HTR GMBH
HARDENING TECHNOLOGY
At our subsidiary HTR, state-of-the-art hardening processes are at the heart of our work. Through targeted heat treatment, we change the properties of metals to make them more resistant, durable and resilient. Whether case hardening, inductive hardening, tempering or annealing - each process is tailored precisely to the requirements of our customers. In this way, we guarantee the highest quality, dimensional accuracy and process reliability for a wide range of industries and applications.
HARDENING
Protective gas hardening
HTR uses state-of-the-art heating and hardening processes to optimize the material properties of your components - for maximum resilience and durability.
induction hardening
In induction hardening, the areas to be hardened are heated using an induction current and then quenched with a water spray if necessary.
vacuum hardening
In vacuum hardening, your component is heated in a vacuum and then quenched using nitrogen under pressure. As a rule, high-alloy materials are vacuum-hardened.
NITRIDING
Plasma nitriding
In plasma nitriding, the surface layer of a workpiece is enriched with nitrogen in an ionized gas atmosphere. This results in clean component surfaces with significantly improved resistance to abrasion and wear.
gas nitriding
In gas nitriding, nitrogen is released from ammonia; at temperatures between 500°C and 600°C, this nitrogen penetrates the surface of the component, where it forms a wear-resistant nitride layer.
Salt bath nitriding
In salt bath nitriding, the parts to be treated are immersed in a nitriding bath to increase their surface hardness and are then oxidized in a quenching bath.
FREEZING
Deep freezing
During deep-freezing, the steel is cooled to a temperature of -70°C to -150°C after hardening, which causes the retained austenite to be transformed into martensite.
GLOWING
Stress-relief annealing
Stress-relief annealing reduces internal stresses in the microstructure of metal components, thereby minimizing the risk of undesirable dimensional and geometric changes during subsequent machining steps or when the component is put into service.
Soft annealing
In soft annealing, a steel material is typically heated to just below the so-called A1 transformation point in order to achieve low strength and high ductility.
Core competencies
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Hardness expert for 25 years
We have stood for the highest quality in heat treatment for 25 years. Over 1000 companies from a wide range of industries trust in our experience, precision and reliability. Our continuous growth shows: Highest speed and uncompromising quality standards are not mutually exclusive with us.
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HTR BY THE NUMBERS
We stand for expertise, growth, and innovative strength—with strong key figures that underscore our position as a leading provider in the industry.
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Current topics of the HTR
We keep you up to date: Find out more about our latest innovations, ongoing projects and exciting developments relating to hardening processes, digitalization and sustainability. In our blog, we share practical insights, background knowledge and news that are relevant to you and your industry.
