CN104562098A - Method for synthesizing titanium-nickel alloy layer through electron beam - Google Patents
Method for synthesizing titanium-nickel alloy layer through electron beam Download PDFInfo
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- CN104562098A CN104562098A CN201410836806.4A CN201410836806A CN104562098A CN 104562098 A CN104562098 A CN 104562098A CN 201410836806 A CN201410836806 A CN 201410836806A CN 104562098 A CN104562098 A CN 104562098A
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Abstract
A method for synthesizing a titanium-nickel alloy layer through an electron beam comprises the following technical steps: 1, a pure-titanium matrix surface is pretreated; 2, the titanium matrix after pretreatment is placed in a prepared plating solution for electronickelling, and the thickness of a plating on the titanium matrix surface is 4-8 mu m; 3, the titanium matrix provided with the plating is cleaned and dried, and a matrix titanium-based nickel plated test piece is obtained and placed in a vacuum sample chamber of a high current pulsed electron beam instrument; 4, the surface of the titanium-based nickel plated test piece is bombarded through irradiation of the high current pulsed electron beam, surface alloying treatment is performed, and the titanium-nickel alloy layer is produced on the titanium matrix. The method has the following benefits: pure titanium subjected to alloying treatment can have excellent wear-resisting property and can improve the corrosion resistance of the matrix effectively, and the alloy layer and the titanium matrix have good binding force. The pure titanium surface is covered with the nickel layer in a plating manner, and the method has the advantages of easiness in implementation and economical application. The high current pulsed electron beam irradiation bombardment is adopted for alloying, and the method has the advantages of simple operation, air pollution prevention and improvement of alloy layer purity.
Description
Technical field
The invention belongs to material surface modifying technology field.The present invention relates to titanium base material method for alloying surface.The method is by adopting the method for plating nickel plating and high-current pulsed electron beam radiation bombardment to form the alloy layer of high tenacity, high abrasion and erosion resistance at pure titanium metal matrix surface.
Background technology
Titanium is widely dispersed in the earth, and content accounts for the 7th, the metal world.The current titanium resource reserves of China have reached 1,000,000,000 tons, occupy first place in the world.Being of wide application of titanium, has broad application prospects at each industrial circles such as aerospace, automobile, biomedicines.But pure titanium is a kind of very active metal, and its equilibrium potential is very low, thermodynamics corrosion tendency is in media as well large, and therefore corrosion-resistant is one of pure titanium metal problem demanding prompt solution.In order to improve the solidity to corrosion of pure titanium metal, working out the process for treating surface such as oxidation, plating, plasma spraying, ion nitriding, ion implantation and laser treatment, enhancing protective effect being served to the oxide film of titanium, obtains desired anticorrosion effect.For the needs to metallic substance in the productions such as sulfuric acid, hydrochloric acid, methylamine solution, high temperature moist chlorine and high-temperature chlorine compound, develop a series of corrosion resistant Ti alloys such as titanium-molybdenum, titanium-palladium, titanium-molybdenum-nickel.Titanium casting employs titanium-32 molybdenum alloy, employs titanium-0.2 palldium alloy, all obtain good anticorrosion effect to the local that the normal environment that crevice corrosion or spot corrosion occur employs titanium-0.3 molybdenum-0.8 nickelalloy or titanium eguipment.
Because the chemically reactive of titanium is large, so titanium or titanium alloy is easy and friction surface generation adhesion phenomenon, gummed and cold welding are had to the susceptibility of height.Under normal circumstances; the surface of titanium material more easily generates the passive film that one deck is made up of nitride and oxide compound; although can make titanium to a certain extent under the media environments such as oxidisability, neutrality and week reduction; obtain protection to a certain extent; but the provide protection of its effects on surface is very low; be not enough to provide good wear resisting property, add that the plasticity of titanium or titanium alloy shears drag and work hardening rate is also general lower, this is all the reason causing its surface abrasion resistance difference.So carry high purity titanium corrosion resistance nature, to improve its wear resistance significant.
