scholarly journals Development of an Indigenously Made Diesel Fired Crucible Furnace

2019 ◽  
Author(s):  
Tolulope Olukokun ◽  
Adefemi Adekunle ◽  
Ismaila Alabi ◽  
Mudasiru Aderonmu ◽  
Mutiu Kareem
Keyword(s):  
Crucible Furnace

Numerical simulation of electromagnetic levitation in a cold crucible furnace

2015 ◽  
Vol 51 (3) ◽  
pp. 567-578 ◽  
Author(s):  
S. Spitans ◽  
E. Baake ◽  
A. Jakovičs ◽  
H. Franz
Keyword(s):  
Numerical Simulation ◽  
Electromagnetic Levitation ◽  
Cold Crucible ◽  
Crucible Furnace

Numerical modelling of free surface dynamics of conductive melt in induction crucible furnace

2010 ◽  
Vol 46 (4) ◽  
pp. 425-436 ◽  
Author(s):  
S. Spitans ◽  
A. Jakovičs ◽  
E. Baake ◽  
B. Nacke
Keyword(s):  
Free Surface ◽  
Numerical Modelling ◽  
Surface Dynamics ◽  
Crucible Furnace ◽  
Free Surface Dynamics

scholarly journals Microstructure and Properties of TiAl-Based Alloys Melted in Graphite Crucible

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 669
Author(s):  
Wojciech Szkliniarz ◽  
Agnieszka Szkliniarz
Keyword(s):  
Coefficient Of Thermal Expansion ◽  
Graphite Crucible ◽  
Strength Properties ◽  
Operating Conditions ◽  
Vacuum Induction Furnace ◽  
Intermetallic Alloys ◽  
Plastic Properties ◽  
Similar Chemical ◽  
Crucible Furnace ◽  
Successive Generations

This paper presents the chemical and phase composition, microstructure, and selected properties both at room temperature and at the temperature corresponding to the expected operating conditions of three successive generations of TiAl-based alloys (Ti-47Al-2W-0.5Si, Ti-45Al-8Nb-0.5(B,C), and Ti-45Al-5Nb-2Cr-1Mo-0.5(B,C)-0.2Si) melted in a vacuum induction furnace with high-density isostatic pressed graphite crucibles. The obtained results of mechanical and physical properties of the produced alloys were compared to the properties of reference alloys with similar chemical composition and melted in a cold copper crucible furnace. The effect of increased carbon content in the produced alloys due to the degradation of the graphite crucible during melting is higher strength properties, lower plastic properties, higher coefficient of thermal expansion, and improved creep resistance. It was shown that the proposed technology could be successfully used in the production of different generation TiAl-based intermetallic alloys.

scholarly journals Mechanical Response of Al-1.09Mg2Si Alloy under Varying Mould and Thermal Ageing Conditions

2012 ◽  
Vol 2012 ◽  
pp. 1-7
Author(s):  
O. I. Sekunowo ◽  
G. I. Lawal ◽  
S. O. Adeosun
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Ambient Temperature ◽  
Mechanical Response ◽  
Ageing Time ◽  
Thermal Ageing ◽  
Alloy Ingot ◽  
Solution Treated ◽  
Crucible Furnace

Samples of the 6063 (Al-1.09Mg2Si) alloy ingot were melted in a crucible furnace and cast in metal and sand moulds, respectively. Standard tensile, hardness, and microstructural test specimens were prepared from cast samples, solution treated at 520∘C, soaked for 6 hrs, and immediately quenched at ambient temperature in a trough containing water to assume a supersaturated structure. The quenched specimens were then thermally aged at 175∘C for 3–7 hrs. Results show that at different ageing time, varied fractions of precipitates and intermetallics evolved in the specimens’ matrices which affect the resulting mechanical properties. The metal mould specimens aged for four hours (MTA-4) exhibited superior ultimate tensile strength of 247.8 MPa; microhardness, 68.5 HV; elongation, 28.2% . It is concluded that the extent of improvement in mechanical properties depends on the fractions, coherence, and distribution of precipitates along with the type of intermetallics developed in the alloy during ageing process.

Numerical simulation of the flow streams behavior in a self-regenerative crucible furnace

2010 ◽  
Vol 30 (8-9) ◽  
pp. 826-832 ◽  
Author(s):  
Francisco Cadavid ◽  
Bernardo Herrera ◽  
Andrés Amell
Keyword(s):  
Numerical Simulation ◽  
Crucible Furnace

scholarly journals On melt motion in induction crucible furnace

2017 ◽  
Vol 2 (4) ◽  
pp. 3-10
Author(s):  
Геннадий Левшин ◽  
Gennady Levshin
Keyword(s):  
Crucible Furnace

Cooler for obtaining crystals in a crucible furnace

2003 ◽  
Vol 36 (3) ◽  
pp. 950-950
Author(s):  
B. Cabric ◽  
A. Janicijevic
Keyword(s):  
Crystallization Rate ◽  
Test Tube ◽  
Temperature Gradients ◽  
Tube Test ◽  
Air Cooler ◽  
Crucible Furnace

An air cooler (`cold key') is presented with a movable branchy Tamman test tube (`test comb') installed in a laboratory crucible furnace for regulation and simultaneous crystallization tests at different temperature gradients and crystallization rate intervals, with the purpose of obtaining crystals. This method can also be applied in tube or chamber furnaces.

scholarly journals Effect of Degassing Treatment on the Interfacial Reaction of Molten Aluminum and Solid Steel

2017 ◽  
Vol 17 (2) ◽  
pp. 227-239 ◽  
Author(s):  
T. Triyono ◽  
N. Muhayat ◽  
A. Supriyanto ◽  
L. Lutiyatmi
Keyword(s):  
Electron Microscope ◽  
Intermetallic Compound ◽  
Scanning Electron Microscope ◽  
Interfacial Reaction ◽  
Immersion Time ◽  
Molten Aluminum ◽  
Furnace Lining ◽  
Brittle Phase ◽  
Crucible Furnace ◽  
Scanning Electron

AbstractThe gas porosity is one of the most serious problems in the casting of aluminum. There are several degassing methods that have been studied. During smelting of aluminum, the intermetallic compound (IMC) may be formed at the interface between molten aluminum and solid steel of crucible furnace lining. In this study, the effect of degassing treatment on the formations of IMC has been investigated. The rectangular substrate specimens were immersed in a molten aluminum bath. The holding times of the substrate immersions were in the range from 300 s to 1500 s. Two degassing treatments, argon degassing and hexachloroethane tablet degassing, were conducted to investigate their effect on the IMC formation. The IMC was examined under scanning electron microscope with EDX attachment. The thickness of the IMC layer increased with increasing immersion time for all treatments. Due to the high content of hydrogen, substrate specimens immersed in molten aluminum without degasser had IMC layer which was thicker than others. Argon degassing treatment was more effective than tablet degassing to reduce the IMC growth. Furthermore, the hard and brittle phase of IMC, FeAl3, was formed dominantly in specimens immersed for 900 s without degasser while in argon and tablet degasser specimens, it was formed partially.

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