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Salt bath niobium infiltrating agent and niobium infiltrating method for metal titanium surface

A technology of metal titanium and salt bath, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of poor flexibility, high cost, poor industrial practicability, etc., and achieve the effect of good interface bonding

Active Publication Date: 2018-12-07
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 high cost, poor flexibility, and poor industrial applicability in the existing niobium infiltration technology on the surface of titanium metal, and to invent a salt bath niobium infiltration agent on the surface of titanium metal, and at the same time provide its infiltration Niobium method, which can not only obtain a niobium infiltrated layer with excellent performance, but also has the characteristics of simple operation, easy realization, low requirements on equipment, etc., and has excellent economical efficiency

Method used

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  • Salt bath niobium infiltrating agent and niobium infiltrating method for metal titanium surface
  • Salt bath niobium infiltrating agent and niobium infiltrating method for metal titanium surface
  • Salt bath niobium infiltrating agent and niobium infiltrating method for metal titanium surface

Examples

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Embodiment 1

[0028] A method for infiltration of niobium on the surface of titanium metal in a salt bath, which includes preparation of an infiltration agent, surface pretreatment of the workpiece, pretreatment of the infiltration agent, niobium infiltration treatment and cleaning of the workpiece.

[0029] The preparation of osmotic agent refers to 840 grams of anhydrous borax 2 B 4 O 7 ), 100 grams of niobium oxide (Nb 2 O 5 ) And 60 grams of silicon carbide (SiC) are mixed uniformly and placed in a 120 ℃ oven for 40 minutes to obtain the required metal titanium surface salt bath niobium agent for use. Among them, silicon carbide is commercially available green and pure silicon carbide with a particle size of 150-200 The purity of niobium oxide is at least 99.5%;

[0030] The surface pretreatment of the workpiece is to cut the TC4 titanium alloy bar into a profile of 10mm×12mm×3mm for use. The surface of the cut titanium metal is cleaned with degreasing and deionized water, and then polished ...

Embodiment 2

[0036] The method is basically the same as in Example 1, except that the niobium infiltration agent formula used is composed of 840 grams of Na 2 B 4 O 7 (Accounting for 84%), 100 grams of Nb 2 O 5 (10%), 60 grams of SiC (6%).

[0037] Test after taking out the sample. The thickness of the seepage layer is 1.6μm ( figure 2 ); The surface hardness of the niobium layer is 1155HV, which is about 3.5 times the hardness of the substrate.

Embodiment 3

[0039] The method is basically the same as that of Example 1, except that the niobium infiltration method used has a temperature of 1000°C.

[0040] After taking out the sample and testing, the surface hardness of the niobium infiltration layer is 1071.8HV, which is about 3.2 times the hardness of the substrate.

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Abstract

The invention discloses a salt-bath niobiumizing agent for the surface of metallic titanium and a niobiumizing method thereof. The salt-bath niobiumizing agent is characterized by consisting of borax anhydrous (Na2B4O7), niobium oxide (Nb2O5) and silicon carbide (SiC), wherein niobiumizing key parameters are that a niobiumizing temperature is 900 DEG C to 1050 DEG C, and a niobiumizing heat preservation time is 4h to 10h. Through the niobiumizing agent and the niobiumizing method, the layer thickness of a niobiumized layer successfully prepared on the surface of the metallic titanium is 1 to 15 microns; the element diffusion which is obvious and further gradient exists between the niobiumized layer and a matrix; the niobiumized layer is good in interface bonding; and the microhardness of a surface layer of the niobiumized layer is 734HV to 1190HV, and is approximately 2.2 to 3.6 times the hardness (approximate 330HV) of the matrix. The salt-bath niobiumizing agent for the surface of the metallic titanium and the niobiumizing method thereof are simple in operation method and excellent in economic performance, can be used for industrial production, and have quite wide application prospects in the fields of biomedical application and the like.

Description

Technical field [0001] The invention relates to a chemical heat treatment technology, in particular to a niobium infiltration agent and a niobium infiltration method, and in particular to a salt bath niobium infiltration agent and a niobium infiltration method for metal titanium surface. Background technique [0002] Titanium and titanium alloys, as biomedical materials, are widely used in hard tissue replacement, heart valves, vascular stents, teeth due to their low elastic modulus, good biocompatibility, corrosion resistance and methodological advantages. Roots and various orthopedic devices. 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, the friction coefficient is large, the surface anti-wear ability is poor, and the corrosion resistance needs to be further improved. Because Ti-Nb alloy has the advantages of ultra-low elastic modulus, corrosion resistance and go...

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
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