Tell you the truth about silicon metal refining technology

The formation of solid CaO and Al2O3 and SiO2 form slag floating on the liquid surface, and the separation of slag and metal silicon is realized during casting, …

Ferrosilicon and Silicon Technology | Request PDF

Abstract This chapter examines the theory and technology of the production of silicon and ferrosilicon alloys. An overview of silica raw materials, silica …

Grain-refinement mechanisms in titanium alloys

Abstract. Despite the importance of the prior-β grain structure in determining the properties of titanium-based alloys, there are few published studies on methods of controlling the size of these grains in commercial alloys. The existing research raises questions about the relative importance of solute elements in grain-refining mechanisms ...

Ferro Alloys – Rima Industrial

FERRO ALLOYS. RIMA is a world leader in the production of silicon-based alloys used in both foundry and steel industries. The raw materials used are of the highest purity, ensuring products with strict quality control. These are environmentally friendly products as one of the primary raw materials, charcoal, is produced at RIMA's own forestry ...

Tell you the truth about silicon metal refining …

The formation of solid CaO and Al2O3 and SiO2 form slag floating on the liquid surface, and the separation of slag and metal silicon is realized during casting, thereby achieving the purpose of reducing Al …

Ferrosilicon and Silicon Technology

The solubility of oxygen in solid and liquid silicon has been studied extensively as it is important for high-quality silicon production. Data analyzed (Schnurre …

Impeding Nucleation for More Significant Grain Refinement

When nucleant particles are potent (e.g., (Delta {T}_{n}) = 0.1 K), grain initiation occurs in a progressive manner over a period of 0.17 s; and the grain initiation rate initially increases ...

REFINING OF FERRO-SILICON

where, CAI is the concentration in the refined ferro-silicon. The tap to tap time has been related to refined ferro-silicon as follows: C =0.1+ (2) 1+22(1-1.25)2 where -u lies between 1.25 to 2.5 hour with the slag basicities between 0.4 to 0.7 for the 500 kg charge. The silicon loss has been reported to he 7.4 percent due to the

Grain-refinement mechanisms in titanium alloys

The use of carbon-, nitrogen-, and oxygen-based grain refiners has been patented and is claimed to result in a grain-size refinement of over 70%, reportedly through a nucleation-based effect.4 Early work identified La, Ni, Y, and Co as grain-refining elements in pure titanium sponge; however, the mechanisms of the refinement have not …

Aluminum master alloys containing strontium, boron, and silicon …

The grain refiner addition was made to A356 or 319 with an initial 15 second stir. Grain refining and modification samples were taken at 1, 3, 5, 15, 30, and 32 minutes. The melt was stirred for 15 seconds immediately before each sample was taken, except for the 15 and 30 minute samples where no stirring was performed before sampling.

Development of low-loss grain-oriented silicon steel

Grain-oriented silicon steel has evolved through improvement of {110}<001> orientation, development of thinner-gage material, and development of magnetic domain refining techniques. Core loss in the mate- rial has been dramatically reduced over the past 40 years. To further improve core loss, mobile domain

Effect of Sr–Grain Refining–Si Interactions on the …

The present study was performed on A356.2 alloy to explore the link between the effectiveness of different grain refiner practices and strontium (Sr) modification on both the eutectic silicon (Si) particle morphology and the final grain size. To achieve this objective, several types of grain refiners were added to the molten alloy at 750 °C in …

(PDF) THE EFFECT OF GRAIN REFINING OF PRIMARY SILICON …

Using the same quality of materials, a primary silicon refiner Al-Cu-P was added to the alloys. The result was an unexpected 40% increase in fluidity for the Al-8%Si alloy.

Metals | Free Full-Text | A Study on the Grain Refining

Grain refinement of magnesium (Mg) alloys has been a major research topic over the past decades as one of the effective approaches to increase their strength and ductility simultaneously. In this study, a brief review of the grain refinement of aluminum-bearing Mg alloys is included to provide an in-depth understanding of the detailed …

Aluminum master alloys containing strontium, boron, and silicon …

@article{osti_6467245, title = {Aluminum master alloys containing strontium, boron, and silicon for grain refining and modifying aluminum alloys}, author = {Setzer, W C and Young, D K and Dunville, B T and Koch, F P and Malliris, R J}, abstractNote = {(1) An Al-Sr-B master alloy is described consisting essentially of, in weight percent, B from …

Grain refinement of primary silicon in hypereutectic Al …

Grain refinement performance comparison of the three master alloys is shown in Fig. 9. It can be seen that the Si-25Mn-10P master alloy exhibits the best grain refinement effect among the three master alloys. The primary silicon attains the grain size of less than 20 µm, which leads to a significant improvement in the mechanical properties [2 ...

Grain refinement of silicon-aluminum alloys with master …

The average grain size of the AlSi7Mg0.3 alloys grain refined with the Al–5Ti–1B and Al–3B grain refiners were 465±102 μm and 156±29 μm, respectively, while their secondary dendrite arm ...

