The new production of a worn component is often expensive and time-consuming, especially due to the downtime of machines. The high-quality and time-saving Regeneration of components is the ideal alternative to a costly new acquisition.
Repair hard chrome plating
In the event of signs of wear or damage, our individual surface treatment enables us to offer high-quality repair solutions that can be implemented at short notice. The components are inspected by our quality management department, stripped, ground clean (e.g. if there are signs of wear on pivots), hard chrome-plated and finally ground to the original dimensions. To enable you to make a well-founded decision between a new purchase or repair of the components, you will of course receive an itemized quotation.
Shrunk bearing seats, winding mandrels, pistons, piston rods, piston rods, spindles, drive cylinders, turbine rotors, planetary rings and many other machine components are suitable for repair hard chrome plating. We have also been successfully using our know-how for the Regeneration of extrusion screws for a long time.
In the case of minor damage, smaller spots can be repaired by using tampon electroplating (Selectron). Here you can find further information about Selectron.
Properties of your components
- Basic material: all steels
- Vertical chrome plating: ⌀ 1300 x 4700 mm or 8000 mm with rotation of the workpiece
- Horizontal chrome plating: ⌀ 60 x 6500 mm
- Forms: 1700 x 1500 x 1300 mm
- Weight: 5000 kg
Coating properties of hard chrome
- Layer thickness: 0.003 to 0.500 mm with warranty (beyond that without)
- Roughness: Rmax < 0.1 μm to Rz 70 μm
- Hardness: 1000 ± 50 HV 0.1
- Corrosion resistance Base material according to DIN EN ISO 9227-NSS: > 480 hours with MHC
- Expansion coefficient: 6.6 to 8.4 x 10-6 1/K
- Ductility: 0.1% elongation at break
- Wear resistance: < 5 mg/1000 revolutions
- Coefficient of friction: 0.15 lubricated or 0.21 dry against steel
- Tensile strength: 280 to 450 N/mm²
- Lead and cadmium free (RoHS compliant)
Various useful properties of the hard chromium coating combined provide the high wear resistance. On the one hand, the hard chrome layer is very hard without distorting the material. The low friction coefficient confirms the anti-adhesive properties of the chrome layer. This refers to the behavior of chrome surfaces to repel aqueous media and dirt. This ability also increases the corrosion resistance of hard chrome surfaces.
A further advantage is the micro-cracked structure of the hard chrome layer, which absorbs applied lubricants well for wear protection. The fine network of cracks also increases the ductility of the chrome layer, making it less brittle in relation to its high hardness.
Components coated with hard chrome are free of lead and cadmium according to the RoHS and WEEE directives. Accordingly, they can be used in the food industry without any problems.
Tips for the delivery of your components
The delivery condition of the components is one of the decisive factors for optimum coating quality and a short throughput time. Here you will find helpful tips for the delivery of your components.
Betz-Chrom – your partner for strong parts
In the spirit of a trustful partnership, you will receive highly qualified technical advice from us that is tailored to your needs. We combine over 65 years of experience in surface technology with an innovative and inquisitive corporate culture. Our quality awareness and our commitment to the environment is TÜV-approved and certified according to DIN EN ISO 9001:2015 as well as DIN EN ISO 50001: 2018 and DIN EN ISO 14001:2015. As an on-schedule partner with high quality standards, we constantly aim to find the optimal process solution for you.
This post is also available in: German