Temat: flame spraying - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Improving the quality of technological surfaces of machines of composite coatings
Autorzy:: Dyl, T. C.
Starosta, R.
Tematy:: composite coatings
flame spraying
surface finishing
technological quality; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/243120.pdf Link otwiera się w nowym oknie
Opis:: Nickel matrix coatings were sprayed by the Casto-Dyn 8000 torch on a steel substrate, and then subjected to straight turning. Determining of the optimum geometry of indexing is now synonymous with the selection of the optimum shape and dimensions of the insert and of an appropriate holder. According to cutting board, it was selected square, triangular, trigon inserts, made of carbide and of cubic boron nitride (borazon). Machining of nickel-based coatings was carried out for the cutting speed vc = 214 m/min in the case of treatment with borazon inserts, vc = 107 m/min in case of plates treated with tungsten carbide cutting, using the feed f =0.06 mm/rev and the depth of cut ap = 0.3 mm. Metal cutting the surface of steel samples coated with a composite coating containing 15% Al2O3 based on nickel, conducted for the cutting speed vc = 157 m/min when machining with borazon inserts and for vc = 83 m/min inserts with tungsten carbide for feed f = 0.06 mm/rev and depth of cut ap = 0.3 mm. Highly precise finishing of flame spraying composite and alloy coatings was carried out using turning by tool with borazon inserts. Flank (VB) and attack (KB) of turning tool wear while maintaining a constant length of spiral cutting (LSC) were determined. The effect of the shape and grade of inserts upon the geometric structure of the composite coatings and is considered in the paper. The article can determine the shape and grade of inserts is necessary to obtain sufficient quality of the shaft of centrifugal pumps with a composite coating.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The finishing of composite coatings in aspect of surface roughness reduction
Autorzy:: Dyl, T. C.
Tematy:: composite coatings
flame spraying
cutting inserts
surface finishing; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/242029.pdf Link otwiera się w nowym oknie
Opis:: The influence of the shape and grade of inserts upon the geometric structure of the composite coatings Ni-5%Al- 15%Al2O3 and alloy coatings of Ni-5% Al is considered in the paper. Nickel matrix coatings were sprayed by the Casto-Dyn 8000 torch on a steel substrate, and then subjected to straight turning. Determining of the optimum geometry of indexing is now synonymous with the selection of the optimum shape and dimensions of the insert and of an appropriate holder. According to cutting board it was selected square, triangular, trigon inserts, made of carbide and of cubic boron nitride (borazon). Machining of nickel-based coatings was carried out for the cutting speed vc = 214 m/min in the case of treatment with borazon inserts, vc = 107m/min in case of plates treated with tungsten carbide cutting, using the feed fn=0.06mm/rev and the depth of cut ap = 0.3 mm. Metal cutting the surface of steel samples coated with a composite coating containing 15% Al2O3 based on nickel, conducted for the cutting speed vc = 157 m/min when machining with borazon inserts and for vc = 83 m/min inserts with tungsten carbide for feed fn = 0.06 mm/rev and depth of cut ap = 0.3 mm. Highly precise finishing of flame spraying composite and alloy coatings was carried out using turning by tool with borazon inserts. Flank (VB) and attack (KB) wear coefficient of inserts while maintaining a constant spiral cutting length (SCL) were determined. Important elements parts (such as engines, pumps, centrifugal separators) are regenerated during long-term utilization. This paper proposes the use of regenerated technology subsonic flame thermal spraying and surface finishing by turning composite and alloy coatings of ship machinery parts.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The study of linear correlation between surface roughness parameters and adhesion of flame sprayed coatings
Autorzy:: Mikuliszyn, J.
Starosta, R.
