Catalog

Diamond-Like Carbon Coatings (DLC)

Diamond-like carbon is an amorphous carbon material with predominantly tetrahedral carbon bonds. Has some properties of diamond.

Description

DLC is an amorphous thin film consisting of a carbon-containing diamond SP3 structure bond and a graphite SP2 atomic structure bond. It has properties similar to diamond: high hardness and good corrosion resistance. At the same time, it has the characteristics of graphite, which provides a very low coefficient of friction. The material is ideal as a coating for sliding parts to reduce friction.

Thin DLC piston rings exhibit good self-lubrication under various conditions. DLC coated piston rings exhibit superior thermal resistance compared to traditional coatings. The use of a low friction coating on the oil rings also improves the tribological characteristics of the cylinder-piston group. When using a DLC-coated ring in conjunction with an oil scraper ring, friction losses are reduced by approximately 2%.

The structure of the piston ring with DLC (Diamond-Like Carbon) coating

1 — DLC Coating

2 — Chrome Layer

3 — Nitrided Layer

4 — Base Material

Cross-section of the material under an electron microscope
Research Results

Advantages

  • Low Friction Coefficient
  • High Hardness
  • Wear Resistance
  • Excellent Corrosion Resistance
  • 2-5% Reduction in Fuel and Oil Consumption
  • Extended Engine Lifespan
  • Low Emissions Throughout the Engine's Service Life

WELLFAR piston rings with DLC coating assortment

WELLFAR part number
OEM-number
Brand
68 31 92
DAF/BOVA
1819532
DAF/BOVA
1873904
DAF/BOVA
2996143
IVECO
61316996
IVECO/ASTRA
61316996
IVECO/ASTRA
1907470
IVECO/ASTRA
2992157
IVECO/ASTRA
2991781
IVECO/ASTRA
51 02503 7007
MAN
51025030806
MAN
51025030893
MAN
51 02503 7003
MAN
51 02503 0827
MAN
21304975
MAZ
A64690300124
MERCEDES-BENZ
A64690300124
MERCEDES-BENZ
A906 037 10 16
MERCEDES-BENZ
A460 030 03 24
MERCEDES-BENZ
68 31 92
MERCEDES-BENZ
5001823201
MERCEDES-BENZ
A407 030 00 24
MERCEDES-BENZ
A5410300624
MERCEDES-BENZ
5010477821
RVI
7425126160
RVI
5001014518
RVI
550255
SCANIA
550248
SCANIA
2558611
SCANIA
551377
SCANIA
275 603
VOLVO
276945
VOLVO
7420509932
VOLVO/RVI
7421253763
VOLVO/RVI

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