Grain refinement of hypoeutectic Al-7wt.%Si alloy induced …

Grain refining efficiency of Al–5V, Al–3B and Al–3V–1B master alloys in the Al-7wt.%Si alloy were investigated in this study. Al–5V and Al–3B master alloys were obtained from Sichuan Lande Industry Company LTD.. The corresponding chemical compositions from quality certificate reports are shown in Table 1.

Effects and mechanisms of grain refinement in aluminium alloys

Grain refinement plays a crucial role in improving characteristics and properties of cast and wrought aluminium alloys. Generally Al-Ti and Al-Ti-B master alloys are added to the aluminium alloys to grain refine the solidified product. The mechanism of grain refinement is of considerable controversy in the scientific literature. The nucleant effects i.e. which …

Grain refinement of commercially pure aluminum …

The edge-to-edge matching (E2EM) model and electron back-scatter diffraction (EBSD) technique are used to explore the grain refinement mechanism of …

(PDF) Grain refinement by Al-Ti-B alloys in aluminium

The poisoning is mainly due to the reaction between the Zr-containing phase in aluminum alloy and the Al 3 Ti phase or related phase (TiB 2 /TiC) in the refiner [60,[68][69][70].

The effect of grain refinement and silicon content on grain …

TiC x is an excellent composite strengthening particle and grain refiner for Al alloys. However, the stability of TiC x is poor when solute Si exists in Al alloy melts, which significantly depresses its strengthening and grain refining effects. In this work, the destabilization mechanisms of the TiC x particles in Al-Si alloy melt with a composition of …

A Review of Slag Refining of Silicon Alloys

The Mechanism of Ultrasonic Vibration on Grain Refining …

The microstructure of welded joints revealed the presence of large grain sizes and microporosities in copper joints welded without USV, as shown in Figure 7 a,b, in addition to grain growth in the HAZ. Figure 7 c,d show copper joints of GTA spot welds assisted by USV for 6 s. The decrease in the grain size and the reduction of porosities is ...

Additive manufacturing of ultrafine-grained high-strength …

Additive manufacturing, often known as three-dimensional (3D) printing, is a process in which a part is built layer-by-layer and is a promising approach for creating components close to their ...

Grain Refinement of Magnesium Alloys: A Review of Recent …

This paper builds on the "Grain Refinement of Mg Alloys" published in 2005 and reviews the grain refinement research on Mg alloys that has been undertaken since then with an emphasis on the theoretical and analytical methods that have been developed. Consideration of recent research results and current theoretical knowledge has …

Grain refinement in ultrasonicated binary aluminium alloys

Fig. 1 shows SEM microstructures of as-cast and ultrasonicated Al-5 wt.%X (X-Si, Cu and Ni) alloys. Dendritic grains are observed in all the as-cast alloys (Fig. 1 a, c and e).With UST, the microstructure changed from dendritic to fine, globular grains (Fig. 1 b, d and f).Average grain size of all as-cast alloys and ultrasonicated hypoeutectic alloys …

REFINING OF FERRO-SILICON

where, CAI is the concentration in the refined ferro-silicon. The tap to tap time has been related to refined ferro-silicon as follows: C =0.1+ (2) 1+22(1-1.25)2 where -u lies …

Production of Al–Ti–B grain refining master alloys from B2

The first experiment involved the addition into molten aluminium of pre-mixed KBF 4 and K 2 TiF 6 salts of commercial purity, to obtain a standard grain refiner (alloy 1). In the following experiment, KBF 4 was replaced entirely with B 2 O 3, to produce alloy 2. This practice has led to a savings of 84 g of particulate charge per kilogram of ...

A Review of Slag Refining of Silicon Alloys | SpringerLink

Plotted alongside Jakobsson's data10 are data available from White et al.11 White worked with an Ar + CO atmosphere in the presence of a graphite crucible to create an equilibrium between CO and C and establish a known oxygen potential, ( p_{{{text{O}}_{2} }} ), in the atmosphere.However, as can be seen from Fig. 1, the data …

(PDF) THE EFFECT OF GRAIN REFINING OF PRIMARY …

Using the same quality of materials, a primary silicon refiner Al-Cu-P was added to the alloys. The result was an unexpected 40% increase in fluidity for the Al …

Grain refinement of commercially pure aluminum with …

The edge-to-edge matching (E2EM) model and electron back-scatter diffraction (EBSD) technique are used to explore the grain refinement mechanism of commercially pure Al through the addition of Ti ...

Grain refining effects of the melt thermal-rate treatment …

[3] Li P T, Liu S D, Zhang L L and Liu X F 2013 Grain refinement of A356 alloy by Al–Ti–B–C master alloy and its effect on mechanical properties Mater. Design 47 522–8. Go to reference in article Crossref Google Scholar [4] Birol Y 2012 AlB 3 master alloy to grain refine AlSi10Mg and AlSi12Cu aluminium foundry alloys J. Alloys Comp. 513 ...