Wyniki wyszukiwania - BazTech

1

Sliding wear examination of new protecting coatings on railway buffer heads

Gamon Wojciech

Journal of KONBiN

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2019

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Vol. 49, iss. 4

401--419

EN

The paper presents the results of tests of sliding wear of bronze coatings made on the surface of specimen made of S355J2 steel by laser cladding method. On the basis of the conducted tests it was found that the wear of the specimens with CuAl9Fe3 bronze coating is characterized by average values which are close to lubricated specimens. In addition, the registration of friction coefficients of particular couples showed very similar characteristics of these two friction couples and friction coefficient values at a very similar level. This allows to assume that the currently used method of protecting railway buffer heads, consisting of periodically covering their surface with lubricant, can be replaced with another, more durable, based on bronze protection coatings.

PL

W artykule przedstawiono wyniki badań zużycia ściernego powłok z brązów wytworzonych na powierzchni próbek wykonanych ze stali S355J2 metodą napawania laserowego. Na podstawie badań stwierdzono, że zużycie próbek z napoinami z brązu CuAl9Fe3 cechuje się wartościami średnimi zbliżonymi do próbek smarowanych. Ponadto, rejestracja współczynników tarcia poszczególnych skojarzeń wykazała bardzo zbliżone charakterystyki tych dwóch par ciernych oraz wartości współczynników tarcia na bardzo podobnym poziomie. Pozwala to na założenie, że obecnie stosowana metoda zabezpieczania zderzaków kolejowych, polegająca na okresowym pokrywaniu ich powierzchni smarem, może zostać zastąpiona inną, trwalszą, bazującą na wykonywaniu powłok zabezpieczających z brązów.

2

Microstructural and Tribological Characterization of Aluminium Bronzes with Additions of Si and Cr

Pisarek B. P., Kowalski B., Atapek H., Polat Ş., Tüfekçi T.

Archives of Foundry Engineering

|

2018

|

Vol. 18, iss. 1

93--98

EN

The article presents the investigation results of the crystallization (performed by means of the TDA method) and the microstructure of complex aluminium bronzes with the content of 6% Al, 4% Fe and 4% Ni, as well as Si additions in the scope of 1–2% and Cr additions in the scope of 0.1–0.3%, which have not been simultaneously applied before. For the examined bronze, the following tests were performed: hardness HB, impact strength (KU2). For bronze CuAl6Fe4Ni4Si2Cr0.3, characterizing in the highest hardness, wear tests were conducted with dry friction and the dry friction coefficient. The investigations carried out by means of the X-ray phase analysis demonstrated the following phases in the microstructure of this bronze: αCu, γ2 and complex intermetallic phases based on iron silicide type Fe3Si (M3Si M={Fe,Cr,…}). Compared to the normalized aluminium bronzes (μ=0.18–0.23), the examined bronze characterizes in relatively low wear and lower friction coefficient during dry friction (μ=0.147±0.016).

3

Napawanie laserowe tarcz zderzaków kolejowych brązem aluminiowym

Sitarz M., Kurc-Lisiecka A., Gamon W.

Stal, Metale & Nowe Technologie

|

2017

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nr 9-10

80--84

PL

W artykule opisano wyniki badań procesu napawania laserowego powierzchni tarcz zderzaków kolejowych ze stali S355J2 proszkiem na bazie brązu aluminiowego. Próby napawania wykonano za pomocą lasera diodowego dużej mocy (HPDL) LDF 4000-30 firmy LaserLine o mocy maksymalnej 4,0 kW. Badania obejmowały również obserwacje metalograficzne wytworzonych warstw, badania ich odporności na zużycie ścierne i pomiary twardości. Stwierdzono, że w wyniku napawania laserowego tarcz zderzaków kolejowych ze stali S355J2 proszkiem brązu CuAl9Fe3 i laserem diodowym HPDL możliwe jest wykonanie wysokiej jakości napoin bez nieciągłości strukturalnych i o korzystnej, drobnoziarnistej strukturze dendrytycznej w obszarze napoiny. Wykazano również, że napawanie laserowe brązem aluminiowym zapewnia znaczący wzrost odporności na zużycie ścierne powierzchni czołowych tarcz zderzaków kolejowych i pozwala na wyeliminowanie konieczności okresowego ich smarowania.

