Pub Date : 2014-11-18DOI: 10.7494/MAFE.2014.40.2.93
W. Ściężor, A. Mamala, P. Kwaśniewski
Modern aluminium alloys are more commonly used in various industries. Often the products of such materials operate at elevated temperatures. In addition to standard requirements in terms of mechanical and technological properties, one of the key performance properties becomes the increased resistance to annealing. This paper examines the heat treatment effect on the mechanical properties of sheets made of aluminium with grain refiner additions (Ti + B), Fe, Si and Mn. Tested materials were obtained by cold-rolling strips, manufactured by twin-roll casting – TRC method. TRC method is increasingly being used in the manufacture of flat-rolled products. This technology eliminates the hot rolling operations and the strip obtained by TRC method can be subjected to direct cold rolling.
{"title":"An examination of the heat treatment effect on mechanical properties of twin-roll cast followed by cold rolling sheets made of aluminium and its alloys","authors":"W. Ściężor, A. Mamala, P. Kwaśniewski","doi":"10.7494/MAFE.2014.40.2.93","DOIUrl":"https://doi.org/10.7494/MAFE.2014.40.2.93","url":null,"abstract":"Modern aluminium alloys are more commonly used in various industries. Often the products of such materials operate at elevated temperatures. In addition to standard requirements in terms of mechanical and technological properties, one of the key performance properties becomes the increased resistance to annealing. This paper examines the heat treatment effect on the mechanical properties of sheets made of aluminium with grain refiner additions (Ti + B), Fe, Si and Mn. Tested materials were obtained by cold-rolling strips, manufactured by twin-roll casting – TRC method. TRC method is increasingly being used in the manufacture of flat-rolled products. This technology eliminates the hot rolling operations and the strip obtained by TRC method can be subjected to direct cold rolling.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"33 1","pages":"93"},"PeriodicalIF":0.0,"publicationDate":"2014-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76206071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-14DOI: 10.7494/MAFE.2014.40.1.15
E. Rudnik, P. Biskup
Electrochemistry of tellurium stationary electrode was studied in acidic nitrate solutions with pH 1.5 – 3.0. Cyclic voltammetry indicated that two products were formed at potentials above 300 mV (SCE): soluble HTeO 2 + (500 mV) and sparingly soluble H 2 TeO 3 (650 mV), but the former seemed to be an intermediate product for TeO 2 precipitation on the electrode surface. Formation of the solid products as porous layers was almost undisturbed and no electrode passivation was observed. H 2 TeO 3 and TeO 2 dissolved to HTeO 2 + under acidic electrolyte, but this process was hindered by pH increase. Cathodic polarization of tellurium electrode below -800 mV was accompanied by evolution of H 2 Te, which was then oxidized at the potentials approx. -700 mV. H 2 Te generated in the electrochemical reaction decomposed to elemental tellurium as black powdery precipitates in the bulk of the solution and a bright film drifting on the electrolyte surface.
{"title":"ELECTROCHEMICAL BEHAVIOR OF TELLURIUM IN ACIDIC NITRATE SOLUTIONS","authors":"E. Rudnik, P. Biskup","doi":"10.7494/MAFE.2014.40.1.15","DOIUrl":"https://doi.org/10.7494/MAFE.2014.40.1.15","url":null,"abstract":"Electrochemistry of tellurium stationary electrode was studied in acidic nitrate solutions with pH 1.5 – 3.0. Cyclic voltammetry indicated that two products were formed at potentials above 300 mV (SCE): soluble HTeO 2 + (500 mV) and sparingly soluble H 2 TeO 3 (650 mV), but the former seemed to be an intermediate product for TeO 2 precipitation on the electrode surface. Formation of the solid products as porous layers was almost undisturbed and no electrode passivation was observed. H 2 TeO 3 and TeO 2 dissolved to HTeO 2 + under acidic electrolyte, but this process was hindered by pH increase. Cathodic polarization of tellurium electrode below -800 mV was accompanied by evolution of H 2 Te, which was then oxidized at the potentials approx. -700 mV. H 2 Te generated in the electrochemical reaction decomposed to elemental tellurium as black powdery precipitates in the bulk of the solution and a bright film drifting on the electrolyte surface.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"12 1","pages":"15-31"},"PeriodicalIF":0.0,"publicationDate":"2014-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85896798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-14DOI: 10.7494/MAFE.2014.40.1.7
K. Kaczmarska, B. Grabowska
In this study, the results of biodegradability of new polymeric binder consist of modified starch - Polvitex Z (by Xenon) in water solution are presented. Biodegradation tests were conducted in accordance with Zahn-Wellens method, which is intended to denote the susceptibility to biodegradation by microorganisms (in high concentrations during the static test) of the non-volatile, watersoluble organic compounds. Observations of the decomposition process was carried out through regular, daily or at certain time intervals by measurement the Chemical Oxygen Demand (COD) and level of biodegradability (R T ) in the prepared samples during the test. The study showed that the starch binder is fully biodegradable material in an aqueous medium.
