Boriding agent for boriding on metallic titanium surface and boriding technique

A technology of boronizing agent and metal titanium, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of unsatisfactory hardness of boronizing layer, no further curing treatment, easy to fall off, etc., to achieve Recyclable usable period, less fluoride content, good fluidity at high temperature

Active Publication Date: 2012-06-27
江苏奇纳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention patent overcomes the limitation of high temperature and long time of current chemical heat treatment, but the boronized layer is relatively thin, and the boronized layer is only heat-treated without further curing treatment, resulting in The hardness of the boronizing layer is not ideal enough, and it is easy to fall off

Method used

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  • Boriding agent for boriding on metallic titanium surface and boriding technique
  • Boriding agent for boriding on metallic titanium surface and boriding technique
  • Boriding agent for boriding on metallic titanium surface and boriding technique

Examples

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Comparison scheme
Effect test

Embodiment 1

[0039] Boronizing agent composition: 28% Na 2 B 4 o 7 , 20%H 3 BO 3 , 17%B 4 C, 15% KCl, 18% NaCl, 2% KBF 4 .

[0040] Boronizing process: first cut the titanium alloy plate into a profile of 15mm*15mm*3mm (length*width*thickness), then use No. 150 sandpaper to roughly grind and polish the profile, and then use No. 600, No. 800 and No. 1200 Finely grind and polish with sandpaper, and then polish with flannelette. Take the above-mentioned polished profile as a sample, and then process it according to the following steps:

[0041] 1) Weigh each component according to the above boronizing agent formula, place it in a planetary ball mill for 1 hour, pass through a 150-mesh sieve, and dry it at 130°C for later use;

[0042] 2) Pretreatment of the sample surface, including:

[0043] A. Soak the sample in a degreasing solution at 80°C for 10 minutes. The formula of the degreasing solution is: each liter of water contains 15g sodium hydroxide, 22g sodium carbonate, 60g phospho...

Embodiment 2

[0059] Boronizing agent composition: 29% Na 2 B 4 o 7 , 10%H 3 BO 3 , 20%B 4 C, 20% KCl, 20% NaCl, 1% KBF.

[0060] Firstly, wire-cut the metal titanium plate into 15mm*15mm*3mm (length*width*thickness) profile, use No. 150 sandpaper to roughly grind and polish the profile, and then use No. 600, No. 800 and No. 1200 sandpaper to finely grind and polish. Then polish with flannelette, and take the above-mentioned polished profile as the sample. Take 4 samples and number them respectively as sample 1, sample 2, sample 3 and sample 4, then carry out boronizing, the boronizing process repeats embodiment 1, the difference is that the metal titanium material is immersed in the boronizing agent melt liquid 2cm below the surface, keep warm at 950°C for a period of time, in which the holding time of sample 1 is 30min, the holding time of sample 2 is 60min, the holding time of sample 3 is 90min, and the holding time of sample 4 is 120min ; After the heat preservation is over, the ...

Embodiment 3

[0068] Boronizing agent composition: 34% Na 2 B 4 o 7 , 13%H 3 BO 3 , 17%B 4 C, 16% KCl, 17% NaCl, 3% KBF.

[0069] Boronizing process: The sample used in the test is a pure titanium plate, and the size of the titanium plate is 18mm*18mm*5mm (length*width*thickness). First polish with sandpaper, and then polish with flannelette, and process the sample after the above polishing treatment according to the following steps:

[0070] 1) Weigh each component according to the above boronizing agent formula, place it in a planetary ball mill for 2 hours, dry it at 150°C, and set aside;

[0071] 2) Pretreatment of the sample surface, including:

[0072] A. Soak the sample in a degreasing solution at 80°C for 10 minutes. The formula of the degreasing solution is: 13g sodium hydroxide, 25g sodium carbonate, 60g phosphoric acid and 8g sodium silicate per liter of water;

[0073] B. Take out the sample from the degreasing solution, and then put it into the soaking solution for 5 mi...

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Abstract

The invention discloses a boriding agent for boriding on a metallic titanium surface and a preparation method thereof. The boriding agent comprises the following ingredients in mass percent: 20-35% of Na2B4O7, 10-20% of H3BO3, 10-20% of B4C, 15-25% of KCl, 15-25% of NaCl, and 1-5% of KBF4. The boriding technique of the invention comprises the steps of: firstly putting a metallic titanium sample in a boriding agent fused mass with special ingredients, maintaining the temperature for a period to form a boriding layer on the surface of the metallic titanium sample; and then, performing a quenching treatment to cure the boriding layer so as to obtain a thick and uniform boriding layer with high hardness and good bonding force on the surface of the metallic titanium sample, and the fused salt on the surface of the metallic titanium sample is easy to treat. The boriding technique of the invention has the advantages of simple and easy control operation, little boriding agent loss, short operation duration and low energy consumption, so that the boriding technique is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a boronizing agent for boronizing the surface of metal titanium and a boronizing process. Background technique [0002] Metal titanium is a kind of structural material with excellent comprehensive performance. It has high specific strength, good heat resistance and strong corrosion resistance. Therefore, it is widely used in aerospace, petrochemical and atomic power generation and other technical industries. However, titanium metal also has disadvantages that cannot be ignored: such as poor wear resistance, easy to heat and stick, easy to oxidize at high temperature and absorb hydrogen, resulting in reduced plasticity and strength. Corrosion phenomenon. Therefore, the optimization and strengthening of titanium metal surface has become the focus of domestic and foreign scholars' research. Boronizing is an effective surface hardening heat treatment process, becaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/42
Inventor 王红强李庆余黄有国任孟德郑锋华赵欣
Owner 江苏奇纳新材料科技有限公司
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