05.04.2023
Electron beam powder metallurgy technology
The electron beam powder metallurgy method is intended for creating protective and strengthening composite coatings based on intermetallic compounds, oxides, carbides, nitrides, complex compounds (oxycarbonitrides) on the surfaces of metal products for various purposes
Brief description
Installations for the implementation of electron beam powder metallurgy (EBPM) technology are created on the basis of electron beam plasma guns, which have a service life two orders of magnitude longer compared to thermionic cathode guns, operate at a forevacuum (5-10-3 mm Hg) and in chemically active environments.
Technical and economic indicators
- ELPM technology makes it possible to obtain new gradient electrical contact coatings of arbitrary thickness, purposefully and within a wide range to change their chemical composition, structure and basic service properties: hardness, wear resistance, heat resistance, etc. With ELPM the following are achieved:
- metallurgy (tuyeres, crystallizers, hot and cold rolling rolls, mechanical seals);
- refining the coating material from volatile impurities;
- refinement of the coating structure due to rapid crystallization of the liquid metal bath;
- complete utilization of deposited powder;
- minimal movement and warping of the welded part;
- minimum porosity of coatings (< 0.5%);
- large thickness of coatings (up to 20 mm);
- the proposed technology is environmentally friendly.
The electron beam surfacing installation is a vacuum electron beam automated system with computer control.
Installation technical parameters
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Accelerating voltage |
30 kV |
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Beam current |
120 ma |
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Working chamber pressure |
10-1 Pa |
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Pumping time |
30 min |
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Installed power |
30 kW |
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Deposition rate |
10-50 g/min |
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Powder utilization rate |
100 % |
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Dimensions of welded parts: |
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Overall dimensions of the camera |
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The design of the installation allows you to rotate the welded product on two manipulators and move the electron guns in two-coordinate directions inside the chamber.
Under the influence of an electron beam, a liquid metal bath appears on the surface to be hardened, into which surfacing material is supplied using a powder dispenser. The high crystallization rate contributes to the formation of a homogeneous finely dispersed structure of the deposited layer.
Electron beam cladding capabilities:
- Formation of an extended (up to 1 mm) transition zone “base-coating”.
- Coating of products made of steel, cast iron, copper, titanium.
- Application of coatings with reinforcing particles - carbides, nitrides, carbonitrides, borides and other compounds.
Areas of application
- metallurgy (tuyeres, crystallizers, hot and cold rolling rolls, mechanical seals);
- energy (electrodes of high-voltage switches, blades of steam and gas turbines, shut-off valves);
- mining equipment (drilling tools, shafts, rods, bushings, working parts of crushing equipment);
- oil and gas industry (shut-off valves, thermocouple protective jackets);
- railway and shipping transport;
- mechanical engineering;
- aircraft and rocket engineering;
- automotive equipment (crankshafts, camshafts, valves, pistons, pushers, excavator bucket teeth