{"title":"BIODEGRADATION OF A NEW POLYMER BINDER BASED ON MODIFIED STARCH IN A WATER ENVIRONMENT","authors":"K. Kaczmarska, B. Grabowska","doi":"10.7494/MAFE.2014.40.1.7","DOIUrl":"https://doi.org/10.7494/MAFE.2014.40.1.7","url":null,"abstract":"In this study, the results of biodegradability of new polymeric binder consist of modified starch - Polvitex Z (by Xenon) in water solution are presented. Biodegradation tests were conducted in accordance with Zahn-Wellens method, which is intended to denote the susceptibility to biodegradation by microorganisms (in high concentrations during the static test) of the non-volatile, watersoluble organic compounds. Observations of the decomposition process was carried out through regular, daily or at certain time intervals by measurement the Chemical Oxygen Demand (COD) and level of biodegradability (R T ) in the prepared samples during the test. The study showed that the starch binder is fully biodegradable material in an aqueous medium.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"16 1","pages":"7"},"PeriodicalIF":0.0,"publicationDate":"2014-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85995314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-14DOI: 10.7494/MAFE.2014.40.1.45
K. Ziewiec, K. Prusik, M. Różycka
The aim of the work is to study the ability and potential of glass formation in Ni-Fe-Cu-P alloys. A series of alloys were produced in arc furnace (i.e. Ni 70 Fe 5 Cu 5 P 20 , Ni 60 Fe 10 Cu 10 P 20 , Ni 50 Fe 15 Cu 15 P 20 , Ni 40 Fe 20 Cu 20 P 20 , Ni 30 Fe 25 Cu 25 P 20 , Ni 20 Fe 30 Cu 30 P 20 ). The primary microstructure of the ingots was studied. The ribbons in as-melt-spun state were characterized by X-ray diffraction (XRD). The Ni 70 Fe 5 Cu 5 P 20 , Ni 60 Fe 10 Cu 10 P 20 melt-spun alloys were found to be amorphous. For higher copper and iron concentrations crystalline structure was obtained after melt spinning. This correlated with the tendency for the formation of the Fe-based phases enriched in P and Cu-based poorly alloyed phases which resulted in formation of crystalline microstructure in melt-spun ribbons. For higher concentration of Fe and Cu, microstructures of the alloys contained constituents resultant from tendency for separation in the liquid state. It is observed that formation of the crystalline melt-spun ribbons is caused by attraction of phosphorus by iron and formation of copper-based fcc phase.
