CN111961916A - Titanium alloy - Google Patents

Titanium alloy Download PDF

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Publication number
CN111961916A
CN111961916A CN202010792974.3A CN202010792974A CN111961916A CN 111961916 A CN111961916 A CN 111961916A CN 202010792974 A CN202010792974 A CN 202010792974A CN 111961916 A CN111961916 A CN 111961916A
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black phosphorus
titanium alloy
peo
polyethylene oxide
weight percent
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曾志坚
陈子雄
洪波
陈旭明
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Sanco New Energy Technology Co Ltd
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Sanco New Energy Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/30—Metallic substrate based on refractory metals (Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W)
    • B05D2202/35—Metallic substrate based on refractory metals (Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W) based on Ti

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

The invention discloses a titanium alloy. The titanium alloy comprises the following components in percentage by weight: 50-53 wt% of Ti; 6 to 8.5 weight percent of Cr; 10.5-15 wt% of Al; c3.5-6.3 wt%; 8-10.3 wt% of Mn; v1-2 wt%; 0.2 to 0.5 weight percent of P; 0.5 to 2.1 weight percent of S; the balance being unavoidable impurities. The titanium alloy has high strength, small density, good mechanical property and good toughness. According to the invention, the surface of the titanium alloy is further coated with the polyoxyethylene-black phosphorus composite material as a modification layer, so that the stability of the prepared black phosphorus film is improved, the compatibility with the titanium alloy is enhanced, and the high corrosion resistance of the titanium alloy is realized.

Description

Titanium alloy
Technical Field
The invention relates to the technical field of titanium alloy materials, in particular to a titanium alloy.
Background
Titanium is an important structural metal developed in the 50 s of the 20 th century, and titanium alloys are widely used in various fields due to their characteristics of high strength, high heat resistance and the like. The importance of titanium alloy materials is recognized in many countries around the world, and the titanium alloy materials are researched, developed and put into practical use. The common Ti-6Al-4V alloy is superior in heat resistance, strength, plasticity, toughness, formability, weldability and biocompatibility, so that the alloy is the King brand alloy in the titanium alloy industry, and the usage amount of the alloy accounts for 75-85% of the total titanium alloy. At present, when the Ti-6Al-4V alloy is applied to an artificial intelligence machine, key parts of the artificial intelligence machine need to be frequently replaced in the operation process due to the insufficient corrosion resistance of the artificial intelligence machine. Therefore, there is a need for improved compositions and structures of titanium alloys to further improve their mechanical properties, toughness, and corrosion resistance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the titanium alloy which has better mechanical property, toughness and corrosion resistance.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a titanium alloy comprises the following components in percentage by weight: 50-53 wt% of Ti; 6 to 8.5 weight percent of Cr; 10.5-15 wt% of Al; c3.5-6.3 wt%; 8-10.3 wt% of Mn; v1-2 wt%; 0.2 to 0.5 weight percent of P; 0.5 to 2.1 weight percent of S; the balance of inevitable impurities; within the range of the mixture ratio, the prepared titanium alloy has small density, good heat resistance, hardness, strength, plasticity, toughness, wear resistance, formability, weldability and biocompatibility and certain corrosion resistance. The Ti alloy has the strength SB of over 1.012GPa and the density g of 4.51g/cm3The specific strength SB/g is more than 23.5, the elastic modulus E is more than 200GPa, and the tensile strength 1040-1100 MPa.
Further, the surface of the titanium alloy is coated with a modification layer, and the modification layer comprises a polyethylene oxide-black phosphorus composite material film. According to the invention, the polyethylene oxide-black phosphorus composite material film is coated on the surface of the titanium alloy, compared with other film materials, the polyethylene oxide-black phosphorus composite material has strong compatibility with the titanium alloy, and is beneficial to improving the corrosion resistance of the titanium alloy.
Furthermore, the thickness of the modification layer is 10 nm-50 μm, and the corrosion resistance of the titanium alloy is remarkably improved within the thickness range.
Further, the black phosphorus is a black phosphorus nanosheet, and the number of layers is 1-50.
