Temat: heat-treatment - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effect Of The T6 Heat Treatment On Change Of Mechanical Properties Of The AlSi12CuNiMg Alloy Modified With Strontium
Wpływ obróbki cieplnej T6 na zmianę właściwości mechanicznych stopu AlSi12CuNiMg modyfikowanego strontem
Autorzy:: Pezda, J.
Powiązania:: https://bibliotekanauki.pl/articles/355605.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: aluminum alloys
heat treatment
mechanical properties
stopy aluminium
obróbka cieplna
właściwości mechaniczne
Opis:: The paper presents test results concerning an effect of the heat treatment on microstructure and mechanical properties of eutectic EN AC-AlSi12CuNiMg (EN AC-48000) alloy according to the EN 1706:2010 (tensile strength – R_m, hardness – HB 10/1000/30) modified with strontium. Solution heat treatment and ageing treatment temperature ranges were selected on base of heating (melting) curves recorded with use of the ATD method. Temperatures of the solution heat treatment were 500, 520, and 535°C ±5°C, while the solution time ranged from 0.5 to 3 h (0.5; 1.5 and 3 h). Temperature of the solution heat treatment amounted to 180, 235 and 310°C, while the ageing time ranged from 2 to 8 h (2, 5 and 8 h). Obtained results have enabled determination of optimal parameters of the T6 heat treatment in aspect of improvement of tensile strength R_m and hardness HB of the alloy, with reduced time of individual treatments and determination of mathematical relationships enabling prediction of these mechanical properties.
W pracy przedstawiono wyniki badań dotyczące wpływu obróbki cieplnej na właściwości mechaniczne (wytrzymałość na rozciąganie – R_m, twardość – HB 10/1000/30) i mikrostrukturę eutektycznego stopu EN AC-AlSi12CuNiMg (EN AC-48000) zgodnie z PN-EN 1706:2011 modyfikowanego strontem. Zakresy temperatur zabiegów przesycania i starzenia zostały dobrane w oparciu o krzywe nagrzewania (topienia) zarejestrowane metodą ATD. Temperatury przesycania wynosiły 500, 520 i 535°C ± 5°C, a czas przesycania mieścił się w zakresie od 0.5 do 3 godzin (0.5; 1.5 i 3 h). Temperatura starzenia wynosiła 180, 235 i 310°C. Czas przesycania mieścił się w zakresie od 2 do 8 godzin (2, 5 i 8 h). Uzyskane wyniki pozwoliły na określenie optymalnych parametrów obróbki cieplnej T6 w aspekcie poprawy wytrzymałości na rozciąganie R_m i twardości HB stopu, przy ograniczeniu czasu poszczególnych zabiegów oraz wyznaczenie zależności matematycznych umożliwiających predykcje tych właściwości mechanicznych.
Źródło:: Archives of Metallurgy and Materials; 2015, 60, 2A; 627-632
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: T6 Heat Treatment of Hypo-eutectic Silumins in Aspect of Improvement of Rm Tensile Strength
Autorzy:: Pezda, J.
Powiązania:: https://bibliotekanauki.pl/articles/379746.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: heat treatment
modification
ATD
tensile strength
obróbka cieplna
modyfikacja
wytrzymałość na rozciąganie
Opis:: Improvement of properties of silumins in scope of classic methods is connected with changes in morphology of silicon precipitation through: process of modification of alloy, maintaining a suitable temperature of overheating and pouring into moulds, as well as perfection of heat treatment processes. Obtained structure of casting have a direct influence on mechanical and technological properties of machinery parts, and therefore, usage of knowledge on crystallization to control of crystallization’s kinetics of castings in order to optimize obtained structure and introduction of modern methods of heat treatment, enabling considerable improvement of mechanical and technological properties, becomes an important factor. Dispersion hardening with soaking of alloy near temperature of solidus, consisting in heating of poured specimens to temperature of solutioning, keeping in such temperature, cooling down in cold water (20^oC), and next operation of artificial ageing have effect on change of tensile strength R_m of a selected hypo-eutectoid silumins. Selection of suitable parameters of dispersion hardening is condition of obtainment of positive results in terms of improvement of tensile strength Rm and has effect on its economic aspects.
Źródło:: Archives of Foundry Engineering; 2012, 12, 2s; 49-52
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effect of Shortened Heat Treatment on the Hardness and Microstructure of 320.0 Aluminium Alloy
Autorzy:: Pezda, J.