Tematy:: flame spraying
adhesion
roughness parameters
Ni-5%Al coating
correlation; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/246506.pdf Link otwiera się w nowym oknie
Opis:: Adhesion is one of the reasons for limiting the use of thermally sprayed coatings. Many factors influence the adhesion of thermally sprayed coatings, for example: quality of the workmanship of surface preparation, method of thermal spraying, processing parameters, and the temperature of the preliminary preheat substrate, properties of the substrate and coating materials. Another one is the surface roughness. Attempts are made to use surface roughness parameters (e.g. Ra, Rz, Rq, Rku, Rsk) for prediction of adhesion of thermally sprayed coatings. However, most often these attempts end in failure. This article discusses the task of assessing the linear correlation between the twelve parameters of roughness or material ratio of various surface profiles and strength bond of coatings. For analysis, the following parameters were selected: Rz, Ra, Rq, Rsk, Rt, RSm, Rp, Rv, Rku, Rmr (50%), Rk, Rpk, Rvk. The steel substrates (S185) were machined by abrasive machining. The surface roughness of the steel substrate ranged Rz = 1.89-5.34 mm. Nickel-based coatings were applied by flame spraying by the Casto Dyn DS 8000 torch. Adhesion of coatings was measured by pull – off method. The flame sprayed coatings were characterized by adhesion to the steel substrate in the range of from 5.53 MPa to 8.28 MPa. The highest value of the correlation coefficient (Pearson – R)between parameters Rp, Rpk, and adhesion of thermally sprayed coatings were found. The coefficient R was equalto the 0.83, and the coefficient of determination R2 = 0.7. The lowest value of the correlation coefficient was found for the Rku roughness parameter amounting to 0.37. In the measurements carried out, it can be concluded that the prediction of adhesion of the coatings according to the roughness of the substrate, should be carried out by use the parameters characterizing the peaks height of roughness profile.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Effect of finishing on the corrosion properties of flame sprayed Ni-5%Al and Ni-5%Al-Al2O3 coatings
Autorzy:: Charchalis, A.
Starosta, R.
Tematy:: flame spraying
composite coating
Ni-Al
burnishing
corrosion
potentiodynamic test
EIS test; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/247338.pdf Link otwiera się w nowym oknie
Opis:: The Ni-5%Al alloy and Ni-5% Al-Al2O3 composite coatings were obtained by a flame spraying method, “Casto- Dyn DS 8000” torch was used. The coatings onto a substrate made of austenitic stainless steel (X5CrNi18-10) were sprayed. The coatings were subjected to turning, burnishing and grinding. The evaluation of corrosion properties were based on the measurements of direct current (potentiodynamic method) and the alternating current (EIS method). Corrosion tests were performed in a 3.5% sodium chloride solution. On the basis of studies, the effect of finishing type on the corrosion properties of flame sprayed coatings has been demonstrated. The lowest corrosion current density was found for Ni-5%Al coatings after burnishing, icorr value equal to 0.76 μA/cm2, and the charge transfer resistance was 31063 Ω/cm2. The lowest resistance to corrosion of grinded Ni-5%Al-Al2O3 composite coatings was observed. These coatings were characterized by the following parameters of corrosion process: icorr = 14.01 μA/cm2, Rct = 3260 Ω/cm2. Burnishing caused increased corrosion resistance of both coatings. Due to reduced roughness and waviness are obtained reduction of the area of the actual burnished coatings compared to turned coatings. Thus, it is resulting in reduced values of corrosion current density. After finishing treatment, the thermally sprayed Ni-5%Al-15%Al2O3 coatings characterized by lower corrosion resistance compared to the alloy coating. The presence of the reinforcing phase in the coating promotes the increase of the porosity. Burnishing does not cause a significant change in porosity of the coating. The flame sprayed coatings on nickel-based have a tendency to localized corrosion in seawater environment.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Obróbka wykańczająca natryskiwanych płomieniowo powłok Ni-Al, ocena zużycia borazonowych płytek skrawających
Finishing of flame sprayed Ni-Al coatings and an estimate of CBN insert wear
Autorzy:: Starosta, R.
Dyl, T.
Tematy:: natryskiwanie płomieniowe
powłoki Ni-Al
CBN
flame spraying
Ni-Al coatings
CBN insert; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/189040.pdf Link otwiera się w nowym oknie
Opis:: Obróbkę wykańczającą natryskiwanych płomieniowo powłok Ni-5%Al prowadzono poprzez bardzo dokładne toczenie wzdłużne za pomocą noży tokarskich wyposażonych w borazonowe płytki skrawające. W pracy wyznaczono szerokość pasma zużycia powierzchni przyłożenia i natarcia ostrza noża tokarskiego dla kwadratowej i trygonalnej płytki skrawającej przy zachowaniu stałej spiralnej długości skrawania.
Highly accurate finishing of flame spraying Ni-5%Al coatings was carried out using sliding turning by tool with CBN cutting inserts. Flank (VB) and attack (KB) wear indexes of square and trigonal cutting inserts while maintaining a constant spiral cutting length (SCL) were determined.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Study of the thermally sprayed Zn coatings in the context of use in special purpose articles
Autorzy:: Bober, M.
Milczarek, R.
Żubrowski, M.
Sokołowski, W.