Further, the preparation method of the modification layer comprises the following steps:
(1) dispersing black phosphorus into an N-methyl pyrrolidone solution of polyoxyethylene by adopting an ultrasonic-assisted liquid phase stripping method to obtain a black phosphorus mixed solution;
(2) centrifuging the black phosphorus mixed solution, and taking clear liquid with the upper layer not more than 40 vol% to obtain black phosphorus dispersion liquid;
(3) and coating the black phosphorus dispersion liquid on the surface of the titanium alloy, and drying in vacuum to obtain the polyethylene oxide-black phosphorus composite material film.
The preparation method of the polyethylene oxide-black phosphorus composite material film is simple in process, the stability of the prepared polyethylene oxide-black phosphorus composite material film is improved, and the compatibility with the titanium alloy is enhanced, so that the high corrosion resistance of the titanium alloy is realized.
Furthermore, in the step (1), the time of ultrasonic treatment is more than or equal to 1 h.
Further, in the step (1), the concentration of the black phosphorus in the black phosphorus mixed solution is 5 mg/mL.
Further, in the step (2), the rotating speed of the centrifugation is more than or equal to 15000r/min, and the time of the centrifugation is more than or equal to 1 h.
According to the invention, the optimized technological parameters are beneficial to preparing the polyethylene oxide-black phosphorus composite material film which has high bonding strength with the titanium alloy matrix and is beneficial to improving the corrosion resistance of the titanium alloy.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a novel titanium alloy formula, and the prepared titanium alloy has high strength, small density, good mechanical property, good toughness and corrosion resistance by optimizing the proportion of each component.
According to the invention, the surface of the titanium alloy is further coated with the polyoxyethylene-black phosphorus composite material as a modification layer, and the black phosphorus is protected against oxidation, so that the stability of the prepared black phosphorus film is improved, the compatibility with the titanium alloy is enhanced, and the high corrosion resistance of the titanium alloy is realized.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples. It will be understood by those skilled in the art that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the examples, the experimental methods used were all conventional methods unless otherwise specified, and the materials, reagents and the like used were commercially available without otherwise specified.
Example 1
A titanium alloy comprises the following components in percentage by weight: 53 wt% of Ti; 8 wt% of Cr; 14 wt% of Al; c5.3 wt%; 10 wt% of Mn; v2 wt%; p2.3 wt%; 1.1 wt% of S; the balance being unavoidable impurities.
Example 2
A titanium alloy comprises the following components in percentage by weight: 50.5 wt% of Ti; 8 wt% of Cr; 15.5 wt% of Al; c6.3 wt%; 10 wt% of Mn; v2 wt%; p2.3 wt%; 1.1 wt% of S; the balance being unavoidable impurities.
Example 3
A titanium alloy comprises the following components in percentage by weight: 51 wt% of Ti; 6 wt% of Cr; 13.5 wt% of Al; c5.3 wt%; 10 wt% of Mn; v2 wt%; p2.3 wt%; 1.1 wt% of S; the balance being unavoidable impurities.
Example 4
A titanium alloy comprises the following components in percentage by weight: ti 52.5 wt%; 7.5 wt% of Cr; 14.5 wt% of Al; c5.3 wt%; 10.2 wt% of Mn; v2 wt%; p2.5 wt%; s2 wt%; the balance being unavoidable impurities.
Example 5
A titanium alloy comprises the following components in percentage by weight: 53 wt% of Ti; 8.5 wt% of Cr; 15.5 wt% of Al; c6 wt%; 10 wt% of Mn; v2 wt%; p2.5 wt%; s2 wt%; the balance being unavoidable impurities.
Comparative example 1
The conventional Ti-6Al-4V alloy comprises the following components in percentage by weight: al is 6.75 wt%; c is 0.1 wt%; o is 0.2 wt%; si is 0.15 wt%; v is 4.0 wt%; fe is 0.3 wt%; n is 0.05 wt%; h is 0.01 wt%; 0.5 percent of impurity and the balance of Ti.
Example 1'
A corrosion-resistant titanium alloy comprises the following components in percentage by weight: 53 wt% of Ti; 8 wt% of Cr; 14 wt% of Al; c5.3 wt%; 10 wt% of Mn; v2 wt%; p2.3 wt%; 1.1 wt% of S; the balance of inevitable impurities;
the surface of the titanium alloy is further coated with a modification layer with the thickness of 100nm, and the modification layer comprises a polyethylene oxide-black phosphorus composite material film.
