Applications- Tempering

R&D, design, production and quality control consolidated with many years of outstanding experience. You can find our products everywhere heat treatment takes place.

Tempering

Tempering

The furnaces of the model series AK with useful chamber size 30 – 600 liters with max. temperature of 950 °C are equipped with a strong circulation blower. Due to the circulation blower a fast warming an uniform temperature distribution is reached. AK furnaces of LHT are used for annealing, tempering and glowing. Special sizes up to several cubic meters of useful chamber are possible. The optional gas purging and housing of the outer insulation layers enable an extensive elimination of a scaling.

For sensitive materials the annealing and tempering is carried out in protective gas furnaces.

Therefore LHT protective gas furnaces of the model series VMK-S, useful chamber 2,6 – 15 liters and KS-S, useful chamber 70 – 460 liters are suitable. In both model series you can work up to temperatures above 1050 °C with protective gas. Mainly it is held under forming gas with hydrogen content < 5 % and with oxidation-sensitive building components with 100 % hydrogen or cracked gas. For latter the furnaces will be equipped with standard options gassing unit, burning-off device and safety package.

The optimization of production lines it is often necessary to work in continuous furnaces. Linn manufactures therefore small and medium size continuous belt furnaces up to 1150 °C.

The furnaces of the model series HK with useful chamber size 30 – 600 liters with max. temperatures of 1200 °C (optionally 1300 °C for high speed steels) are used for hardening, normalizing and other heat treatments. Special sizes up to several cubic meters of useful chamber are possible. The optional gas purging and housing of the outer insulation layers enable an extensive elimination of a scaling.

For the inductive hardening Linn produces high and middle frequency generators. The standard power range for the high frequency units are between 1.2 – 10 kW, special designs up to 100 kW. Middle frequency generators are built as standard units from 10 kW to 200 kW and max. up to 1000 kW. Inductors and quenching showers are also manufactured by LHT.

Automated units e. g. for hardening of waves is also included in the delivery program of LHT.

Type series

AHK-model

Chamber furnace for hardening and annealing, brick and ASW insulation, Tmax 1200 °C, 40 - 600 l

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AK-model

Chamber furnace for annealing, brick and ASW insulation, Tmax 800 °C, 22 - 603 l

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FRH/FRV-model

Tube furnace, high temperature, gas and/or vacuum tight, Ø 25 - 150 mm, heated length 150 - 1000 mm, Tmax 1800 °C

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HK-model

Chamber furnace for hardening, brick and ASW insulation, Tmax 1300 °C, 31 - 600 l

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HTG-N-model

High frequency generator, 1,2 - 10 kW, 150 - 400 kHz

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KK-H-model

Shuttle kiln, brick and ASW insulation, Tmax 1340 °C, 1050 - 2750 l

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KK-U-model

Air circulation chamber furnace, brick and ASW insulation, Tmax 850 °C, 44 - 350 l

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KS-S-model

Chamber furnace, brick and ASW insulation, gas tight muffle, Tmax 1200 °C, 69 - 462 l

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KS-Vac-model

Chamber furnace, brick and PCW insulation, vacuum tight muffle, Tmax 1200 °C, 61 - 436 l

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LM-model

Laboratory chamber furnace, ASW insulation, Tmax 1340°C, 1,5 - 18,4 l

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MFG-model

Medium frequency generator, 10kW - 1MW, 5 - 100 kHz

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VMK-high temperature-model

Laboratory chamber furnace, high temperature, PCW insulation, Tmax 1800 °C, 6.9 - 12 l

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VMK-model

Laboratory chamber furnace, ASW insulation, Tmax 1200 °C, 1 - 25 l

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VMK-S-model

Laboratory chamber furnace, ASW insulation, gas tight muffle, 2.6 - 15 l, Tmax 1050 °C

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VMK-Vac-model

Laboratory chamber furnace, ASW insulation, gas and vacuum tight, 2 - 12 l, Tmax 1050 °C

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Special products

FAU-4-350/80/3300/600

Continuous belt furnace, brick and ASW insulation, Tmax 600°C, 43 kW, 92 l

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FAU-5-750/200/15000/680

Continuous belt furnace, annealing lehr, ASW insulation, Tmax 680°C, 112 kW, 375 l

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FRH-3-150/1000/1250 Bifilar

Tube furnace, bifilar, ASW insulation, Ø 150 mm, heated length 1000 mm, Tmax 1250 °C, 10 kW

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FRH-3-200/2000/1250

Double tube push-trough furnace, ASW insulation, Ø 73 mm, heated length 2000 mm, tmax 1250 °C, 38 kW

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FRH-3-250/1750/850

Tube furnace, ASW insulation, gas tight, Ø 250 mm, heated length 1750 mm, Tmax 850 °C, 35 kW

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