Tool Steel Manufacturer, and Special Steel Stockholder
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annealing furnace annealing Annealing annealing furnace

annealing furnace

annealing furnace 2 annealing Annealing annealing furnace 2

annealing furnace 2

annealing annealing Annealing annealing


Full Annealing

Full annealing is the process of slowly raising the temperature about 50 ºC (122 ºF) above the Austenitic temperature line A3 or line ACM in the case of Hypoeutectoid steels (steels with 0.77% Carbon).

It is held at this temperature for sufficient time for all the material to transform into Austenite or Austenite-Cementite as the case may be. It is then slowly cooled at the rate of about 20 ºC/hr (36 ºF/hr) in a furnace to about 50 ºC (122 ºF) into the Ferrite-Cementite range. At this point, it can be cooled in room temperature air with natural convection.

The grain structure has coarse Pearlite with ferrite or Cementite (depending on whether hypo or hyper eutectoid). The steel becomes soft and ductile.

Process Annealing

Process Annealing is used to treat work-hardened parts made out of low-Carbon steels (Stress Relief Annealing

Stress Relief Annealing is used to reduce residual stresses in large castings, welded parts and cold-formed parts. Such parts tend to have stresses due to thermal cycling or work hardening. Parts are heated to temperatures of up to 600 – 650 ºC (1112 – 1202 ºF), and held for an extended time (about 1 hour or more) and then slowly cooled in still air.

We can supply follows heat treatment services:

Normalizing, Annealing, Quenching, Tempering, Carburizing, Nitriding, High-frequency surface hardening and other processing services.

And we can strictly enforce the national standards.

And we have follows heating equipment:

  Pit furnace: Dia1300mm max, Length9500mm max.
  Salt bath furnace: Length1900mm max, Width1600mm max, Height900mm max.
  Trolley furnace: Legth15000mm max, Width6000mm max, Height6000mm max.
Tunnel type continuous reheating furnace:dia30mm-dia250mm
Induction quenching line: dia15mm-dia120mm
Normalizing cooling fan can be used in combination of wind capacity air-cooled systems.