Stellite Welding as a metal is extremely strong, which makes machining difficult and increases lead times and costs. Using the HVOF method we can give components that have Stellite 6 attributes without this cost. https://www.gemsons.com/5-benefits-of-stellite-welding-in-machining/

1. Advantages of UV Roll to Roll Printer
5 Benefits of Stellite Welding In Machining

2. Introduction
❖ Stellites exhibit exceptional resistance to corrosion, oxidation; wear
resistance, heat resistance, and low magnetic permeability.
❖ In highly corrosive conditions, components made from Stellites perform well
and retain these advantageous properties at elevated temperatures.
❖ Stellite alloys are a Cobalt-Chromium super alloys family composed of
complex carbides.
❖ These are non-magnetic and give a high wear resistance standard, and are
especially effective in providing chemical resistance for stellite welding.
❖ Stellite alloys are used as the base material, but the disadvantages of this are
the high material and machining costs.

3. Introduction
❖ As such it has been adopted as a welding medium, but this method is
unsuitable for components that may experience Thermal Distortion, and as
such HVOF has been developed as a way to obtain Stellite’s properties without
the cost.
❖ The key benefits of stellite welding in machining coatings applied with HVOF
are that the process does not change the properties of the base material which
may occur during welding.
❖ Even the process can be conducted on a broader variety of base materials and
is more robust. Other benefits include;

4. Hardness
❖ Stellite as a metal is extremely strong, which makes machining difficult and
increases lead times and costs.
❖ Using the HVOF method we can give components that have Stellite 6 attributes
without this cost.
Corrosion Resistance
❖ Stellite welding provides excellent resistance to corrosion.
❖ This is due to the inherent characteristics of the hard carbide phase dispersed
in an alloy matrix which allows Stellite coatings even at high temperatures to
retain their corrosion resistance properties.
❖ Stellite similar to stainless steels corrodes mainly through a pitting process
and not by a general loss of mass in solutions to seawater and chloride.

5. ❖ Stellite is the industry standard for most wear resistance for general purposes.
❖ There are several ways of mechanical damage to this. Stellite coatings have a
high hardness of up to 500 ° C. Stellite would also have strong impact
resistance and erosion in the cavitation.
Alternative Welding
❖ Components are also hard-faced by the welding process with Stellite.
❖ The downside of this method is that the Stellite layer will often break as
temperature changes occur and would not occur with sprayed Stellite.
❖ Even, HVOF can be performed without fear of thermal distortion.
Wear Resistance

6. ❖ Stellite has a wide variety of applications but is most common with our valve
customers, where it is mostly used as a substitute for Electroless Nickel
Plating where it is difficult to achieve the same degree of hardness and
corrosion resistance.
❖ It is also used for machines in a variety of movable sections.
❖ Stellite alloys are manufactured through several different processes or
methods, including wrought or hot forging, hard-faced coating, powder
metal, and casting depending on the final appliance.
❖ Machining and stellite welding is more difficult and thus requires high-
performance processing equipment and advanced machining devices.
Applications

7. Applications
❖ Stellite is mostly machined by grinding rather than cutting, because of its extreme
durability.
❖ Stellite is the material of choice in industrial process valves and valve seats for some
interior parts.
❖ This has also been used in the construction of lathes turning machines.
❖ Stellite machining was used as the cage material for the first commercial prosthetic
heart valve and is commonly used to produce the dental prosthesis cast structure.
❖ Stellite alloys are difficult to process, and because of the cobalt and chromium content,
they appear to have exceptionally high melting points.
❖ Stellite welding is usually done by grinding, as opposed to cutting, and sections are cast
precisely to allow minimal machining.