Plasmaforum A discussion platform for users, scientists and other people interested in PLASMA SURFACE TECHNIQUE

Posted by David on September 01, 2003 at 16:17:06:

In Reply to: Re: Re: White Layer posted by Aranguren on August 28, 2003 at 08:44:43:

Yes Plasma nitriding is more expensive in the ratio of cost in relation to mass. Hoever whilst the system is being amortized over say 5 years, then the cost per unit is about 10% more expesive (depending of course how the unit is loaded and utilized). The big plus for plasma nitriding, is that the process (floor to floor) can be faster by up to approximatly 50% therefore the productivity is much greater.The metallurgical results are much more repeatable and stable. The operating costs are absolutly negligable.For gas nitriding with 100 square feet of surface area, one would require an approximate flow rate of ammonia of approximatly 50 Cubic Feet per hour. This has then has to be exhausted and neutralized. With the same surface area, the flow rate of nitrogen and hydrogen is approximatly 2 to 4 % of that volume plus no scrubbing or eflluent problems. Another advantage is that, one loaded the operator only has to initiate the program and walk away. (being utilized on other duties)
A gas nitride furnace is considerably less expensive that a plasma nitride system without any doubt given size for size. The major cost factors in the plasma nitride unit are the vacuum system, the pulsed power pack and the control. However the benifts are graeater than with gas. Plus if the unit is amortized over 5 years say, the operating costs then are almost negligable. There is no obnoxious smell of ammonia, therefore the system can be fitted into cell manufacture. I consult for a client on gear manufacture who is prohibited from using gas nitriding and has to use plasma. His comments are that the has better performance and metallurgy from plasma nitirided gears. He produces gears for the aerospace industry with high torque conditions, fast start, fast stop. Please visit our web page at www.pyemet.com We are a company specializing in heat treat and metallurgical consulting
Best Regards to you,
David

Follow Ups:

Post a Followup

Name:
E-Mail:
Subject:	Re: Re: Re: Re: White Layer
Comments: : Yes Plasma nitriding is more expensive in the ratio of cost in relation to mass. Hoever whilst the system is being amortized over say 5 years, then the cost per unit is about 10% more expesive (depending of course how the unit is loaded and utilized). The big plus for plasma nitriding, is that the process (floor to floor) can be faster by up to approximatly 50% therefore the productivity is much greater.The metallurgical results are much more repeatable and stable. The operating costs are absolutly negligable.For gas nitriding with 100 square feet of surface area, one would require an approximate flow rate of ammonia of approximatly 50 Cubic Feet per hour. This has then has to be exhausted and neutralized. With the same surface area, the flow rate of nitrogen and hydrogen is approximatly 2 to 4 % of that volume plus no scrubbing or eflluent problems. Another advantage is that, one loaded the operator only has to initiate the program and walk away. (being utilized on other duties) : A gas nitride furnace is considerably less expensive that a plasma nitride system without any doubt given size for size. The major cost factors in the plasma nitride unit are the vacuum system, the pulsed power pack and the control. However the benifts are graeater than with gas. Plus if the unit is amortized over 5 years say, the operating costs then are almost negligable. There is no obnoxious smell of ammonia, therefore the system can be fitted into cell manufacture. I consult for a client on gear manufacture who is prohibited from using gas nitriding and has to use plasma. His comments are that the has better performance and metallurgy from plasma nitirided gears. He produces gears for the aerospace industry with high torque conditions, fast start, fast stop. Please visit our web page at www.pyemet.com We are a company specializing in heat treat and metallurgical consulting : Best Regards to you, : David
Optional Link URL:
Link Title:
For security reasons, please enter the displayed code into the textfield.

---

[ Follow Ups ] [ Post a Followup ] [ Plasmaforum ! ] [ FAQ ]