Re: Tungsten Carbide/Cobalt/

Posted by Gordon England on August 28, 2003 at 20:51:36:

In Reply to: Re: Tungsten Carbide/Cobalt/ posted by Tony Globe on August 16, 2003 at 18:18:44:

: I have someone telling me they're using a component manufactured from Cobalt/Chrome bonded Tungsten Carbide (because there's an alkaline aqueous fluid involved and leaching of the Cobalt binder with conventional Cobalt-bonded TC has been a problem in the past). However,

: a) I've seen a spec. sheet for the component and it says Tungsten Carbide K30, which I thought was just TC & Cobalt,

: b) It's a completely TC component, not TC-coated, and I'm not sure if TC/Co/Cr can be pressed or if it's only be applied as a coating, and

: c) Our lab's got a Scanning Electron Microscope with EDX and elemental analysis of the component surface shows only Tungsten, Cobalt, Carbon & Oxygen (no Chrome).

: Could this still be TC with Cobalt/Chrome or is it just Cobalt-bonded TC?

Hi Tony

I believe K30 is 91% WC and 9% Co, with no Cr.

K701 WC with Cr and Co binder, also consider K801 WC with Ni binder. Both should give better corrosion resistance. Not sure how much wear and mechanical properties will be compromise though.

Regards Gordon

Follow Ups:

Surface Engineering Forum

Surface Engineering Message Board Archive

Surface Engineering Message Board Archive Index

Post A Message!

Gordon England Surface Engineering ForumPlease go to the new Surface Engineering Forum as this old message board is a read only archive. Please copy and paste relevant information or link to the page if you wish to reactivate a thread on the new forum.

Gordon England Independent Thermal Spray Coating Consultant
Telephone: +44 (0)1252 405186


Site Links


Nature of Thermal Spray Coatings

Surface Engineering in a Nutshell

Surface Engineering Forum

Thermal Spray Gun Repair Service

Plasma Consumable Parts

Thermal Spray Powder Supplies


Thermal Spray Coatings on Carbon and Glass Fibre Reinforced Polymers

HVOF Coating of Paper Making Roll

Abradable Coatings


Thermal Spray Processes:

Combustion Wire Thermal Spray Process

Combustion Powder Thermal Spray Process

Arc Wire Thermal Spray Process

Plasma Thermal Spray Process

HVOF Thermal Spray Process

HVAF Thermal Spray Process

Detonation Thermal Spray Process

Plasma Flame Theory

Cold Spray Coating Process

Wear and Use of Thermal Spray Coatings

Corrosion and Use of Thermal Spray Coatings

Glossary of Thermal Spray and Surface Engineering Terms

Image Directory for Thermal Spray Coatings

Plasma Gas Flow Information

Plasma Gas Flow Correction Calculator

Contact Form

Links to other interesting sites related to thermal spray and surface engineering

Reciprocal Links

Periodic Table of the Elements

SI Units

Calculators for Conversion between Units of Measurement

Hardness Testing

Surface Engineering Message Board Archive

Surface Engineering Message Board Archive Index

Photography Gallery2

Photography Gallery3

© Copyright Gordon England