Wyniki wyszukiwania - Biblioteka Nauki

1

Zużycie tribologiczne brązów antymonowych.

100%

Czupryk W.

Zagadnienia Eksploatacji Maszyn

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2001

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tom Vol. 36, nr 4

9-21

PL

W publikacji przedstawiono informacje dotyczące problematyki zużycia brązów antymonowych. Zużycie brązów antymonowych dwu- i wieloskładnikowych w tarciu z udziałem smaru nie przewyższa zużycia brązów cynowych, przyjmuje też mniejsze wartości w zależności od składu brązu. Przyjmując wartość zużycia jako kryterium przydatności nowych materiałów do pracy w tarciu z udziałem smaru, można wskazać na brązy antymonowe jako materiały mogące zastąpić drogie i deficytowe brązy cynowe z zaleceniem użycia ich w postaci wylań cienkowarstwowych.

EN

The publication, in form of a compilation of ealier works by the same author, presents information about the problems of antimony bronzes wear, which can be successfully substituted in certain uses for the more expensive and scarce tin bronzes. Two-component antimony bronze wear in friction with the use of lubricant does not exceed the wear of tin bronzes, and is even lower in many cases, depending on contents of bronze. Introduction of bismuth to antimony bronze and of bismuth as well as nickel was aimed to change the unwanted tendency in wear of steel elements. During tests with two-component antimony bronzes it was found that along with the increase of antimony contents in these bronzes, wear also increased. However, after the introduction of bismuth, no excessive steel wear was found. Nickel as the fourth component of the CuSbBi alloy brings about further reduction of wear of steel elements with a slight increase in bronze wear. Taking the amount of wear as a feasibility criterion of new materials for operation in frictional conditions with the use of lubricant, antimony bronzes can be recommended as alternative materials for tin bronzes, if used in form of thin-layered linings.

2

Investigation on the deformability of tin bronzes CuSn6 modified with zirconium on the industrial hot rolling of flat ingots

100%

Ozgowicz W. , Malec W. , Ciura L.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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tom Vol. 24, nr 1

78-83

EN

Purpose: The basic aim of the investigations was to determine the effect of a microadditions of zirconium on the improvement of the plasticity of tin bronze type CuSn6 and its deformability during the production test of hot rolling of flat ingots. Design/methodology/approach: The principle method of testing the deformability of flat ingots at elevated temperature was rest of their hot rolling under industrial conditions. Findings: In result of the investigations it has been found that a microadditions of zirconium in an amount of about 0.03-0.05% ensures an optimal structure and also a higher plasticity and deformability of industrial bronze type CuSn6 in the temperature range of hot rolling. Research limitations/implications: Attempts of hot rolling permitted only in a limited degree to determine the favourable effects of the modifications of the tested bronze with zirconium. In future these effects ought be verified in other processes of hot plastic working. Practical implications: The investigations proved that the applied technology of rolling is an effective way of hot plastic deformation of flat tin bronze ingots modified with zirconium.

3

Effect of High-tin Bronze Composition on Physical, Mechanical, and Acoustic Properties of Gamelan Materials

100%

Slamet S. , Suyitno S. , Kusumaningtyas I. , Miasa I. M.

Archives of Foundry Engineering

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2021

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tom Vol. 21, iss. 1

137--145

EN

High tin bronze alloy (Cu>17wt.%Sn) is commonly as raw material to fabricate musical instruments. Gamelan musical instruments in Indonesia are produced using tin bronze alloy raw materials. The tin bronze alloy used by each gamelan craftsman has a different tin composition, generally in the range of Cu(20-24) wt.% Sn. This study aims to investigate the effect of microstructure, density, and mechanical properties of Cu(20-24)wt.%Sn against the acoustic properties processed by the sand casting method. The material is melted in a crucible furnace until it reaches a pouring temperature of 1100ºC by the sand casting method. The specimens were subjected to microstructure observations, density and porosity as well as mechanical properties testing including tensile strength, bending strength, hardness, and modulus of elasticity. Mechanical properties data then used to calculate several parameters of acoustic properties including speed of sound (c), impedance (z) and radiation coefficient (R). Processes simulation using Finite Element Analysis (FEA) and Experiment Method Analysis (EMA) were carried out to determine acoustic properties including sound intensity, natural frequency and damping capacity. The experimental result shows that the increase in tin composition in Cu(20-24) wt.% Sn changed the microstructure of coarse grains into dendrite-columned fine grains. Physical properties of density decrease, while porosity increases. Mechanical properties including tensile strength, modulus of elasticity, and bending strength decreased, while the hardness of the alloy increases. The calculation of acoustic parameters such as the speed of sound (c), impedance (z) and radiation coefficient (R) has decreased. Moreover, sound intensity (dB), natural frequency (Hz) and damping capacity also decrease with increasing tin composition. Hence, tin bronze alloy Cu20wt.%Sn is the recommended raw material for the manufacture of gamelan instruments through the sand casting method.

