Low-temperature pack boronizing steel part surface-strengthening treatment device and method

Abstract

The invention discloses a low-temperature pack boronizing steel part surface-strengthening treatment device and a method. The device comprises a barrel-shaped boronizing tank, and an internal cover is matched with the boronizing tank; an asbestos board and an external cover are sequentially fitted on a fixed flange arranged on the upper end of the boronizing tank, and at least three fixing holders are evenly arranged along the circumference of the boronizing tank between the external cover and the fixed flange. When the device is in used, pack boronizing agent and a workpiece are loaded into the device, and the internal cover is closed; sodium silicate mastic is prepared and applied on the circumference of the joint surface between the edge of the internal cover and the inner wall of the boronizing tank for sealing; and the asbestos board and the external cover are sequentially closed, and are tightly fixed by the fixing holders. The invention is implemented by adopting the internal cover and external cover sealing method, the sodium silicate mastic is adopted to seal the internal cover, the thick asbestos board is clamped between the external cover and a furnace shell, moreover, a plurality of evenly distributed fixing holders are used for sealing, and thereby the sealing property of the low-temperature pack boronizing steel part surface-strengthening treatment device is effectively enhanced.

Description

technical field [0001] The invention relates to a thermal processing device and method, in particular to a thermal processing device and method. Background technique [0002] Boronizing is a chemical heat treatment method for steel products, the main purpose of which is to improve the hardness, wear resistance and corrosion resistance of the surface. There are many methods of boronizing, including solid powder boronizing, gas boronizing, paste boronizing, salt bath boronizing and plasma boronizing, etc. Among them, solid boronizing has the advantages of convenient process operation, simple equipment use, and easy quality control. It is widely used in production. The boronizing process is to mix the boron supply agent, activator, and filler evenly, then put the workpiece into the infiltration box, seal it, heat it to a certain temperature and keep it for a certain time, and then perform furnace cooling or air cooling. [0003] However, boronizing is carried out at high temp...

AI Technical Summary

Problems solved by technology

[0004] Due to the low activity and concentration of boron atoms at low temperature, the boronizing device has particularly high requirements on sealing performance. Once the sealing performance of the device is not good, it will directly affect the concentration of boron atoms in the boronizing environment in the device and reduce the boronizing effect.

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