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Titanium alloy surface boronizing method

A titanium alloy and boronizing technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the unfavorable high temperature boronizing of titanium alloy, increase the contact area between titanium alloy and oxygen, and increase the looseness of boronizing agent. It is easy to prepare, prevent high temperature oxidation, and reduce pollution.

Inactive Publication Date: 2011-05-11
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The function of the filler is to adjust the boron potential and increase the looseness of the boronizing agent, and the titanium alloy is very easy to react with oxygen at high temperature, and the filler will increase the contact area between the titanium alloy and oxygen, so it is not conducive to the high temperature infiltration of the titanium alloy. boron

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The boronizing agent used is B 4 C powder, particle size ≤ 0.1mm (obtained by grinding with a sealed laboratory crushing sample maker).

[0041]The TC4 (Ti-6Al-4V) titanium alloy plate was wire-cut into a sample of 10mm×10mm×3mm.

[0042] The boronizing agent is used to perform boronizing treatment on the surface of the titanium alloy, and the steps are as follows.

[0043] 1. Titanium alloy surface pretreatment

[0044] ① Degreasing

[0045] Soak the titanium alloy material in a degreasing agent at 70°C for 2 hours; the degreasing agent is Na 2 CO 3 、Na 3 PO 4 12H 2 O, Na 2 SiO 3 and OP-10 emulsifier dissolved in water to obtain the following concentration of aqueous solution:

[0046] Na 2 CO 3 20g / L, Na 3 PO 4 12H 2 O 10g / L, Na 2 SiO 3 10g / L, OP-10 emulsifier 2g / L.

[0047] ②Washing

[0048] Soak the titanium alloy material in hot water at 70°C for 1 hour, and then rinse it twice with deionized water at room temperature.

[0049] ③Surface polish...

Embodiment 2

[0060] The boronizing agent used is B 4 C powder, particle size ≤ 0.1mm (obtained by grinding with a sealed laboratory crushing sample maker).

[0061] The TC4 (Ti-6Al-4V) titanium alloy plate was wire-cut into a sample of 10mm×10mm×3mm.

[0062] The boronizing agent is used to perform boronizing treatment on the surface of the titanium alloy, and the steps are as follows.

[0063] 1. Titanium alloy surface pretreatment

[0064] ① Degreasing

[0065] Soak the titanium alloy material in a degreasing agent at 80°C for 1 hour; the degreasing agent is Na 2 CO 3 、Na 3 PO 4 12H 2 O, Na 2 SiO 3 and OP-10 emulsifier dissolved in water to obtain the following concentration of aqueous solution:

[0066] Na 2 CO 3 30g / L, Na 3 PO 4 12H 2 O 15g / L, Na 2 SiO 3 15g / L, OP-10 emulsifier 5g / L.

[0067] ②Washing

[0068] Soak the titanium alloy material in hot water at 80°C for 0.5 hours, and then rinse it twice with deionized water at room temperature.

[0069] ③Surface pol...

Embodiment 3

[0080] The boronizing agent used is B 4 C powder, particle size ≤ 0.1mm (obtained by grinding with a sealed laboratory crushing sample maker).

[0081] The TC4 (Ti-6Al-4V) titanium alloy plate was wire-cut into a sample of 10mm×10mm×3mm.

[0082] The boronizing agent is used to perform boronizing treatment on the surface of the titanium alloy, and the steps are as follows.

[0083] 1. Titanium alloy surface pretreatment

[0084] ① Degreasing

[0085] Immerse the titanium alloy material in a degreasing agent at 60°C for 3 hours; the degreasing agent is Na 2 CO 3 、Na 3 PO 4 12H 2 O, Na 2 SiO 3 and OP-10 emulsifier dissolved in water to obtain the following concentration of aqueous solution:

[0086] Na 2 CO 3 10g / L, Na 3 PO 4 12H 2 O 5g / L, Na 2 SiO 3 5g / L, OP-10 emulsifier 2g / L.

[0087] ②Washing

[0088] Soak the titanium alloy material in hot water at 60°C for 2 hours, and then rinse it with deionized water at room temperature for 3 times.

[0089] ③Surface...

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Abstract

The invention relates to a titanium alloy surface boronizing method belonging to the technical field of metal surface treatment. The method comprises the following steps: performing the degreasing, water washing and surface polishing pretreatment on a titanium alloy surface, pressing boron carbide powder penetrating agents with the granularity of less than or equal to 0.1 mm and the pretreated titanium alloy material into sectional materials by using a pressing machine, putting the sectional materials into a crucible and covering the crucible with a cover, sealing gaps between the cover and the crucible by using adhesives, drying the crucible, performing the heating, heat preservation and cooling treatment on the crucible at the condition of raising the temperature with the increase rate of 8-10 DEG C / min to 1000-1200 DEG C in heating and the heat preservation time of 5-20 hours, and taking out the crucible and cooling the crucible to the room temperature. The method can reduce the varieties of composition materials of bornizing agents, thereby simplifying the titanium alloy surface boronizing technology and reducing the operation conditions so as to obtain an ideal alloying thickness of titanium alloy such as TC4 and the like under the air condition, and the boronizing agent of single composition can avoid the pollution of harmful gases to the environment.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to the boronizing technology on the surface of titanium alloy. Background technique [0002] As we all know, titanium alloy has many excellent properties (such as: low density, high specific strength, excellent corrosion resistance and biocompatibility), so it is widely used in aerospace, shipbuilding, chemical and biomedical fields, but its hardness is low 2. The wear resistance is poor, and it is easy to wear when used as a sliding part, which seriously limits its application range. The compound TiB formed due to the reaction of Ti and B 2 It not only has the characteristics of high melting point, high hardness, and high strength of ceramic materials, but also has the advantages of high electrical conductivity and high thermal conductivity of metal materials, which can significantly improve the wear resistance and other surface properties of titanium a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/68
Inventor 衣晓红樊占国李凤华薛向欣
Owner NORTHEASTERN UNIV LIAONING
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