Energy saving and rapid ion nitriding technology for alloy steel worm

An ion nitriding and alloy steel technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of low efficiency, long time, high power consumption, etc. The effect of saving ammonia

Inactive Publication Date: 2018-11-02
TSUBAKI EMERSON GEAR TIANJIN
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  • Description
  • Claims
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Problems solved by technology

Among them, it usually takes up to 24 hours in the nitriding and heat preservation stage, which consumes a lot of power, takes a long time, and is inefficient

Method used

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  • Energy saving and rapid ion nitriding technology for alloy steel worm

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Embodiment Construction

[0019] The following will be described in detail in conjunction with the embodiments of the present invention with reference to the accompanying drawings.

[0020] The energy-saving and fast ion nitriding process of alloy steel worm includes the following steps:

[0021] Step 1: Clean the alloy steel worm workpiece with an ultrasonic cleaning machine to remove the oil stain on the surface of the alloy steel worm workpiece; put the alloy steel worm workpiece into the nitriding furnace;

[0022] The second step: use the alloy steel worm workpiece as the cathode, and the furnace wall as the anode, and vacuumize the nitriding furnace to below 150Pa;

[0023] Step 3: Connect the bipolar direct current of the nitriding furnace, and under the conditions of 150Pa and voltage 500-600V, arc the alloy steel worm workpiece by plasma bombardment; , oxides are removed, and thus purified;

[0024] Step 4: After arcing, gradually increase the current between the two poles (according to the ...

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Abstract

The invention provides an energy saving and rapid ion nitriding technology for an alloy steel worm. The technology includes the steps of: first, conducting ultrasonic cleaning on an alloy steel worm workpiece to remove oil stain from the surface of the alloy steel worm workpiece; second, loading the workpiece into an ion nitriding furnace, and then pumping the ion nitriding furnace into a vacuum state; third, powering on the ion nitriding furnace, conducting vacuum pumping to make the furnace pressure lower than 150Pa, introducing 500-600V direct current voltage for arc striking, and performing plasma bombardment on the workpiece surface to remove surface oil stain; fourth, conducting heating to 350DEG C; fifth, introducing a certain amount of air, and performing heat preservation for 2h;sixth, introducing ammonia gas for ion nitriding on the workpiece surface; and seventh, conducting cooling. The technology provided by the invention can save the overall nitriding time by 6h, and shorten the time by 20%, and saves 20%-25% of electric energy and ammonia gas.

Description

technical field [0001] The invention relates to the field of ion nitriding, in particular to an energy-saving and rapid ion nitriding process for an alloy steel worm. Background technique [0002] Ion nitriding is a chemical heat treatment method for nitriding by glow discharge caused by a high-voltage electric field in a dilute nitrogen-containing gas. It is a special ion nitriding furnace, in a low vacuum state, the workpiece is used as the cathode and the furnace wall is used as the anode to connect high-voltage direct current, so that the gas in the furnace is transformed into a plasma state, and the nitrogen-containing plasma continuously bombards the surface of the workpiece to make it Heating, at the same time, some nitrogen atoms penetrate into the surface of the workpiece to achieve the effect of nitriding. [0003] A worm refers to a gear that has one or several helical teeth and meshes with a worm wheel to form a cross-axis gear pair. The indexing surface can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/38C23C8/26
CPCC23C8/38C23C8/26
Inventor 赵文韬
Owner TSUBAKI EMERSON GEAR TIANJIN
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