A new design of the PTA torch (PTA torch) for surfacing of nickel, cobalt and iron-based alloys was developed. It combines two systems of powder feeding into the arc: the internal and external one. Such a combination expands the technological capabilities of the PTA torch, and allows surfacing magnetic and nonmagnetic materials.
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Features of centrifugal plasma surfacing using powders of three different alloying systems based on iron and nickel were studied. It is found that at centrifugal plasma surfacing the iron-based test powder has the best welding-technological properties. It allows producing deposited metal of 200Kh15D2MS2R type.
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It has been established that when a self-fluxing nickel-based alloy is used as a matrix, the most stable surfacing process is achieved if tungsten carbides are fed through the axial bore in the focusing nozzle, and ...
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The peculiarities of formation of a bead on narrow tip of screw flight in PTA surfacing were investigated. It is shown how a shape of deposited bead depends on its section and main technological parameters of surfacing, i.e. arc current, surfacing speed and PTA torch zenith displacement.
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Area of investigation was powder losses in plasma-powder surfacing using plasmatrons with internal and external schemes of its feeding into arc. Dependence of powder losses on its fraction, geometry of deposited bead and surfacing efficiency was shown.
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The structure and properties of wear- and corrosion-resistant alloy of Fe–Cr–V–Mo–Ni–C system were investigated for plasma surfacing of screw conveyors of extruders and injection molding machines. It was shown that combination of high wear resistance and ductility of the alloy is achieved due to ...
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In this work, thermal processes running in the thick-walled pipe wall at centrifugal plasma powder cladding were studied by computational experiment method. Temperature fields in each point of the item were calculated, depending on the cladding mode.
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Present paper is devoted to research of a wear resistance of surfaced metal, a dependence on quantity and forms of reinforcing particles of FTC, a way of their input in a welding pool, and also a type of matrix
The plasma centrifugal surfacing (PCS) is a very new and promising technology. This technology is developed recently and, in fact, is unknown on the Western market yet. Indeed, we already use the PCS in industry to protect the inner faces of liner-type details with high grade layers against wear, corrosion and friction.
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Our work was aimed at the conductance of theoretical and experimental investigations of effect of a laser beam on the process of a plasma-powder cladding (PPC) and revealing of new technological capabilities of a combined method, i.e. laser-plasma powder cladding (LPPC).
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Being a modern advanced technology, the plasma transferred arc (PTA) surfacing is used wide to coat function areas of high responsibility details with special materials, which are resistant against intensive wear, corrosion, thermal and percussive loading.
The Plasma-Master Co., Ltd. develops the collection of plasma torches for the various purposes. That allows to fill specified lack very largely. At that the world experience and results of own researches of the author are used widely.
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