Composition/Microstructure Control Technology

In addition to strength and formability, special functions such as magnetic shielding, etc. are required in steel sheets for electrical appliance. JFE Steel responds these customers' requirements with advanced alloy design.

Crystallographic orientation mapping by the electron backscattering diffraction pattern (EBSP) method (Mechanical properties, magnetic properties, etc. are controlled by controlling the crystal orientation.)

Transmission electron microscope (TEM) photograph (Grain growth, etc. is controlled by controlling precipitates.)

Chemical Conversion Coating Technology

Chromate-free chemical conversion coated steel sheets are environment-friendly products with a high corrosion resistance capacity, and are widely used in fields that include home electrical appliances, electrical equipment, and others. JFE Steel responds to diverse needs with advanced chemical conversion treatment technology realizing ultra-thin film treatment.

Cross-sectional TEM image of chromate-free chemical conversion coated steel sheet and examples of its applications

Organic Coating Technology

Layer structure of precoated steel sheet (precoated metal: PCM)

Coating equipment which simulates actual machine

In addition to the basic properties of coating appearance and corrosion resistance, organic coated steel sheets for electrical appliances must posses other functions, including formability, weathering resistance and chemical resistance, etc. JFE Steel solves problems by advanced coating film composition design/coating technology.

Layer structure of high corrosion resistance precoated steel sheet and edge corrosion resistance (salt spray test: SST, 240h)

Utilization/Evaluation Technologies

Example of formability simulation

Utilizing a database based on structural and property evaluations of various kinds of home electrical appliances and simulation technologies which make it possible to predict formability, thermal hydraulics, and product life with high accuracy, JFE Steel supplies material utilization technologies which meet customers' needs.

Example of simulation of thermal stress accompanying heat generation in semiconductor