Tematy:: natryskiwanie płomieniowe
powłoka cynkowa
powłoka natryskiwana cieplnie
flame spraying
zinc coating
thermally sprayed coating; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/115030.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the results of operational tests of thermal sprayed zinc coatings of various thicknesses on non-alloy steel substrates. The resistance of coatings to: variable temperature cycles, increased ambient humidity, salt fog as well as the electrical resistance of the coating and its adhesion to the steel substrate were tested. It has been shown that Zn coatings has a high corrosion resistance in various atmospheric conditions and have satisfactory properties so they can be protective layers of machine parts used in the armaments industry.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Texture of surface of coatings obtained using the "Casto-Dyn 8000",torch, after burnishing treatment
Autorzy:: Starosta, R.
Tematy:: flame spraying
burnishing
Ni-Al coating
Ni-Al-Al2O3 coating
torque pump; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/245991.pdf Link otwiera się w nowym oknie
Opis:: The flame sprayed coatings are characterized by porosity, oxide inclusions presence and large real area of surface. In order to obtain adequate surface roughness coatings must be applied finishing. For this purpose, the turning and grinding are used. In the paper a burnishing to finishing flame sprayed coatings was proposed. Burnishing is not used during the processing of thermally sprayed coatings, as is commonly believed that this technology causes damage to coatings. The process of flame sprayed is a technology affordable and easy to implement. It does not require great skill of the operator. This method is not associated with expensive workstation equipment. It may therefore be used with success for the regeneration of machine parts by the crew of vessel engine room. Coatings of Ni-5% Al and Ni-5%Al-15%Al2O3 obtained by powder flame spraying were studied. Torch of "Casto-Dyn 8000" was used. After turning the average value of surface coatings roughness coefficient Ra =2.59 mi m (for Ni- 5%Al) mi m and Ra = 3.1mi m (for composite coating) was obtained. SRMD burnishing tool produced by "Yamato" company was used. Roller burnishing was performer on turning lathe. It was found that the increase in burnishing force and the reduction of burnishing speed and feed rate of less roughness of coatings are obtained. For Ni-5%Al coatings the lowest surface roughness, Ra = 0.3mi m was obtained after burnishing with the following parameters: the force - 1100 N, burnishing speed - 28m/min, feed - 0.08 mm/rev. During burnishing of Ni-5% Al-15% Al2O3 coatings applied force 700 N, Ra = 1.31 mi m was obtained. Greater burnishing force caused coatings damage. Burnishing compared to turning has positive influence on the curve shape of the material ratio. It was found that the parameters Rk and Rpk were reduced.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Adhesion of the powder flame sprayed coatings using Fe-Cr-Co-Mo powder
Autorzy:: Rzeźnikiewicz, A.
Cetnarowski, P.
Tematy:: natryskiwanie płomieniowo-proszkowe
powłoka natryskiwana
siła przyczepności
modyfikacja powierzchni
powder flame spraying
spraying coating
adhesion strength
surface modification; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/115133.pdf Link otwiera się w nowym oknie
Opis:: The aim of the research was to assess the adhesion of the powder flame sprayed coatings to the previously prepared substrate. The spraying tests were carried out using Rototec 51000 base powders which was Ni-Al-Mo alloys, then coated with an outer coating made of Rototec 19404, which is an alloy Fe-Cr-Co-Mo. The coatings were tested for adhesion in accordance with the PN-EN ISO 14916:2017 standard and also topography tests of sprayed coatings using scanning electron microscopy.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Combined study of wear phenomena using steel wheel abrasion test
Kompleksowe studium zjawisk zużycia z zastosowaniem testu ścieralności
Autorzy:: Zdravecká, E.
Marton, M.
Tkáčová, J.
Trpčevská, J.
Kelemen, M.
Tematy:: abrasive wear
three-body abrasion
HVOF
flame spraying
surface flame melting
zużycie ścierne
ścieranie z trzecim ciałem
metalizacja natryskowa
płomieniowe nadtapianie powierzchni; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/971604.pdf Link otwiera się w nowym oknie
Opis:: In the present work, thermally sprayed tungsten carbide-based coatings deposited by methods of high velocity oxy-fuel (HVOF) and also flame spraying (FS) combined with surface flame melting (SFM) were studied. Different powders and spraying systems were used to evaluate abrasive wear resistance of thermally sprayed coatings. Steel Wheel Abrasion Test (SWAT) has been applied to test setup for three-body abrasion. The wear rates were sensitive to the microstructure of the coatings. Studied coatings show wear behavior depending on the bond strength of carbide particles to the binder and also the size of carbides and type of binder. Relatively uncomplicated application and good abrasive resistance of deposited coatings are the main factors that contribute to implementation of SFM method into practice.
