Applications- Annealing

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

Annealing

Annealing

The furnaces of the model series AK with useful chamber size 30 – 600 liters as well as KK-U with useful chamber size 40 - 350 liters with max. temperatures of 950 °C are equipped with a strong circulation blower. Due to the circulation blower a fast warming a uniform temperature distribution is reached. AK and KK-U furnaces of LHT are used for annealing, tempering and glowing. Special sizes up to several cubic meters of useful chamber are possible. Especially smaller sizes like AK 30 and AK 40 are used for annealing of additive manufactured parts by 3-D printers. 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.

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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FBV/GBV-model

Chamber furnace, bottom loader, PCW-insulation, high temperature, gastight, Tmax 2400 °C, 2-1000 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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KKV- / KKH-model

Cold wall furnaces with metallic heater and metallic shield insulation package, gas and vacuum tight, Ø100 – 1000 mm, heated length 100 – 1000 mm, Tmax 2800 °C

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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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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-3-200/2000/1250

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

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FRH-3-450/650/1050

Tube furnace, ASW insulation, high temperature, gas and vacuum tight, Ø 450, heated length 750 mm, Tmax 1050 °C, 24 kW

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FRH-4-200/2000/1250

Tube furnace, ASW insulation, gas tight, Ø 134 mm, heated length 2000 mm, Tmax 1300 °C, 38 kW

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FWU-3-2200/1500/5500/700

Shuttle kiln, air circulation, ASW insulation, Tmax 700 °C, 282 kW, 18,2 m³

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KF-3-240-S

Chamber furnace, insulation made of ASW, 3-zone, gas tight muffle, Tmax 1200 °C, 245 l, 58 KW

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KH-64-S

Clean room chamber furnace, gastight, Tmax 260 °C, 64 l, 5kW

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KK-DH-1000-Special

Rotary hearth furnace, 2 decks, Tmax 1100°C, brick insulation, 1 m³

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