Flame Hardening Service

Product Description

Basically, it is to leave thecore of the part soft and harden the surface. It is applied to mild steels,alloy steels, cast iron parts and generally medium carbon steels. In flamehardening, the surface is heated by flame without any significant temperaturechange in the interior of the part. The surface of the part is austenitized andthen subjected to quenching.

Any desired surface of thesteel is heated with a flame to the appropriate temperature. When theaustenitization is completed, the steel is quenched and the surface ishardened. In flame hardening, the heat is mostly provided by oxy-acetylene, itcan also be provided with the help of other devices. During the heating phaseof the part, various gases are assisted. Gases such as acetylene and air can beused most of the time, and in some cases propane.

With the appropriate mechanismsthat can be used, the part is easily heated and then cooled quickly. Thehardening depth is adjusted by controlling the values such as flame intensity,heating time, rotational-advance movement speed. There are 4 different methodswhen applying flame hardening; There are different methods such as moving,forward moving, rotary motion and rotary-progressive motion. When applyingflame hardening, it is most important that the person doing the work in manualmechanisms is highly skilled and beyond that, experienced. If excessive heatingis applied to the part, both grain growth and cracks and distortions are seenafter quenching. This is the biggest possible disadvantage of flame hardening.

In flame hardening, quenchingat the end of heating is generally applied by spraying, valid for 4 differentmethods.

The duration of the flamehardening heat treatment is shorter compared to cementation and nitriding.Flame hardening, which is more suitable for cementation and nitration in termsof cost, is more ergonomic than other heat treatments. The devices used areportable and can be adjusted according to the environment and condition.Another important advantage of flame hardening is that it does not cause scaleformation. Scale does not occur, besides, undesirable situations such ascracks, tensile stress or warping do not occur in the steel.