Fuji Electronics Industry has achieved high-strength, high-precision heat treatment of steel parts using its independently developed "high-frequency induction heating device." Steel parts have the property of increasing in strength through heating and rapid cooling, and high-frequency induction heating technology utilizes high frequency in the heating mechanism.
"The basic principle is the same as an induction cooktop. It doesn't use direct flame, but a high-frequency current is passed through it to generate magnetism. The principle is that heat is generated due to the electrical resistance caused by this magnetism passing through an unheated object," says President Hiroko Watanabe.
The greatest feature of this heat treatment equipment using high-frequency induction heating is its ability to heat materials uniformly and evenly, according to their shape and material properties. Its total system proposals, including cooling systems, have earned it high praise in various industries such as industrial machinery, machine tools, and construction machinery. Furthermore, it boasts a high market share domestically for heat treatment of automotive engine-related parts.
"By using a special coil called a semi-open coil, we can heat-treat parts with complex shapes. The range of steel parts that can be applied to this technology is expected to increase even further in the future. High-frequency induction heating is highly thermally efficient, making it an energy-saving and environmentally friendly technology," says President Watanabe.

The company's processing technology is the result of many years of solid research. Since 2008, the research and development team has been separated into an independent Technical Development Department, and a team of 12 people conducts daily research and development in a research laboratory equipped with prototype machines and other facilities.
The company already holds over 200 patents and utility models. Because of this, many of its engineers are highly dedicated, and developing new equipment involves creating prototypes and engaging in numerous discussions with customers, which takes considerable time.
It's true that it's challenging because the conditions initially assumed change, or cheaper raw materials become available, requiring constant adjustments. Sometimes, heated discussions even occur with clients.

"Because we're a small company, internal communication is easy. We can also have close information exchange between sales and engineers," says the company, highlighting the advantages of being a small to medium-sized enterprise.
Furthermore, they not only focus on their own heat treatment technology, but also emphasize total cost proposals that include the processes before and after it. "Every company is thinking about how to reduce processes and lower costs. It's also important to raise the overall technological level of the industry." This broad perspective on technological development is a major strength of the company.

Contract processing of high and medium frequency heat treatments, manufacturing and sales of high-frequency induction heating equipment and components, manufacturing and sales of electronic application equipment, manufacturing and sales of various automated machinery equipped with induction heating, etc.