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Search results for: MEASUREMENT BY LASER BEAM
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Examination method of the effect of the incidence angle of laser beam on distance measurement accuracy to surfaces with different colour and roughness
PublicationInterest in the influence of the incidence angle of a laser beam to distance measurements can be seen in many areas of science and technology: geodesy, glaciology, archaeology, machine automation, and others. This paper presents results of measurements of the effect of the incidence angle of a laser beam to distance measurements to the surfaces of different colour and roughness by Topcon's electro-optical total station with an...
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Double wedge prism based beam deflector for precise laser beam steering
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Modelling of the Heat Flux Density Distribution for Laser Beam Welding
PublicationGreat interest of the laser beam welding in industry is a new theoretical task, making planning the welding procedure specification and the quality control of welded joints easier. Estimating and calculating the dimensions of a weld pool and temperature distribution near weld mainly concern heat source modelling. In the presented work calculations of welding pool shape and thermal field for cylindrical-powered-normally model of...
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Influence of Parameters of Laser Beam Welding on Structure of 2205 Duplex Stainless Steel
PublicationLaser welding is used in modern industry, having many advantages comparing to traditional welding technologies. Nowadays, industry sectors such as shipbuilding, automotive and aviation can’t be imagined without laser processing technologies. Possibility of increase of welded joint properties, autogenous welding and high level of process automation makes the technology of laser welding perspective part of the industry. Physical...
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Impact of laser beam welding on mechanical behaviour of 2.25Cr–1Mo (P22) steel
PublicationThe use of welding processes in the manufacturing and repair of structures intended for the energy industry plays a key role in the guarantee of a continuous supply of fossil fuels, which is the basic condition for ensuring energy security. A square butt joint of 10 mm thick plate of 2.25Cr–1Mo (P22) steel was fabricated by autogenous laser beam welding process and then post-weld heat treatment (PWHT) for two sets of process parameters...
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Laser reflectance interferometry system with a 405 nm laser diode for in-situ measurement of CVD diamond thickness
PublicationIn situ monitoring of the thickness of thin diamond films during technological processes is important because it allows better control of deposition time and deeper understanding of deposition kinetics. One of the widely used techniques is laser reflectance interferometry (LRI) which enables non-contact measurement during CVD deposition. The authors have built a novel LRI system with a 405 nm laser diode which achieves better...
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Effects of preheating on laser beam–welded NSSC 2120 lean duplex steel
PublicationDuplex stainless steels show sustainable alternative for the conventional austenitic grades, with higher strength, higher resistance against stress corrosion cracking, and lower purchase cost. Thus, duplex stainless steel gains more attention in construction, oil and gas, and chemical industries. Among duplex stainless steels, low nickel and low molybdenum alloyed lean duplex stainless steel are a cost-efective substitution of...
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Cavitation erosion of some alloys manufactured on steel and iron surfaces by laser beam.
PublicationPrzedstawiono badania odporności kawitacyjnej stali węglowej 45 odpornej na korozję 2H13 i technicznego żelaza po ich obróbce laserowej. Warstwę wierzchnią wybranych stali wzbogacono w różne pierwiastki stopowe i badano odporność kawitacyjną na stanowisku z wirującą tarczą. Stwierdzono niską odporność kawitacyjną dla warstw o obniżonej zdolności do utwardzania pod wpływem obciążeń kawitacyjnych oraz silną zależność odporności...
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Influence of laser beam machining on the cavitation resistance of Fe-Cr-Co clad.
PublicationW pracy przedstawiono wpływ laserowego nagrzewania bezzmiany stanu skupienia i laserowego przetapiania napoin ze stopu Fe-Cr-Co na ich odporność kawitacyjną. Badania kawitacyjne prowadzono na stanowisku z wirującą tarczą. Plastyczne odkształcenia powierzchni określano za pomocą analizy obrazów erodowanych powierzchni. Uzyskane rezultaty wskazują, że laserowo obrabiane powierzchnie miały różną podatność do plastycznego odkształcania...
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Cavitation erosion of chromium-manganese and chromium-cobalt coatings processed by laser beam
PublicationPrzedstawiono wyniki badań erozji kawitacyjnej napoin wykonanych za pomocą elektrod chromowo-manganowych i chromowo-niklowych oraz obrobionych wiązką lasera CO2 o mocy 1000 W. Próbki poddawano obciążeniom kawitacyjnym na stanowisku z wirującą tarczą. Zaobserwowano wzrost odporności kawitacyjnej napoin, w których dokonano przetopienia ich powierzchni promieniowaniem lasera.