4

Wpływ temperatury spiekania na własności i strukturę spiekanych brązów cynowych

100%

Frydrych H. , Romański A. , Olszewska I.

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tom R. 46, nr 4

181-185

PL

Wykonano badania struktury i własności spieków otrzymanych z trzech różnych proszków brązu cynowego, pochodzących z importu. Zastosowano różne temperatury spiekania. Określono wpływ temperatury spiekania na gęstość i zmiany wymiarowe spieków oraz ich wytrzymałość na zginanie.

EN

The structure and properties of sinters produced at various temperatures, from three different, foreign, tin bronze powders, were analysed. The relations of sintering temperatures, density and bending strength of the sinters were defined.

5

Research of Aluminium Influence on Tin Bronzes

100%

Rzadkosz S. , Garbacz-Klempka A. , Kozana J. , Piękoś M. , Czekaj E. , Perek-Nowak M.

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tom Vol. 15, iss. 1 spec.

93--98

EN

During the research a group of copper and tin alloys was investigated. The influence of variable additions of aluminium within the range of 0.3 – 1.4 wt % was analysed on tin bronze CuSn10 with the aim of obtaining durable bronzes, from outside the normalized copper alloy groups. Melts were conducted in order to obtain alloy samples for testing the chosen properties. Metallographic and SEM-EDS tests were carried out to determine the microstructure changes caused by introducing Al addition to CuSn10 alloy. Also, chosen mechanical properties were tested for the alloys investigated. The results showed considerable changes in the microstructure as well as significant hardening of the Cu-Sn alloys as the result of aluminium addition. The thermal and dilatometric analysis confirmed the presence of phase changes, also their parameters were assessed depending on the share of aluminium addition in the CuSn10. The aluminium additive applied within the range of 0.3-1.4 wt% to CuSn10 bronze clearly impacted the microstructure and the strength properties analysed, causing the increase in strength and hardness with simultaneous insignificant decrease of elongation of the CuSn10Al alloys.

6

Modyfikacja brązu cynowego CuSn10

100%

Romankiewicz F. , Głazowska I. , Reif W.

Krzepnięcie Metali i Stopów

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1998

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tom nr 37

113--118

EN

Investigations on the modification of tin bronze CuSn10 with Zr additive as well as the complex additives consisting of P-Fe-Zr and Mg-P-Fe-Zr revealed the advantageous influence of these reagents on a structure and properties of the alloy. The modification processes caused the apparent grain refinement and as the consequence the increase of tension strenght of about 20% was achieved. Electron microscopy examinations allowed to identificate heterogeneous crystallization nuclea and to determinate the elements which formed the nuclea.

7

Kształtowanie mikrostruktury i właściwości mechanicznych brązów cynowych

80%

Rzadkosz S. , Kozana J. , Garbacz-Klempka A. , Piękoś M. , Cieślak W.

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2014

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tom Vol. 14, iss. 4 spec.

107--110

PL

W artykule zaprezentowano wyniki badań nad wybraną grupą stopów z układu Cu-Sn. Przeanalizowano oddziaływanie udziału cyny w brązach cynowych w zakresie od 6 do 30 %. Kontynuując badania zmierzające do uzyskania odpornych na zużycie brązów spoza grup znormalizowanych stopów miedzi, oceniono oddziaływanie dodatku aluminium w stopach Cu-Sn. Przeprowadzono badania metalograficzne zmierzające do określenia mechanizmów oddziaływania zmiennych zawartości dodatków stopowych z uwagi na zmiany podstawowych właściwości mechanicznych. Uzyskane wyniki wskazują na wyraźne zmiany mikrostruktur badanych stopów, jak również wykazują silne utwardzenie stopów Cu-Sn. Zastosowane dodatki aluminium w zakresie do 3 % w wybranych stopach powodują również poprawę właściwości mechanicznych badanych brązów cynowych z dodatkiem aluminium.

EN

During the research a chosen group of copper - tin alloys were investigated. The influence Sn in tin bronzes was analysed in the broad spectrum between 6 to 30%. Continuing the research aiming at obtaining durable bronzes outside the normalised copper alloys, the influence of chosen aluminium additive in selected Cu-Sn alloys was assessed. Metallographic tests were carried out to determine the operating mechanisms and also the influence of the varied alloying additives from the perspective of changes in the basic properties of the alloys investigated. The obtained results clearly point to the changes in microstructures and mechanical properties of the alloys investigated.