Temat: surfacing - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Protective Coatings in the Power Boilers Used to Incinerate Waste – Fuel Characteristics of Waste as the Source of Energy
Autorzy:: Słania, J.
Sacharz-Szewczyk, A.
Tematy:: surfacing by welding
surfacing layer
incinerator; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/356368.pdf Link otwiera się w nowym oknie
Opis:: A general characteristics of waste management was presented. Municipal waste was characterised and its fuel properties were provided. Numerous thermal processes of waste utilisation were described such as an incinerating process, free-oxygen technology - pyrolysis, technology with oxygen deficiency - gasification and the plasma technology.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Protective Coatings in the Power Boilers which are Used to Combust Waste – Surfacing Anticorrosive Layers
Autorzy:: Słania, J.
Sacharz-Szewczyk, A.
Tematy:: surfacing by welding
surfacing layer
incinerator; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/350816.pdf Link otwiera się w nowym oknie
Opis:: General requirements and technological solutions of incinerating plants were presented. Heat processing of waste in fluidized and stoker-fired boilers were described. A problem of corrosion and the methods of preventing it in boilers used to combust waste were shown. Materials of increased resistance to corrosion used in power industry were characterised.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Quality Requirements Put On The Inconel 625 Austenite Layer Used On The Sheet Pile Walls Of The Boiler’s Evaporator To Utilize Waste Thermally
Wymagania jakościowe stawiane powłoce austenitycznej inconel 625 stosowanej na ścianach szczelnych parownika kotła do termicznej utylizacji odpadów
Autorzy:: Słania, J.
Krawczyk, R.
Wójcik, S.
Tematy:: surfacing by welding
surfacing layer
incinerator
napawanie
powierzchnia napawania
piec do spopielania; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/355340.pdf Link otwiera się w nowym oknie
Opis:: Quality requirements and tests taken on the surfacing layer Inconel 625 are presented in the article. The reasons of using surfacing layer Inconel 625 and technologies of its making with a particular emphasis on the CMT method are described. Quality requirements for the surfacing weld Inconel 625 are provided. Basic requirements included in the Merkblatt 1166, as well as additional requirements, which are reflected in the technical specifications of the boilers’ producers are specified.
Przedstawiono kryteria jakościowe jakie powinna spełniać powłoka Inconel 625 oraz badania jakim jest poddawana. Omówiono powody dla jakich stosowana jest powłoka Inconel 625 oraz technologie jej wykonywania przy szczególnym uwzględnieniu metody CMT. Opisano wymagania jakościowe dla napoiny Inconel 625. Zaprezentowano zarówno wymagania podstawowe zawarte w Merkblatt 1166 oraz wymagania dodatkowe, których odzwierciedleniem są specyfikacje techniczne wytwórców kotłów.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Examination and Detecting Discontinuities in the Austenite Inconel 625 Layer Used on the Sheet Pile Walls of the Boiler’s Evaporator to Utilize Waste Thermally
Wymagania jakościowe stawiane powłoce austenitycznej Inconel 625 stosowanej na ścianach szczelnych parownika kotła do termicznej utylizacji odpadów
Autorzy:: Słania, J.
Krawczyk, R.
Wójcik, S.
Tematy:: surfacing by welding
surfacing layer
incinerator
wykrywanie pęknięć powierzchniowych
warstwa napawania
spalarnia odpadów; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/351569.pdf Link otwiera się w nowym oknie
Opis:: There are practical aspects of a quality control of the Inconel 625 surfacing weld in terms of undergone examinations and detected defects in chapter three of the article. Visual inspections, examinations of the thickness of the surfacing weld, examinations of an iron content on the surface of the surfacing weld and detecting surface cracks are described. A process of undergone practical examinations is presented.
W rozdziale trzecim przedstawiono praktyczne aspekty kontroli jakościowej napoiny Inconel 625 w ujęciu wykonywanych badań i wykrywanych niezgodności. Omówiono badania wizualne, badania grubości napoiny, badania zawartości żelaza na powierzchni napoiny oraz wykrywanie pęknięć powierzchniowych. Zaprezentowano przebieg praktycznie wykonywanych badań.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Microstructure and Properties of TIG Surfacing Co-Based Alloy on UMCo50 Process Burner
Autorzy:: Xue, Haitao
Luan, Xiaoping
Guo, Weibing
Zhou, Dong
Tematy:: UMCo50 alloy
surfacing
microstructure
properties; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2048805.pdf Link otwiera się w nowym oknie
Opis:: The surfacing layer of cobalt-based alloy is prepared using the tungsten inert gas welding (TIG) process and employing the UMCo50, ST1 and ST6 filler materials. The metallographic testing, hardness, wear and corrosion testing of different surfacing layers have been carried out. Each area of the surfacing layer is characterized using the optical and scanning electron microscope (SEM). Cellular and a few columnar dendrites have been observed near the fusion line of the UMCo50 surfacing layer, and cellular structure is observed in the central region. Dendrites and cellular crystals have been observed in the ST1 and ST6 surfacing layers. The average hardness of UMCo50, ST1 and ST6 surfacing layers are 320 HV, 672.3 HV and 497.5 HV, respectively. The wear loss of the ST1, ST6 and UMCo50 surfacing layer is 2.71 mg, 4.35 mg, and 14.57 mg, respectively. The corrosion weight loss of the ST1, ST6 and UMCo50 surfacing layers are 0.0388 g, 0.0477 g and 0.0833 g, respectively.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Investigation of multilayer coating of EN AW 6060 – T66 using friction surfacing
Autorzy:: Krall, Stephan
Baumann, Christian
Agiwal, Hemant
Bleicher, Friedrich
Pfefferkorn, Frank
Tematy:: additive manufacturing
friction surfacing
aluminum-silicon alloy
coating; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/2142351.pdf Link otwiera się w nowym oknie
Opis:: The objective of this research is to investigate observable process changes during multi-layer friction surfacing of EN AW 6060 aluminum, whether for repair, remanufacturing, or new part manufacturing. In this study, friction surfacing was performed with a 10-mm-diameter rod of EN AW 6060 aluminum at spindle speeds ranging from 1000 to 7000 rpm to create up to three layers of 40-mm-long deposits on a substrate of the same alloy. The process forces and layer temperatures were observed. Post-process measurement of flash geometry, layer geometry and microhardness were conducted with the motivation to understand the impact of multi-layer depositions on performance and identifying acceptable conditions required to achieve acceptable build quality. The thickness, deposition and joining efficiency of layers in the multilayer configuration remained consistent. Friction surfacing of EN AW 6060 aluminum allowed for high deposition rates of 9 kg/hr, when compared to other metal additive technologies.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The impact of gas on the tribological properties of steel 16MnCr5 after surfacing with micro-jet cooling
Autorzy:: Tarasiuk, W.
