Method and device for accelerating powder method boronisation by alternating-current filed

A technology of alternating electric field and powder method, which is applied in the field of chemical heat treatment on the surface of metal parts. It can solve the problems of low utilization rate of boron supply agent, increase the difficulty of cleaning parts after infiltration, and affect the surface quality of parts. Simplicity and the effect of improving utilization rate
CN102168243AInactive Publication Date: 2011-08-31CHANGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGZHOU UNIV
Publication Date
2011-08-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method and a device for accelerating powder method boronisation by an alternating-current filed and used for strengthening the surface of a metal part. Two parallel plate-shaped electrodes are placed in powdered boronizing agent and by leads, the two electrodes are respectively connected on a 50Hz alternating current power supply of which the voltage is continuously adjustable within the range of 0-250V; a treated part is positioned between the two electrodes; the electrodes and the part are sealed together with the boronizing agent in a boronisation box and placed in a heat treatment furnace to heat; after the temperature of the furnace achieves a set value, appropriate alternating voltage is applied between the two electrodes; and then the rapid boronisation of the part can be realized. Compared with the existing method, the method of the invention has the advantages that the boronisation can be accelerated by at least 0.3-3 times and the usage amount of the boronizing agent is reduced by above 70%. Therefore, the method and the device can accelerate the powder method boronisation of the metal part, improve the utilization rate of the boronizing agent, lower the temperature of boronisation and reduce deformation of the part.
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Description

technical field

[0001] The invention belongs to a method and a device for chemical heat treatment on the surface of a metal part, in particular to a method and a device for boronizing by an AC electric field accelerated powder method for strengthening the surface of a metal part. Background technique

[0002] Boronizing is a chemical heat treatment process that infiltrates boron into the surface of metal workpieces. The boronizing layer has high hardness and wear resistance, as well as certain high-temperature oxidation resistance and corrosion resistance, so boronizing parts have a wide range of applications. Boronizing can be divided into solid, salt bath, electrolytic and vapor phase boronizing methods.

[0003] At present, the most widely used solid powder method boronizing (referred to as powder method boronizing) is generally high-temperature boronizing at 850-950°C according to the performance requirements of the parts and the material of the parts. The commonly used...

Claims

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