EN

The paper presents the results of the study of the laser powder cladding of railway buffers heads made of the S355J2 steel by aluminium bronze-based powder. The high power diode laser (HPDL) LDF 4000-30, produced by LaserLine, with the maximum output power of 4.0 kW, was used for the cladding trials. The investigations included also the metallographic observations of the clad layers, wear behaviour and hardness measurements. It was found that it is possible to produce high-quality clad layers of the aluminium bronze CuAl9Fe3 on the steel substrate, without any internal imperfections, such as voids or structural discontinuities, and characterized by fine-grained dendritic structure in the fusion zone of the clad. It was also shown that the laser cladding of aluminium bronze provides a significant increase of wear resistance of buffer working surfaces and can also eliminate the need of periodical greasing of these surfaces.

4

Operational Research of Wear of Railway Buffers Heads Covered with Aluminum Bronze

Gamon W.

Logistics and Transport

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2017

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Vol. 36, No. 4

63--68

EN

In recent years in Europe and in Poland a discernible trend of significant increase safety in rail transport can be observed. Safety improvement is realized at many levels and in many aspects (organizational, systematic, technical etc.). Implementation of Safety and Maintenance Management Systems are an example of activities seeking to systematically increase safety in rail in Europe. Similarly, on the part of technical solutions, there are discernible activities which are aimed at improving the safety level. There offer new construction solutions, new control systems or new communication technologies which are designed to increase reliability and safety of this mode of transport. For innovations introduced in vehicles, almost only improving safety in the field of implementing enhancements in construction of running gear systems of vehicle used to be thought about. However, it is worth remembering that not only the bogie, wheel set or wheels are responsible for the proper cooperation of the vehicle with the track and its safe running. Elements that have not been yet subjected to deeper analyzes are railway buffers whose proper maintenance and cooperation is a guarantee of correct vehicle dynamics, especially when passing through rail curves. This article presents the results of operational research of railway buffers whose heads were covered with an aluminium bronze layer. This solution has helped to increase the durability of their co-operating surfaces, and has allowed the resignation of the now-proposed solution, which consists in periodically covering buffers heads with the grease which has a lot of defects.

5

Tribological Characterization of Al-bronzes Used as Mold Materials

Atapek Ş. H., Aktaş Çelik G., Polat Ş., Pisarek B.

Archives of Foundry Engineering

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2017

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Vol. 17, iss. 4

7--12

EN

Among the copper based alloys, Cu-Al-X bronzes are commonly used as mold materials due to their superior physical and chemical properties. Mold materials suffer from both wear and corrosion, thus, it is necessary to know which one of the competitive phenomenon is dominant during the service conditions. In this study, tribo-corrosion behavior of CuAl10Ni5Fe4 and CuAl14Fe4Mn2Co alloys were studied and electrochemical measurements were carried out using three electrode system in 3.5 % NaCl solution in order to evaluate their corrosion resistance. In tribo-corrosion tests, alloys were tested against zirconia ball in 3.5 % NaCl solution, under 10N load with 0.04 m/s sliding speed during 300 and 600 m. The results indicate that (i) CuAl10Ni5Fe4 alloy is more resistant to NaCl solution compared to CuAl14Fe4Mn2Co alloy that has major galvanic cells within its matrix, (ii) although CuAl10Ni5Fe4 alloy has lower coefficient of friction value, it suffers from wear under dry sliding conditions, (iii) as the sliding distance increases, corrosion products on CuAl14Fe4Mn2Co surface increase at a higher rate compared to CuAl10Ni5Fe4 leading to a decrease in volume loss due to the lubricant effect of copper oxides.

6

Granulation of Cu-Al-Fe-Ni Bronze

Pisarek B. P.

Archives of Foundry Engineering

|

2014

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Vol. 14, iss. 3

61--66

EN

With the increase in wall thickness of the casting of iron-nickel-aluminium-bronze, by the reduction of the cooling rate the size of &κII phase precipitates increases. This process, in the case of complex aluminium bronzes with additions of Cr, Mo and W is increased. Crystallization of big κII phase, during slow cooling of the casting, reduces the concentration of additives introduced to the bronze matrix and hardness. Undertaken research to develop technology of thick-walled products (g> 6 mm) of complex aluminium bronzes. Particular attention was paid to the metallurgy of granules. As a result, a large cooling speed of the alloy, and also high-speed solidification casting a light weight of the granules allows: to avoid micro-and macrosegregation, decreasing the particle size, increase the dispersion of phases in multiphase alloys. Depending on the size granules as possible is to provide finished products with a wall thickness greater than 6 mm by infiltration of liquid alloy of granules (composites). Preliminary studies was conducted using drip method granulate of CuAl10Fe5Ni5 bronze melted in a INDUTHERM-VC 500 D Vacuum Pressure Casting Machine. This bronze is a starting alloy for the preparation of the complex aluminium bronzes with additions of Cr, Mo, W and C or Si. Optimizations of granulation process was carried out. As the process control parameters taken a casting temperature t (°C) and the path h (mm) of free-fall of the metal droplets in the surrounding atmosphere before it is intensively cooled in a container of water. The granulate was subjected to a sieve analysis. For the objective function was assume maximize of the product of Um*n, the percentage weight "Um" and the quantity of granules 'n' in the mesh fraction...

