Investigation of Cleanness of Fe-Si-B Alloy Steel
Date Issued
2011
Date
2011
Author(s)
Feng, Tian-Rung
Abstract
Fe-Si-B amorphous alloy ribbon is an important material, mainly used in motor and transformer cores. Transformer’s quality, performance, and life will be affected by its cleanness. The study explores the cleanness of Fe-Si-B amorphous alloy ribbon between different components, the status of inclusion for holding temperature different times and analysis of inclusion in the product.
The study will be achieved as followings: First, calculating the phase diagram distribution and melting point of different components by thermodynamic calculation software Thermo-calc to examine the experiments. Then observing the composition and morphology of inclusion by SEM and measuring the numbers of inclusions, total amount of O & S, and porous size. After that, measuring melting point and surface tension of steels by high-temperature contact angle measuring instruments.
The results showed that the melting point error is less than 5% between simulation and real, and the surface tension decreased by increase of porosity and amounts of O & S. For inclusion analysis, there are three basic components as follows: (Ca-Si-Al-Mg)Ox, . MnS, and Al2O3.
The study will be achieved as followings: First, calculating the phase diagram distribution and melting point of different components by thermodynamic calculation software Thermo-calc to examine the experiments. Then observing the composition and morphology of inclusion by SEM and measuring the numbers of inclusions, total amount of O & S, and porous size. After that, measuring melting point and surface tension of steels by high-temperature contact angle measuring instruments.
The results showed that the melting point error is less than 5% between simulation and real, and the surface tension decreased by increase of porosity and amounts of O & S. For inclusion analysis, there are three basic components as follows: (Ca-Si-Al-Mg)Ox, . MnS, and Al2O3.
Subjects
Amorphous alloy ribbons
Surface tension
Contact angles in high temperature
Inclusion
Type
thesis
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