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Application Processes

NOTE: The processes discussed below are a non partisan overview of the technology involved. This is intended to be a process awareness tool. SPRS will welcome any inquiry concerning a specific process as well as potential supply of overlay material for these processes.


Oxy-acetylene torch process:

This process is quite often considered as “old fashioned”, and even qualified as “antiquated” because of its lack of apparent sophistication. And yet, it is the most effective application process for tungsten carbide based products. These products are always dual phased: matrix and tungsten carbides. One phase, the matrix, melts at a temperature much lower than the other phase, the tungsten carbides themselves. 

Advantages of this process:


Drawback of this process:

 



Electric arc process:

The electric arc process is more familiar to professional welders. It is relatively easy to achieve an acceptable part by following the instructions on the products packaging.

Advantages of this process:


Drawback of this process:

 



H.V.O.F. process:

The High Velocity Oxy Fuel process involves projecting at high speed a product, which can include tungsten carbide particles, against a surface to be overlayed. The product is fused during the travel distance between the projection apparatus and the surface to be overlayed.

Advantages of this process:


Drawbacks of this process:

 



P.T.A. process:

The Plasma Transferred Arc process involves creating a flow of inert gas, brought electrically to a very high temperature (plasma) as a heat source to fuse and bond a metal based product (which can include tungsten carbide particles ) onto iron or steel parts. 

Oddly enough, this is often considered as a product, and not as a process. Manufacturing specifications should include the process and the product to be applied by this process.

Advantages of this process:


Drawbacks of this process:

 



LASER process:

This newer technology uses the energy of a laser beam to fuse and bond a product in powder form, onto a base material.

Advantages of this process:


Drawbacks of this process: