Preparation method of boronizing agent for carbon steel

Abstract

The invention relates to a preparation method of a boronizing agent for carbon steel. The preparation method comprises: proportioning the following materials in percentage by weight: 25% of borax, 8% of sodium fluoroborate, 22% of clay, 7% of urea, 6% of ferrosilicon, 4% of ammonium bicarbonate, 2% of azoamide, 1.0% of aluminum, 0.25% of calcium carbonate, 0.3% of manganese dioxide, 0.1% of sodium bicarbonate, 0.002% of titanium dioxide, 0.3% of rare earth fluoride, and the balance of graphite and charcoal; grinding such materials into powders by a grinder and mixing the powders, adding water accounting for 25% of an overall weight while mixing the materials, next, processing the mixture into granules having an average granule size of 3-4 mm using a granulator, and drying the granules in a 150 DEG C drying oven after natural drying, thereby obtaining the boronizing agent. By means of the technical scheme of the invention, the usage amount of rare earths is reduced, and the boronizing effect is enhanced.

Description

technical field [0001] The invention belongs to the field of alloy steel heat treatment, in particular to a method for preparing a boronizing agent for carbon steel. Background technique [0002] For some metal workpieces, in order to improve their performance, it is necessary to carry out chemical heat treatment on metal workpieces, especially for some workpieces that require high surface hardness, wear resistance, and impact resistance, boronizing treatment is generally used to utilize boron. It can increase the wear resistance of the alloy, where a boronizing agent is required. [0003] The boronizing agent used in the current technology has a shallow boronizing layer, the maximum of which is not more than 0.15 mm, and the boundary between the boronizing layer and the substrate is obvious, which easily leads to peeling off of the boronizing layer on the surface. On the other hand, currently used boronizing agents use noble metals and rare earth metals, resulting in high ...

AI Technical Summary

Problems solved by technology

[0003] The boronizing layer of the boriding agent used in the current technology is shallow, the maximum is not more than 0.15mm, and the boundary between the boronizing layer and the substrate is obvious, which easily leads to the peeling of the boronizing layer on the surface

On the other hand, the currently used boronizing agents use precious metals and rare earth metals, resulting in high cost of boronizing agents