AMT offers comprehensive reconditioning of mould copper plates including high quality nickel and nickel alloy coatings.
The nickel & nickel alloy coatings can be also applied to narrow face plates. A narrow face mould plate coated with HN20, HN40 or HNK2 offers much better wear resistance than a plate without coating.
The HN 40 nickel alloy has twice the hardness of HN 20, which leads to considerable improvement in mould life. Both types of coating can be applied in greater thickness so that they can be re machined.
The rate of wear can be reduced considerably by way of coating the edges of the adjustable narrow-face plates, which slide on the inside (hot face) of the wide-face coppers, with a material that has greater hardness.
It can be seen that very complex inter relationships have to be taken into account when selecting a suitable coating and layer thickness. Recommendations can be made in relation to specific system and casting parameters. Close consultation between the system operator and the mould supplier is necessary to ensure that the appropriate coating systems are selected.
Properties |
HN 20 |
HN 40 |
HN K2 |
Chemical Composition |
Ni |
Ni – Co |
Co – Ni |
Process |
Galvanic |
Galvanic |
Galvanic |
Hardness (Min) in HV |
220 |
400 |
250 |
Thermal Conductivity in W/(m·K) |
90 |
80 |
90 |
Thickness in mm |
< 7 |
<3 |
<3 |