Temat: roughness - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The influence of treatment conditions on cutting forces and surface roughness
Autorzy:: Labuda, W.
Powiązania:: https://bibliotekanauki.pl/articles/241665.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: turning dynamometer
surface roughness parameter
stainless steel
Opis:: One of the greatest problems of modern production techniques is the achievement of an appropriate quality at minimal costs and accompanied by the production efficiency increase. Therefore, while designing the production process, the technology used should have a considerable influence on the durability and reliability of machine parts to be produced. During finish treatment, the final dimensions as well as functional properties are imparted to a given element by application of proper treatment type. The engineer has a range of production techniques to choose for the proper surface layer formation. It is crucial to find a suitable solution which will meet the requirements as well as the work conditions of a given machine part. The article presents the results of influence of treatment conditions during turning of shafts on the cutting forces and surface roughness parameter. A roller made of S235JR steel was used for the research. The cutting process was carried out on a universal CDS 6250 BX-1000 and CU500MRD centre lathes. Measurement of cutting forces during lathing process used DKM 2010 and Kistler turning dynamometers. The turning process was conducted by a cutting tool with CCMT09T304 PF removable plate. During the turning, the following machining parameters were used: cutting speed Vc = 150 m/min, feed f=0.106 mm/rev and cutting depth ap = 0.5, 0.75, 1.0, 1.25, 1.5, 1.75 mm. The surface roughness was measured by T8000 profilometer.
Źródło:: Journal of KONES; 2016, 23, 1; 207-213
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Improvement of the stainless steel electropolishing process by organic additives
Autorzy:: Lochynski, P.
Kowalski, M.
Szczygiel, B.
Kuczewski, K.
Powiązania:: https://bibliotekanauki.pl/articles/779206.pdf
Data publikacji:: 2016
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: electropolishing
organic additives
surface roughness
stainless steel
Opis:: The influence of organic additives on the process of surface electropolishing of AISI 304 type steel was determined. Additives were selected in initial potentiodynamic tests pursuant to the plateau analysis on the current/potential curves. The assessment of the operational effectiveness of additives consisted in determining the relationship between surface gloss after electropolishing and the mass loss of the sample and in determining surface roughness. The applied electropolishing bath consisted of a mixture of concentrated acids: H₃PO₄ and H2SO₄ and the following organic additives were used: triethylamine, ethanolamine, diethanolamine, triethanolamine, diethylene glycol monobutyl ether and glycerol. The best electropolishing result, i.e. low roughness and high gloss of stainless steel surface with a relatively low mass loss of the sample at the same time were obtained for baths containing triethanolamine.
Źródło:: Polish Journal of Chemical Technology; 2016, 18, 4; 76-81
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The influence of changing of treatment condition on surface roughness parameter during turning process by wiper insert
Autorzy:: Labuda, Wojciech
Powiązania:: https://bibliotekanauki.pl/articles/243562.pdf
Data publikacji:: 2019
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: finish turning process
surface roughness parameter
cutting parameters
stainless steel
Opis:: One of the greatest problems of modern production techniques is the achievement of an appropriate quality at minimal costs and accompanied by the production efficiency increase. Therefore, while designing the production process. The technology used should have a considerable influence on the durability and reliability of machine parts to be produced. During finish treatment, the final dimensions as well as functional properties are imparted to a given element by application of proper treatment type. The engineer has a range of production techniques to choose for the proper surface layer formation. It is crucial to find a suitable solution which will meet the requirements as well as the work conditions of a given machine part. The article presents the results of influence of change of cutting parameters on surface roughness parameter during turning process of stainless steel. A shaft made of 304L stainless steel was used for the research. The chemical composition of steel was measured by Solaris-ccd plus optical spectrometer. The cutting process was carried out on a universal CDS 6250 BX-1000 centre lathes. Measurement of surface roughness was carried out by T8000 profilometer. The turning process was conducted by a cutting tool with Wiper insert. During the turning, the following machining parameters were used: cutting speed Vc [m/min], feed f [mm/rev], cutting depth ap [mm] and additionally changed nose radius r [mm], and tool cutting edge angle ϰr [º]. The results of measurements of Ra parameter underwent statistic analysis. The calculations were conducted by Statistica software.
