New Rotors Induction hardening machine
Progressing cavity pumps
Rotors Induction hardening machine – Impianto di tempra rotori
New induction machine for hard rotors.
Hardening Steel
Steel hardening consists of heating the material to a temperature over 723ºC (austenitic temperature) and then cooling the steel quickly, with a quench of industrial water. The aim of this induction heating application is to transform the structure of the steel in order to increase its hardness, its yield strength,and its breaking tension.
One of the advantages of induction heating is that it can be directed to specific areas of the part with great accuracy. Most hardening operations treat the outer part surface. The degree of hardening is controlled by varying the power applied, the frequency of the inductor current and the heating and cooling times. The treatment can be done in two different ways: either static or progressive (by scanning).
We use scanning treat.
The scanning treatment consists applying heat to the rotor with a continuous operation, by moving either the part or the inductor. With progressive scanning, relatively larger surface areas can be hardening with lower power.
Induction heating
Induction heating, is a process for increase temperature in a workpiece, made in material with electromagnetic property, place into an alternate electromagnetic field.
The principle of induction heating is similar to a transformer.
The coil (inductor), becomes primary circuit winding and it surround workpiece that will be heat.
The workpiece is secondary circuit winding, made as single coil in short circuit.
Supply by alternating current primary winding (inductor) creates a magnetic field, that induces alternating current (eddy currents) in the workpiece. Flowing of eddy currents cause heating in workpiece (Joule effect).
The depth of eddy currents flow in workpiece and the heating distribution as consequence, depends on current frequency in the inductor and electromagnetic material properties (permeability and resistivity).
Induction heating, compare with other traditional heating systems (gas or electric furnaces), it is the way with more advantages as: fast heating for high temperature too, heating precisions, heating available immediately when required (no delay time), no large space need, etc.