high-frequency induction surface hardening
Objective: Partial treatment to obtain high surface hardness combined with good core toughness.
The treatment consists of rapidly heating the surface zone of the part to austenitizing temperature, then subjecting it to vigorous cooling to achieve martensitic transformation of the austenitized part.
Heating is achieved by placing the workpiece in the field of an inductor through which a high-frequency alternating current (50 to 400 kHz) flows. Heat is generated by magnetic hysteresis losses and the Joule effect of induced currents.
Quenching is generally performed "on the fly", with a "follower shower" distributing the quenching liquid. It can also be carried out "statically" with immersion cooling of the part.
The depth affected depends on numerous parameters (material, frequency, power, heating time, quenching performance, part geometry, etc.).
The treatment is fine-tuned by successive trials, and therefore requires a great deal of experience. The settings are then automatically checked in industrial production.
Depending on parameters and part geometry, it is possible to produce :
- Partial, localized treatments by limiting heating to the area to be treated.
- Annealing treatments, income.
- Core treatments (special applications).
Our high-frequency induction hardening treatments are available on the Trempelec site for small parts and large production runs.
For study and order
Information to be communicated :
- Material (standardized name)
- Drawing of the part specifying the areas to be treated
- Treatment specifications (surface hardness, depth, connection profile if applicable) and particular inspection specifications. It should be noted that a certain number of parts (to be defined) must be cut for fine-tuning and depth control.
- Number of parts per series, and monthly or annual total.
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Our FAQs
Vacuum deposition is a surface treatment used to deposit a material or alloy on a mechanical part.
The use of vacuum technology ensures a perfectly clean, non-polluting process.
It is not subject to REACH legislation.
This process greatly increases resistance to wear, abrasion, friction and corrosion. As a result, component life is greatly extended.
Standard thicknesses are of the order of 3µm and deposition is carried out on finished parts.
PVD is physical vapor deposition. The element to be deposited is obtained by evaporation or sputtering via a physical process. PACVD is plasma-assisted chemical vapor deposition. The element to be deposited is obtained from chemical reactions. Plasma enables this chemical reaction to take place at lower temperatures.
Vacuum deposits are classified into several categories: anti-wear, friction, decorative and biocompatibility. The applications are therefore very varied: automotive components, aerospace, tooling, cutting tools, medical devices, decorative parts...
The deposition method depends above all on the nature of the coating to be deposited and the substrate.
If the substrate cannot be heated to high temperature, the deposition must be carried out using low-temperature technology.
If the coating to be deposited consists of a solid element (metal or graphite target), a physical process such as PVD is used. If the coating consists of a gas or liquid, a chemical process such as CVD or PACVD is used.
Incorporate carbon below the surface of the steel part to improve fatigue and wear resistance on the surface, while maintaining good core mechanical properties.
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