HVOF Coating: It’s Advantages, Uses and Process

HVOF Coating: It’s Advantages, Uses and Process

High-Velocity Oxygen Fuel (HVOF) coating is often a thermal spray coating approach made use of to enhance or restore a component’s surface properties or dimensions, therefore extending gear life by drastically growing erosion and put on resistance, and corrosion protection.

Molten or semi-molten components are sprayed onto the surface by implies in the higher temperature, high-velocity gas stream, making a dense spray coating which might be ground to an extremely higher surface finish

The utilization in the HVOF coating method enables the application of coating supplies which include metals, alloys, and ceramics to make a coating of exceptional hardness, outstanding adhesion towards the substrate material and offering substantial put on resistance and corrosion protection.

Because the technologies specialists in HVOF coating, Bodycote supplies an array of spray coating components to suit your certain desires. Backed by a customer-driven service, our facilities course of action a wide selection of element sizes to exacting requirements with dependable, repeatable benefits.

List of Known Advantages of HVOF Coating

· Lowered charges;

· Enhanced functionality;

· Enhanced electrical properties;

· Enabling elements to operate in higher/lower temperatures;

· Enabling elements to operate inside harsh chemical environments;

· Enhanced efficiency; and

· Enhanced life of mating elements

· Benefits

· Greater density (reduced porosity) on account of a larger effect of velocities around the machinery.

· Greater strength for the substrate band cohesive strength inside the coating of your adhesive.

· Retention of powder chemistry as a consequence of significantly less heating on the temperature plus the metal.

List of Disadvantages of HVOF Coating

· HVOF spray coatings is often really complicated as their properties and functions are dependent in different elements.

· Powder sizes on the spray are restricted to 50–60 sqm and need to have narrow side spectrums.

· HVOF spraying expects certified officers to make sure the secure operation from the coating’s good quality and fidgety.

· As with each of the thermal spraying processes, unique wellbeing and security the troubles get due value. The HVOF spraying commonly requires location inside a safe place with specialized gear.

· HVOF gear calls for a lot more investment as an alternative to just thermal spraying in addition they want flame and arc spraying.

· Manual operation of an HVOF spray gun is just not encouraged because it is direct automated manipulation with the machinery.

Important Uses of HVOF Coating and Materials

Thermal spray coating is an attractive approach as it offers a wide choice of components and processes that have a decreased impact on the environment when compared to conventional plating processes.

HVOF coating components available for thermal spray coating include metals, alloys, ceramics, plastics, and composites.

Process Details of HVOF Coating

As with all thermal spray coating processes, HVOF coating material is heated and accelerated by a gas stream to a component’s surface, to attain better properties. With the HVOF coating approach, the gas stream is produced by mixing and igniting oxygen and fuel (gas or liquid) in a combustion chamber and allowing the high-pressure gas to accelerate through a nozzle. A powder is introduced into this stream where it is heated and accelerated towards a component’s surface. The resulting thermal spray coating consists of thin overlapping platelets.