Effect of Phosphorus on the Magnetic Losses of Non-oriented 2% Si Steel

Abstract

The effect of P, ranging from 0.0 to 0.10 mass%, on the core losses of electrical steels containing 2.0 mass% silicon has been investigated. The core losses were separated into hysteresis losses, classical eddy current losses and anomalous losses. The hysteresis losses were found to decrease with increasing P content due to a larger grain size brought about by P additions. The anomalous losses were proportional to the square root of the grain size, and decreased with increasing volume fraction of grains with a ND || <111> orientation. The lowest anomalous losses were obtained at 0.05 mass% P content.

Correlation between Magnetic Properties and Chemical Composition of Non-Oriented Electrical Steels Cut through Different Technologies

“…The average grain size <s> was determined through optical microscopy method, shown in Table 4: The excess (anomalous) energy losses is directly linked to the domain wall motion and it is influenced by the grain size and the crystallographic texture. The Si and P percent has an important effect on the excess loss, by increasing the grain size [43]. It is well known that the main contribution to the total energy loss is accountable to the hysteresis loss component, but the existence of the precipitated impurities' content or larger grain size makes the excess loss to become important.…”

Review of Magnetic Properties and Texture Evolution in Non-Oriented Electrical Steels

“…It has been reported that P additions impede {554}<225> texture [90] and {111}<112> texture [91], and may also decrease the grain size before the cold-rolling process [90]. Other studies have also been conducted on the influence of different P contents in electrical steels [90][91][92][93]. Samples with 0.099 wt.% P exhibited better magnetic properties than 0.013 wt.% P samples.…”

Comprehensive Influence of the Normalized and Final Annealing Process on High‐Strength Nonoriented Silicon Steel

“…This may be due to the complex effect of texture and grain size and other microstructure characteristics on various loss components when the frequency increases, [35] but it has nothing to do with the annealing time. [37] No matter what factors affect the high-frequency iron loss, the lowest value obtained through process control must exist. Magnetic properties and mechanical properties were often irreconcilable in high-strength nonoriented silicon steel.…”