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Nickel plating for metallurgical protection

Steel alloy elements (Zn,Pb,Cd,S) attack copper surface in meniscus area and causing cracks. On the other side, slabs quality is impacted by copper picked up from copper moulds, what may be the reason of star cracks arise. This problem usually occurs by casting certain steel grades, for instance shipbuilding qualities.


Nickel plating for anti-wear protection

Mould plates are produces from different types of copper alloys. Copper alloys themselves offer relatively low wear resistance. Nickel layer applied on copper, because of higher hardness, offers higher wear resistance. By adjustable mould, friction between surfaces of wide-face copper walls and edges of narrow copper walls, leads to wear and formation of deep scores and scratches. Casting powder of steel particles getting into the resulted gap between sliding surfaces deteriorate the situation. It is well known, that contact between copper and nickel is significantly better than contact between copper and copper surfaces, from the point of view of friction properties.


Ways of nickel plating

Generally two ways of nickel plating are used

  • Nickel plating of dismantled copper plate from cooling box
  • Nickel plating with mould frame (cooling box)


Copper plating

Modern copper plating technology for the thick copper layer deposit offers unique refurbishment opportunity for the worn out sides of the narrow plates. In moulds, which undergo width changes during casting process, the wear of the narrow plate sides is significant. This type of wear represents the limit for the overall lifetime of the narrow plates (for the mould undergo width changes during casting only). Copper plating enable restoring of the original narrow plate width. Galvanic Service technology offers copper layers depositing up to 10 mm thickness.


Machining

Machining before and after plating processes consists of milling and grinding. Both operations are performed on the CNC controlled milling machines. These machines are equiped with the measurement device for the precise plate wear measurement, which enables machining process optimization and consecutively the minimum removal of the mould plate material.

Clamping area:

  • CNC1 1300x3000 mm
  • CNC2 1095x4200 mm