Ti-Ni alloy, as a kind of titanium alloy of excellent performance, has excellent wear resisting property, anticorrosive, the advantage such as high damping and super-elasticity.The research of U.S. NASA-Glenn research centre to bearing wear-resisting NI Ti alloy shows, NiTi alloy is after suitable treatment and processing, can obtain high rigidity, satisfactory stability and tribological property, excellent solidity to corrosion, be the high-performance bearing type material with broad prospect of application.
As everyone knows, surface engineering technology is a kind of important method of material property of economizing on resources, reduce costs, improve, and is improve one of effective methods of problem such as material surface wearing and tearing, oxidation, corrosion.At present to pure Titanium base modification, make surface be covered with the method for one deck Ti-Ni alloy layer a lot, study more having: thermospray, ion implantation, surface oxidation treatment, thin film technique, laser surface alloying etc.These methods improve the erosion resistance of pure titanium metal to a certain extent, wear resistance, but also also exist that operating environment difference, complex process, alloy layer are thinner simultaneously, surface irregularity and matrix combine the shortcomings such as difference.
High-current pulsed electron beam process for modifying surface is a kind of high-efficiency cleaning technology that development in recent years is got up, and it has himself characteristics and advantages compared with traditional process of surface treatment.Material macroscopic deformation is little: high-current pulsed electron beam material surface modifying technology is rapidly heated to the regional area of solid material surface and process of lowering the temperature, whole part does not enter the condition of high temperature, little energy is inputted relative to material monolithic, produce macroscopic deformation hardly, the material of process is larger like this.Owing to greatly reducing grind, high-current pulsed electron beam process is appropriate to the part after precision sizing especially; The efficiency of energy transformation is high: high-current pulsed electron beam surface-treated local energy density is very high, and the energy more than 90% of incident electron transforms heat energy, and a very little part is taken away by backscattered electron; Clean: high-current pulsed electron beam process carries out in a vacuum chamber, and do not have the harmful effect that air etc. brings, surface-treated layer is very clean.In addition, in treating processes, do not need other media, can not pollute the material of process and operating environment; Controllability is strong: the energy density of high-current pulsed electron beam, acceleration voltage, and the position of pulsewidth and process material surface can regulate, thus can the degree of depth of control treatment layer accurately; High financial profit: utilize high-current pulsed electron beam process for modifying surface to simplify operation, reduces the turnover time, and reduces use noble metal.
Although have scholar to adopt different process for treating surface to improve the wear-resisting and corrosion resistance nature of titanium, but up to now, the method that nobody adopts electroplating technology and the process of high-current pulsed electron beam radiation bombardment to combine prepares the research of Ti-Ni alloy.
summary of the invention:
The object of the present invention is to provide a kind of preparation method preparing one deck wear resistance, corrosion-resistant good protective layer on pure titanium metal surface, the method employing combines at pure titanium metal electroplating nickel on surface and strong current electron beam radiation bombardment method and obtains Ti-Ni alloy layer.This alloy layer can improve the surface property of titanium.
Adopt electron beam to synthesize a method for Ti-Ni alloy layer, comprise following processing step:
(1) pure Titanium base face pre-treatment: by smooth to surface-brightening for the pure Titanium base of diameter 30mm successively process polishing, degreasing, cleaning, oven dry, to remove surface impurity, grease and water;
(2) pretreated Titanium base being put into the electroplate liquid prepared, is 3 A/dm in current density
2, carry out electronickelling process under electroplating temperature 45 DEG C of conditions, the thickness of coating obtained on Titanium base surface is 4 ~ 8 μm.
