丸眞熱処理工業 List of Products and Services

When high-frequency hardening is applied to φ3SUJ2 (bearing steel), it is very difficult to achieve the characteristics of high-frequency hardening, where the surface is hard and the core remains tough, using existing equipment. This is because the small diameter allows heat to affect the core, resulting in full hardening. However, with the 'μ high-frequency hardening treatment' developed by Marushin Heat Treatment Industry, it is possible to achieve the original characteristics of high-frequency hardening, where the surface is hard and the core remains tough, even for small diameter round bars like φ3. 【Test Piece Measurement Results】 ○ Hardness Comparison → Oil-quenched product: Hardened to the core → μ high-frequency hardened: Forms a hard layer of about 0.5mm, core remains tough ○ Bending Test Results → Oil-quenched: Fractured at 500N → μ high-frequency product: No fracture ○ Product Characteristics (※ Runout at product acceptance: approximately 0.02-0.04mm) → Oil-quenched product: Runout of about 0.3-0.4mm → μ high-frequency product: Runout of about 0.15-0.3mm For more details, please contact us or download the catalog.

• Processing Contract

"μ (micro) high frequency" is a new technology being developed by Marushin Heat Treatment Co., Ltd. It is a high-frequency induction heating treatment that uses frequencies even higher than those traditionally used in high-frequency induction heating, allowing for the formation of a thin hardened layer on the surface of steel materials. This has made it possible to perform surface heating treatments on small diameter round bars, which were previously difficult to achieve. 【Examples of μ high frequency heating treatment】 - μ high frequency heating treatment for S45C - μ high frequency heating treatment for SUJ2 (practical example of linear shaft) - μ high frequency heating treatment for SUS440C For more details, please contact us or download the catalog.

• Processing Contract

Marushin Heat Treatment Co., Ltd. is a comprehensive manufacturer of metal heat treatment that can meet all heat treatment needs, from mass production of products using large-scale heat treatment equipment for carburizing, quenching, and tempering batch processing, to individual heat treatment of molds using vacuum furnaces. We can provide heat treatment tailored to your requirements, from large items and mass production capable of 1,000 kg/batch for carburizing, quenching, and tempering, to precision parts using continuous furnaces. Additionally, to support researchers and developers who are conducting daily research, testing, and prototyping to create mass-produced products, we have established the "Prototyping Convenience Workshop" to offer suggestions and cooperation in heat treatment. If you are a development manager facing challenges such as having too small a quantity or too many conditions to receive heat treatment, please feel free to consult with us. 【Sales Items】 ○ Metal Heat Treatment → Vacuum Heat Treatment → Atmosphere Heat Treatment → High-Frequency Quenching and Tempering, Gas Nitriding → μ High-Frequency Quenching and Tempering ○ Prototyping Convenience Workshop → The concept is "We respond casually to anything, no matter how many." For more details, please contact us or download the catalog.

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• Prototype Services