The preparation method of the polyethylene oxide-black phosphorus composite film of the embodiment comprises the following steps:
(1) measuring PEO (polyethylene oxide) and ultrapure water by using a pipette, adding the PEO and the ultrapure water into a test tube, and performing ultrasonic dispersion treatment for 30min to obtain PEO dispersion liquid with the concentration of 1 mu L/mL;
(2) weighing black phosphorus powder, adding the black phosphorus powder into PEO dispersion, performing ultrasound for 2 hours by adopting an ultrasound-assisted liquid phase stripping method to prepare PEO-black phosphorus mixed solution with the black phosphorus concentration of 5mg/mL, then centrifuging the PEO-black phosphorus mixed solution for 1 hour at the centrifugal speed of 15000r/min by using a centrifuge, performing centrifugal treatment on the PEO-black phosphorus mixed solution for 60 minutes, and taking clear liquid with 20 volume percent of the upper layer to obtain black phosphorus dispersion containing few-layer black phosphorus nanosheets, wherein the number of the black phosphorus nanosheets is 6; the method comprises the following steps of (1) passivating lone pair electrons of black phosphorus by using PEO (polyethylene oxide) positively charged nitrogen atoms, and carrying out antioxidant protection on the black phosphorus nanosheet;
(3) and (3) titrating the black phosphorus dispersion liquid prepared in the step (2) onto the used titanium alloy, and performing vacuum drying and evaporation on the titanium alloy through a vacuum box to remove water, wherein the drying temperature is 50 ℃, so as to obtain the polyethylene oxide (PEO) -black phosphorus composite material film.
The corrosion-resistant titanium alloy of the embodiment keeps working for more than 1.6 ten thousand hours in the strong alkaline solution with the pH value of 14, and the surface is kept uniform. Compared with unmodified titanium alloy, the service life of the alloy is improved by 20 percent under the same environment.
Example 2'
A corrosion-resistant titanium alloy comprises the following components in percentage by weight: 50.5 wt% of Ti; 8 wt% of Cr; 15.5 wt% of Al; c6.3 wt%; 10 wt% of Mn; v2 wt%; p2.3 wt%; 1.1 wt% of S; the balance being unavoidable impurities.
The surface of the titanium alloy is further coated with a modification layer with the thickness of 100nm, and the modification layer comprises a polyoxyethylene-black phosphorus composite material.
The preparation method of the polyethylene oxide-black phosphorus composite film of the embodiment comprises the following steps:
(1) measuring PEO (polyethylene oxide) and ultrapure water by using a pipette, adding the PEO and the ultrapure water into a test tube, and performing ultrasonic dispersion treatment for 30min to obtain a PEO dispersion liquid with the PEO concentration of 3 mu L/mL;
(2) weighing black phosphorus powder, adding the black phosphorus powder into PEO dispersion liquid, performing ultrasound for 2 hours by adopting an ultrasound-assisted liquid phase stripping method to prepare PEO-black phosphorus mixed liquid with the black phosphorus concentration of 7mg/mL, then centrifuging the PEO-black phosphorus mixed liquid for 1 hour at the centrifugal speed of 15000r/min by using a centrifuge, performing centrifugal treatment on the PEO-black phosphorus mixed liquid for 60 minutes, and taking supernatant of 40% of the upper layer to obtain black phosphorus dispersion liquid containing few-layer black phosphorus nanosheets, wherein the number of the black phosphorus nanosheets is 10; the method comprises the following steps of (1) passivating lone pair electrons of black phosphorus by using PEO (polyethylene oxide) positively charged nitrogen atoms, and carrying out antioxidant protection on the black phosphorus nanosheet;
(3) and (3) titrating the black phosphorus dispersion liquid prepared in the step (2) onto the used titanium alloy, and performing vacuum drying and evaporation on the titanium alloy through a vacuum box to remove water, wherein the drying temperature is 50 ℃, so as to obtain the corrosion-resistant titanium alloy.