7

Feeding and Cooling and Time of Thermal Treatment of a Massive Bush Made of the Complex Aluminum Bronze Cast by the Lost Foam

Just P., Pisarek B. P.

Archives of Foundry Engineering

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2014

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Vol. 14, iss. 4

39--44

EN

Small additions of Cr, Mo and W to aluminium-iron-nickel bronze are mostly located in phases &kappa i (i=II; III; IV),and next in phase &alpha (in the matrix) and phase γ2. They raise the temperature of the phase transformations in aluminium bronzes as well as the casts’ abrasive and adhesive wear resistance. The paper presents a selection of feeding elements and thermal treatment times which guarantees structure stability, for a cast of a massive bush working at an elevated temperature (650–750°C) made by means of the lost foam technology out of composite aluminium bronze. So far, there have been no analyses of the phenomena characteristic to the examined bronze which accompany the process of its solidification during gasification of the EPS pattern. There are also no guidelines for designing risers and steel internal chill for casts made of this bronze. The work identifies the type and location of the existing defects in the mould’s cast. It also proposes a solution to the manner of its feeding and cooling which compensates the significant volume contraction of bronze and effectively removes the formed gases from the area of mould solidification. Another important aspect of the performed research was establishing the duration time of bronze annealing at the temperature of 750°C which guarantees stabilization of the changes in the bronze microstructure – stabilization of the changes in the bronze HB hardness.

8

Wpływ modyfikacji węglikiem wapnia na wlaściwości mechaniczne brązu BA 1044

Górny Z., Kluska-Nawarecka S., Saja K.

Prace Instytutu Odlewnictwa

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2012

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T. 52, z. 4

5-16

PL

Badano wpływ przesycania z chłodzeniem mikrostrumieniowym w czasie przesycania oraz modyfikowania C + Ca i CaC2 stopu BA1044 w stanie lanym, przesycanym i ulepszanym cieplnie. Modyfikowanie oraz przesycanie są wyraźnie korzystne w stanie ulepszonym cieplnie dla Rp0,2. Wyżarzanie wysokotemperaturowe pozwala na uzyskanie wyższych wła- ściwości plastycznych, a nisokotemperaturowe wyższych właściwości wytrzymałościowych.

EN

The effect of solution heat treatment with jet cooling and modification with C + Ca and CaC2 on the behaviour of BA1044 alloy in as-cast state, and after solution heat treatment and toughening was examined. The microjet modification and solution heat treatment are clearly beneficial for the Rp0,2 in quenched and tempered state. High-temperature annealing enables obtaining higher plastic properties, while low-temperature annealing improves the mechanical properties.

9

New high materials for machinery and foundry devices

Pietrowski S.

Archives of Metallurgy and Materials

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2010

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Vol. 55, iss. 3

905-914

EN

This paper presents the details rules of material selection predicted for machine parts. Hardness of most applied materials and layers manufactured by PVD method were given. The basic characteristics of new materials selected from alloys group: iron, cooper, aluminum were presented. Revealed its high wear resistance, corrosion resistance and significant mechanical properties.

PL

W pracy przedstawiono uszczegółowione zasady wyboru materiału na części maszyn, podano twardość najczęściej stosowanych materiałów i powłok osadzanych metodami PVD. Przedstawiono podstawową charakterystykę nowych materiałów z grupy stopów: żelaza, miedzi i aluminium. Wykazano ich wysoka odporność na zużycie, korozje oraz znaczne własności wytrzymałościowe.

10

Influence of metallic die temperature in the solidification of Cu-10%Al-2%Fe alloy

Cenoz I.

