Application of Flame-Hardening

Application of Flame-Hardening
Points : Application of Flame-Hardening

Flame hardening is used because:

1. Parts are very large, making conventional healing and quenching impracticable. or uneconomical, such as large gears, rolls, etc.
2. Only a small region of the component needs heat treatment, or if the whole surface is heated. it may be detrimental to the function of the part, such as wearing surfaces of cams.
3. Exact dimensions or its control is impracticable or difficult by normal through hardening. For example flame hardening of teeth of very large gears shall not; disturb the dimensions of gears.
4. Cheaper steels could be used if flame hardened. Also the parts are hardened with little oxidation and decarburization.