SCANNING INDUCTION HARDENING

摘要

A scanning induction hardening process in which a steel workpiece is surface hardened by progressively traversing its length with an inductor coil energised by an alternating electric current and immediately thereafter quenching the heated portion of the workpiece characterised in that straightening of bends in the workpiece being surfaced hardened is controlled during the induction hardening process by monitoring the straightness of the workpiece and utilising information thereby obtained to control the heating and quenching of the workpiece in such a manner that a layer of hardened material of greater thickness is formed on the concave side of any bend in the workpiece such as to produce a straightening moment acting to remove the bend.