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Salt bath vanadium penetration agent and vanadium penetration method for metal titanium surface

A technology for metal titanium and vanadium infiltration, which is applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of low hardness, high cost, thin infiltration layer, etc. Excellent performance

Active Publication Date: 2019-01-18
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex operation, high cost, thin permeation layer and low hardness of the existing vanadium permeation technology, and to invent a salt-bath permeation vanadium agent on the surface of metal titanium, and provide corresponding vanadium permeation process at the same time

Method used

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  • Salt bath vanadium penetration agent and vanadium penetration method for metal titanium surface
  • Salt bath vanadium penetration agent and vanadium penetration method for metal titanium surface
  • Salt bath vanadium penetration agent and vanadium penetration method for metal titanium surface

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Embodiment 1

[0026] Will be made of 699 grams of anhydrous borax (Na 2 B 4 o 7 ), 97 grams of vanadium oxide (V 2 o 5 ), 38.8 grams of boron carbide (B 4 C), 38.8 grams of barium chloride (BaCl 2 ), 9.7 grams of sodium chloride (NaCl), 86 grams of sodium fluoride (NaF), and 30 grams of boron oxide (B 2 o 3 ) mixed evenly and dried in an oven at 120°C for 40 minutes to make a salt bath vanadium penetration agent for later use.

[0027] Wire cut the TC4 titanium alloy bar into 10mm×10mm×3mm profiles for later use to obtain titanium alloy blocks.

[0028] The vanadium penetration process is: metal titanium surface pretreatment - vanadium penetration treatment - cleaning the workpiece

[0029] (1) Surface pretreatment of titanium metal: the surface of the titanium alloy block is degreased and cleaned with deionized water, then sanded and mechanically polished, the surface is polished to a roughness of Ra0.5μm, and then ultrasonically cleaned with acetone for 20 minutes;

[0030] (2) V...

Embodiment 2

[0034] Method is basically the same as embodiment one, and difference is that boron oxide (B 2 o 3 ) into lanthanum oxide (La 2 o 3 ).

[0035] Test after taking out the sample. The thickness of the infiltrated layer can be found to be about 8 μm by scanning electron microscopy ( figure 2 ); the surface hardness of the vanadium infiltration layer is 2562.6HV under the pressure of 50gf.

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Abstract

The invention provides a metallic titanium surface salt-bath vanadizing agent and a vanadizing process thereof. The salt-bath vanadizing agent comprises the following components in percentage by mass: 72% of anhydrous borax (Na2B4O7), 10% of vanadium oxide (V2O5), 4% boron carbide (B4C), 4% barium chloride (BaCl2), 1% sodium chloride (NaCl) and 9% of sodium fluoride (NaF). Through addition of boron oxide (B2O3) or lanthanum oxide (La2O3), the vanadizing layer thickness of 8 [mu]m and the surface microhardness of 2200-2600 HV can be obtained for metallic titanium after heat preservation at 950 DEG for 4 h in a salt-bath vanadizing experiment. The salt-bath vanadizing agent and the vanadizing process provided by the invention have the advantages that the operation process is simple and the economic performance is good, can be applied to industrial production, and have very broad application prospect in the biomedical field and the like.

Description

technical field [0001] The invention relates to a metal material and heat treatment technology, in particular to a titanium alloy modification technology, in particular to a salt bath vanadium penetration agent and a vanadium penetration method for 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, and 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. Vanadium infiltration treatment can significantly improve the wear resistance and corrosion resistance of the metal surface. [0003] At present, three surface technologies widely used in the preparation...

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 许晓静韩天戈晓岚刘庆辉杨松何志盛黄晶
Owner JIANGSU UNIV