Manufacturer of resistance, induction and microwave heating systems for industrial heat treatment.
Linn High Temp GmbH
92275 Eschenfelden, GermanyNew on Amplifa
About Linn High Temp
Linn High Temp is a manufacturer of resistance, induction and microwave heating systems based in Eschenfelden (Bavaria). Founded in 1969 by Horst Linn sen., the company develops and manufactures furnaces and thermal process systems for applications such as annealing, hardening, tempering, sintering, debinding, calcination, melting, investment casting and crystal growing. The portfolio ranges from laboratory chamber furnaces to protective-gas and vacuum furnaces, high-temperature and high-pressure furnaces (up to 2400 °C, 60–100 bar) and rotary tube furnaces, through to cold-wall induction melting systems for reactive metals such as titanium, tantalum, niobium and molybdenum. For investment casting, vacuum-suitable induction centrifugal casting systems (Supercast, Titancast) are offered; a cooperation with ACCESS e.V. (RWTH Aachen) exists for titanium investment casting. Applications can be found, among others, in the semiconductor industry, ceramics, metallurgy and foundries, medical technology, aerospace, the automotive sector, powder metallurgy (MIM), additive manufacturing, and in the processing of rare earths and of UO2/ThO2. The scope of supply also includes service and training.
- Site
- Eschenfelden
- Processes
- Heat treatment (resistance heating), Induction heating / induction furnaces, Microwave/dielectric heating, Drying (microwave/LHT drying furnaces, Tmax 300°C), Curing of plastic components (3D printing), Annealing / stress-relief annealing / heat treatment of 3D-printed parts (up to 1100°C, protective, Melting / infiltration melting (induction, MFG), Debinding (catalytic per the Catamold process, 110-140°C or thermal up to 1050/1150°C)
- Materials
- Titanium, Titanium-aluminium, Titanium alloys, Tantalum, Niobium, Molybdenum, Zirconium, Zirconium oxide
- Founded
- 1969
- Industries
- Semiconductor industry, Ceramics, Metallurgy/Foundry, Medical technology, Aerospace, Automotive sector
- 01
Design and engineering
- 02
Manufacture of heating systems (resistance, induction, microwave)
- 03
Induction centrifugal investment casting (Supercast/Titancast)
- 04
Heat treatment (annealing, sintering, debinding, calcination)
- 05
Assembly of casting lines
- 06
Service and training
Sites
Eschenfelden
DEHeadquarters, development and manufacturing
- Materials
- Titanium, titanium alloys, refractory metals, steels, ceramics
- Resistance heating systems
- Induction heating systems
- Microwave heating systems
- Laboratory chamber furnaces (VMK-250-Special, VMK-135-S Special)
- Induction furnace IT-GTV-160/200/2500-Vac (Tmax 2500 °C)
- Shaker hearth furnace Vi-30-P
- High-temperature chamber furnace FKH-200/200/200/1250
- Cold-wall bottom-loading furnace KBV-180/250/1250
- Cold-wall induction melting systems
- Induction centrifugal casting systems Supercast/Titancast
- Rotary tube furnaces
- Microwave chamber systems
Components & Systems
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Heat treatment (resistance heating)Heat treatment | – | – | – | – | – |
| Induction heating / induction furnacesHeat treatment | – | – | – | – | Titanium, Titanium alloys, Tantalum, Niobium, Molybdenum, Zirconium oxide, Glass |
| Microwave/dielectric heatingHeat treatment | – | – | – | – | – |
| Drying (microwave/LHT drying furnaces, Tmax 300°C)Heat treatment | – | – | – | – | Plastics, Legumes (bulk material) |
| Curing of plastic components (3D printing)Heat treatment | – | – | – | – | Plastics |
| Annealing / stress-relief annealing / heat treatment of 3D-printed parts (up to 1100°C, protectiveHeat treatment | – | – | – | – | Iron alloys, Stainless steels, Titanium, Aluminium |
| Melting / infiltration melting (induction, MFG)Casting | – | – | – | – | Metals, Cemented carbide, Titanium |
| Debinding (catalytic per the Catamold process, 110-140°C or thermal up to 1050/1150°C)Heat treatment | – | – | – | – | Metal, Cemented carbide, Oxide ceramics, Feedstock (MIM) |
| Sintering of 3D-printed partsHeat treatment | – | – | – | – | Metals, Ceramics, Plastics |
| Burnout of binder (up to 700°C)Heat treatment | – | – | – | – | Feedstock (wax, polyacrylates) |
| Cold-wall crucible induction melting (CWC)Casting | – | – | – | – | Titanium, Titanium alloys, Tantalum, Niobium, Molybdenum, Glass, ZrO2, refractory metals |