(3) will be with coated through cleaning, obtain matrix titanium base nickel plating sample after drying, the vacuum sample putting into high-current pulsed electron beam instrument is indoor;
(4) start high-current pulsed electron beam instrument, be evacuated to vacuum tightness and be less than 3 × 10
-2after Pa, adopt high-current pulsed electron beam irradiation bombardment titanium base nickel plating specimen surface, carry out surface alloying process; Processing parameter is: acceleration voltage 10-15kV, electric current 80-150A, recurrent interval 1-60 second, and pulse number is 10-50 time, and Titanium base is made Ti-Ni alloy layer.
The composition of described electroplate liquid is: single nickel salt 50g/L, boric acid 10g/L, sodium lauryl sulphate 3mg/L.
The composition of described Ti-Ni alloy layer is Ti
2ni alloy.
The described equipment vacuumizing employing is turbomolecular pump.
Beneficial effect of the present invention:
(1) carry out Alloying Treatment to pure titanium metal can give the wear resisting property of its excellence and effectively improve the corrosion resistance nature of matrix, this alloy layer and titanium metal matrix have good bonding force.
(2) adopt the mode of plating to be covered with nickel dam on pure titanium surface, have easy to implement, economic and practical advantage.
(3) adopt high-current pulsed electron beam radiation bombardment alloying, in treating processes, have simple to operate, avoid atmospheric pollution, improve the advantage of alloy layer purity.
Accompanying drawing explanation
Fig. 1 is the Ti-Ni alloy layer XRD spectra that embodiment 1 electron beam irradiation is formed;
Fig. 2 is the Ti-Ni alloy layer XRD spectra that embodiment 2 electron beam irradiation is formed;
Fig. 3 is the Ti-Ni alloy layer XRD spectra that embodiment 3 electron beam irradiation is formed
.
Specific embodiments
The present invention, after titanium base material electroplating nickel on surface, adopts high-current pulsed electron beam radiation bombardment to prepare the method for Ni-Ti alloy layer, is described in further details below in conjunction with example to the present invention.Concrete implementation step is as follows:
embodiment 1:
Adopt electron beam to synthesize a method for Ti-Ni alloy layer, comprise following processing step:
1, the pure Titanium base of diameter 30mm is first used 600# waterproof abrasive paper roughening surface, then use the fine grinding of 1200# waterproof abrasive paper, until after titanium plate surface smooth, put into degreasing fluid, after skimming treatment, use clean water.
2, the Titanium base after skimming treatment is put into the electroplate liquid prepared, carry out Nickel Plating Treatment, the thickness of nickel coating is 4 μm, and the composition of electroplate liquid is: single nickel salt 50g/L, boric acid 10g/L, sodium lauryl sulphate 3mg/L.
3, titanium base nickel plating sample clear water is cleaned nickel dam repeatedly; Surface is not dried containing the nickel plated titanium of electroplate liquid; The titanium base nickel plating sample of surface clean is put into high-current pulsed electron beam vacuum sample indoor.
4, start high-current pulsed electron beam instrument, turbomolecular pump is evacuated to vacuum tightness to 2.5 × 10
-2pa, adopts high-current pulsed electron beam irradiation bombardment nickel plated titanium surface, carries out surface alloying process; Processing parameter is: acceleration voltage 10 kV, electric current 150A, and in 30 seconds recurrent intervals, pulse number is 40 times, and pure Titanium base is made Ti-Ni alloy layer.
The Ti-Ni alloy layer XRD spectra prepared according to case study on implementation 1 as shown in Figure 1.XRD spectra shows to have synthesized Ti
2ni alloy.The Ti-Ni alloy layer prepared according to case study on implementation 1 is at load 5N, and rotating speed 10r/min, friction pair is little thrust ring, and test period is under 10min condition, and recording alloyed layer butt frictional coefficient is 0.31, far below pure titanium 0.53.Use tetrafluoroethylene by specimen enclosure, expose portion is the square shape of length of side 10mm, Applied Electrochemistry workstation, adopt saturated calomel and platinum three-electrode system, the titanium alloy corrosion resistance nature tested pure titanium and prepare according to embodiment 1, corrosive liquid is the artificial saliva prepared according to ISO/TR10271, etching time is 24 hours, sweep velocity is 5mV/s, the titanium alloy surface corrosion potential recording preparation is-0.156V, and the corrosion potential of pure titanium is-0.327V, after alloying is described, erosion resistance strengthens.
