AEROSPACE

surface technology for safe flying

Our production line for the aerospace industry with the processing steps blasting, fixture construction, hard chrome, heat treatment, grinding and preservation guarantees a reliable production process as well as complete documentation.

Hard chrome: coating for safety-relevant components

Hard chrome coatings provide the necessary corrosion and wear protection to meet the requirements of safety-relevant components. The many years of experience of our qualified specialists in the aviation sector guarantee continuous and impeccable quality. Conscientious and precise work is required in the aviation sector, as is the complete documentation of individual process steps. Our electrolytes of the hard chrome process of the aerospace production line are spatially separated from the conventional hard chrome plating. The production line, specifically designed for the aerospace industry, is exclusively supervised by skilled workers and master craftsmen.

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Properties of the hard chrome layer

  • Layer thickness: 0.003 bis 0.500 mm
  • Hardness: > 850 HV 0.1
  • Roughness: Rmax < 0.1 μm bis Rz 70 μm
  • Lead and cadmium free (RoHS compliant)

Aerospace standard: we are meeting the requirements

Within the scope of the auditing of our process by our aerospace customers on the basis of the respective aerospace standards (e.g. LN 29 748, AMS-QQ-C-320, LAT 4-3200), we receive the corresponding approval for the processing of the components. Accompanying production, we carry out adhesion, embrittlement (e.g. LAT 4-3202) and corrosion tests on replicate samples at regular intervals. The composition of the electrolyte of our hard chrome process of the aerospace production line corresponds to the aerospace standard.

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Properties of your components

  • Subject to aerospace standards e.g. LN 29 748, LN 9368, AMS-QQ-C-320, AMS 2460, LAT 4-3200
  • Dimensions: ⌀ 180 x 700 mm
  • Weight: 500 kg

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Further processes of our production line Aerospace

Blasting

Defined glass bead blasting (cleaning blasting) is of great importance for the component spectrum of aviation. The blasting process represents a pore-deep cleaning of scaled, oxidized or nitrided surfaces, that leads to an improvement in adhesion. A metallically pure surface is the basic prerequisite for optimum adhesion of the deposited hard chrome layer. Accordingly, the quality of the blasting is a decisive factor for the surface quality of the coating. The blasting material selected of course complies with the respective requirements, e.g. Quality V 180. Find more about blasting.

Heat treatment

Heat treatment (tempering) serves as a preventive measure with regard to the resistance of high-strength steel components to hydrogen-induced brittle fracture based on DIN 50969. The background is that during the coating process a co-deposition of hydrogen occurs. This can lead to hydrogen embrittlement, which can cause a fracture of the component when subjected to subsequent stress. To prevent this, the component is tempered in a furnace right after the chromium plating in order to deprive the absorbed hydrogen. The surface properties change very little in the process. It should be noted that the gas tightness of the layer also rises with increasing layer thickness.

The temperature profile and the treatment time of the tempering batches are conscientiously recorded in order to ensure the traceability of components according to the requirements. Our heat treatment process fulfils e.g. the standards AMS 2759/9B, LAT 7-4800, DIN 50969.

Grinding

In our grinding centre, we use modern CNC technology to produce a wide variety of contours with high precision and quality. The technical application determines which surface properties must be fulfilled. We carry out precision grinding with the required diameters, form and position tolerances and the desired surface quality. With our know-how we implement your specification of the surface structure. Find more about precision grinding.

Preservation

As an additional corrosion protection after coating we preserve your components with Androx 3961 (PX 24). This is a mixture of surfactants, corrosion inhibitors and oil. The thin oil film bestows a good corrosion protection due to the water displacing properties.

Our core processes

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Electroless nickel

For hardness, wear resistance and very high corrosion protection with even layer thickness distribution.

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Hard chrome

For corrosion protection, tribological properties and a particularly high wear resistance against mechanical stress.

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Precision grinding

For dimensional accuracy, roughness depth and bearing ratio depending on the requested surface quality.

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.

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