本工作的目的是研究Ni-Fe-Cu-P合金玻璃化的能力和潜力。在电弧炉中制备了Ni 70 Fe 5 Cu 5 p20、Ni 60 Fe 10 Cu 10 p20、Ni 50 Fe 15 Cu 15 p20、Ni 40 Fe 20 Cu 20 p20、Ni 30 Fe 25 Cu 25 p20、Ni 20 Fe 30 Cu 30 p20等系列合金。对铸锭的初次组织进行了研究。用x射线衍射(XRD)对熔融纺丝状态下的条带进行了表征。Ni 70 Fe 5 Cu 5 p20、Ni 60 Fe 10 Cu 10 p20熔纺合金均为非晶态。当铜和铁浓度较高时，熔体纺丝后得到结晶结构。这与熔纺带中富P的fe基相和cu基低合金化相的形成趋势有关，导致了结晶组织的形成。当Fe和Cu浓度较高时，合金的显微组织中含有液相分离倾向的成分。观察到结晶熔融纺带的形成是由铁对磷的吸引和铜基fcc相的形成引起的。
{"title":"AMORHIZATION AND LIQUID STATE SEPARATION IN Ni80-2xCuxFexP20 ALLOYS","authors":"K. Ziewiec, K. Prusik, M. Różycka","doi":"10.7494/MAFE.2014.40.1.45","DOIUrl":"https://doi.org/10.7494/MAFE.2014.40.1.45","url":null,"abstract":"The aim of the work is to study the ability and potential of glass formation in Ni-Fe-Cu-P alloys. A series of alloys were produced in arc furnace (i.e. Ni 70 Fe 5 Cu 5 P 20 , Ni 60 Fe 10 Cu 10 P 20 , Ni 50 Fe 15 Cu 15 P 20 , Ni 40 Fe 20 Cu 20 P 20 , Ni 30 Fe 25 Cu 25 P 20 , Ni 20 Fe 30 Cu 30 P 20 ). The primary microstructure of the ingots was studied. The ribbons in as-melt-spun state were characterized by X-ray diffraction (XRD). The Ni 70 Fe 5 Cu 5 P 20 , Ni 60 Fe 10 Cu 10 P 20 melt-spun alloys were found to be amorphous. For higher copper and iron concentrations crystalline structure was obtained after melt spinning. This correlated with the tendency for the formation of the Fe-based phases enriched in P and Cu-based poorly alloyed phases which resulted in formation of crystalline microstructure in melt-spun ribbons. For higher concentration of Fe and Cu, microstructures of the alloys contained constituents resultant from tendency for separation in the liquid state. It is observed that formation of the crystalline melt-spun ribbons is caused by attraction of phosphorus by iron and formation of copper-based fcc phase.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"37 1","pages":"45-54"},"PeriodicalIF":0.0,"publicationDate":"2014-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82122357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-14DOI: 10.7494/MAFE.2014.40.1.33
I. Sulima, P. Hyjek, T. Tokarski
Samples made of AISI 316L stainless steel reinforced with 8 vol.% TiB 2 particles were prepared using high pressure-high temperature (HP-HT) method. Next, the composites were annealed at temperature of 1200°C for different holding times. The influence of annealing temperature and time on the properties and microstructure of AISI316L+8% vol.TiB 2 composites was investigated. The structural studies showed formation of phases containing chromium, molybdenum and boron.
{"title":"INFLUENCE OF ANNEALING CONDITIONS ON THE PROPERTIES AND MICROSTRUCTURE OF STEEL COMPOSITES","authors":"I. Sulima, P. Hyjek, T. Tokarski","doi":"10.7494/MAFE.2014.40.1.33","DOIUrl":"https://doi.org/10.7494/MAFE.2014.40.1.33","url":null,"abstract":"Samples made of AISI 316L stainless steel reinforced with 8 vol.% TiB 2 particles were prepared using high pressure-high temperature (HP-HT) method. Next, the composites were annealed at temperature of 1200°C for different holding times. The influence of annealing temperature and time on the properties and microstructure of AISI316L+8% vol.TiB 2 composites was investigated. The structural studies showed formation of phases containing chromium, molybdenum and boron.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"7 1","pages":"33-43"},"PeriodicalIF":0.0,"publicationDate":"2014-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79077433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.7494/MAFE.2014.40.4.211
D. Fydrych, A. Świerczyńska, M. Landowski
In the paper preliminary experimental studies of flux cored wires moisturized under controlled conditions are described. Three seamless wires of different grades have been placed in environmental chamber and moisturized in extremely adverse conditions (temperature T = 60° C, relative humidity H = 90%) for 240 hours. During this time measurements of weight gain and observations of surface of wires have been carried out. Also diffusible hydrogen amount in deposited metal has been determined by mercury method for one of moisturized wire. Significant increase of hydrogen level was observed (from H5 to H10 level). Further research will be aimed on determination of the effect of storage conditions on hydrogenation of deposited metal and quality of flux cored wires.