Powiązania:: https://bibliotekanauki.pl/articles/381513.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: aluminium alloys
ATD
heat treatment
HB hardness
stopy aluminium
obróbka cieplna
twardość
Opis:: Improvement of Al-Si alloys properties in scope of classic method is connected with change of Si precipitations morphology through: using modification of the alloy, maintaining suitable temperature of overheating and pouring process, as well as perfection of heat treatment methods. Growing requirements of the market make it necessary to search after such procedures, which would quickly deliver positive results with simultaneous consideration of economic aspects. Presented in the paper shortened heat treatment with soaking of the alloy at temperature near temperature of solidus could be assumed as the method in the above mentioned understanding of the problem. Such treatment consists in soaking of the alloy to temperature of solutioning, keeping in such temperature, and next, quick quenching in water (20°C) followed by artificial ageing. Temperature ranges of solutioning and ageing treatments implemented in the adopted testing plan were based on analysis of recorded curves from the ATD method. Obtained results relate to dependencies and spatial diagrams describing effect of parameters of the solutioning and ageing treatments on HB hardness of the investigated alloy and change of its microstructure. Performed shortened heat treatment results in precipitation hardening of the investigated 320.0 alloy, what according to expectations produces increased hardness of the material.
Źródło:: Archives of Foundry Engineering; 2014, 14, 2; 27-30
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Effect of Shortened Heat Treatment on Change of the R_m Tensile Strength of the 320.0 Aluminum Alloy
Autorzy:: Pezda, J.
Powiązania:: https://bibliotekanauki.pl/articles/381551.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: aluminum alloy
ATD
heat treatment
tensile strength
stop aluminium
metoda ATD
obróbka cieplna
wytrzymałość na rozciąganie
Opis:: Mechanical and technological properties of castings made from 3xx.x alloys depend mainly on properly performed process of melting and casting, structure of a casting and mould, as well as possible heat treatment. Precipitation processes occurring during the heat treatment of the silumins containing additives of Cu and/or Mg have effect on improvement of mechanical properties of the material, while choice of parameters of solutioning and ageing treatments belongs to objectives of research work performed by a number of authors. Shortened heat treatment, which is presented in the paper assures suitable mechanical properties (R_m), and simultaneously doesn’t cause any increase of production costs of a given component due to long lasting operations of the solutioning and ageing. Results of the research concern effects of the solutioning and ageing parameters on the R_m tensile strength presented in form of the second degree polynomial and illustrated in spatial diagrams. Performed shortened heat treatment results in considerable increase of the R_m tensile strength of the 320.0 alloy as early as after 1 hour of the solutioning and 2 hours of the ageing performed in suitable.
Źródło:: Archives of Foundry Engineering; 2015, 15, 1; 75-78
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Effect of Different Variants of Heat Treatment on Mechanical Properties of the AlSi17CuNiMg Alloy
Autorzy:: Jarko, A.
Pezda, J.
Powiązania:: https://bibliotekanauki.pl/articles/381243.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: heat treatment
homogenizing
aluminum alloys
mechanical properties
elongation
silumin
obróbka cieplna
homogenizacja
stopy aluminium
właściwości mechaniczne
Opis:: Dispersion hardening, as the main heat treatment of silumins having additions of copper and magnesium, results in considerable increase of tensile strength and hardness, with simultaneous decrease of ductility of the alloy. In the paper is presented an attempt of introduction of heat treatment operation consisting in homogenizing treatment prior operation of the dispersion hardening, to minimize negative effects of the T6 heat treatment on plastic properties of hypereutectoidal AlSi17CuNiMg alloy. Tests of the mechanical properties were performed on a test pieces poured in standardized metal moulds. Parameters of different variants of the heat treatment, i.e. temperature and time of soaking for individual operations were selected basing on the ATD (Thermal Derivation Analysis) diagram and analysis of literature. The homogenizing treatment significantly improves ductility of the alloy, resulting in a threefold increase of the elongation and more than fourfold increase of the impact strength in comparison with initial state of the alloy. Moreover, the hardness and the tensile strength (R_m) of the alloy decrease considerably. On the other hand, combination of the homogenizing and dispersion hardening enables increase of elongation with about 40%, and increase of the impact strength with about 25%, comparing with these values after the T6 treatment, maintaining high hardness and slight increase of the tensile strength, comparing with the alloy after the dispersion hardening.
Źródło:: Archives of Foundry Engineering; 2016, 16, 2; 41-44
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Heat Treatment of a Casting Element of a Through Clamp to Suspension of Electric Cables on Line Post Insulators
Autorzy:: Pezda, J.