The corrosion-resistant titanium alloy of the embodiment can work for more than 1.5 ten thousand hours in the strong acid solution with the pH value of 1, the surface is uniform and consistent, and the service life of the corrosion-resistant titanium alloy is prolonged by 30% compared with that of the unmodified titanium alloy under the same environment.
Example 3'
A corrosion-resistant titanium alloy comprises the following components in percentage by weight: 51 wt% of Ti; 6 wt% of Cr; 13.5 wt% of Al; c5.3 wt%; 10 wt% of Mn; v2 wt%; p2.3 wt%; 1.1 wt% of S; the balance being unavoidable impurities.
The surface of the titanium alloy is further coated with a modification layer with the thickness of 300nm, and the modification layer comprises a polyethylene oxide-black phosphorus composite material film.
The preparation method of the polyethylene oxide-black phosphorus composite film of the embodiment comprises the following steps:
(1) measuring PEO (polyethylene oxide) and ultrapure water by using a pipette, adding the PEO and the ultrapure water into a test tube, and performing ultrasonic dispersion treatment for 30min to obtain PEO dispersion liquid with the PEO concentration of 5 mu L/mL;
(2) weighing black phosphorus powder, adding the black phosphorus powder into PEO dispersion liquid, performing ultrasound for 2 hours by adopting an ultrasound-assisted liquid phase stripping method to prepare PEO-black phosphorus mixed liquid with the black phosphorus concentration of 5mg/mL, then centrifuging the PEO-black phosphorus mixed liquid for 1 hour at the centrifugal speed of 15000r/min by using a centrifuge, performing centrifugal treatment on the PEO-black phosphorus mixed liquid for 60 minutes, and taking supernatant of 40% of the upper layer to obtain black phosphorus dispersion liquid containing few-layer black phosphorus nanosheets, wherein the number of the black phosphorus nanosheets is 10; the method comprises the following steps of (1) passivating lone pair electrons of black phosphorus by using PEO (polyethylene oxide) positively charged nitrogen atoms, and carrying out antioxidant protection on the black phosphorus nanosheet;
(3) and (3) titrating the black phosphorus dispersion liquid prepared in the step (2) onto the used titanium alloy, and performing vacuum drying and evaporation to remove water through a vacuum box, wherein the drying temperature is 50 ℃, so as to obtain the polyoxyethylene-black phosphorus composite material film.
The titanium alloy of the embodiment keeps working for more than 1.8 ten thousand hours in the strong alkaline solution with the pH value of 14, and the surface is kept uniform. Compared with unmodified titanium alloy, the service life of the alloy is improved by 25 percent under the same environment.
Example 4'
A corrosion-resistant titanium alloy comprises the following components in percentage by weight: ti 52.5 wt%; 7.5 wt% of Cr; 14.5 wt% of Al; c5.3 wt%; 10.2 wt% of Mn; v2 wt%; p2.5 wt%; s2 wt%; the balance being inevitable impurities 3.5%.
The surface of the titanium alloy is further coated with a modification layer with the thickness of 5 mu m, and the modification layer comprises a polyethylene oxide-black phosphorus composite material film.
The preparation method of the polyethylene oxide-black phosphorus composite film of the embodiment comprises the following steps:
(1) measuring PEO (polyethylene oxide) and ultrapure water by using a pipette, adding the PEO and the ultrapure water into a test tube, and performing ultrasonic dispersion treatment for 30min to obtain a PEO dispersion liquid with the PEO concentration of 2 mu L/mL;
(2) weighing black phosphorus powder, adding the black phosphorus powder into EO dispersion liquid, performing ultrasonic treatment for 2 hours by adopting an ultrasonic-assisted liquid phase stripping method to prepare PDDA-black phosphorus mixed liquid with the black phosphorus concentration of 5mg/mL, then centrifuging the PDDA-black phosphorus mixed liquid for 60 minutes at the centrifugal speed of 15000r/min by using a centrifuge, and taking supernatant of 40% of the upper layer to obtain the black phosphorus dispersion liquid containing few black phosphorus nanosheets, wherein the number of the black phosphorus nanosheets is 6; the method comprises the following steps of (1) passivating lone pair electrons of black phosphorus by using PEO (polyethylene oxide) positively charged nitrogen atoms, and carrying out antioxidant protection on the black phosphorus nanosheet;
(3) and (3) titrating the black phosphorus dispersion liquid prepared in the step (2) onto the used titanium alloy, and performing vacuum drying and evaporation to remove water through a vacuum box, wherein the drying temperature is 50 ℃, so as to obtain the polyoxyethylene-black phosphorus composite material film.