Źródło:: Journal of KONES; 2019, 26, 1; 81-88
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The influence of cutting inserts geometric on surface roughness of steel applied to sea water pump shafts
Autorzy:: Labuda, W.
Powiązania:: https://bibliotekanauki.pl/articles/244988.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: turning dynamometer
surface roughness parameters
stainless steel
marine pump shaft
Opis:: One of the greatest problems of modern production techniques is the achievement of an appropriate quality at minimal costs and accompanied by the production efficiency increase. Therefore, while designing the production process, the technology used should have a considerable influence on the durability and reliability of machine parts to be produced. During finish treatment, the final dimensions as well as functional properties are imparted to a given element by application of proper treatment type. The engineer has a range of production techniques to choose for the proper surface layer formation. It is crucial to find a suitable solution which will meet the requirements as well as the work conditions of a given machine part. The article presents the research results of pump shaft pins finish turning. The research was performed on a roller 60 mm in diameter made of X5CrNi18-10 steel. The finish tooling of pump shaft pins was carry out on a universal CDS 6250 BX-1000 centre lathe. The finish lathing process was carried out by means of Sandvik Coromant cutting tool with replaceable inserts. In the research of lathing process used standard inserts (MF), inserts with increased tolerance (UM) and inserts with Wiper technology (WF). During lathing, the optimal machining parameters were used. The cutting process was performed at entering angle of 90°. The process of lathing used cutting tool dynamometer DKM 2010. During the research, the effect of cutting insert geometric and optimal cutting parameters on the surface roughness of steel applied to marine pumps shaft pins was determined.
Źródło:: Journal of KONES; 2015, 22, 3; 133-140
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Kontrola chropowatości powierzchni stali AISI 136L SS po polerowaniu elektrochemicznym w polu magnetycznym w zakresie transpasywnym krzywej polaryzacji
Control of AISI 316L SS surface roughness after magnetoelectrochemical polishing MEP treatment within the transpassive region of polarisation characteristics
Autorzy:: Rokosz, K.
Powiązania:: https://bibliotekanauki.pl/articles/158450.pdf
Data publikacji:: 2010
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: pomiary chropowatości
stal nierdzewna
elektropolerowanie
roughness measurements
stainless steel
electropolishing
Opis:: Proces elektropolerowania jest kontrolowanym anodowym roztwarzaniem powierzchni metalu/stopu. Komercyjnie proces jako obróbka wykończająca został wprowadzony do produkcji w 1950 roku. Otrzymana po nim powierzchnia charakteryzuje się małą chropowatością, dużym połyskiem oraz gładkością. Artykuł prezentuje możliwość kontrolowania i jednocześnie sterowania chropowatością powierzchni otrzymywaną po procesie elektropolerowania na podstawie otrzymanego modelu matematycznego. Model wyznacza zależność chropowatości powierzchni (Sa [Μm]) od wielkości pola magnetycznego (B [mT]) oraz gęstości prądu polerowania (i [A/dm2]). Otrzymane wyniki pokazują, że zakres chropowatości po obróbce elektrochemicznej w zależności od warunków polerowania mieszczą się w przedziale 0,602 Μm do 1,612 Μm. Najlepsze parametry chropowatości powierzchni po obróbce mechanicznej papierem ściernym (Sa=2,5 Μm) dla czasu polerowania t=1 min w roztworze kwasów H2SO4 i H3PO4 w stosunku 4:6, w temperaturze 65 š 5 oC otrzymano dla warunków: B=0 mT, i=525 A/dm2 (Sa=0,762 Μm) oraz B=225 mT, i=50 A/dm2 (Sa=0.612 Μm), a najgorsze dla: B=225 mT, i=525 A/dm2 (Sa=1,612 Μm).