Powiązania:: https://bibliotekanauki.pl/articles/379668.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: heat treatment
aluminum alloys
ATD
tensile strength
hardness HB
obróbka cieplna
stopy aluminium
wytrzymałość na rozciąganie
twardość
Opis:: Heat treatment of a casting elements poured from silumins belongs to technological processes aimed mainly at change of their mechanical properties in solid state, inducing predetermined structural changes, which are based on precipitation processes (structural strengthening of the material), being a derivative of temperature and duration of solutioning and ageing operations. The subject-matter of this paper is the issue concerning implementation of a heat treatment process, basing on selection of dispersion hardening parameters to assure improvement of technological quality in terms of mechanical properties of a clamping element of energy network suspension, poured from hypoeutectic silumin of the LM25 brand; performed on the basis of experimental research program with use of the ATD method, serving to determination of temperature range of solutioning and ageing treatments. The heat treatment performed in laboratory conditions on a component of energy network suspension has enabled increase of the tensile strength R_m and the hardness HB with about 60-70% comparing to the casting without the heat treatment, when the casting was solutioned at temperature 520 ^oC for 1 hour and aged at temperature 165 ^oC during 3 hours.
Źródło:: Archives of Foundry Engineering; 2016, 16, 3; 89-94
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Effect of T6 Heat Treatment Parameters on Technological Quality of the AlSi7Mg Alloy
Autorzy:: Pezda, J.
Jarco, A.
Powiązania:: https://bibliotekanauki.pl/articles/383288.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: heat treatment
aluminum alloy
tensile strength
elongation
impact strength
obróbka cieplna
stop aluminium
wytrzymałość na rozciąganie
wydłużenie
udarność
Opis:: Very well-known advantages of aluminum alloys, such as low mass, good mechanical properties, corrosion resistance, machining-ability, high recycling potential and low cost are considered as a driving force for their development, i.e. implementation in new applications as early as in stage of structural design, as well as in development of new technological solutions. Mechanical and technological properties of the castings made from the 3xx.x group of alloys depend mainly on correctly performed processes of melting and casting, design of a mould and cast element, and a possible heat treatment. The subject-matter of this paper is elaboration of a diagrams and dependencies between parameters of dispersion hardening (temperatures and times of solutioning and ageing treatments) and mechanical properties obtained after heat treatment of the 356.0 (EN AC AlSi7Mg) alloy, enabling full control of dispersion hardening process to programming and obtaining a certain technological quality of the alloy in terms of its mechanical properties after performed heat treatments. Obtained results of the investigations have enabled obtainment of a dependencies depicting effect of parameters of the solutioning and ageing treatments on the mechanical properties (R_m, A₅ and KC impact strength) of the investigated alloy. Spatial diagrams elaborated on the basis of these dependencies enable us to determine tendencies of changes of the mechanical properties of the 356.0 alloy in complete analyzed range of temperature and duration of the solutioning and ageing operations.
Źródło:: Archives of Foundry Engineering; 2016, 16, 4; 95-100
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Impact of Various Types of Heat Treatment on Mechanical Properties of the EN AC-AlSi6Cu4 Alloy
Autorzy:: Jarco, A.
Pezda, J.
Powiązania:: https://bibliotekanauki.pl/articles/382485.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: heat treatment
aluminum alloy
ATD method
elongation
tensile strength
obróbka cieplna
stop aluminium
metoda ATD
wydłużenie
wytrzymałość na rozciąganie
Opis:: The Al-Si-Cu alloys with content of the copper from 2 to 4 percent, after solutioning and artificial ageing treatments (T6 heat treatment), feature high strength and very high hardness, however their elongation is considerably reduced. Maintaining value of elongation on the level of initial alloy is possible due to homogenizing treatment performed prior the T6 treatment. Performed strength tests of the initial alloy and the alloy after individual types of the heat treatment enable comparison of obtained results and assessment of usability of the investigated alloy to production of a castings. Test pieces to the strength tests were poured in standardized metal moulds. Parameters of the heat treatment, temperature and duration of heating were established on base of the literature and the ATD diagram performed for the investigated alloy. Investigated EN AC-AlSi6Cu4 alloy after homogenizing treatment becomes plastic, its elongation A₅ and its impact strength KC increase nearly three times, with slight decrease of the tensile strength R_m. Dispersion hardening in connection with the homogenizing treatment results in increase of the tensile strength R_m with 68%, hardness and impact strength with 40% with elongation at level of the alloy without heat treatment. Making suitable selection of various types of the heat treatment it is possible, depending on needs, to control mechanical properties of the alloy.
Źródło:: Archives of Foundry Engineering; 2015, 15, 2 spec.; 35-38
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Effect of T6 heat treatment on mechanical properties and microstructure of EN AB-42000 alloy modified with strontium
Autorzy:: Pezda, J.
