Size Distribution of Deoxidation Products with Ti, Pr and Ti/Pr in Fe–10mass%Ni Alloy

Abstract

Deoxidation experiments using Ti, Pr and Ti/Pr have been conducted using a Fe-10 mass% alloy at 1 600°C. The purpose of the experiments was to study the change of particle size distribution as functions of holding time, difference between the different deoxidation procedures, and amount of deoxidant added. The Fe-10%Ni alloy was melted in a induction furnace and Ti, Pr or Ti/Pr were added as deoxidants. Samples were taken at different times after the addition of deoxidants. Thereafter, particles from each sample were extracted using electrolytic extraction. These particles where then examined in a SEM and image analyzer. Results show that the peak height of the size distribution decreases and the modal value increases with an increasing holding time. Furthermore, that the number of particles increases with an increase of deoxidant for a given initial oxygen content and holding time. The size distribution in case of the complex deoxidation using Ti followed by Pr deoxidation was also compared with deoxidation using only Pr.

Effect of the Ti, Al Contents on the Inclusion Characteristics in Steels with TiO2 and TiN Particle Additions

“…The middle part of the bar was cut into a specimen with a size of about 15 × 14 × 5 mm. The particle size distribution was obtained on a filter after electrolytic extraction of a small metal piece . The sample was extracted using a potentiometric electrolytic extraction technique (4 V and 50 mA) so that the total amount of the charge reached 500 Coulomb for a 10% acetylaceton electrolyte (AA) solution.…”

“…The particle size distribution was obtained on a filter after electrolytic extraction of a small metal piece. [15][16][17][18] The sample was extracted using a potentiometric electrolytic extraction technique (4 V and 50 mA) so that the total amount of the www.steel-research.de charge reached 500 Coulomb for a 10% acetylaceton electrolyte (AA) solution. The selection of the electrolyte was done based on previously successful studies of Ti 2 O 3 and Al 2 TiO 5 particles by Inoue et al [19] The amount of dissolved metal was about 0.12 g. The electrolyte solution was filtered by using a polycarbonate (PC) membrane filter with an open pore size of 0.05 mm (47 mm in diameter).…”

Determination of Steel Cleanliness in Ultra Low Carbon Steel by Pulse Discrimination Analysis-Optical Emission Spectroscopy Technique

“…The methodology employed to obtain the inclusion size distribution was comparable to the one employed by the previous researchers. 16) 3.4.1. Inclusion Size, Composition and Size Distribution by the Inclusion Extraction Technique The size, composition and morphology of the inclusions for various Tundish samples analyzed are shown in Fig.…”

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“…have been extensively measured by Suito's group. 7,8,10,33,34) A potentiostatic electrolytic extraction was employed to dissolve the metal sample. The particles were collected on a filtration membrane and observed by using SEM.…”