Electropolishing is controlled anodic dissolution of metals which improves surface properties of metals. It is often referred to as a "reverse plating" or "Super Passivation" process. Commercial applications of electropolishing have been in use since 1950's. Conventional mechanical finishing systems can smear, bend, stress or even fracture the crystalline metal surface to achieve smoothness or brightness. Electropolishing offers the advantage of removing metal from the surface producing a unidirectional pattern that is both stress and occlusion free, microscopically smooth and often highly reflective [1, 2]. Solutions are available to electropolish most common metals. To establish optimum conditions for electropolishing, a polarization curve is plotted and a plateau of current densities is established. The current densities plateau mainly exists just below the oxygen evolution regime. For many materials like steels the best electropolishing results are obtained over this plateau under oxygen evolution conditions. The paper presents control of surface roughness after standard- and magnetic- electrochemical polishing under different conditions. Mechanically polished samples (Sa=2,5 Μm) were prepared for electrochemical polishing. The electrolyte with 10% water content and a ratio between H2SO4 and H3PO4 of 4:6 was proved to be successful [1, 2, 3]. The electrolyte temperature of 65 š 5 oC and processing time 1 min were found to be optimal. The obtained results show that the surface roughness after treatment was in the range: from 0,602 Μm to 1,612 Μm. The best results were obtained after electrochemical treatment for the following parameters: B=0 mT, i=525 A/dm2 (Sa=0,762 Μm) as well as B=225 mT, i=50 A/dm2 (Sa=0,612 Μm), while the worst one for: B=225 mT, i=525 A/dm2 (Sa=1,612 Μm) [Table 2, Fig. 9].
Źródło:: Pomiary Automatyka Kontrola; 2010, R. 56, nr 4, 4; 322-325
0032-4140
Pojawia się w:: Pomiary Automatyka Kontrola
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Grinding of stainless steel X6CrNiMoTi and its final roundness
Autorzy:: Naprstkova, N.
Novak, M.
Cais, J.
Powiązania:: https://bibliotekanauki.pl/articles/111954.pdf
Data publikacji:: 2014
Wydawca:: Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:: roughness
analyses
stainless steel
grinding
chropowatość
analiza
stal nierdzewna
szlifowanie
Opis:: Machining of stainless steels is often an important technology used in production. Products made from these materials are very often used in mechanical engineering, and quality of work-piece surface after machining respective grinding is one of the important parameters that to us speak about the quality of the machining process. One of these parameters that can to give evidence about the quality of the surface is for rotating part the roundness. Its measurement is one of the important sources of information about how cutting conditions can affect the quality of the machined surface. The paper deals with the influence of cutting conditions when grinding steel X6CrNiMoTi (EN ISO) on the roundness of a machined surface.
Źródło:: Production Engineering Archives; 2014, 5, 4; 18-21
2353-5156
2353-7779
Pojawia się w:: Production Engineering Archives
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Corrosion effect of 65% Nitrate acid on X4CrNi1812 at 333 K
Autorzy:: Lipiński, Tomasz
Karpisz, Dariusz
Powiązania:: https://bibliotekanauki.pl/articles/104158.pdf
Data publikacji:: 2019
Wydawca:: Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:: steel
stainless steel
corrosion
corrosion rate
roughness
stal
stal nierdzewna
korozja
szybkość korozji
chropowatość
Opis:: Austenitic stainless steels are often used for a materials in the construction of machines and equipment for agricultural and for industrial construction. One of the most important factors constructional material is corrosion resistance. Equipment with austenitic stainless steel can be easy join by quickly welding at a not to high construction price, but one with the serious problem in aggressive environment is their corrosion resistance. A few corrosion processes in crevices and awkward corners can be avoided at the design stage (low roughness parameters, round-section and other). But still the construction material is exposed to corrosion. These steels often come into contact with an aggressive environment based on nitric acid. The main aim of this research is to investigate corrosion resistance in different time (48, 96, 144, 192, 240, 288, 336 hours). For this used weight loss of test samples and its profile roughness. The research was conducted on austenitic stainless steel in grade in Nitrate acid at 333 K. Corrosion tests confirmed that the research this steel in 65% nitrate acid as a corrosive environments is characterized through proportionate to time corrosion process whose measure may be surface roughness. In industrial practice roughness parameters for all the research times can be used for determine the stage and size of steel corrosion.
