Ball surface heat treatment induction heating surface hardening

Web Design And Seo For www.china-webdesign.com

industrial bearings - China Manufacturer

Thank you for inquiry my industrial bearings, Tel : 0086-0379-64390888, E-mail: liuping@lyzyc.cc

http://www.lyzycbearing.com/key-industrial-bearings-23/

Definition: is using a certain method to produce a certain frequency induction current, so that the workpiece surface to the rapid heating of the surface of the part, and then rapidly quenching a heat treatment method of operation of the cooling.slewing bearing
Principle: electromagnetic induction generated induction current with the frequency of the vortex. The eddy current distribution is uneven in a cross section of the workpiece, and the central portion is almost zero, and the surface current density, referred to as the "skin effect", the higher the frequency, the great current density surface layer thinner. Rely on this current and the workpiece itself resistance, so that the surface of the workpiece is rapidly heated to the quenching temperature and the temperature of the core section remain close to room temperature, and then immediately water cooling, so that the surface hardened.
Category: induction heating can be divided into three categories:precision ball bearing
(1) high-frequency heating
The commonly used frequency (200 ~ 300) K HZ, hardened layer depth (0.5 to 2.5) mm.
(2) IF heating
Commonly used frequency (2500 ~ 8000) HZ, the depth of the hardened layer (2 to 10) mm.
 (3) frequency heating
The current frequency of 50HZ, audio equipment is not required, the city with the AC can be hard layer depth (10 ~ 20) mm above the city with AC that.
The advantages and disadvantages: induction heating surface hardening heating speed, high productivity, the heating temperature and the depth of the hardened layer is easy to control, the ball surface oxidation and decarbonization less deformation of small steel balls, can make all the quenching process of mechanization and automation.spindle bearings