Particles Precipitation in Ti- and Al-Deoxidized Hadfield Steels

• The characteristics and precipitation mechanism of particles in titanium- and aluminum-treated Hadfield steel casted during pilot-scale experiments have been studied. Light Optical Microscopy (LOM), Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray Spectroscopy (EDS) are utilized for the particle analysis and characterization. Additionally, thermodynamic equilibrium calculations are performed using Thermo-Calc software. Aluminum oxides, titanium carbon nitrides, titanium carbides, and manganese sulfides are the main types of particles found. The order of precipitation during solidification and chemical composition range of each type of particle are determined. Aluminum oxides are found to act as nucleation sites for titanium carbon nitrides. Thermodynamic equilibrium calculations for particles characteristics are in good agreement with the experimental findings. Titanium carbides are found to form during initial stages of the ferro-titanium additions dissolution.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)

Nyckelord

aluminum

deoxidation

Hadfield steel

particles

titanium

Aluminum oxide

Carbon nitride

Elementary particles

Energy dispersive spectroscopy

Manganese compounds

Scanning electron microscopy

Sulfur compounds

Titanium carbide

Titanium nitride

Titanium oxides

Energy dispersive X ray spectroscopy

Light optical microscopies

Particles precipitation

Pilot-scale experiments

Precipitation mechanism

Thermodynamic equilibrium calculation

Precipitation (chemical)

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)