Expansion loops for heating elements in vacuum furnaces

Details Expansion loops for heating elements in vacuum furnaces Expansion loops for heating elements in vacuum furnaces

H - Electricity

05

B

H05B 3/62 (2006.01) F27D 11/00 (2006.01) H05B 3/64 (2006.01)

Patent

CA 2354290

A heating element for a vacuum heat treating furnace, a hot zone for a vacuum heat treating furnace, and a vacuum furnace are disclosed. The heating element includes a first heating element portion formed of a thin form of conductive, refractory metal or alloy, and an expansion loop formed in or attached to the first heating element portion, to absorb expansive and contractive forces on the element due to thermal cycling. The heating elements are disposed around the interior surface of the hot zone, which includes a sidewall formed of thermally insulating material. The vacuum heat treating furnace includes a pressure vessel and a hot zone disposed within the pressure vessel.

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