Re: JK powders


Posted by Gordon England on October 12, 2003 at 01:35:31:

In Reply to: JK powders posted by Joe on October 11, 2003 at 02:10:41:

: Hello Mr. Gordon, it's Joe again. We have been applying JK 112 to some shafts using a plasma unit. The coating are coming out soft. I am not the operator of the unit, I mainly do spray and fuse coatings or Jet Kote, don't know the actual hardness of the finished product, the grinder operators say the coatings are soft. The powder size is 325D. My question, is it possible to spray the WC coatings with Plasma? Do we just need a different size powder? Is Plasma just superior for ceramics? I'm trying to learn all I can and you seem like the one to ask. Thanks, Joe

Hi Joe

Yes, tungsten carbide coatings can be applied using plasma spray and this method was the main way of applying them until HVOF arrived.

JK112 is primarily for HVOF use, but with careful selection of parameters, should produce reasonable coatings with plasma.

HVOF will generally provide much superior carbide coatings. Plasma can produce good coatings, but can be very technique dependent and requires very precise settings. If you are not using carefully optimised plasma parameters for JK112 I'm not surprised you are having problems. Use a powder graded for plasma spray with well established parameters for your equipment or preferably use your HVOF process.

Regards Gordon


Follow Ups:


Surface Engineering Forum

Surface Engineering Message Board Archive

Surface Engineering Message Board Archive Index

www.gordonengland.co.uk







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

Email: tsc@gordonengland.co.uk

Site Links



Introducing

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

Applications:

Thermal Spray Coatings on Carbon and Glass Fibre Reinforced Polymers

HVOF Coating of Paper Making Roll

Abradable Coatings

Photomicrographs

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