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Your search for solidification resulted in 27 matches...

THE STUDY OF THE KINETICS OF SOLIDIFICATION AND COOLING OF PATTERN MATERIAL IN A DIE


The article presents the developed research methodology that allows the evaluation of the kinetics of solidification and cooling of pattern material in a metal mould ( die). The apparatus was described and the resu...

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MANUFACTURING PROCESS AND MECHANICAL PROPERTIES OF ORDERED, CELLULAR CONSTRUCTIONS CAST FROM Al-Si ALLOY


Ordered cellular constructions are an important structural element used in armaments, aerospace and automotive industry. The use of Rapid Prototyping technique and control of solidification process allow making cas...

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NITROGEN AND BORON EFFECT ON STRUCTURAL TRANSFORMATIONS TAKING PLACE IN DUCTILE IRON DURING AUSTEMPERING TREATMENT


The role of interstitial elements, i.e. nitrogen and boron, in the process of ductile iron solidification and heat treatment of castings was discussed. Austempering of ductile iron aims at obtaining an ausferritic ...

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COMPARATIVE STUDIES OF THE EFFECT OF VARIOUS ADDITIVES ON STRUCTURE AND MECHANICAL PROPERTIES OF CuAl10Fe3Mn2 ALLOY


Comparative studies were made on modification of aluminium CuAl10Fe3Mn2 bronze by application of modifiers affecting changes in surface properties (Na, K, Ca, Mg) and providing additional substrates for crystallisa...

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ANALYSIS OF THE POURING AND SOLIDIFICATION PROCESS OF ALLOYED STEEL CASTINGS FOR LOW - TEMPERATURE PERFORMANCE


The study forms a part of the program of applied industrial research executed under Target Project No. ROW-II-403/2008 at MAGNUS-NORD Sp z o.o in Toruń. Pouring and solidification of two large steel castings weigh...

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STRESS MODELS AND THEIR APPLICATION IN EXPLANATION OF CASTING DEFECT INFLUENCE ON THE CAST PART MECHANICAL BEHAVIOUR


The article examines possible use of analytical and numerical models of casting defects of a void type in determination of local increase of stresses in the vicinity of casting defect. The stress level can be one o...

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EVALUATING THE FEASIBILITY OF MAKING ALUMINIUM ALLOY NANOMODIFIERS BY THE METHOD OF MECHANICAL ALLOYING


Nanomaterials extend the range of their application in human activities. The past few years have faced a considerable increase of interest in various aspects of the application of nanotechnology in liquid phase met...

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MICROADDITIONS OF BORON AND VANADIUM IN ADI. PART 2. OWN INVESTIGATIONS


In the second part of the study, describing the role of vanadium and boron microadditions in the process of structure formation in heavy-walled castings made from ADI, the results of own investigations were present...

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SIMULATION STUDIES (USING METHODS OF NUMERICAL CALCULATIONS) OF POURING AND SOLIDIFICATION OF SELECTED IRON ALLOY CASTINGS


The results of computer simulation carried out on MAGMAsoft and MAGMAiron programmes were presented for the technology of pouring and solidification of 35GSM steel castings and GJS400-15 and GJS600-3 ductile iron casti...

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A NOVEL METHOD FOR THE OXYGEN ACTIVITY MEASUREMENT APPLIED IN CONTROL OF THE DUCTILE IRON MANUFACTURING PROCESS


The objective of the present study was to evaluate a method for the measurement of oxygen activity in liquid cast iron to predict the cast iron properties after solidification. A series of experimental melts were made, testing the activity of oxyg...

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USE OF FLOW-3D PROGRAM FOR SIMULATION OF POURING AND SOLIDIFICATION PROCESS OF DUCTILE CAST IRON CASTINGS. PART 1


Pouring and solidification of EN-GJS-400-15 ductile cast iron castings of soft wedge gate valves for PE pipes used in gas pipelines was simulated. The analysis was performed in Flow-3D program. On the basis of the two-dimension documentation provi...

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THE ASSESSMENT OF CHANGES OF THE STRUCTURE OF DUCTILE CAST IRON DEPENDING ON THE TIME AND TEMPERATURE OF THE METALLURGIC PROCESS


The results of technological tests (chemical composition, solidification curves, microstructure) of ductile cast iron smelting in the Foundry Research Institute in an induction furnace. In the case of crystallization of spheroidal graphite no long...

