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A method for rapid boronizing of q235 steel

A boronizing and rapid technology, applied in the direction of coating, metal material coating process, solid-state diffusion coating, etc., can solve the problems of long time, difficult to obtain single-phase Fe, high temperature, etc., achieve good hardness gradient and shorten boronizing The effect of time and high density

Inactive Publication Date: 2017-02-22
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for rapid boronizing of Q235 steel, which solves the problems of high temperature, long time and difficulty in obtaining single-phase Fe in the boronizing method in the prior art. 2 Technical issues of organization B

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  • A method for rapid boronizing of q235 steel
  • A method for rapid boronizing of q235 steel
  • A method for rapid boronizing of q235 steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The Q235 steel is subjected to single-sided surface shot peening with supersonic particle bombardment technology. The process is: working air pressure 0.5MPa, S110 stainless steel projectiles with a diameter of 0.3mm, and the bombardment time is 30min, so that the structure of the shot peening surface is refined to nanometers. level; then the Q235 steel after shot blasting is cleaned with acetone in an ultrasonic cleaner to keep the surface of the Q235 steel sample clean;

[0055] In mass fraction, take by weighing 10% diboron trioxide, 10% ammonium bicarbonate, 10% cerium oxide, 15% active carbon, 55% silicon carbide and mix uniformly to prepare powder boronizing agent, and Dry the powder boronizing agent at 100°C for 1h; dry the boronizing sealed pot at 100°C for 1h, bury Q235 steel in the boronizing sealed tank containing the above powder boronizing agent, and put it in the muffle furnace Heat to 550°C, hold for 2 hours, then heat up to 800°C with the furnace and con...

Embodiment 2

[0058] The Q235 steel is subjected to single-sided surface shot peening with supersonic particle bombardment technology. The process is: working air pressure 0.5MPa, S110 stainless steel projectiles with a diameter of 0.3mm, and the bombardment time is 30min, so that the structure of the shot peening surface is refined to nanometers. level; then the Q235 steel after shot blasting is cleaned with acetone in an ultrasonic cleaner to keep the surface of the Q235 steel sample clean;

[0059] In terms of mass fraction, weigh 12% ferroboron, 13% potassium fluoride, 8% cerium oxide, 20% activated carbon, and 47% silicon carbide and mix uniformly to prepare a powder boronizing agent, and the powder Dry the boronizing agent at 100°C for 1h; dry the boronizing sealed pot at 100°C for 1.5h, bury the Q235 steel in the boronizing sealed pot containing the above powder boronizing agent, and heat it in a muffle furnace Heat to 580°C, hold for 1.5h, then heat up to 900°C with the furnace and ...

Embodiment 3

[0062] The Q235 steel is subjected to single-sided surface shot peening with supersonic particle bombardment technology. The process is: working air pressure 0.5MPa, S110 stainless steel projectiles with a diameter of 0.3mm, and the bombardment time is 30min, so that the structure of the shot peening surface is refined to nanometers. level; then the Q235 steel after shot blasting is cleaned with acetone in an ultrasonic cleaner to keep the surface of the Q235 steel sample clean;

[0063] In mass fraction, take by weighing 15% boron carbide, 15% sodium fluorosilicate, 12% cerium oxide, 18% active carbon, 40% silicon carbide and mix uniformly to prepare powder boronizing agent, and Dry the powder boronizing agent at 100°C for 1h; dry the boronizing sealed pot at 100°C for 1.2h, bury the Q235 steel in the boronizing sealed tank containing the above powder boronizing agent, and put it in the muffle furnace After heat preservation at 600°C for 2 hours, the furnace temperature was r...

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Abstract

The invention discloses a method for rapidly boriding Q235 steel. The method comprises the following steps: firstly, carrying out shot blasting treatment on a single surface of Q235 steel by adopting a supersonic fine particle bombarding technology, so that the texture of a shot blasting surface is refined to nanoscale; and carrying out boriding treatment on the Q235 steel in a sealed boriding tank by adopting a powder boronizing agent which is prepared from 10%-15% of a boron supplying agent, 10%-15% of a boronizing activator, 8%-12% of cerium oxide, 15%-25% of activated carbon and 40%-55% of silicon carbide. By adopting the method in which shot blasting nanocrystallization on a work-piece surface and then boriding by using a rapid boronizing agent are combined, so that the boriding temperature is lowered, the boriding time is shortened; a relatively deep boriding layer is obtained under the same boriding process condition; the obtained boriding layer is a Fe2B single-phase boride with high compactness and good performance; and the targets of saving energy, reducing emission and reducing cost are achieved.

Description

technical field [0001] The invention belongs to the technical field of material modification, and in particular relates to a method for rapid boronizing of Q235 steel. Background technique [0002] The boronizing process can be divided into solid method, liquid method, gas method, ion method, etc. At present, the solid boronizing method is widely used at home and abroad, especially the powder boronizing method, which has the advantages of no special equipment, simple process, easy implementation, and After the workpiece does not need to be cleaned, the reusability of the infiltrating agent is good, and the iron and steel workpiece can be boronized. The workpiece can obtain a high-hardness boride layer after boronizing with the powder boronizing method, and the thickness and structure of the infiltrating layer are easy to control. Therefore, it is a boronizing method with low cost, low investment and quick effect, and it is also a relatively cheap heat treatment method to obt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/70C23C8/02
CPCC23C8/02C23C8/70
Inventor 葛利玲
Owner XIAN UNIV OF TECH
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