Heat treatment and coating
Heat treatment and coating are carried out by approved suppliers under our quality system — and inspected in our laboratory before the part continues.
- Case hardening · vacuum nitriding
- Alodine · Mn and Zn phosphate
- Incoming inspection in-house
We say this plainly
Heat treatment, coating and painting are not done in our plant; they run at approved suppliers audited under our quality system. We set the process parameters and verify the returning parts in our own laboratory.
Heat treatment
| Process | Effect | Typical use |
|---|---|---|
| Case hardening (carburising) | Hard surface, tough core | Gears, shafts, splined components |
| Vacuum nitriding | Hard, wear-resistant surface with minimal distortion | Precision parts where dimensional stability after treatment matters |
Surface coating
| Process | Effect | Typical use |
|---|---|---|
| Alodine (chromate conversion) | Corrosion resistance on light metals, retains conductivity | Aluminium components |
| Manganese phosphate | High wear resistance, oil retention | Sliding and load-bearing steel parts |
| Zinc phosphate | General corrosion protection, paint base | Broad industrial use |
| Painting | Corrosion protection, colour to customer specification | Housings and frames |
Incoming inspection after external processing
- Hardness on a KB Prüftechnik automatic tester (Rockwell, Brinell and Vickers scales)
- Dimensional recovery and distortion on the CMM
- Coating thickness on a dedicated gauge
- Surface roughness
- Material composition by spectrometer where required
Forging and casting
Forged and cast blanks are sourced from approved suppliers and enter the same incoming inspection before machining.
Frequently asked questions
Do you do heat treatment in-house?
No. Case hardening and vacuum nitriding run at approved suppliers under our quality system. We specify the parameters, and we measure hardness, case depth and distortion on return.
Can you supply coated parts ready to assemble?
Yes. Alodine, manganese phosphate, zinc phosphate and painting are routed through approved suppliers; parts return to us for inspection, assembly and packing.
Who is responsible if an external process fails?
We are. The approved supplier works to our specification; non-conforming results are caught in our incoming inspection and handled under our quality system.
Summary
- Heat treatment (case hardening, vacuum nitriding) via approved suppliers.
- Coatings: alodine, manganese phosphate, zinc phosphate, painting — via approved suppliers.
- Process parameters specified by Yağmaksan; results verified in our laboratory on return.
- Forged and cast blanks from approved suppliers with incoming inspection.
Last updated:
Related pages
- Capabilities
Gear manufacturing
CNC hobbing to Ø260 mm and module 6, shaping and broaching, blanks turned in-house.
- Quality
Inspection and documentation
First-article reports, material certificates and batch traceability.
- Quality
Materials
Steels, duplex and super duplex stainless, aluminium, copper alloys and engineering plastics.
Send us your drawing.
STEP, IGES, DXF or PDF. Quotation within 2–15 business days, depending on size and complexity.