Źródło:: Quality Production Improvement - QPI; 2019, 1, 1; 425-432
2657-8603
Pojawia się w:: Quality Production Improvement - QPI
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Vibratory Shot Peening of Elements Cut with Abrasive Water Jet
Autorzy:: Skoczylas, Agnieszka
Powiązania:: https://bibliotekanauki.pl/articles/2172350.pdf
Data publikacji:: 2022
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: vibratory shot peening
abrasive water jet cutting
stainless steel
surface roughness
microhardness
statistical analysis
Opis:: The paper presents the effect of technological parameters of vibratory shot peening on the roughness and microhardness of the surface layer of shot peened objects. Moreover, the surface topography results from vibratory shot peening was analyzed. In the experiment, samples made of 1.4301 stainless steel were used, which were cut by abrasive water jet (AWJ). The geometrical structure of the surface after vibratory shot peening was changed. The surface roughness was obtained in the range of Rsk = -0.600 ÷ -1.115 and Sa = 3.01 ÷ 6.53 μm, The value of microhardness ΔHV, near to the surface, is from 36 HV0.05 to 100 HV0.05. The changes in microhardness reach on the depth gh = 100 μm. An analysis of variance ANOVA for the investigated dependent variables was performed. The Tukey's test was used to checked the influence of the independent variable on the dependent variable. The aim to obtain favorable properties of the surface layer of elements after abrasive water jet cutting, it is recommended to use a vibratory shot peening time of approx. 6 minutes and balls of diameter d = 6 mm.
Źródło:: Advances in Science and Technology. Research Journal; 2022, 16, 2; 39--49
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Sequential treatment process in a rotary container polishing machine with periodic workpiece location changes in working abrasives areas
Autorzy:: Juniewicz, Mateusz
Plichta, Jarosław
Powiązania:: https://bibliotekanauki.pl/articles/2201643.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: mass finishing
active holder
stainless steel
surface roughness
obróbka wykończeniowa
uchwyt aktywny
stal nierdzewna
chropowatość powierzchni
Opis:: This paper presents the process of a 3-step machining process involving pre-treatment, smoothing and polishing, placing the workpiece in different energy levels of the working load in a rotary-cascade container smoother, by moving it towards the radial direction of the working chamber of the smoother. Studies show the ability to control the course of pre-treatment, smoothing and finishing intensity, both in terms of process parameters and treatment time. Such a structure of the machining process, it also allows you to influence the structure geometry of the machined surfaces in successive stages of machining, and consequently on the final quality. The proposed organization and structure of the process allows for the creation of a new one surface treatment strategy.
Źródło:: Journal of Mechanical and Energy Engineering; 2022, 6, 2; 1--6
2544-0780
2544-1671
Pojawia się w:: Journal of Mechanical and Energy Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: The burnishing process of the stainless steel in aspect of the reduction roughness and surface hardening
Autorzy:: Dyl, T. C.
Powiązania:: https://bibliotekanauki.pl/articles/246904.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: burnishing rolling–pressuring process
BRP
surface roughness reduction ratio
degree of relative strain hardening
stainless steel
Opis:: In the article were presented influence of technological parameters of burnishing process on the degree of hardness and reduction roughness. Burnishing process carried out for stainless steels X2CrNiMo17-12-2. The experimental research were obtained in the surface layer increase in hardness and the material ratio curve a convex shaped, which, taking into account the load capacity of the surface will be directly affected by its resistance to wear and corrosion. The experimental research by application of the burnishing rolling – pressuring process (BRP) method were made in the Laboratory of Production Engineering at the Department of Marine Maintenance at the Faculty of Marine Engineering at the Gdynia Maritime University. After the studies it was found that the hardness of the surface layer and the roughness of the shaft necks an important influenced by technological parameters of processing (burnishing speed, feed and depth of burnishing). The objective of applying burnishing process may be, for example, the need to increase surface smoothness and dimensional accuracy of part. To achieve the objectives strengthen and smooth of burnishing stainless steel should be used the one pass burnisher roller and feed fn = 0.2 mm/rev and disk burnishing tool feed an = 1.0 mm and burnishing speed vn = 70 m/min.