The corrosion-resistant titanium alloy of the embodiment keeps working for more than 1.6 ten thousand hours in the strong alkaline solution with the pH value of 14, and the surface is kept uniform. Compared with unmodified titanium alloy, the service life of the alloy is improved by 15 percent under the same environment.
Example 5'
A corrosion-resistant titanium alloy comprises the following components in percentage by weight: 53 wt% of Ti; 8.5 wt% of Cr; 15.5 wt% of Al; c6 wt%; 10 wt% of Mn; v2 wt%; p2.5 wt%; s2 wt%; the balance being 0.5% of unavoidable impurities.
The surface of the titanium alloy is further coated with a modification layer with the thickness of 100nm, and the modification layer comprises a polyethylene oxide-black phosphorus composite material film.
The preparation method of the polyethylene oxide-black phosphorus composite film of the embodiment comprises the following steps:
(1) measuring PEO (polyethylene oxide) and ultrapure water by using a pipette, adding the PEO and the ultrapure water into a test tube, and performing ultrasonic dispersion treatment for 30min to obtain a PEO dispersion liquid with the PEO concentration of 1 mu L/mL;
(2) weighing black phosphorus powder, adding the black phosphorus powder into PEO dispersion liquid, performing ultrasound for 1h by adopting an ultrasound-assisted liquid phase stripping method to prepare PEO-black phosphorus mixed liquid with the black phosphorus concentration of 5mg/mL, then centrifuging the PEO-black phosphorus mixed liquid for 2h at the centrifugal speed of 15000r/min by using a centrifuge, performing centrifugal treatment on the PEO-black phosphorus mixed liquid for 60min, and taking a clear liquid of 30% of the upper layer to obtain the black phosphorus dispersion liquid containing few-layer black phosphorus nanosheets, wherein the number of the black phosphorus nanosheets is 6; the method comprises the following steps of (1) passivating lone pair electrons of black phosphorus by using PEO (polyethylene oxide) positively charged nitrogen atoms, and carrying out antioxidant protection on the black phosphorus nanosheet;
(3) and (3) titrating the black phosphorus dispersion liquid prepared in the step (2) onto the used titanium alloy, and performing vacuum drying and evaporation on the titanium alloy through a vacuum box to remove water, wherein the drying temperature is 50 ℃, so as to obtain the corrosion-resistant titanium alloy.
The corrosion-resistant titanium alloy of the embodiment keeps working for more than 2.1 ten thousand hours in the strong alkaline solution with the pH value of 14, and the surface is kept uniform. Compared with unmodified titanium alloy, the service life of the alloy is improved by 28 percent under the same environment.
Comparative example 1'
A corrosion-resistant titanium alloy comprises the following components in percentage by weight: al is 6.75 wt%; c is 0.1 wt%; o is 0.2 wt%; si is 0.15 wt%; v is 4.0 wt%; fe is 0.3 wt%; n is 0.05 wt%; h is 0.01 wt%; 0.5 wt% of impurities and the balance Ti.
The surface of the titanium alloy (Ti-6Al-4V alloy) is further coated with a modification layer with the thickness of 100nm, and the modification layer comprises a polyoxyethylene-black phosphorus composite material film.
