(PTA) PLASMA TRANSFERRED ARC
 
PTA SOLVES INTENSE INDUSTRIAL WEAR PROBLEMS
There is a steadily growing demand from all branches of industry for longer service life for their machinery, and for the adaptation of that machinery to meet the specific conditions of their production processes. Part of the response to these demands has been the development of some highly sophisticated surface coating techniques. The most advanced of these are the plasma processes, particularly suitable for very precise anti-wear protection of parts.

It is in this context that A & A Co., Inc. has installed a sophisticated Plasma Transferred Arc System (PTA), a high energy, inert gas welding process. It produces a very high quality deposit offering optimal protection with minimal dilution or deformation of the base material.

It is a process that deposits very precise coatings of perfectly controlled alloys on mechanical parts that are subject to intense wear, significantly extending their service life.It is particularly effective in protection against corrosion, thermal shock and abrasion.

P.T.A. DEPOSITS SHOW THE FOLLOWING CHARACTERISTICS:

1. An attractive bead with no signs of oxidation, and with little or no ripple.
2. Very low dilution - in fact the lowest level of dilution obtainable by electric arc welding.
3. High, density, no porosity & no inclusions.
4. Microphotos or x-rays show the deposits to be of high density & metallurgically bonded to the Substrate.

A & A Co., Inc. will evaluate your part to determine which process and which coating is best for your application.

 

HARD SURFACING - the Answer to Wear & Corrosion  
The gun used for Hard Surfacing is the same as described in the section "Metallizing".
The difference is in the powders which are sprayed. The powders sprayed for Hard Surfacing are basically compositions of Ni, Cr, Co, Bo, Fe, W and WC in varying blends.
They are applied onto the Substrate in the same manner as Powder Metallizing; but after the coating has been sprayed to a pre-determined thickness, an Oxygen-Acetylene torch is used to heat the part up to approximately 2000°F. fusing the coating within itself and to the Substrate, thereby achieving a true Metallurgical Bond. With this process, coatings can be applied with hardnesses up to Rc 80. Hard materials can also be applied with the Plasma and Wire Metallizing processes.

HARD SURFACE COATINGS ARE BEST USED IN AREAS
WHERE THERE IS - IMPACT - HIGH ABRASION - CORROSION