embodiment 2:
Adopt electron beam to synthesize a method for Ti-Ni alloy layer, comprise following processing step:
1, the pure Titanium base of diameter 30mm is first used 600# waterproof abrasive paper roughening surface, then use the fine grinding of 1200# waterproof abrasive paper, until after titanium plate surface smooth, put into degreasing fluid, after skimming treatment, use clean water.
2, the Titanium base after skimming treatment is put into the electronickelling liquid prepared, carry out Nickel Plating Treatment, preparation nickel plated titanium, the thickness of nickel coating is 8 μm, and the composition of electroplate liquid is: single nickel salt 50g/L, boric acid 10g/L, sodium lauryl sulphate 3mg/L.
3, titanium base nickel plating sample clear water is cleaned nickel dam repeatedly; Surface is not dried containing the nickel plated titanium of electroplate liquid; The titanium base nickel plating sample of surface clean is put into high-current pulsed electron beam vacuum sample indoor.
4, start high-current pulsed electron beam instrument, turbomolecular pump is evacuated to vacuum tightness to 2.0 × 10
-2pa, adopts high-current pulsed electron beam irradiation bombardment nickel plated titanium surface, carries out surface alloying process; Processing parameter is: acceleration voltage 15 kV, electric current 80A, and in 50 seconds recurrent intervals, pulse number is 10 times, and pure Titanium base is made Ti-Ni alloy layer.
The Ti-Ni alloy layer XRD spectra prepared according to case study on implementation 2 as shown in Figure 2.XRD spectra shows to have synthesized Ti
2ni alloy.The Ti-Ni alloy layer prepared according to case study on implementation 2 is at load 5N, and rotating speed 10r/min, friction pair is little thrust ring, and test period is under 10min condition, and recording alloyed layer butt frictional coefficient is 0.29, far below pure titanium 0.53.Use tetrafluoroethylene by specimen enclosure, expose portion is the square shape of length of side 10mm, Applied Electrochemistry workstation, adopt saturated calomel and platinum three-electrode system, the titanium alloy corrosion resistance nature tested pure titanium and prepare according to embodiment 2, corrosive liquid is the artificial saliva prepared according to ISO/TR10271, etching time is 24 hours, sweep velocity is 5mV/s, the titanium alloy surface corrosion potential recording preparation is-0.116V, and the corrosion potential of pure titanium is-0.327V, after alloying is described, erosion resistance strengthens.
embodiment 3:
Adopt electron beam to synthesize a method for Ti-Ni alloy layer, comprise following processing step:
1, the pure Titanium base of diameter 30mm is first used 600# waterproof abrasive paper roughening surface, then use the fine grinding of 1200# waterproof abrasive paper, until after titanium plate surface smooth, put into degreasing fluid, after skimming treatment, use clean water.
2, the Titanium base after skimming treatment is put into the electronickelling liquid prepared, carry out Nickel Plating Treatment, preparation nickel plated titanium, the thickness of nickel coating is 6 μm, and the composition of electroplate liquid is: single nickel salt 50g/L, boric acid 10g/L, sodium lauryl sulphate 3mg/L.
3, titanium base nickel plating sample clear water is cleaned nickel dam repeatedly; Surface is not dried containing the nickel plated titanium of electroplate liquid; The titanium base nickel plating sample of surface clean is put into high-current pulsed electron beam vacuum sample indoor.
4, start high-current pulsed electron beam instrument, turbomolecular pump is evacuated to vacuum tightness to 2.3 × 10
-2pa, adopts high-current pulsed electron beam irradiation bombardment nickel plated titanium surface, carries out surface alloying process; Processing parameter is: acceleration voltage 12 kV, electric current 120A, and in 35 seconds recurrent intervals, pulse number is 35 times, and pure Titanium base is made Ti-Ni alloy layer.
