Induction Hardening Service

Our induction hardening service is a localized heating process to selectively harden metal parts or components. A solid-state electric power supply sends an electrical current through an inductor coil wrapped around the surfaces of the part to be heated. The induction coil generates an electromagnetic field that selectively heats only the surface of the metal part within the coil. Induction heating generates accurate and focused heat at the surface of the workpiece, without affecting the entire part.

Bluewater specializes in selective hardening of gears, sprockets and powder metal components, and their induction equipment is fully automated to handle high volume production orders. After induction hardening treatment, components can be evaluated in their metallurgical laboratory using magnetic particle inspection equipment. Rust preventive may also be applied after tempering. Bluewater's induction capabilities are available at their Ridgway, Pennsylvania site, and they can service specific types of components.

Bluewater's technicians consider a variety of characteristics during process design prior to performing the induction hardening service such as:

  • The geometry of the part and surface requiring localized heating 
  • The type and shape of inductor coil needed 
  • The amount of electrical current required 
  • The frequency of the alternating magnetic field required
  • The density of the material 
  • The permeability of the material 
  • The time the material is exposed to heat
  • The work piece material chemistry 
  • The final case depth and hardness levels desired

Bluewater's facility in Ridgway, PA specializes in induction hardening of powdered metal components.

Properties of Induction Hardening Components

  • Very quick and efficient process with rapid heating
  • Allows for localized hardening
  • Depth of surface layer hardened can be varied to meet customer requirements
  • The core of the material remains cold during processing and its original properties are unaffected after induction hardening is complete
  • Very little distortion and size change as only a portion of the part is exposed to heating for a short time
  • Typically performed on carbon and alloy steels with a carbon content between 0.30% and 1.00% C
  • Process is uniform, repeatable and controllable
  • High control over quality
  • Different methods of induction hardening can be employed such as single shot hardening and traverse/scan hardening
  • Multiple parts can be treated in a single cycle with some induction machines
  • Can be performed on single pieces to large production volume runs
  • Material costs are reduced as process is compatible with lower hardenability, lower cost alloys
  • Increases durability and resistance to wear

Applications of Induction Hardening Service

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We provide a comprehensive list of services that can be combined to provide a perfect process for your components.
North America's thermal processing specialists are ready to serve you from our multiple locations.
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