Archives of Metallurgy and Materials

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2010

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Vol. 55, iss. 4

1029-1033

EN

The phases obtained in copper aluminium bronze alloy (Cu-Al10-Fe2) cast into a permanent die were investigated. The parameters examined were the pre-heating temperatures of the die and the graphite coating thickness. The phases α and γ2 were detected as well as the metastable phases β' and γ'. The intermetallics of the system Fe-Al were obtained in various stoichiometric compositions. The different cooling rates of the casting resulted in two mechanisms of transformation to α grains out of the unstable β phase, one being nucleation and growth producing needle shaped α grains, the other exhibiting a massive transformation to spherical α grains. These two mechanisms determine the changes in the size of the α grains as a result of changes in the cooling rate in its various ranges.

PL

Zbadane zostały fazy brązu aluminiowego (Cu-Al10-Fe2) odlewanego ciśnieniowo w sposób ciągły. Kontrolowanymi parametrami była temperatura wstępnego ogrzewania kokili oraz grubość powłoki grafitowej. Stwierdzono występowanie faz α i γ2, metastabilnych faz β' oraz γ', podobnie jak stechiometrycznych faz międzymetalicznych o różnych składach z układu Fe-Al. Różne prędkości chłodzenia odlewu powodowały występowanie dwóch mechanizmów transformacji fazy α, nie związanych z niestabilną fazę β - jednego w formie zarodkowania i wzrostu igiełkowatych ziaren α oraz drugiego, poprzez występowanie masywnej przemiany do kulistych ziaren ?. Mechanizmy te wywoływały zmiany wielkości α - ziaren jako rezultat zmian szybkości chłodzenia ustalanego w różnych zakresach.

11

The influence of heat treatments on cavitation erosion resistance of BA1055 alloy

Jasionowski R., Przetakiewicz W., Zasada D., Czorna S.

Archives of Foundry Engineering

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2009

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Vol. 9, iss. 4

81-86

EN

The cavitation erosion is a process of material deterioration as a result of materialization, increase and decrease of the cavitation bubbles in different types of liquid. The cavitation erosion materials are used to prevent the devastating effect of imploding bubbles. The aluminium bronze BA1055 is the most commonly used material among the cooper alloys used on the parts of machines exposed to cavitation erosion phenomenon. The following article brings up the study of the effects of bronze BA1055 heat treatment for its cavitation erosion resistance performed on a flux-impact measuring device. The conducted studies confirmed the extension of the incubation process of BA1055 alloy after the hardening in relation to the moulded alloy. It has resulted in the increase of the resistance to cavitation erosion.

12

Evaluation of exploitive characteristics BA1032 alloy after TIG welding method treatment

Lipiński T., Cudakiewicz M., Wach A., Mikołajczyk P.

Diagnostyka

|

2008

|

nr 4(48)

119-122

EN

The aim of this study was to make the diagnosis of the operating conditions of aluminium bronze BA 1032. Current intensity was selected on an experimental way to assure of stable melting of the surface layer together with inserted components at small current intensity. The examined questions were: the influence of surface treatment of aluminium alloy onto structure by collected energy source; the geometric parameters of the surface melted by TIG welding method of bronze surface plated alloy ingredients by using different current parameters. The results of this study indicate that the thermic exposure value, it means: the sort of concentrated energy source as well as its speed, as well as the sort of alloy additives have an influence on exploitation parameters of tested samples.

PL

Celem pracy była diagnostyka właściwości eksploatacyjnych brązu aluminiowego BA1032. Próbki do badań pobierano z obszaru ustabilizowanego oddziaływaniem skupionego źródła ciepła (stała, ustabilizowana szerokość strefy wpływu ciepła). Natężenie prądu dobrano eksperymentalnie zapewniając stabilne przetopienie warstwy powierzchniowej wraz z wprowadzanymi składnikami przy realnie małym jego natężeniu. Z analizy wyników badań wynika, że zarówno wartość ekspozycji cieplnej, tj. rodzaj zastosowanej energii źródła skupionego ciepła, prędkość jego przemieszczania jak i rodzaj dodatków stopowych wpływają na parametry eksploatacyjne obrobionych elementów.

13

Napawanie plazmowe brązu aluminiowego proszkiem na osnowie niklu

Klimpel A., Czupryński A., Górka J., Stryjkowski J.

Biuletyn Instytutu Spawalnictwa w Gliwicach

|

2008

|

R. 52, nr 2

26-30

PL

Przedstawiono wyniki badań procesu napawania plazmowego (PTA - Plasma Transferred Arc) powierzchni roboczych odlewów z brązu aluminiowego proszkiem na osnowie niklu w pozycji podolnej. Określono optymalne parametry napawania proszkowego PTA ściegami prostymi i z ruchem wahadłowym palnika. Wykazano, że w celu zapewnienia wysokiej jakość napoin jedno- i wielowarstwowych konieczne jest podgrzewanie wstępne podłoża przed napawaniem oraz dokładne czyszczenie podłoża oraz poszczególnych ściegów napoin.