| Precision investment casting with induction centrifugal casting (Supercast/Titancast),Casting | 0,1 mm | 300 mm | 40 g – 3,5 kg | – | Titanium, Titanium-aluminium (γ-TiAl), Co/Cr alloys, Steels, Stainless steels, Copper, Magnesium |
| Investment casting (lost-wax process, ceramic moulds)Casting | 0,1 mm | 300 mm | 40 g – 3,5 kg | – | Titanium, Titanium alloys |
| Burnout / pre-degassing of wax moulds (dewaxing, pre-firing furnaces)Heat treatment | – | – | – | – | Wax, Ceramic moulds |
| Annealing / hardening / tempering (various furnaces, Tmax 2400°C)Heat treatment | – | – | – | – | – |
| Calcination (incl. REE oxalates, UO2/ThO2, rotary tube furnaces)Heat treatment | – | – | – | – | Rare earth oxides (RE2O3), Thorium oxide (ThO2), Uranium oxide (UO2), Monazite |
| Drying prior to acid digestion (up to 200°C, monazite processing)Heat treatment | – | – | – | – | Monazite ore |
| Hydrogen-operated processes (Tmax 1050°C, gas-tight muffles)Heat treatment | – | – | – | – | – |
| Sintering in laboratory chamber furnace VMK-135-S (Tmax 1050°C, 9,2 l)Heat treatment | – | – | – | – | Ceramics |
| High-pressure sintering/repressing of cemented carbide (FKH/GKH/Rubistar, Tmax 2400°C, 60-100 bar)Heat treatment | – | – | – | – | Cemented carbide |
| Sample preparation for spectroscopyTesting | – | – | – | – | – |
| Sterilisation (microwave)Heat treatment | – | – | – | – | – |
27 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Resistance heating systems | Linn High Temp | – | – | – | Eschenfelden |
| Induction heating systems | Linn High Temp | – | – | – | Eschenfelden |
| Microwave heating systems | Linn High Temp | – | – | – | Eschenfelden |
| Laboratory chamber furnace | Linn High Temp VMK-250-Special | – | – | 2022 | Eschenfelden |
| Laboratory chamber furnace | Linn High Temp VMK-135-S Special | – | 9,2 l, Tmax 1050°C | 2022 | Eschenfelden |
| Induction furnace | Linn High Temp IT-GTV-160/200/2500-Vac | – | Tmax 2500°C, 4 l | 2022 | Eschenfelden |
| Shaker hearth furnace | Linn High Temp Vi-30-P | – | Tmax 950°C, heated length (not specified) | 2022 | Eschenfelden |
| High-temperature chamber furnace | Linn High Temp FKH-200/200/200/1250 | – | Al2O3-PCW and graphite insulation | 2018 | Eschenfelden |
| Cold-wall bottom-loading furnace | Linn High Temp KBV-180/250/1250 | – | 1250°C / argon, with charging platform | 2017 | Eschenfelden |
| Drying furnace | Linn High Temp LHT | – | Tmax 300°C | – | – |
| Chamber furnace | Linn High Temp HK 30 | – | Tmax 1300°C | – | – |
| Protective-gas/vacuum chamber furnace | Linn High Temp VMK-135-S (VMK-S) | – | Tmax 1050°C | – | – |
| Protective-gas/vacuum chamber furnace | Linn High Temp KS-S 240 (KS-S/Vac) | – | Tmax 1150/1200°C | – | – |
| Circulating-air furnace | Linn High Temp KK-U 75 (KK-U/KK-UL) | – | Tmax 550/850°C | – | – |
| High-temperature furnace | Linn High Temp HT-1600-G-Graphite (HT) | – | Tmax 1600°C (optionally up to 2200°C), protective gas/vacuum | – | – |
| High-pressure furnace | Linn High Temp Rubi-Star 60 (Rubistar/FKH/GKH) | – | Tmax 2400°C, Pmax 60 bar (optionally higher, 60-100 bar) | – | – |
| Gas-tight drying cabinet | Linn High Temp LHT (up to 200°C, catalytic debinding) | – | – | – | – |
| Debinding furnace | Linn High Temp KH | – | up to 400°C | – | – |
| Medium-frequency generator | Linn High Temp MFG | – | – | – | – |
| Tiltable casting automaton | Linn High Temp | – | – | – | – |
| Induction centrifugal casting system | Linn High Temp Supercast | – | Casting weight up to 3,5 kg | – | – |
| Induction centrifugal casting system | Linn High Temp Titancast | – | – | – | – |
| Bench-top induction centrifugal casting unit | Linn High Temp | – | Max. casting weight 40 g | – | – |
| Automatic casting line (S7 control, vacuum induction centrifugal casting) | Linn High Temp | – | Pre-firing furnaces + centrifugal casting + heat treatment furnace combined | – | – |
| Cold-wall crucible melting furnace (laboratory/semi-industrial) | Linn High Temp | – | up to >3000°C | – | Eschenfelden |
| Rotary tube furnace | Linn High Temp | – | Rotation 1-10 min⁻¹ | – | – |
| Microwave chamber system | Linn High Temp | – | 2,45 GHz, e.g. 85 magnetrons at 800 W = 68 kW microwave power | – | – |
Additional services
Reference customers
History
- 1969
Founded by Horst Linn sen.; Linn-High-Temp products have been used worldwide in heat treatment since 1969.
- 2017
Cooperation between SAFED and Linn High Therm announced.
- 2021
Company founder Horst Linn sen. passed away.
- 2023
Renaming of Linn High Therm GmbH to Linn High Temp GmbH; new generation of the Lifumat-M series.