Industrial coatings comprise epoxy, phenolic, silicone, and urethane, but growing demands for performance have ushered in fresh materials and process advancements in the commercial coatings marketplace.
Surfaces at the mercy of abrasive or erosive put on, extreme heat, corrosion, or even require dimensional restoration or even electrical insulation, as good examples, can advantage greatly from large velocity oxygen gas (HVOF) kind coatings. Developed in the 1980’s, this branch of thermal spray coatings provides surface property enhancements that may include: adhesive power, hardness, and level of resistance to abrasion or permeation, using a wide variety of alloyed metals and ceramic powders changed into a plasticized condition while fed by way of a temperature gas stream.
Generally known as “wire flame spray” or the “combustion wire coating process”, the procedure utilizes an oxygen-fuel gasoline flame for the heat source. Both cable form and strong rod feed-stock are used. For more information about spray coating visit Air Plasma Spray Coating and Tungsten Carbide Coating On Steel
The outermost tip of the wire or rod is melted since it passes through the flame and is “atomized” into really small particles by way of a surrounding jet of compressed air, propelled to the work-piece to create the coating at the top.
Substrate temperatures remain comparatively lower in the HVOF coating process, little heat is usually imparted to the work-piece, so threat of distortion from heat is usually minimal, only a couple of hundred degrees F, typically, making most metals appropriate for the coating process, including iron, steel, austenite or martensite grades of stainless, alloys of aluminum and copper. Builds (covering thickness) as higher as 0.250 inch are attainable.
Furthermore, the RoHS compliance of HVOF coatings brings significant advantage more than metal finishing processes such as for example hard chrome plating.
Markets for large velocity oxygen gas (HVOF) industrial coatings include automotive, medical, aerospace and defense, printing and paper, meals processing, industrial and production, military, defense and aerospace, and more.
Restoring surface dimensions associated with worn components is really a common usage of this coating course of action. However, utilizes involving line or stage contact, shear loads, higher tension, should be avoided, such as for example gear teeth, threads or splines.
For newly-engineered areas requiring performance answers to abrasive wear, HVOF coatings predicated on tungsten carbide is definitely an excellent option. In applications of surface area fatigue, movement between contacting places, overcoming friction associated with wear, molybdenum can function well.
Thermal spray coatings may solve a number of problems relating mechanical, electric, or corrosion. However, remember that no power is added to the bottom material. Surfaces should be able to endure the mechanical loads operating; nitride or warmth treat as needed.
HVOF is really a versatile coating procedure, offers a selection of materials as metallic finishes. Extrusion dies, piston bands, bearing journals are normal examples of use. What surface qualities do you want to bring to your item or process, using higher velocity oxygen-fuel coatings?