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APPLICATION OF THE FLOW 3-D SOFTWARE FOR SIMULATION OF THE SPHEROIDAL IRON CASTING AND SOLIDIFICATION. PART 2


A simulation analysis was carried out on the casting and solidification of EN-GJS-400-15 spheroidal iron for production of soft-sealed wedge gates for PE pipe gas networks. The analysis was made in the Flow-3D software. Based on the engineering do...

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SIMULATION TESTS TO FORECAST SELECTED PROPERTIES OF THIN-WALLED CASTS OF DUCTILE IRON DOMES


Thin-walled dome casts (hemispheres) with a wall thickness of 4.2 and 10.3 mm made of ductile iron underwent simulation tests within the frame of forecasting the tendency to create residual stresses, casting defects, the shaping of structures and ...

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The use of low-volume cup samplers for test solidification of cast iron


The aim of this paper was to assess the possibilities and benefits of using low-volume (thinned) samplers for thermal analysis of cast iron. As part of the research, a series of melts of plain cast iron and low-alloy cast iron with different struc...

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Development of innovative method to procedure chemically active nano-coatings for moulds and cores


Tests were conducted to develop a new generation of functional nano-coatings used in the foundry industry. The research focused on the introduction of modern and innovative coatings based on nanoparticles of cast elements and active chemical compo...

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Application of topological optimisation in forming of cast cellular structures


Cellular structures are critical components which perform as energy absorbers in the defense, aerospace and automotive industries. Simultaneous application of topological optimisation algorithms for strength forming, solidification simulation soft...

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Effect of tungsten on the solidification process, microstructure and properties of silumin 226


The effect of tungsten on the solidification process, microstructure and mechanical properties of silumin 226 under the conditions close to equilibrium during pressure die casting was discussed. An increase in both mechanical and plastic propertie...

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Solidification path of the AlFeMnSi alloys in a stage of primary intermetallic phases precipitation


In this work, an analysis of the solidification course of the AlFeMnSi alloys was carried out in the Al alloys of Fe, Mn, and Si concentrations in a range supplementary for those examined until now. The morphology of the pre-dendrite and pre-eutec...

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Production of castings with non-dendritic structure using the Rapid Slurry Forming method


The article describes several variations of the semi-solid metal processing (SSM) technique rendering castings with non-dendritic structure and significantly improved mechanical properties. The metal slurry was produced using the Rapid Slurry Form...

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Comparative analysis of solidification curves obtained by thermal analysis system and multi-channel digital recorder


The aim of the study was to determine the possibilities and conditions for the use of a multi-channel digital recorder to control cast iron quality by rapid thermal analysis. A computer program cooperating with a digital recorder was developed. It...

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Simulation of the volume and distribution of air entrapped by liquid metal in a test mould for the pressure die casting process


Computer programs are now a common tool aiding the engineer’s work on structure design. The design of foundry moulds used in the pressure die casting process, based on the casting design and effectively utilising the ability to create 3D ima...

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The AlFeMnSi intermetallics competition in the interdendritic eutectics in AlSi cast alloys influenced by cooling rate and transition metals content


Microscopic observations and quantitative analysis of the microstructure image were used to analyze the solidification course and morphology evolution in polyphase eutectics in the AlSi casting alloys with transition metals Fe and Mn. The utility ...

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Studies of protective coatings used for metal moulds


The die casting method is based on casting into permanent metal moulds, which makes it possible to obtain a large amount of casts with practically identical shapes. Compared to the technology of sand mould casting, this method has many advantages....

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Development of a technology for the production of ceramic moulds with reduced thermal conductivity to control the solidification of thin-walled castings


During the project a technology of making ceramic moulds using aluminosilicate microspheres was developed. According to the developed technology, ceramic samples were used to determine thermal conductivity in the temperature range of 500°C to ...

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The evaluation of microporosity and mechanical properties in high strength aluminum alloys with the use of numerical analysis and computed tomography


One of the aspects of sustainable development is the reduction of the concentration of CO2 in the atmosphere. This could be achieved for example by the reduction of fuel consumption. That is why the research for the new construction and...

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High-temperature interaction of molten vermicular graphite cast iron with Al2O3 substrate


The wetting behavior and reactivity between molten cast iron (originally vermicular graphite cast iron, containing in wt. %: 3.70 C, 2.30 Si, 0.44 Mn, 0.054 P, 0.017 Mg, 0.015 S) and commercial polycrystalline alumina (Al2O3 ...

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