{"title":"PRELIMINARY STUDIES OF SEAMLESS FLUX CORED WIRES STORED IN EXTREME CONDITIONS","authors":"D. Fydrych, A. Świerczyńska, M. Landowski","doi":"10.7494/MAFE.2014.40.4.211","DOIUrl":"https://doi.org/10.7494/MAFE.2014.40.4.211","url":null,"abstract":"In the paper preliminary experimental studies of flux cored wires moisturized under controlled conditions are described. Three seamless wires of different grades have been placed in environmental chamber and moisturized in extremely adverse conditions (temperature T = 60° C, relative humidity H = 90%) for 240 hours. During this time measurements of weight gain and observations of surface of wires have been carried out. Also diffusible hydrogen amount in deposited metal has been determined by mercury method for one of moisturized wire. Significant increase of hydrogen level was observed (from H5 to H10 level). Further research will be aimed on determination of the effect of storage conditions on hydrogenation of deposited metal and quality of flux cored wires.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"10 17 1","pages":"211"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88822549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.7494/MAFE.2014.40.3.141
D. Kapinos, B. Augustyn, M. Szymanek
In recent years, magnesium alloys have gained widespread popularity as construction materials. This is due to their low density, high strength properties, and advances in their production technology. Properties of magnesium alloys depend primarily on the type, quantity, and quality of elements present in their composition. It is therefore necessary to carry out research on the further optimisation of the production technology of these alloys. This article presents the results of studies carried out in order to determine the type, form, and parameters of the process of introducing selected alloying elements to magnesium in a manner which enables the manufacture of alloys with predetermined chemical composition. As part of the work, elements such as Al, Zn, Mn, Zr, Si, Cu, Ca, as well as rare earth elements (RE) were introduced into the liquid magnesium. The alloying elements were introduced into the melt at different temperatures in either a metallic form or as master alloys. While conducting studies, respective solubility graphs were plotted for the alloying elements showing the time taken for each element to dissolve to the required form at a specific temperature and concentration. The studies resulted in the development of several techniques of introducing selected alloying elements, which enabled the manufacture of various types of alloys.
{"title":"METHODS OF INTRODUCING ALLOYING ELEMENTS INTO LIQUID MAGNESIUM","authors":"D. Kapinos, B. Augustyn, M. Szymanek","doi":"10.7494/MAFE.2014.40.3.141","DOIUrl":"https://doi.org/10.7494/MAFE.2014.40.3.141","url":null,"abstract":"In recent years, magnesium alloys have gained widespread popularity as construction materials. This is due to their low density, high strength properties, and advances in their production technology. Properties of magnesium alloys depend primarily on the type, quantity, and quality of elements present in their composition. It is therefore necessary to carry out research on the further optimisation of the production technology of these alloys. This article presents the results of studies carried out in order to determine the type, form, and parameters of the process of introducing selected alloying elements to magnesium in a manner which enables the manufacture of alloys with predetermined chemical composition. As part of the work, elements such as Al, Zn, Mn, Zr, Si, Cu, Ca, as well as rare earth elements (RE) were introduced into the liquid magnesium. The alloying elements were introduced into the melt at different temperatures in either a metallic form or as master alloys. While conducting studies, respective solubility graphs were plotted for the alloying elements showing the time taken for each element to dissolve to the required form at a specific temperature and concentration. The studies resulted in the development of several techniques of introducing selected alloying elements, which enabled the manufacture of various types of alloys.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"19 1","pages":"141"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89080499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.7494/MAFE.2014.40.4.231
L. Tuz, K. Pańcikiewicz, Z. Żurek
An evaluation of the macro- and microstructure of magnesium alloy tungsten arc-welded butt joints is presented in this paper. Al-Zn-Mn magnesium alloys are taken into consideration in the research. Their main alloying elements are zinc and aluminum, respectively. The dendritic microstructure of the base metal is obtained. The analysis shows that achieving good-quality butt joints of magnesium alloys is possible.
{"title":"MICROSTRUCTURE OF TIG WELDED WITH SELECTED MAGNESIUM ALLOYS","authors":"L. Tuz, K. Pańcikiewicz, Z. Żurek","doi":"10.7494/MAFE.2014.40.4.231","DOIUrl":"https://doi.org/10.7494/MAFE.2014.40.4.231","url":null,"abstract":"An evaluation of the macro- and microstructure of magnesium alloy tungsten arc-welded butt joints is presented in this paper. Al-Zn-Mn magnesium alloys are taken into consideration in the research. Their main alloying elements are zinc and aluminum, respectively. The dendritic microstructure of the base metal is obtained. The analysis shows that achieving good-quality butt joints of magnesium alloys is possible.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"152 5 1","pages":"231"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91523584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.7494/MAFE.2014.40.3.191
J. Zych, M. Wójcik, J. Kolczyk, T. Snopkiewicz
The paper presents results of the studies regarding influence of metallostatic pressure of AlSi7Mg alloy on surface roughness of castings prepared in sand moulds as well as on alloy’s density. Castings in a cylindrical shape with a diameter of 15.0; 25.0 or 3.5 mm and height of 700 mm that were cast in a vertical orientation are investigated. The melted alloy was poured into moulds in two ways: bottom up, and top down. Higher pressure and larger diameter of castings favors increase of surface roughness. In the analyzed range of height of a metal column, density increases linearly: for instance, in case of castings with diameter of o25 mm, the density increases from ρ = 2.60 g/cm3 to ρ = 2.68 g/cm3, what is about 0.10 g/cm3. In the roller with larger diameter, the density is slightly smaller, however the range of changes along the longer axis is similar to that in the cylinder with diameter of o25 mm. Additional, ultrasonic studies were performed, which prove that with small changes of the alloy density, velocity of a longitudinal wave changes only slightly. Thus, it is difficult to control small variations (Δρ < 0,10 g/cm3) in density of AlSi7Mg alloy with ultrasonic technique.
