What is Induction Hardening?

Friends, in this post, what is called induction hardening? It has been told about, if you want to get information, then read the post completely.

What is Induction Hardening?

It is a process of case hardening, in which high frequency current is used to harden or harden the outer surface of the job.

In the high frequency induction process, heat is generated by the current generated inside the job, because the flow of current is more on the outer surface of the job, so the heat generated by the induction current increases the temperature of the outer surface of the job.
Due to the higher frequency of the induction current, more heat is generated on the outer surface of the job.

To perform this process, the induction coil is first wrapped over the job, this coil consists of several loops made of copper tubes, which allow water to flow inside them to keep them cool. When a high inductance current flows through this coil, a magnetic field is created, which varies in magnitude and direction.

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When these magnetic lines pass through the part placed inside the coil, then a current of the same frequency is generated in its surface. Due to the resistance of the metal, the job surface heats up to the upper critical point within a few seconds.

After this job quenching is done. After which the outer surface of the job hardens, but a defect called thermal stress develops in the job. To remove this defect, redo the job 200°C It is heated and cooled in air.

What is Quenching?

When a metal or job is heated to make it hard, the method of cooling that job with water is called quenching it is said.

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