Pioneers in Induction and Flame Hardening

Subbaiah Enterprises (Peenya)

Founded in 1986 in Yelahanka, Bengaluru, Subbaiah Enterprises has grown into one of South India’s premier Induction and Flame Hardening facility, serving diverse sectors of the manufacturing industry across India. With nearly four decades of expertise, we have built a reputation for precision, reliability, and innovation in heat treatment solutions.

A Legacy of Excellence and Expansion :- To meet the evolving demands of the industry, we have expanded our operations to a modern 10,000 sq. ft. facility in Peenya, Bengaluru. This state-of-the-art infrastructure is equipped with advanced technology to deliver superior hardening solutions that enhance component durability, wear resistance, and performance.

What is Flame Hardening?

Flame Hardening is a thermal process in which the surface of a steel component is rapidly heated using an oxy-fuel flame (typically oxy-acetylene or oxy-propane), followed by immediate quenching. This rapid heating and cooling cycle transforms the surface microstructure into martensite, significantly increasing hardness while preserving the core’s mechanical properties.

  • Surface temperatures reach ~850°C–950°C.

  • Quenching media typically include water sprays or air-mist systems.

  • Applicable steels include medium and high-carbon steels, alloy steels, and cast irons.

  • The process is ideal for components that must withstand high surface stress, abrasion, and repeated loading cycles..

Why Choose Flame Hardening?

  • Selective Hardening: Harden only where needed—no full-part treatment required.

  • Minimal Distortion: Excellent for parts that are large, irregular, or difficult to machine post-treatment.

  • Cost-Effective: Especially suitable for large components that are uneconomical to process in a furnace.

  • Enhanced Wear Resistance: Dramatically improves component life under high-friction conditions.

  • Tough Core, Hard Surface: Achieve an optimal combination of hardness and ductility.

Our Technical Expertise

    As pioneers in flame hardening, Subbaiah Enterprises brings unmatched process understanding and control:

  • Flame Pattern Customization: We design and tune flame heads based on part geometry, section thickness, and required hardness depth.

  • Accurate Temperature Control: Use of optical pyrometers and infrared sensors to maintain consistent surface heating.

  • Case Depth Optimization: Ability to achieve hardening depths of 0.5 mm to 3 mm, depending on component requirements.

  • Process Simulation and Trials: Pre-hardening trials ensure optimal parameter selection and zero rework.

  • Integrated Quality Systems: Every batch is tested for hardness (Rockwell/C-scale), case depth (macro/micro), and structural integrity.

Equipment Capabilities

    Our dedicated flame hardening bay in Peenya is engineered to handle high-precision jobs with flexibility and scalability:

  • Motorized Flame Hardening Machines with programmable feed and traverse systems

  • Multi-Torch Configurations for simultaneous hardening of wide surfaces or multiple zones

  • Oxy-Acetylene and Oxy-Propane Torch Systems for fine control over flame temperature and penetration

  • Custom Fixturing and Tooling for odd-shaped or large-dimension components.

  • In-line Water Spray Quenching Systems with pressure and flow control.

  • Offline Hardness Test Stations with Rockwell, Brinell, and Vickers capability

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