{"title":"Metallostatic pressure function in the quality of Al-Si alloy castings made in sand moulds","authors":"J. Zych, M. Wójcik, J. Kolczyk, T. Snopkiewicz","doi":"10.7494/MAFE.2014.40.3.191","DOIUrl":"https://doi.org/10.7494/MAFE.2014.40.3.191","url":null,"abstract":"The paper presents results of the studies regarding influence of metallostatic pressure of AlSi7Mg alloy on surface roughness of castings prepared in sand moulds as well as on alloy’s density. Castings in a cylindrical shape with a diameter of 15.0; 25.0 or 3.5 mm and height of 700 mm that were cast in a vertical orientation are investigated. The melted alloy was poured into moulds in two ways: bottom up, and top down. Higher pressure and larger diameter of castings favors increase of surface roughness. In the analyzed range of height of a metal column, density increases linearly: for instance, in case of castings with diameter of o25 mm, the density increases from ρ = 2.60 g/cm3 to ρ = 2.68 g/cm3, what is about 0.10 g/cm3. In the roller with larger diameter, the density is slightly smaller, however the range of changes along the longer axis is similar to that in the cylinder with diameter of o25 mm. Additional, ultrasonic studies were performed, which prove that with small changes of the alloy density, velocity of a longitudinal wave changes only slightly. Thus, it is difficult to control small variations (Δρ < 0,10 g/cm3) in density of AlSi7Mg alloy with ultrasonic technique.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"457 1","pages":"191"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77401907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.7494/MAFE.2014.40.3.161
J. Mocek, J. Zych, Łukasz Krubnik
A review of various technologies using expendable casting patterns made of expanded polystyrene is given in the paper. The results of our own investigations on implementing this technology at the pilot-plant scale – for the art castings series – were presented. The results of tests of materials and moulds applied in the full-mould technology were shown. Gas evolution tendencies of expanded polystyrenes and protective coatings were estimated. Gas evolutions were described as functions of the polystyrene heating temperature. The tests of protective coatings used in this technology were performed and strength (Rm), permeability (P), and gas evolution tendency of these coatings assessed. New solutions developed by the team of researchers were applied in testing coating strength, permeability, and the gas evolution tendency of expanded polystyrene. A good correlation between the results of coating properties and the obtained casting quality was found. Coatings, which were characterised by higher strengths and better permeability, allowed us to produce castings without surface or inner faults.
{"title":"CASTING OF Al-Si ALLOYS IN THE FULL-MOULD TECHNOLOGY. PROCESS CONDITIONS","authors":"J. Mocek, J. Zych, Łukasz Krubnik","doi":"10.7494/MAFE.2014.40.3.161","DOIUrl":"https://doi.org/10.7494/MAFE.2014.40.3.161","url":null,"abstract":"A review of various technologies using expendable casting patterns made of expanded polystyrene is given in the paper. The results of our own investigations on implementing this technology at the pilot-plant scale – for the art castings series – were presented. The results of tests of materials and moulds applied in the full-mould technology were shown. Gas evolution tendencies of expanded polystyrenes and protective coatings were estimated. Gas evolutions were described as functions of the polystyrene heating temperature. The tests of protective coatings used in this technology were performed and strength (Rm), permeability (P), and gas evolution tendency of these coatings assessed. New solutions developed by the team of researchers were applied in testing coating strength, permeability, and the gas evolution tendency of expanded polystyrene. A good correlation between the results of coating properties and the obtained casting quality was found. Coatings, which were characterised by higher strengths and better permeability, allowed us to produce castings without surface or inner faults.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"38 1","pages":"161"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77785406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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