EN

The results of investigations into PTA process of weld overlaying of working surfaces on aluminium bronze castings with nickel based powder, in flat position, are presented. The optimum parameters of PTA surfacing with string beads and with weave-bead technique have been determined. It has been shown that in order to provide high quality single- and multi- pass welds it is necessary to preheat and to clean accurately the parent material before welding operation as well as to clean the individual surfacing beads equally well.

14

Badanie fazy żelazowej w brązie aluminiowo-żelazowo-manganowym BA1032

Romankiewicz F., Romankiewicz R.

Archiwum Technologii Maszyn i Automatyzacji

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2007

|

Vol. 27, nr 1

87-91

PL

Badania fazy żelazowej w brązie aluminiowo-żelazowo-managanowym BA1032 wykazały złożony skład chemiczny wydzieleń tej fazy. Zawiera ona przeważnie 50-60% Fe, 25-35% Cu, 2-3% A1, 2-4% Mn i 3-6% Si.

EN

Studies of ferric phase on bronze BA1032 revealed complex chemical constitution of compounds in this phase. It usually contains of 50-60% Fe, 25-35% Cu, 2-3% AL, 2-4% Mn and 3-6% Si.

15

The crystallisation of the aluminium bronze with additions of Si, Cr, Mo and/or W

Pisarek B. P.

Archives of Materials Science and Engineering

|

2007

|

Vol. 28, nr 8

461-466

EN

Purpose: The aim of this paper is description of the process of the crystallization of new aluminium bronzes with the complex silicides of the iron. Design/methodology/approach: Additions Cr, W, Mo and Si were introduced to create in the microstructure of the aluminium bronze of the complex silicides of the iron about high mechanical and physical proprieties to the bronze BA1044. The process of formation the microstructure of the bronze with use of the method of the thermal and derivative analysis (TDA) was analysed. The examinations under the microscope and X-ray microanalysis of the surface distribution of elements were conducted. Findings: From carried research results, that in the aluminium bronze BA1044 after addition Si, Cr, Mo and/or W the phase κ Fe, κ Ni crystallize as the complex silicides of the iron. Elements such as: Fe and Si dissolve first of all in silicides in the smaller stage in the matrix of the bronze, Mn and Ni they dissolve in matrix and silicides, Cr dissolves in the larger stage in silicides than in the matrix, W and Mo dissolve in silicides however they crystallize as nanocrystals in the metal matrix and create with her composite. Research limitations/implications: Results of investigations of aluminium bronze BA1044 and alloys after adding to him about 1% Si were introduced in the article and suitably: 1.22 % C; 0.82 % Mo; 0.020 % W; 0.60 % Cr, 0.17 % Mo and 0.017 % W. Originality/value: The original results of the investigations of the crystallization of the new bronzes (innovative materials and casting technologies) for which the process of arising microstructure the method TDA was not analysed so far were introduced in the article. The article possesses cognitive values not only essential for researcher but and practician-melters.

16

Influence Cr on crystallization and the phase transformations of the bronze BA1044

Pisarek B. P.

Archives of Foundry Engineering

|

2007

|

Vol. 7, iss. 3

129-136

EN

The investigations were introduced in the paper, method of thermal and derivative analysis (TDA), the process of crystallization and phase transformation in the solid state of the aluminium bronze CuA110Fe4Ni4 (BA1044) and with the addition 0.3 % Cr. Two intermetallic phase were identified in the microstructure of the bronze BA1044: [kappa]Fe1-- rich in Fe and Cu and [kappa]Fe2 - rich in Fe, and in the microstructure of the bronze BA1044+0.3 % Cr only one phase [kappa]Fel - rich in Fe, Cu and Cr. The presence of chrome in the bronze BA1044 reduce size the primary crystals of the phase [beta], reduces the dynamics of the processes of thermal phase transformation in the solid state and lengthens the time their of duration.

17

Napawanie brązu aluminiowego metodą GMA drutem proszkowym metalicznym na osnowie niklu

Klimpel A., Bulski Z., Mazur M., Janicki D.