Piwnik, J.
Hornik, A.
Węgrzyn, T.
Majewski, W.
Tematy:: wear resistance
steel 16MnCr5
micro-jet
surfacing; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/244978.pdf Link otwiera się w nowym oknie
Opis:: This paper presents results of experimental research concerning the impact of an innovative method of micro-jet cooling on the padding weld performed with MAG welding. It enables to steer the parameters of weld cooling in a precise manner. Micro-jet cooling is a novel method patented in 2011. In addition, various elements, which may e.g. enhance hardness or alter tribological properties, can be entered into its top surface, depending on the applied cooling gas. The micro-jet welding method is the innovative method, which reduces the intensity of abrasive wear. The method can be used as a basic finishing or a regeneration method. An innovative technology for micro-jet is used to cool the weld surface that is, using a micro-welding jet cooling. This allows accurate and complete control of the surface structure of the deposit. The material under study was steel 16MnCr5, which was subject to the welding process with different gases of micro-jet cooling. Nitrogen and air was used as a cooling gas. The main parameter of weld assessment was wear intensity. The tests were conducted in a tribological pin-on-disc type position. T-11 pin-on-disc tester allows for indicating basic wear parameters (wear intensity, wear coefficient, wear force). Based on results of experiment the application of nitrogen in micro-jet cooling of the padding weld in the welding process of steel 16MnCr5 beneficially affects resistance to abrasive wear.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Thermomechanical States in Arc Weld Surfaced Steel Elements
Autorzy:: Winczek, J.
Skrzypczak, T.
Tematy:: temperature field
phase transformation
Gas Metal Arc Weld surfacing; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/352289.pdf Link otwiera się w nowym oknie
Opis:: Kinetics of phase transformations during heating is limited by temperature values at the beginning and at the end of austenitic transformation, while the progress of phase transformations during cooling is determined on the basis of TTT-welding diagram and Johnson-Mehl-Avrami and Kolomogorov law for diffusive transformations and Koistinen-Marburger for martensitic transformation. Stress state of a bar subjected to thermo-mechanical loads is described assuming the plane cross section hypothesis and using integral equations of stress equilibrium of a bar as well as simple Hook’s law. Stresses in the elastic-plastic state are determined by iteration using solutions with a variable elastic modulus of elasticity, conditioned by tensile curves. Dependence of stresses on strains is assumed on the basis of tensile curves of particular structures, taking into account the influence of temperature. There were performed calculations of the temperature field, phase transformations, strains and stresses for GMAW surfacing of a cuboid element made of S235 steel. Authors’ programs, made in Borland Delphi, were used for calculations.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: The Analysis of Thermomechanical States in Multipass Arc Weld Surfaced Steel Elements
Autorzy:: Winczek, J.
Tematy:: temperature field
phase transformation
Gas Metal Arc Weld surfacing; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/352503.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the analysis of temperature fields, phase transformations, strains and stresses in a cuboidal element made from S235 steel, surfaced with multipass GMA (Gas Metal Arc) method. The temperature field is described assuming a dual-distribution heat source model and summing up the temperature fields induced by the padded weld and by the electric arc. Dependence of stresses on strains is assumed on the basis of tensile curves of particular structures, taking into account the influence of temperature. The calculations were carried out on the example of five welds in the middle of the plate made of S235 steel. The simulation results are illustrated in graphs of thermal cycles, volume shares of structural components and stresses at the selected points of cross-section, and the temperature and strain distributions in the whole cross section.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Modelling of a temporary temperature field during arc weld surfacing of steel elements taking into account heat of the weld
Autorzy:: Winczek, J.
Rygał, G.
Tematy:: modeling
arc weld surfacing
temperature field
modelowanie
pole temperatury; Pokaż więcej
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Powiązania:: https://bibliotekanauki.pl/articles/122403.pdf Link otwiera się w nowym oknie
Opis:: In this work, a model of a temperature field in a steel element during a singlepass arc weld surfacing is presented. Analytical solution for half-infinite body model is obtained by aggregating temperature increments caused by applying liquid metal and heat radiation of a moving electrode. The assumptions are Gaussian distributed heat sources of applied metal and the weld and of an electric arc heat source. Computations of the temperature field were carried out during arc weld surfacing of cuboidal steel element. The results are presented as temporary and maximum temperature distribution in the element’s crosssection and thermal cycles at selected points. The accuracy of the solution is verified comparing a calculated fusion line to that obtained experimentally.
Dostawca treści:: Biblioteka Nauki

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