Powiązania:: https://bibliotekanauki.pl/articles/381247.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: alloy modification
heat treatment
thermal derivative analysis
mechanical properties
modyfikacja stopu
obróbka termiczna
analiza termiczna
analiza derywacyjna
właściwości mechaniczne
Opis:: Process of silumin properties perfection in scope of classic (simple and cheap) methods is connected with change of morphology of silumin precipitations through: process of alloy modification, maintaining suitable temperature of superheating treatment and pouring into moulds, as well as perfection of heat treatment operations. In the paper are presented results of a tests aimed at investigation of an effects of performed heat treatment operations on change of tensile strength of EN AC-42000 silumin modified with strontium. Investigated alloy was melted in electric resistance furnace. Course of crystallization process was recorded with use of thermal-derivative analysis (ATD), and on base of this analysis one determined temperatures range of heat treatment operations of the alloy. Performed heat treatment operation resulted in change of mechanical properties (R_m, A₅) of the investigated alloy, whereas performed tests enabled determination of temperature and duration of solutioning and ageing treatments, which condition improvement of its mechanical properties.
Źródło:: Archives of Foundry Engineering; 2011, 11, 2 spec.; 169-174
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Heat treatment of AlZn10Si7MgCu alloy and its effect on change of mechanical properties
Autorzy:: Pezda, J.
Powiązania:: https://bibliotekanauki.pl/articles/382847.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: obróbka cieplna
stop aluminium
metoda ATD
starzenie naturalne
właściwości mechaniczne
heat treatment
aluminum alloy
ATD method
natural ageing
mechanical properties
Opis:: The most important parameters which predetermine mechanical properties of a material in aspects of suitability for castings to machinery components are: tensile strength (Rm), elongation (A5, hardness (HB) and impact strength (KCV). Heat treatment of aluminum alloys is performed to increase mechanical properties of the alloys mainly. The paper comprises a testing work concerning effect of heat treatment process consisting of solution heat treatment and natural ageing on mechanical properties and structure of AlZn10Si7MgCu alloy moulded in metal moulds. Investigated alloy was melted in an electric resistance furnace. Run of crystallization was presented with use of thermal-derivative method (ATD). This method was also implemented to determination of heat treatment temperature ranges of the alloy. Performed investigations have enabled determination of heat treatment parameters' range, which conditions suitable mechanical properties of the investigated alloy. Further investigations will be connected with determination of optimal parameters of T6 heat treatment of the investigated alloy and their effect on change of structure and mechanical/technological properties of the investigated alloy.
Źródło:: Archives of Foundry Engineering; 2012, 12, 2; 135-138
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Effect of Heat Treatment on Machining Properties of the AlSi9Cu3(Fe) Alloy
Autorzy:: Wieroński, W.
Pezda, J.
Ponikwia, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/379474.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: silumin
heat treatment
machinability
refining
mechanical properties
cutting power
aluminum alloys
obróbka cieplna
obróbka mechaniczna
rafinacja
właściwości mechaniczne
cięcie
stopy aluminium
Opis:: Automation of machining operations, being result of mass volume production of components, imposes more restrictive requirements concerning mechanical properties of starting materials, inclusive of machinability mainly. In stage of preparation of material, the machinability is influenced by such factors as chemical composition, structure, mechanical properties, plastic working and heat treatment, as well as a factors present during machining operations, as machining type, cutting parameters, material and geometry of cutting tools, stiffness of the system: workpiece – machine tool – fixture and cutting tool. In the paper are presented investigations concerning machinability of the EN AC-AlSi9Cu3(Fe) silumin put to refining, modification and heat treatment. As the parameter to describe starting condition of the alloy was used its tensile strength Rm. Measurement of the machining properties of the investigated alloy was performed using a reboring method with measurement of cutting force, cutting torque and cutting power. It has been determined an effect of the starting condition of the alloy on its machining properties in terms of the cutting power, being indication of machinability of the investigated alloy. The best machining properties (minimal cutting power - Pc=48,3W) were obtained for the refined alloy, without heat treatment, for which the tensile strength Rm=250 MPa. The worst machinability (maximal cutting power Pc=89,0W) was obtained for the alloy after refining, solutioning at temperature 510 ^oC for 1,5 hour and aged for 5 hours at temperature 175 ^oC. A further investigations should be connected with selection of optimal parameters of solutioning and ageing treatments, and with their effect on the starting condition of the alloy in terms of improvement of both mechanical properties of the alloy and its machining properties, taking into consideration obtained surface roughness.
Źródło:: Archives of Foundry Engineering; 2016, 16, 3; 137-140
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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