W prezentowanej pracy wykonano badania powłok na bazie węglika wolframu nanoszonych metodami termicznymi za pomocą szybkościowego napawania tlenowo-gazowego (HVOF) i metalizacji natryskowej (FS) połączonych z płomieniowym nadtapianiem powierzchni (SFM). Dla oceny odporności na zużycie ścierne powłok nanoszonych metodami termicznymi zostały użyte różne proszki i różne systemy metalizacji. Zastosowano test zużycia ściernego ze stalową rolką (SWAT) do badań ścieralności z trzecim ciałem. Wartość intensywności zużywania były zależne od mikrostruktury powłok. Na zachowania zużyciowe testowanych powłok wpływa wytrzymałość wiązań cząstek węglików z żywicą, a także rozmiar cząstek i rodzaj żywicy. Stosunkowo prosta aplikacja i dobra odporność na ścieranie są czynnikami, które przyczyniają się do praktycznego zastosowania metody SFM.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Structure and mechanical properties of cermet Ni-Al/MSZ thick coating prepared by flame spraying technique
Struktura i właściwości mechaniczne grubowarstwowej powłoki cermetalowej Ni-Al/MSZ przygotowanej techniką natrysku płomieniowego
Autorzy:: Saleh, Mahmood M.
Khemakhem, Hamadi
Jassim, Ismel K.
Al-Saqa, Read Hashim
Tematy:: cermet coating
flame spraying
MgO-ZrO2
carbon steel
self-bonding Ni-Al
powłoka cermetalowa
natryskiwanie płomieniowe
stal węglowa
samospiekający się Ni-Al; Pokaż więcej
Wydawca:: Wydawnictwo SIGMA-NOT
Powiązania:: https://bibliotekanauki.pl/articles/57287342.pdf Link otwiera się w nowym oknie
Opis:: The aim of this study was to obtain a thick protective cermet coating on API 5L (carbon steel) pipes, used in the oil industry. A new method involving flame spray coating has been selected to produce thick ceramic-metal coatings of Ni-Al/MgO-ZrO2 under optimal spraying parameters. Structural properties were measured by X-ray diffraction (XRD). Morphology was determined by means of scanning electron microscopy (SEM). The elemental composition in the cermet coating was confirmed by energy dispersive spectroscopy (EDS). Deposition efficiency was found to be an important factor as demonstrated by adhesion force results obtained using the pull-out tensile test. The results show that the best spray distance is 20 cm, as it ensures good interaction between the layers, a high adhesion force value of 8.4 MPa, a uniform microstructure, low porosity, a hardness of 166.4 HV, and a coating thickness of approximately 1.85 mm. X-ray results clearly show that the cermet coating consists of numerous phases, such as tetragonal (T), monoclinic, and face center cubic (FCC). SEM images revealed that the typical particle-containing microstructures consisted of spherical shapes with elongated agglomerations. Finally, based on the results obtained, it can be concluded that flame spray coating provides a significant improvement in performance.
Celem pracy było uzyskanie grubej ochronnej powłoki cermetalowej na rurach API 5L (ze stali węglowej), stosowanych w przemyśle naftowym. Wybrano nową metodę natryskiwania płomieniowego w celu wytworzenia grubych powłok ceramiczno-metalowych Ni-Al/MgO-ZrO2 przy optymalnych parametrach natryskiwania. Właściwości strukturalne zostały zmierzone za pomocą dyfrakcji rentgenowskiej (XRD). Morfologię określono za pomocą skaningowej mikroskopii elektronowej (SEM). Skład pierwiastkowy powłoki cermetalowej ustalono, używając spektroskopii dyspersji energii (EDS). Stwierdzono, że wydajność osadzania jest ważnym czynnikiem, o czym świadczą wyniki pomiaru siły adhezji uzyskane w próbie rozciągania. Z badań wynika, że najlepsza odległość natryskiwania wynosi 20 cm – zapewniona jest wówczas dobra interakcja między warstwami, wysoka wartość siły adhezji: 8,4 MPa, jednolita mikrostruktura, niska porowatość, twardość wynosi 166,4 HV, a grubość powłoki ok. 1,85 mm. Badania rentgenowskie pozwoliły ustalić, że powłoka cermetalowa składa się z wielu faz: tetragonalnej (T), jednoskośnej i FCC. Obrazy SEM ujawniły, że typowe mikrostruktury zawierające cząstki składały się z kulistych struktur tworzących wydłużone aglomeracje. Na podstawie uzyskanych wyników można stwierdzić, że zastosowana metoda natryskiwania płomieniowego zapewnia znaczną poprawę właściwości ochronnych.
Dostawca treści:: Biblioteka Nauki

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