Showing papers in "Canadian Metallurgical Quarterly in 2005"

TL;DR: In this paper, the effect of seven different cooling rates on the microstructure and solidification parameters of the 319 aluminum alloy have been investigated by means of thermal analysis, and the cooling curve and its first derivative curve have been plotted by using very accurate thermal analysis equipment.

TL;DR: In this article, the oxide film defects are highly damaging to liquid aluminum alloys, and the oxide films are entrapped in castings to form stable solid inclusions as a consequence of surface turbulence.

TL;DR: Semi-solid metal (SSM) processing routes have attracted the attention of major as-cast auto parts producers due to their many technological and economical advantages as discussed by the authors, which is intended more for technologists than for pure solidification scientists.

TL;DR: In this article, a mandrel-rotary draw tube bending experiments examining the effect of lubricant selection were performed using a fully instrumented Eagle EPT-75 bender.

TL;DR: In this paper, a mathematical model for evaluating the residence time of metal droplets in slag-metal-gas emulsions through top gas blowing is proposed, based on the equation of accelerated moving bodies in a moving fluid.

TL;DR: Significant tensile-compressive yield asymmetry was observed in both low and high pressure die cast polycrystalline magnesium alloys AM50, AE44 and AJ62A between room temperature and 125 °C as discussed by the authors.

TL;DR: In this article, the influence of various factors in a tundish such as a floating particle sink, a flow modifying impact pad and a gas bubbling block on inclusion separation was compared.

TL;DR: In this article, the application of microwave energy for the pretreatment step of manganese carbonate ores was investigated and a significant peak was observed during the calcination process and this was attributed to the migration of ions in the lattice.

TL;DR: In this article, the high temperature dip technique has been used to investigate the corrosion of MgO refractory in SiO2-CaO-FeOx-MgO slag and Al2O3-SiO 2-Ca O-FeO-O-CoCo-Co-FeCo-MoO-MoCo-OmOx-Al2O 3 at 1530 °C.

TL;DR: In this paper, the ternary Mg-Al-Ca phase diagram was constructed by combining the three constituent binary systems of MgAl, Al-Ca and MgCa.

TL;DR: Sodium penetration in the carbon lining of the aluminum electrolysis cell is an important cause of cell failure and efficiency loss as discussed by the authors, and this phenomenon and its consequences are reviewed in this paper.

TL;DR: In this paper, numerical simulations were carried out to define the spatial distribution of velocity, temperature and compositional variation in a hot dip galvanizing bath and identify critical periods and zones within the bath where dross formation can occur within an operating cycle.

TL;DR: In this paper, the application of microwaves for the drying of a briquetted nickeliferous limonitic laterite ore, was investigated and it was found that the microwave drying rates were two to three times higher than the conventional drying rates.

TL;DR: In this article, the corrosion characteristics of five permanent mold magnesium alloys were studied using two techniques, namely scanning reference electrode technique (SRET) and electrochemical noise (EN).

TL;DR: In this article, a procedure for the evaluation of latent heat of primary and eutectic solidification of grey cast iron from cooling curves based upon the Newtonian cooling principle was presented.

TL;DR: In this article, a new foaming agent, calcium carbonate, along with an appropriate technique are suggested to improve the metal structure and control the foaming process, and the results showed that the applied coating enhances wetting of the agent particles and improves the homogeneity of the foam.

TL;DR: In this article, a fundamental equation to predict residual carbon in slags was developed and a relative reaction rate parameter to determine gasification rate and evaluate the rate limiting step has been found.

TL;DR: In this article, the authors reviewed the history, developments and 10 milestones of the oxygen steelmaking processes with a special focus on conventional autothermic converters, high speed converters with a blowing rate up to 5 m3 n/t min (Normal m3 of O2 per metric tonne of steel per minute) with coal addition, post-combustion and the possibility to increase the scrap rate by 50%.

TL;DR: In this paper, a steady state simulator was constructed that generates gas and pellet temperatures in the pellet bed and gas flow rates and pressures in the different zones of the furnace.

TL;DR: In this paper, the influence of angle of inclination of a cyclone on its cut size was studied in a specially designed laboratory rig equipped with a 75 mm Krebs cyclone.

TL;DR: In this article, Nishimura et al. showed that the dissolution of annabergite reaches equilibrium after 15 days and the long-term solubilities decrease with increasing pH, reaching the minimum level of 48 mg/L As(V) and 02 mg /L Ni(II) at pH 9.

TL;DR: In this paper, structural changes caused by heating in electroless nickel-phosphorus (EN) coatings developed using EnplateTM commercial bath were investigated at two phosphorus compositions: 4.5 wt% (low phosphorus EN) and 11.3 wt%, and the results showed that the microstructure of EN coatings is significantly affected by post-coating heat treatment which causes the precipitation of nickel crystallites and various forms of nickel phosphides.

TL;DR: In this article, the electrolysis of liquid fayalite slags was carried out at 1250 °C using a liquid copper cathode and an inert platinum anode.

TL;DR: In this paper, the methode de Taguchi was used to determine the optimum conditions for the dissolution of ulexite in ammonium sulphate solutions, and the results showed that the predicted and experimental dissolution percentages of Ulexite were 98.60 and 98.36 per cent, respectively.

TL;DR: In this paper, the authors examined the effect of water flow rate (0.63 to 3.15 L/s), water temperature (13 to 40 °C), stand-off distance or distance between the nozzle and surface of the sample (81 to 158 mm) and a large and small diameter cone spray nozzle on the boiling water behaviour during quenching of AISI 316 12.7 mm stainless steel circular plate samples.

TL;DR: In this paper, the development of the segmented intercell bars technology for copper electrometallurgy, applicable on both electrorefining (ER) and electrowinning (EW), is summarized.

TL;DR: A transpiration method was used to measure the equilibrium volatilization rate of antimony and to evaluate the activity coefficient of Sb (γsb) in Cu-Fe mattes and white metal as discussed by the authors.

TL;DR: In this paper, the reduction behavior of three industrial nickel oxides was investigated in both isothermal and non-isothermal reduction experiments and it was shown that the reaction followed the topochemical model.

TL;DR: In this article, the formation of ultrafine ferrite by strain induced transformation is assessed using rolling and hot torsion experiments and the important factors for the production of ultra fine ferrite are described and a mechanism is proposed.

TL;DR: Using the seven dimensional linear regression method, new empirical formulae for the austenite and martensite start temperatures and transformation thermal hysteresis associated with the Martensite transformation observed in the Fe-Mn-Si-Ni-Cr-Ce-Ti-N shape memory alloys are obtained as mentioned in this paper.