Metal Heat Treatment: Heating Treatment of SUJ2 Round Bars by μ High-Frequency Quenching

The original characteristics of high-frequency quenching treatment can also be achieved with small diameter round bars such as φ3.

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.

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