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Paste boriding agent as well as preparation method and application thereof

A boronizing agent and paste-like technology, which is applied in the direction of coating, metal material coating process, solid-state diffusion coating, etc., can solve the problems of easy peeling of boronizing layer and parts failure, and achieve the elimination of softening phenomenon in the transition zone and reduce the cost Low, the effect of microhardness improvement

Pending Publication Date: 2022-07-05
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current boronizing process generally has the problem of softening of the transition zone (the area between the boronizing layer and the base metal), which makes the boronizing layer easy to peel off under the action of external force, resulting in failure of parts

Method used

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  • Paste boriding agent as well as preparation method and application thereof
  • Paste boriding agent as well as preparation method and application thereof
  • Paste boriding agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Put 0.5kg of boron carbide with a particle size of 200 objects, 0.3kg of potassium fluoroborate with a particle size of 230 objects, 0.08kg of ceria with a particle size of 300 objects, and 0.12kg of silicon carbide with a particle size of 200 objects into the ball mill tank, and then put the total weight of 1kg zirconia grinding balls with a diameter of 15mm were placed on a pot mill for mixing treatment. The mixing time was 24h, so that the components in the boronizing agent were mixed evenly; the weight percent was added to the evenly mixed boronizing agent. It is a 5% polyvinyl alcohol aqueous solution to make a paste boronizing agent; 410 stainless steel plates are polished step by step on 80#, 200#, 400#, 600#, 1000# water-resistant sandpaper, and the polished surfaces are all fine When there are small scratches in the same direction, ultrasonically clean with acetone for 5 minutes before use; apply a 5mm thick paste boronizing agent on the surface of the 410 stain...

Embodiment 2

[0032] Put 0.5kg of boron carbide with a particle size of 200 objects, 0.2kg of potassium fluoroborate with a particle size of 230 objects, 0.06kg of ceria with a particle size of 400 objects, and 0.24kg of silicon carbide with a particle size of 400 objects into the ball mill tank, and then put the total weight of 1kg zirconia grinding balls with a diameter of 15mm were placed on a pot mill for mixing treatment. The mixing time was 24h, so that the components in the boronizing agent were mixed evenly; the weight percent was added to the evenly mixed boronizing agent. It is a 10% polyvinyl alcohol aqueous solution to make a paste boronizing agent; the Q235A carbon structural steel plate is polished step by step on 80#, 200#, 400#, 600#, 1000# water-resistant sandpaper. When the scratches are small and in the same direction, use acetone to ultrasonically clean for 5 minutes; apply a 7mm thick paste boronizing agent on the surface of the Q235A carbon structural steel plate, put i...

Embodiment 3

[0035]Put 0.3kg of boron carbide with a particle size of 300 objects, 0.2kg of potassium fluoroborate with a particle size of 300 objects, 0.1kg of ceria with a particle size of 400 objects, and 0.4kg of silicon carbide with a particle size of 200 objects into the ball mill tank, and then put the total weight of 1kg of zirconia grinding balls with a diameter of 15mm were placed on a pot mill for mixing treatment. The mixing time was 24h, so that the components in the boronizing agent were mixed evenly; the weight percent was added to the evenly mixed boronizing agent. It is an 8% polyvinyl alcohol aqueous solution to make a paste boronizing agent; the 9SiCr low alloy tool steel plate is polished step by step on 80#, 200#, 400#, 600#, 1000# water-resistant sandpaper. For small scratches with the same direction, use acetone to ultrasonically clean for 5 minutes; apply a 7mm thick paste boronizing agent on the surface of the 9SiCr low alloy tool steel plate, put it in a heat treat...

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Abstract

The invention discloses a paste boronizing agent and a preparation method and application thereof, the paste boronizing agent comprises, by mass, 30%-50% of boron carbide (B4C), 20%-40% of potassium fluoborate, 6%-10% of cerium dioxide and the balance silicon carbide, and the total mass percentage is 100%. According to the paste boronizing agent, the strength and hardness of a transition area of a boronizing layer can be remarkably improved, and compared with a thermal spraying coating, the microhardness of the boronizing layer is improved by 20%-60%. And the preparation method is low in cost, simple in process and convenient for large-scale engineering application, and particularly, directional precise boriding can be carried out on the specific part of the part, a local area is strengthened, and customized production of a product is realized.

Description

technical field [0001] The invention relates to a paste boronizing agent for strengthening the transition zone of the boronizing layer of industrial steel and a preparation method and application thereof. Background technique [0002] As an important surface strengthening technology, boronizing can endow the workpiece with extremely high hardness, wear resistance, corrosion resistance and fatigue strength, and has been widely used in marine engineering, petrochemical, automobile manufacturing and other industrial sectors. However, the current boronizing process generally has the problem of softening in the transition zone (the area between the boronizing layer and the base metal), which makes the boronizing layer easy to peel off under the action of external force, resulting in the failure of the part. In order to solve the problem of softening in the transition zone, the present invention adds rare earth elements into the self-made paste boronizing agent to perform boronizi...

Claims

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Application Information

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IPC IPC(8): C23C8/70
CPCC23C8/70
Inventor 杨志东张正栋石铭霄陈书锦陈云涛顾小燕
Owner JIANGSU UNIV OF SCI & TECH
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