CLAD MATERIAL FOR INDUCTION HEATING AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To provide a clad material for induction heating and its manufacturing method excellent in the temp. controllability and capable of effectively utilizing the magnetic characteristic inherent in a thermo-sensitive magnetic substance. SOLUTION: A clad material 1 for induction heating is structured so that a metal material 3 having a good thermal conductivity is joined with a thermo- sensitive magnetic substance 2 whose magnetic permeability varies with temp. The temp. change rate dμ/dT of permeability at the Curie point of the thermo- sensitive magnetic substance 2 is made over 10 when the maximum and minimum of permeability around the Curie point of the substance 2 are made 100 and 1, respectively. One favorable example of thermo-sensitive magnetic substance 2 is Fe-Ni-Cr alloy having Curie point around 400-600 deg.C, while that of the good thermal conductivity metal material 3 is a metal chiefly containing Al or Cu.