The Ti-Ni alloy layer XRD spectra prepared according to case study on implementation 3 as shown in Figure 3.XRD spectra shows to have synthesized Ti
2ni alloy.The Ti-Ni alloy layer prepared according to case study on implementation 3 is at load 5N, and rotating speed 10r/min, friction pair is little thrust ring, and test period is under 10min condition, and recording alloyed layer butt frictional coefficient is 0.25, far below pure titanium 0.53.Use tetrafluoroethylene by specimen enclosure, expose portion is the square shape of length of side 10mm, Applied Electrochemistry workstation, adopt saturated calomel and platinum three-electrode system, the titanium alloy corrosion resistance nature tested pure titanium and prepare according to embodiment 3, corrosive liquid is the artificial saliva prepared according to ISO/TR10271, etching time is 24 hours, sweep velocity is 5mV/s, the titanium alloy surface corrosion potential recording preparation is-0.023V, and the corrosion potential of pure titanium is-0.327V, after alloying is described, erosion resistance strengthens.
Claims (4)
1. adopt electron beam to synthesize a method for Ti-Ni alloy layer, it is characterized in that: comprise following processing step:
(1) pure Titanium base face pre-treatment: by smooth to surface-brightening for the pure Titanium base of diameter 30mm successively process polishing, degreasing, cleaning, oven dry, to remove surface impurity, grease and water;
(2) pretreated Titanium base being put into the electroplate liquid prepared, is 3 A/dm in current density
2, carry out electronickelling process under electroplating temperature 45 DEG C of conditions, the thickness of coating obtained on Titanium base surface is 4 ~ 8 μm;
(3) will be with coated through cleaning, obtain matrix titanium base nickel plating sample after drying, the vacuum sample putting into high-current pulsed electron beam instrument is indoor;
(4) start high-current pulsed electron beam instrument, be evacuated to vacuum tightness and be less than 3 × 10
-2after Pa, adopt high-current pulsed electron beam irradiation bombardment titanium base nickel plating specimen surface, carry out surface alloying process; Processing parameter is: acceleration voltage 10-15kV, electric current 80-150A, recurrent interval 1-60 second, and pulse number is 10-50 time, and Titanium base is made Ti-Ni alloy layer.
2. adopt the method for employing electron beam according to claim 1 synthesis Ti-Ni alloy layer, it is characterized in that: the composition of described electroplate liquid is: single nickel salt 50g/L, boric acid 10g/L, sodium lauryl sulphate 3mg/L.
3. adopt the method for employing electron beam according to claim 1 synthesis Ti-Ni alloy layer, it is characterized in that: the composition of described Ti-Ni alloy layer is Ti
2ni alloy.
4. adopt the method for employing electron beam according to claim 1 synthesis Ti-Ni alloy layer, it is characterized in that: the described equipment vacuumizing employing is turbomolecular pump.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108251873A (en) * | 2018-01-22 | 2018-07-06 | 南昌大学 | A kind of surface modifying method of titanium alloy surface electroplated layer electron beam remelting again |
| CN113577271A (en) * | 2021-07-28 | 2021-11-02 | 苏州广林皓医药科技有限公司 | Preparation method of graphene-ferroferric oxide composite magnetic carrier |
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| CN113577271A (en) * | 2021-07-28 | 2021-11-02 | 苏州广林皓医药科技有限公司 | Preparation method of graphene-ferroferric oxide composite magnetic carrier |
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Inventor after: Gao Jinglong Inventor after: Su Jingyu Inventor after: Yuan Zhigang Inventor after: Liu Yanhui Inventor after: Huang Liang Inventor before: Liu Yanhui Inventor before: Su Jingyu Inventor before: Gao Jinglong Inventor before: Zhi Ye Inventor before: Wang Di Inventor before: Cao Jian |
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