characteristics of high temperature resistance. Stress relief annealing is also called low temperature annealing. This annealing is mainly used to eliminate residual stress in castings, forgings, welded parts, hot rolled parts, cold drawn parts, etc. It will cause the casting to deform or crack during the cutting process if these stresses are not eliminated.

 

2. Welding repair of cast iron surface plate, dig out the metal in the defective area, weld the defective area with the same or compatible electrode as the plate metal, repair the defective area after welding, and perform post-weld heat treatment.

 

3. For cast iron surface plate under liquid or gas pressure, partial or overall impregnation treatment can be carried out to improve the sealing performance of the castings.

 

For example, the cast iron welding platform is used for the basic plate of the riveting process. There are holes and T-slots on the working surface, and the holes are mainly used to clean parts. There are also flat welding plates/surface plates, that is, no holes and no grooves. Therefore, if the welding platform is deformed, it will cause inaccuracy in mechanical measurement or inspection, so the maintenance of the cast iron surface plate is very important.

 

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