Theoretical study on the stability, elasticity, hardness and electronic structures of W-C binary compounds

The state of laser processing in surface materials modification in Poland is reported, based on own experience, coworkers and coauthors results, as well the literature review. The curriculum concerning historical development of lasers and laser technology in Poland, laser-matter interaction, as well basis of different laser techniques applied in materials surface engineering (solid state hardening, melting, alloying, cladding, ablation, shot peening, cleaning and texturing) are reviewed, and compared with results of coauthors, as well with a wide range of Polish authors papers. Finally, it is concluded that overall state of research on laser application in surface engineering in Poland is well developed and still growing industrial application is observed.

https://journals.pan.pl/Content/83650/PDF/paper_06.pdf

Laser modification of the materials surface layer – a review paper

Surface texturing of multicrystalline silicon solar cells

Structural, electronic properties and stability of tungsten mono- and semi-carbides: A first principles investigation

Mechanical properties and chemical bonding characteristics of WC and W2C compounds

Diode laser surface modification of Ti6Al4V alloy to improve erosion wear resistance

The study of properties of Ni–W2C and Co–W2C powders thermal sprayed deposits

Alloying the X40CrMoV5-1 steel surface layer with tungsten carbide by the use of a high power diode laser

Recent investigations on the laser surface treatment of nickel-based alloys and austenitic stainless steels had shown that it is possible to increase additionally their pitting and erosion-corrosion resistance and also wear resistance as a result of laser surface alloying and laser surface melting. Austenitic stainless steel is one of the most widely used ferrous materials for structural applications in mild to very severe oxidizing environments due to its excellent corrosion resistance, mechanical strength and ductility. Therefore, an experimental investigation on ASTM 304 stainless steel was carried out to determine the influence of surface melting parameters, using a novel diode laser with rectangular and uniform energy distribution across the beam spot, on the shape, penetration depth, structure and microhardness of surface layers. The sample surface was treated using the continuous-wave high-power diode laser with a maximum output power of 2.5 kW. The surface of 304 stainless steel was melted in argon, nitrogen and air atmospheres using different laser output powers at a scanning speed of 500 mm/min. Surface layers after laser melting presented higher microhardness compared with the untreated material. In laser surface melting, a rapidly resolidified surface layer with refined grains of 300 μm thickness was obtained, and the penetration depth of surface layers was in the range 0.3-5.0 mm.

The influence of the shielding gas on the properties of a laser-melted surface of austenitic stainless steel

Semi-automatic, and automatic GMA methods of overlaying with solid and flux-cored wires are some of the main processes used in the production and regeneration surfacing of machine and equipment elements (Fig. 1). A wide range of filler metals is now available on the market and thus enables padding with materials of practically any chemical composition, viz. starting with ordinary carbon through high-alloy austenitic, ferritic, martensitic steels, chromium cast irons, alloys with nickel and cobalt matrices, and up to cermet layers, e.g. layers containing WC or W 2 C carbides in nickel matrix. By choosing a suitable selection of parameters, and

The effect of the method and parameters in the GMA surfacing with solid wires on the quality of padding welds and the content of the base material in the overlay

A. Klimpel

Papers

Diode laser surface modification of Ti6Al4V alloy to improve erosion wear resistance

The study of properties of Ni–W2C and Co–W2C powders thermal sprayed deposits

Alloying the X40CrMoV5-1 steel surface layer with tungsten carbide by the use of a high power diode laser

The influence of the shielding gas on the properties of a laser-melted surface of austenitic stainless steel

The effect of the method and parameters in the GMA surfacing with solid wires on the quality of padding welds and the content of the base material in the overlay