Flame Hardening Gears

Gear Flame Hardening for Various Steel Grades

The flame hardening process produces a hardened case layer on the gear in the heat affected zone. The core of the gear remains relatively unheated and ductile.  This process will provide a strong wear surface on the flame hardened area and may allow for gears to be made from less expensive alloys in cases where through hardening is not required.

Capability

All flame hardening of gears is performed on ThermTech’s fully automated flame table equipped with infrared temperature control, ensuring that the gear is fully and uniformly heated prior to quenching. This also allows for more precise control of the hardened case depth from part to part.

ThermTech also has the ability to custom-design tooling for any flame-hardening job, especially in cases with unique part geometry. Please be aware that if this is necessary it will add 2-4 weeks depending on the exact design needed.

Recommendations

ThermTech offers flame hardening of gears for components up to up to 45” in diameter and a max weight of 2500 pounds. ThermTech’s flame hardening processes span a wide range of gear alloys, including the following:

  • Flame Hardening 1045 Gears
  • Flame Hardening 1060 Gears
  • Flame Hardening 4140 Gears
  • Flame Hardening 4340 Gears

Flame hardening is a good processing option for very large gears that may be impractical to perform a whole-part quench & temper or carburizing process on. It should also be considered as an option in cases of very tight dimensional tolerances, as the smaller heated area may result in less distortion. If hardness is only required on a small segment or particular surface of the gear, flame hardening should also be considered.

It is strongly suggested that all flame hardening jobs go through the formal quotation process to insure that all aspects of the job can be performed to customer satisfaction.

Contact a sales representative today to learn more about how our flame hardening process can benefit your gear products!