Źródło:: Journal of KONES; 2017, 24, 3; 63-69
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: The effect of parameters burnishing rolling – pressuring process in aspect to technological quality surface layer of 316L stainless steel
Autorzy:: Dyl, T. C.
Powiązania:: https://bibliotekanauki.pl/articles/244990.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: burnishing process
hardness
roughness
surface layer
stainless steel
proces nagniatania
twardość
chropowatość
warstwa powierzchniowa
stal nierdzewna
Opis:: In the manufacturing of machine elements was important to technological quality products. In surface engineering one of the economic and ecological treatments used for technological properties were burnishing rolling – pressuring process. This is a surface plastic forming a local plastic deformation based on the overall impression given by smooth and hard tool. In production, engineering cylindrical outer surfaces (e.g. plugs propulsion shaft centrifugal pumps seawater) were finishing. You can therefore propose burnishing in exchange for abrasive machining. The article presents the influence of parameters for burnishing rolling – pressuring process on the degree of relative strain hardening and surface roughness reduction ratio. Burnishing process carried out for 316L stainless steels. After the experimental study, it was determined that there was an increase in hardness and a decrease in roughness of the top outer cylindrical layer of stainless steel, which can be applied to the centrifugal pump shafts ship. Important question to determine in the article of the research was to receive appropriate technological quality. The burnishing due the technological and economic aspect in the production of machine parts in exchange for the abrasive processing can be used. After the experiments, it was found that the technical parameters are influenced by the hardness and the roughness of the outer cylindrical surfaces and the material ratio curve a convex shaped, which, taking into account the load capacity of the surface will be directly affected by its resistance to wear and corrosion of the surface layer.
Źródło:: Journal of KONES; 2018, 25, 1; 75-81
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Investigation of corrosion rate of X55CrMo14 stainless steel at 65% nitrate acid at 348 K
Autorzy:: Lipiński, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/1839535.pdf
Data publikacji:: 2021
Wydawca:: Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:: stal
stal nierdzewna
korozja
szybkość korozji
profil chropowatości
steel
stainless steel
corrosion
corrosion rate
profile roughness
Opis:: A number of factors determine the mechanical, but also physical and chemical properties. One of the most important are the steel microstructure and its working conditions. A few corrosion processes in crevices and awkward corners can be avoided at the design stage (low roughness parameters, roundsection and other). But still the construction material is exposed to corrosion. These steels often come into contact with an aggressive environment based on nitric acid. Stainless steel is more and more often used in many sectors of industry. The purpose of this article is to investigate corrosion resistance in different time (48, 96, 144, 192, 240, 288, 336, 384 and 432 hours) using weight loss and profile roughness parameters of martensitic steel in grade X55CrMo14 in nitric acid 65% pure-basic at temperature 348 K. Corrosion tests show that the tested steel in nitric acid as a corrosive environments is characterized through continuous corrosion process whose measure may be surface roughness.
Źródło:: Production Engineering Archives; 2021, 27, 2; 108-111
2353-5156
2353-7779
Pojawia się w:: Production Engineering Archives
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Corrosion of X2CRNiN23-4 lean duplex stainless steel annealed at 485°C
Korozja stali nierdzewnej Lean duplex w gatunku X2CrNiN 23-4 po wyżarzaniu w temperaturze 485°C
Autorzy:: Lipiński, T.
