Tungsten carbide coatings on steel

Conference · Wed Jan 01 04:00:00 EST 1975

OSTI ID:4073524

Archer, N J; Blocher, Jr, J M; Hintermann, H E; Hall, L H ^[1]

---

1. eds.

It has been shown that tungsten carbide is deposited exclusively in the form W$sub 2$C from the gas phase by the reaction between tungsten hexafluoride, hydrogen and an aromatic hydrocarbon, such as benzene, in the temperature range 400-700$sup 0$C. Coherent layers of W$sub 2$C with thickness up to 100$mu$m and hardness of about 2300 V.P.N. can be obtained. The coatings have been shown to have low porosity with columnar grains growing perpendicular to substrate surface. Good adhesion to steel substrates is obtained by the use of a thin nickel interlayer. The relatively low deposition temperature makes it possible to coat tool steels without annealing them. This, combined with the possibility of coating thickness which can be ground or polished to a precise final size and surface finish, makes tungsten carbide very suitable for wear-resistant applications on high-precision components. (auth)

• Research Organization: Fulmer Research Inst., Buckinghamshire, Eng.
• NSA Number: NSA-33-015217
• OSTI ID: 4073524
• Country of Publication: United States
• Language: English

Related Subjects

*TUNGSTEN CARBIDES-- CHEMICAL VAPOR DEPOSITION
360201* --Materials--Ceramics
Cermets & Refractories-- Preparation & Fabrication
ADHESION
LAYERS
N50120* --Metals
Ceramics
& Other Materials--Ceramics & Cermets--Preparation & Fabrication
NICKEL
POROSITY
STEELS
SURFACE COATING
TOOLS
VICKERS HARDNESS
WEAR RESISTANCE