Jozef Dilewijns

Effect of hot rolling parameters on the magnetic properties of a low-silicon ultra-low-carbon steel

Abstract An ultra-low-carbon steel was hot rolled with various reheating, finishing and coiling temperatures. A significant reduction of the core losses after cold rolling and annealing can be obtained by lowering the slab reheating temperature, which results in a coarser precipitate structure and final grain. The magnetic induction can be increased by realising a coarse hot band grain structure.

Relation between magnetic properties and changes in dislocation and cell structure due to cold deformation.

Abstract The deterioration of magnetic properties due to plastic deformation is examined as a function of the degree of cold work in the range of strains 0–0.15. The deformation mode is varied. Laboratory cold rolling without tension is compared with purely tensile deformation. The magnetic properties — measured before and after magnetic aging — are related to microstructural changes.

Hot strip processing of low carbon enameling grades in the range of 600 to 700 °C

The processing of continuously cast low carbon steel grades for enameling usually requires a high coiling temperature. Low-temperature coiling, however, is required to ensure deep drawability. A steel composition characterized by low AIN leads to a material combining both good formability and enamelability ratio for hot strip coiling temperatures in the range of 600 to 700 °C. The influence of the coiling temperature on the mechanical properties, cementite morphology, H permeation, and enamel adhesion was studied in detail.

THE EFFECT OF CROSS ROLLING ON TEXTURE AND MAGNETIC-PROPERTIES OF NONORIENTED ELECTRICAL STEELS.

The texture change due to a change of cold rolling direction and annealing temperature in the production of 0.6% Si steel sheet is described. Cross rolling results in a very strong (001) component, causing soft magnetic properties in a direction at 45 degrees of the rolling direction. The texture governing mechanism of the primary and secondary recrystallization was oriented growth. The influence of texture on magnetic properties could be shown by measuring the directional properties of the sheet. The correlation between hysteresis losses and induction with texture and grain size was quantified.