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Salt bath niobium infiltrating agent and niobium infiltrating method for catalytic infiltration of Fe powder on titanium surface

A technology of metal titanium and salt bath, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of poor flexibility, high environmental requirements, high cost, etc., and achieve good surface quality of workpieces, low cost, fast penetration effect

Active Publication Date: 2018-12-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high cost, poor flexibility, high equipment and environmental requirements in the existing niobium infiltration technology on the surface of titanium alloys. Niobium method, which can not only obtain niobium infiltrated layer with excellent surface quality while increasing the penetration rate, but also has good operability and excellent economy

Method used

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  • Salt bath niobium infiltrating agent and niobium infiltrating method for catalytic infiltration of Fe powder on titanium surface
  • Salt bath niobium infiltrating agent and niobium infiltrating method for catalytic infiltration of Fe powder on titanium surface
  • Salt bath niobium infiltrating agent and niobium infiltrating method for catalytic infiltration of Fe powder on titanium surface

Examples

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Embodiment 1

[0029] A method for infiltrating niobium on the surface of metal titanium, which comprises the preparation of salt bath infiltrating niobium agent-pretreatment on the surface of metal titanium-niobium infiltrating treatment-cleaning workpiece.

[0030] (1) Preparation of niobium infiltration agent in salt bath, take anhydrous borax (Na 2 B 4 o 7 ) 840 grams, niobium oxide (Nb 2 o 5 ) 100 grams (purity 99.5%), green and pure, silicon carbide (SiC) with a particle size of 150-200 meshes 40 grams and Fe powder 20 grams (purity 99.99%), mix them evenly and place them in an oven at 120 ° C. Dry for 40 minutes to get the required salt bath niobium infiltration agent for use.

[0031] (2) Wire-cut TC4 titanium alloy rods into 10mm×12mm×3mm profiles for later use; degreasing and deionized water on the surface of the metal titanium, and then sanding the surface with sandpaper (choose 120 # 、280 # 、400 # , 800 # 、1000 # ) and mechanical polishing, the surface is polished to a r...

Embodiment 2

[0038] The method is basically the same as in Example 1, except that the niobium infiltrating agent used does not add Fe powder catalyst, and the mass percentage of SiC is 6%.

[0039] Test after taking out the sample. The thickness of the infiltrated layer is 1.6 μm ( figure 2 ), the microhardness of the outer layer of niobium infiltration layer is 943.4HV.

Embodiment 3

[0041] A method for infiltrating niobium on the surface of metal titanium, which comprises the preparation of salt bath infiltrating niobium agent-pretreatment on the surface of metal titanium-niobium infiltrating treatment-cleaning workpiece.

[0042] (1) Preparation of niobium infiltration agent in salt bath, take anhydrous borax (Na 2B 4 o 7 ) 780 grams, niobium oxide (Nb 2 o 5 ) 120 grams (purity 99.5%), green and pure silicon carbide (SiC) with a particle size of 150-200 meshes 40 grams and Fe powder 60 grams (purity 99.99%), mix them evenly and place them in an oven at 100°C. After drying for 60 minutes, the required salt bath niobium infiltrating agent can be obtained for use.

[0043] (2) Wire-cut TC4 titanium alloy rods into 10mm×12mm×3mm profiles for later use; degreasing and cleaning the titanium surface with deionized water, then sanding the surface with sandpaper (choose 120 # 、280 # 、400 # , 800 # 、1000 # ) and mechanical polishing, the surface is polish...

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Abstract

The invention discloses a salt bath niobium seepage agent for seepage catalyzing for metal titanium surface Fe powder and a niobium seepage method. The salt bath niobium seepage agent for seepage catalyzing for the metal titanium surface Fe powder is characterized in that the niobium seepage agent is composed of Na2B4O7, Nb2O5, SiC and Fe powder, and after being evenly mixed, the components are placed in an oven at the temperature ranging from 100 DEG C to 120 DEG C, and the needed salt bath niobium seepage agent can be obtained through drying for 40 min-60 min to be used later. The niobium seepage method comprises the steps of titanium alloy surface treatment, niobium seepage agent heating and salt bath heat preservation niobium seepage. According to the salt bath niobium seepage agent and the niobium seepage method, the seepage speed is high, a seepage layer is thick, the workpiece surface quality is good, the operation technology is simple, and the economic performance is excellent; and the salt bath niobium seepage agent and the niobium seepage method can be used for industrial production and have very wide application prospects in the biomedical field and other fields.

Description

technical field [0001] The invention relates to the field of chemical heat treatment, in particular to a niobium infiltrating agent and a niobium infiltrating process thereof, in particular to a salt bath niobium infiltrating agent and a niobium infiltrating process for infiltration of Fe powder on the surface of metal titanium. Background technique [0002] As biomedical materials, titanium and titanium alloys are widely used in hard tissue replacement, heart valves, vascular stents, tooth Roots and various orthopedic devices, etc. However, although its elastic modulus is lower than that of other biomedical materials, it is still much higher than that of human bone. However, its hardness is low, its coefficient of friction is large, its surface wear resistance is poor, and its corrosion resistance needs to be further improved. Because Ti-Nb alloy has the advantages of ultra-low elastic modulus, corrosion resistance and good biocompatibility, and the infiltration of niobium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/24C23C10/02
CPCC23C10/02C23C10/24
Inventor 许晓静朱金鑫韩天宋振华何星华
Owner JIANGSU UNIV