Induction-hardened

Induction-hardened describes a material, typically steel, that has undergone a specific heat treatment process called induction hardening. This process uses electromagnetic induction to rapidly heat the surface layer of the material to a high temperature, followed by rapid cooling (quenching). The rapid heating and cooling transform the surface microstructure, creating a hard, wear-resistant outer layer while preserving a tougher, more ductile core. This is primarily done to enhance surface hardness, wear resistance, and fatigue strength, particularly in components subject to abrasion or impact. The depth of the hardened layer can be precisely controlled, making the process ideal for specific applications.

Induction-hardened meaning with examples

• The gears within the heavy-duty transmission were induction-hardened to withstand the extreme stresses and friction experienced during operation. This hardened surface layer ensured that the gears wouldn't wear down prematurely. The process extended the component’s lifespan and reduced the likelihood of mechanical failure, improving reliability and lowering maintenance costs.
• The manufacturer chose induction-hardened components for the rocker arms in their new engine design. This allowed them to create a part that could handle constant high-speed movement with very high surface wear resistance. The durable surface ensured that they could withstand the continuous valve actuation, which is exposed to high amounts of frictional and mechanical strain.
• To enhance the durability of the crankshaft, the engineers specified that its journals should undergo induction hardening. The resulting enhanced surface hardness and wear resistance would prevent abrasive wear and help prevent failure. This would help increase the overall life span of the crankshaft.
• For the construction of heavy machinery's bearing surfaces, induction hardening of the bearing surfaces provides exceptional wear resistance. The hard outer layer of the induction-hardened component protects against abrasion and impact, prolonging the machine’s lifespan. This is necessary due to the high stresses present during the operation of the heavy machinery.