Biuletyn Instytutu Spawalnictwa w Gliwicach

|

2003

|

R. 47, nr 6

37--41

PL

Przedstawiono wyniki prób napawania metodą GMA brązu aluminiowego drutem proszkowym metalicznym na osnowie niklu typu EnDoTec DO*83 firmy CASTOLIN, w pozycji podolnej. Określono optymalne parametry napawania ściegami prostymi i ściegami szerokimi z ruchem wahadłowym palnika. Wykazano, że w celu zapewniania wysokiej jakości napoin jedno- i wielościegowych konieczne jest dokładne oczyszczenie poszczególnych ściegów lub zastosowanie techniki napawania z ruchem wahadłowym palnika.

EN

There are presented the test results of GMA surfacing of aluminium bronze with nickel based tubular metal - filled wire of EnDoTec Do*83 type, manufactured by CASTOLIN, in flat position. It has been determined the optimum parameters of string-bead welding and wide type weave-bead welding. It has been shown that in order to provide high quality single- or multi-pass welds it is necessary to clean thoroughly particular beads or to apply weave-bead welding technique.

18

Brązy aluminiowe napawane na stalach metodami TIG i plazmą.

Białas K., Białucki P., Kozerski S., Ziemba H.

Rudy i Metale Nieżelazne

|

2002

|

R. 47, nr 6

281-283

PL

Przedstawiono wyniki badań napoin wykonanych ze specjalnego brązu aluminiowego o składzie: 13.9 % Al, 3.6 % Fe, 2.0 % Mn, 3.3 % Ni, reszta Cu. Napoiny nanoszono na podłoża ze stali nisko- i średniowęglowej (St3S i 45) stosując metodę TIG i metodę napawania plazmowego. Wykazano różnice występujące w strukturze napawanych warstw oraz wskazano na możliwości zmian własności tych warstw poprzez obróbkę cieplną.

EN

Results of the examination of the padding welds made from special aluminium bronze with the composition: 13.9 % Al, 3.6 % Fe, 2.0 % Mn, 3.3 % Ni, Cu-the rest, have been presented. The welds were padded on low-carbon and medium-carbon steels (St3S and45) by the TIG and plasma padding methods. The differences observed in a structure of padded layers have been indicated, and the possibilities to change properties of these layers by the heat treatment have been discussed.

19

Deformation processing map for CuAl8.1Fe2.9 aluminium bronze.

Gronostajski Z.

Inżynieria Materiałowa

|

2001

|

R. XXII, nr 4

365-368

PL

Naprężenie uplastyczniające brązu aluminiowego CuAl8.1Fe2.9 wyznaczane w próbie skręcania w szerokim zakresie temperatur i prędkości odkształcania było analizowane przy użyciu dynamicznego modelu materiału. Model ten rozpatruje materiał odkształcany w podwyższonych temperaturach jako dyssypator mocy. Mapa efektywności procesów, reprezentująca dyssypację mocy w funkcji temperatury i prędkości odkształcania, została opracowana i na jej podstawie ustalone zostały obszary w których zachodzą procesy rekrystalizacji dynamicznej i dynamicznego zdrowienia oraz optymalne warunki odksztacania.

EN

The flow stress data obtained in torsion test of CuAl8.1Fe2.9 aluminium bronze at different temperatures and strain rate are analysed using dynamic material's model which considers the workpiece as a power dissipator. A processing map representing the efficiency of power dissipation as a function of temperature and strain rate has been established and areas of dynamic recovery and recrystallization processes as well as optimum processing conditions for the aluminium bronze was determined.

20

Obróbka cieplna brązu aluminiowego krzepnącego pod ciśnieniem

Wierzbicka B.

Krzepnięcie Metali i Stopów

|

2000

|

R. 2, nr 42

117--124

PL

Określono wpływ zabiegu obróbki cieplnej (hartowania i odpuszczania) na mikrostrukturę i twardość HB brązu aluminiowego BA1032 krzepnącego przy oddziaływaniu ciśnienia. Stwierdzono, że zabieg prasowania w stanie ciekłym powoduje na tyle efektywne rozdrobnienie struktury, że może być traktowany jako zamienny zamiast zabiegu ulepszania cieplnego. Natomiast w przypadku konieczności uzyskania silnego umocnienia masywnego odlewu z brązu BA1032, należy łączyć zabieg prasowania i obróbki cieplnej.

EN

There has been described the influence of heat treatment (quench hardening and tempering) on the microstructure and Brinell hardness (HB) of BA1032 aluminium bronze solidified under pressure. It has been stated that pressing operation performed in liquid state causes an effective refinement of the structure to such a degree that the process can be considered as interchangeable with heat treatment. However, when a noticeable hardening of the structure is necessary for a massive casting of BA1032 bronze, both pressing and heat treatment should be applied.