Nitriding furnace with magnetic field auxiliary mechanism

Abstract

The invention relates to a nitriding furnace with a magnetic field auxiliary mechanism. The nitriding furnace with the magnetic field auxiliary mechanism is mainly characterized in that connecting pieces are arranged on two opposite sides in a furnace shell and are each provided with a flat plate-shaped magnet frame; the two flat plate-shaped magnet frames are parallel to a center line of a side through hole of the furnace shell; an upper horizontal strip-shaped baffle plate, a middle horizontal strip-shaped baffle plate and a lower horizontal strip-shaped baffle plate are arranged on each magnet frame and are connected with the magnet frames through fastening pieces; two electromagnets arranged in parallel to form a group and provided with iron blocks in coils are clamped between each baffle plate and the corresponding magnet frame; two guide wires of each group of electromagnet coils are connected with a binding post arranged on a side furnace cover; and the upper groups of electromagnets, the middle groups of electromagnets and the lower groups of electromagnets on two sides of the furnace shell are symmetrically arranged. According to the nitriding furnace with the magnetic field auxiliary mechanism provided by the invention, the workpiece nitriding speed can be accelerated, the nitriding time is short, a nitriding cycle is greatly reduced, the process cost is reduced, theworkpiece deformation is reduced, the quality of a nitriding layer is improved, the nitrogen-containing concentration of the nitriding layer of a workpiece is increased, the fragility of the nitridinglayer is eliminated, and a mechanical property of a surface layer is improved; and the nitriding furnace with the magnetic field auxiliary mechanism is advanced and reasonable in structure, convenient to operate, reliable to operate, and durable in use.

Description

technical field [0001] The invention relates to a nitriding equipment. Background technique [0002] Nitriding is a chemical heat treatment process that infiltrates nitrogen into the surface of the workpiece to form a nitrogen-enriched hardened layer. Nitriding will improve the hardness, wear resistance and corrosion resistance of the workpiece surface. Nitriding treatment is used as the final process for many precision parts, such as the journals of precision machine tool spindles, the journals and cylinder liners of aeroengine crankshafts, etc. A general nitriding furnace consists of a furnace body, a vacuum system, a gas supply system, a temperature measurement system and a control system. However, the nitriding process cycle is long, which makes the nitriding efficiency very low, and the ordinary nitriding surface layer is prone to brittleness. Therefore, some methods have been developed to overcome this shortcoming, such as magnetic field nitriding, induction heating...

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Problems solved by technology

[0003] At the same time, the gas nitriding furnace currently used in China generally has a disadvantage that the nitriding atmosphere pressure in the tank is low, and the atmosphere pressure is not high, which greatly affects the nitriding speed and quality.

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