Powiązania:: https://bibliotekanauki.pl/articles/256955.pdf
Data publikacji:: 2016
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:: stainless steel
duplex steel
corrosion
corrosion rate
profile roughness
stal nierdzewna
stal duplex
korozja
szybkość korozji
profil chropowatości
Opis:: Lean duplex stainless steels are ferritic-austenitic steel, and they present the excellent corrosion resistance of austenite steel and the high mechanical behaviour of ferrite steel. General important corrosion problems in duplex stainless steels at 475°C have been already detected. Although the worst temperature is 475°C, corrosion can still form at lower or higher temperatures. The purpose of this work was to ascertain how 30-minutes isothermal heat treatments at 485°C and corrosion time effect the relative mass loss and profile roughness parameters of X2CrNiN23-4 lean duplex stainless steel. The real critical temperature for researching steel was determinate by the DSC method. Corrosion tests were conducted in a nitric acid medium by the measurement of loss in mass (Huey test). The corrosive media was boiling nitric acid V 65%. The corrosion rate of the X2CrNiN23-4 steel was measured in mm/year and in g/m2.
Stale nierdzewne Lean duplex są stalami ferrytyczno-austenitycznymi o doskonałej odporności na korozję stali austenitycznej, a wysokich właściwościach mechanicznych stali ferrytycznej. Ważny problem korozji stali odpornej na korozję duplex w temperaturze 475°C został już stwierdzony. Chociaż najniekorzystniejszą temperaturą jest 475°C, korozja może przebiegać zarówno w temperaturze niższej, jak i wyższej. Celem niniejszej pracy było zbadanie, jak 30-minutowe izotermiczne wyżarzanie stali w temperaturze 485°C oraz czas przetrzymywania w ośrodku korozyjnym wpłynie na ubytek masowy oraz chropowatość powierzchni stali lean duplex w gatunku X2CrNiN23-4. Rzeczywista temperatura krytyczna dla badań stali została określona metodą DSC. Badanie korozyjne (ubytku masy) prowadzono w środowisku kwasu azotowego V 65% w temperaturze wrzenia (test Huey). Prędkość korozji stali X2CrNiN23-4 określono w mm/rok i w g/m2.
Źródło:: Problemy Eksploatacji; 2016, 3; 187-195
1232-9312
Pojawia się w:: Problemy Eksploatacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Factors Influencing Cavitation Erosion of NiCrSiB Hardfacings Deposited by Oxy-Acetylene Powder Welding on Grey Cast Iron
Autorzy:: Szala, Mirosław
Walczak, Mariusz
Hejwowski, Tadeusz
Powiązania:: https://bibliotekanauki.pl/articles/2023792.pdf
Data publikacji:: 2021
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: hardness
stainless steel
cavitation erosion
cast iron
surface engineering
powder welding
surface roughness
hardfacing
twardość
stal nierdzewna
erozja kawitacyjna
żeliwo
inżynieria powierzchni
spawanie proszkowe
chropowatość powierzchni
utwardzanie
Opis:: The work presents the results of a study on cavitation erosion (CE) resistance of two NiCrSiB self-fluxing powders deposited by oxy-acetylene powder welding on cast iron substrate grade EN-GJL-200. The mean hardness of deposits A-NiCrSiB, C-NiCrSiB is equal to 908 HV, 399 HV and exceeds those of EN-GJL-200 and X5CrNi18-10 reference specimens 197 HV and 209 HV, respectively. To study CE, the vibratory apparatus has been used and tests were conducted according to the ASTM G32 standard. Cavitation eroded surfaces were examined using a profilometer, optical and scanning electron microscopy. The research indicated that the CE resistance, expressed by the cumulative mass loss decreased in the following order C-NiCrSiB > A-NiCrSiB > X5CrNi18-10 > EN-GJL-200. Therefore, hardfacings were characterised by lower cumulative mass loss, in turn, higher CE resistance than the reference sample and therefore they may be applied as layers to increase resistance to cavitation of cast iron machine components. Results indicate that in the case of multiphase materials, hardness cannot be the main indicator for CE damage prediction while it strongly depends on the initial material microstructure. To qualitatively estimate the cavitation erosion damage (CEd) of NiCrSiB self-fluxing alloys at a specific test time, the following factors should be considered: material microstructure, physical and mechanical properties as well as surface morphology and material loss both estimated at specific exposure time. A general formula for the CEd prediction of NiCrSiB deposits was proposed.
Źródło:: Advances in Science and Technology. Research Journal; 2021, 15, 4; 376-386
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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