The preparation method of the polyethylene oxide-black phosphorus composite film of the embodiment comprises the following steps:
(1) measuring PEO (poly diallyl dimethyl ammonium chloride) and ultrapure water by using a pipetting gun, adding the PEO and the ultrapure water into a test tube, and performing ultrasonic dispersion treatment for 30min to obtain a PEO dispersion liquid with the PEO concentration of 1 mu L/mL;
(2) weighing black phosphorus powder, adding the black phosphorus powder into PEO dispersion, performing ultrasound for 2 hours by adopting an ultrasound-assisted liquid phase stripping method to prepare PDDA-black phosphorus mixed solution with the black phosphorus concentration of 5mg/mL, then centrifuging the PEO-black phosphorus mixed solution for 60 minutes at a centrifugal speed of 15000r/min by using a centrifuge, and taking supernatant of 40% of the upper layer to obtain black phosphorus dispersion containing few-layer black phosphorus nanosheets, wherein the number of the black phosphorus nanosheets is 6; the method comprises the following steps of (1) passivating lone pair electrons of black phosphorus by using PEO (polyethylene oxide) positively charged nitrogen atoms, and carrying out antioxidant protection on the black phosphorus nanosheet;
(3) and (3) titrating the black phosphorus dispersion liquid prepared in the step (2) onto the used titanium alloy, and performing vacuum drying and evaporation on the titanium alloy through a vacuum box to remove water, wherein the drying temperature is 50 ℃, so as to obtain the polyethylene oxide-black phosphorus composite material film.
The corrosion-resistant titanium alloy of the comparative example keeps working for more than 1.1 ten thousand hours in the strong alkaline solution with the pH value of 14, and the surface is kept uniform and consistent. The service life of the alloy is prolonged by 8 percent compared with that of the unmodified titanium alloy under the same environment. The Ti-6Al-4V alloy is used as a machine for working, and the service life of the machine is shorter than that of the titanium alloy used in the patent.
Comparative example 2'
The composition of the corrosion-resistant titanium alloy and the preparation method of the polyethylene oxide-black phosphorus composite film of the comparative example are substantially the same as those of example 1', except that the thickness of the modified layer of the comparative example is 5 nm.
The corrosion-resistant titanium alloy of the comparative example keeps working for more than 1.4 ten thousand hours in the strong alkaline solution with the pH value of 14, and the surface is kept uniform and consistent. Compared with unmodified titanium alloy, the service life of the titanium alloy is prolonged by 5 percent under the same environment. The working life of the titanium alloy is prolonged to a certain extent, but the long service life of the titanium alloy is difficult to realize due to the fact that the thickness of the modification layer is small.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (8)

1. The titanium alloy is characterized by comprising the following components in percentage by weight: 50-53 wt% of Ti; 6 to 8.5 weight percent of Cr; 10.5-15 wt% of Al; c3.5-6.3 wt%; 8-10.3 wt% of Mn; v1-2 wt%; 0.2 to 0.5 weight percent of P; 0.5 to 2.1 weight percent of S; the balance being unavoidable impurities.
2. The titanium alloy of claim 1, wherein a surface of the titanium alloy is coated with a finishing layer, the finishing layer comprising a polyethylene oxide-black phosphorus composite film.
3. The titanium alloy of claim 2, wherein said modification layer has a thickness of 10nm to 50 μm.
4. The titanium alloy of claim 2, wherein said black phosphorus is black phosphorus nanoplate having from 1 to 50 layers.
5. The titanium alloy of claim 2, wherein said modifying layer is prepared by a method comprising the steps of:
(1) dispersing black phosphorus into an N-methyl pyrrolidone solution of polyoxyethylene by adopting an ultrasonic-assisted liquid phase stripping method to obtain a black phosphorus mixed solution;
(2) centrifuging the black phosphorus mixed solution, and taking clear liquid with the upper layer not more than 40 vol% to obtain black phosphorus dispersion liquid;
(3) and coating the black phosphorus dispersion liquid on the surface of the titanium alloy, and drying in vacuum to obtain the polyethylene oxide-black phosphorus composite material film.
6. The titanium alloy according to claim 5, wherein in the step (1), the time of ultrasonic treatment is not less than 1 h.
7. The titanium alloy according to claim 5, wherein in the step (1), the concentration of black phosphorus in the black phosphorus mixed solution is 5 mg/mL.
8. The titanium alloy according to claim 5, wherein in the step (2), the rotation speed of the centrifugation is more than or equal to 15000r/min, and the time of the centrifugation is more than or equal to 1 h.
CN202010792974.3A 2020-08-07 2020-08-07 Titanium alloy Pending CN111961916A (en)

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