ABSTRACT
This chapter discusses the use of induction heating (IH) for a large group of applications where metallic workpieces are heated before forging, forming, extrusion, bending, coating, drying, and the like. Wrought steels are typically more ductile, homogeneous, and structurally sound than cast steels and can take much greater thermal gradients during IH. The chapter focuses on the specifics of IH stainless steels in mass heating applications. Superalloys are used in numerous industries including aerospace, medical, and petrochemical, just to name a few. The thermodynamics of the iron oxidation can be quite complex, involving different stages and forms of oxides. Wagner's theory is often used to quantify an oxidation process. Accelerated heating is typically used for heating small- and medium-sized workpieces that have sufficient toughness. The goal of IH of steel cylinder billets is to raise the billet temperature to the level where it is plastic enough to be forged or extruded or to employ other processes involved with plastic deformation.
