Hardening and tempering

In contrast to case hardening, hardening and tempering is a hardening process that permeates the entire component. Steels which are hardened and tempered have a higher set content of carbon and alloy and therefore ideally harden all the way to the core.

The hardening process includes heating to what is known as the austenitizing temperature, followed by quenching according to the component requirements. The austenitizing temperatures range between 800 °C and 1,000 °C depending on the composition of the steel. Following hardening, the material being treated is adapted to the desired surface hardness in a subsequent, second heat treatment at a maximum of 350 °C. This is referred to as tempering or relaxing.

Steels with a low to moderate alloy content of up to 5% can be hardened in RENK’s hardening shop.

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Hardening shop

Case hardening

Hardening refers to the sub-process in which the material being treated is quenched in oil or under gas following carburization.

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Hardening shop

Annealing

Annealing processes are intensive heat treatments. The goal is to obtain specific material properties that are suitable for subsequent processing steps.

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Hardening shop

Quenching

Heat treatment consists of raising the austenitizing temperature followed by quenching that is appropriate for the material and the required properties.

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Hardening shop

Material testing

Whether you're selecting materials, designing workpieces, or assessing damage – our experts are here to provide you advice and support.

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Relevant areas of expertise

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Surface coating

RENK has many years of in-depth experience in the area of surface coatings for gear unit parts and drive components which are subject to exceptional conditions.

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Gear technology

Optimized design and production of gears at RENK. Ideal operating characteristics and a high degree of reliability.

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Areas of expertise

Heat treatment

Heat treatment from RENK. Thorough and reliable heat treatment for gear unit parts and drive components.

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