Vacuum electric annealing furnace

An annealing furnace and vacuum technology, applied in the field of mold steel manufacturing equipment, can solve problems such as increased production costs, expensive oil, unsuitable control of combustion temperature, etc., and achieve the effects of improving sealing and heat preservation performance, reducing heat loss, and prolonging service life

Inactive Publication Date: 2014-04-30
WANSHITAI METAL IND KUNSHAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in related industries, more annealing furnaces are used, and the annealing method is the combustion type. The workpiece is annealed by using oil. This annealing method has the following disadvantages: oil is a relatively expensive fuel, and annealing by combustion will increase production. Cost, at the same time, it does not meet the requirements of the national environmental protection and energy saving, and the combustion temperature is not suitable for control, so it is difficult to grasp the more accurate annealing requirements

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  • Vacuum electric annealing furnace

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Embodiment 1

[0013] Example 1: Such as figure 1 As shown, a vacuum electric annealing furnace includes a frame 1, a furnace body 2 and an annealing chamber 3 arranged in the furnace body, the two ends of the furnace body are open, and a conveying device is arranged therein, and the two ends of the furnace body The opening is provided with an airtight furnace cover 4, and the furnace cover is provided with a vacuuming pipeline 5 and a nitrogen filling pipeline 6, and the described vacuuming pipeline 5 and the nitrogen charging pipeline 6 are distributed and connected with a vacuuming device and a nitrogen filling device, so The annealing chamber 3 is provided with an inner lining of aluminum silicate fiber cotton, and ring-shaped bricks are evenly embedded on the inner lining along its length direction, and resistance wires are installed on the bricks.

[0014] The furnace cover is made of 30mm thick steel plate, and the inner side of the furnace cover is provided with an insulating layer...

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Abstract

The invention discloses a vacuum electric annealing furnace comprising a rack, a furnace body and an annealing cavity arranged in the furnace body, wherein two ends of the furnace body are open; a conveying device is arranged in the furnace body; openings at two ends of the furnace body are respectively provided with a sealing furnace cover; a vacuum pumping pipeline and a nitrogen filling pipeline are arranged on one of the furnace covers and respectively connected with a vacuum pumping device and a nitrogen filling device; an aluminum silicate fiber cotton liner is arranged in the annealing cavity; annular shelf bricks are uniformly embedded and laid on the liner along the length direction; resistance wires are arranged on the shelf bricks. The vacuum electric annealing furnace disclosed by the invention has the advantages that (1) through vacuumizing the airtight furnace cavity and filling the cavity with nitrogen, the annealing quality of die steel is increased and the heat loss in the furnace body is reduced; (2) the structures of the furnace covers are further improved, so that the sealing performance and the heat insulating performance of the furnace are increased and the service life of sealing materials is prolonged.

Description

technical field [0001] The invention relates to a vacuum electric annealing furnace, which belongs to the technical field of mold steel manufacturing equipment. Background technique [0002] Annealing is a metal heat treatment process, which refers to slowly heating the metal to a certain temperature, keeping it for a sufficient time, and then cooling it at an appropriate speed. The purpose is to reduce hardness, improve deep processing performance; eliminate residual stress, stabilize size, reduce deformation and crack tendency; refine grain, adjust structure, and eliminate structure defects. [0003] In the production and processing industry of metal parts, the annealing furnace is a necessary heat treatment furnace, and it is a periodic heat treatment furnace. At present, in related industries, more annealing furnaces are used, and the annealing method is the combustion type. The workpiece is annealed by using oil. This annealing method has the following disadvantages: o...

Claims

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Application Information

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IPC IPC(8): C21D1/26C21D1/773
Inventor 林进光
Owner WANSHITAI METAL IND KUNSHAN
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