Ni95Al5 for Thermal Spraying Industry
Thermal spraying process is a kind of surface strengthening technology, which is an important part of surface engineering technology. It makes use of a heat source (such as arc, plasma spraying and combustion flame, etc.) will be powder or filiform metal or nonmetal material heated to melt or half molten state, and then with the help of a flame itself or compressed air injection at a certain speed to the pretreatment of substrate surface, deposit formed by surface coating of a kind of technology with a variety of functions.
Thermal spraying theory: Thermal-spraying refers to a series of processes, in these processes, fine and dispersed metal or non-metal coating materials, in a melted or semi-melted state, deposited to a prepared substrate surface, forming a spray coating layer. The coating material may be powder, ribbon, filament or rod. The thermal spraying gun provides the necessary heat from fuel gas, electric arc or plasma arc to heat the thermal spraying material to a plastic or molten state, and then is accelerated by compressed air to impact the confined particle beam on the surface of the matrix. The particles impacting the surface are deformed by stamping and form laminated thin sheets, which adhere to the surface of the prepared matrix, then cool and accumulate continuously, and eventually form a layered coating. Due to the different coating materials, the coating can achieve high temperature corrosion resistance, wear resistance, heat insulation, electromagnetic wave resistance and other functions.
Thermal spraying refers to the use of oxygen - acetylene flame, arc, plasma arc spraying device, such as the explosion wave provides different heat source, produce high temperature and high pressure flame flow or supersonic flame flow, will be made into coating materials such as various kinds of metal, ceramic and metal ceramic composite materials, all kinds of plastic powder solid coating materials, instant heating to the plastic state or molten, A surface finishing process in which a coating is formed by spraying at high speed onto the surface of a pretreated (clean and rough) part. We call the special working surface "coating", and the working method of manufacturing coating is called "thermal spraying", which is the general term for spraying and spray welding using various heat sources.
Applications: under the action of high-speed air flow, it is atomized into micro droplets or high temperature particles, which are sprayed to the surface of the processed workpiece at a high speed, forming a firm covering layer. So that the workpiece surface to obtain different hardness, wear resistance, corrosion resistance, heat resistance, oxidation resistance, heat insulation, insulation, conductive, sealing, disinfection, microwave radiation and other special physical and chemical properties. It can be used in equipment maintenance, so that scrapped parts to be well repaired It can also be strengthened and pre-protected in the manufacture of new products to make them "prolong life".
Thermal spraying materials: spraying powder occupies a very important position in the whole thermal spraying materials. Thermal spraying alloy powder including nickel based, iron based and cobalt based alloy powder, according to different coating hardness, respectively applied to repair and protection of mechanical parts.
Post time: Mar-15-2022