CN110218968A - A kind of method that low temperature liquid phase expands infiltration raising steel surface corrosion resistance - Google Patents
A kind of method that low temperature liquid phase expands infiltration raising steel surface corrosion resistance Download PDFInfo
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- CN110218968A CN110218968A CN201910541258.5A CN201910541258A CN110218968A CN 110218968 A CN110218968 A CN 110218968A CN 201910541258 A CN201910541258 A CN 201910541258A CN 110218968 A CN110218968 A CN 110218968A
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- steel
- steel surface
- corrosion resistance
- liquid phase
- low temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C12/00—Solid state diffusion of at least one non-metal element other than silicon and at least one metal element or silicon into metallic material surfaces
- C23C12/02—Diffusion in one step
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
A kind of method that low temperature liquid phase expands infiltration raising steel surface corrosion resistance, the present invention relates to the methods of steel surface reinforcement.The present invention is to solve the high technical problems of the temperature of existing metal surface expansion infiltration method.Method of the invention: one, steel surface nanosizing；Two, by borax anhydrous, V2O5The borax bath for being 780~900 DEG C with aluminium powder preparation temperature；Three, the steel after activation that step 1 obtains is put into borax bath and is kept for 2~4 hours, obtain corrosion-resistant film layer on steel surface surface.The corrosion-resistant film layer is made of the nanometer sheet of low-temperature original position growth, and the binding force of the film and matrix is strong, and surface has hydrophobicity, and contact angle is 100 °~115 °, to improve the corrosion resistance of metal.It can be used for field of surface treatment.
Description
Technical field
The present invention relates to the methods of steel surface reinforcement.
Background technique
The carbon content of steel is general >=0.3wt.%, corrosion is generated since itself is easily aoxidized in air, steel
Iron etc. is metal surface enhanced to be paid close attention to by all circles all the time with protection.Wherein expanding infiltration method is to make to be intended to the mode of heating diffusion
Metallic cementation or nonmetalloid penetrate into metal material or the surface of workpiece is mentioned to form surface alloying layer by alloy-layer
The performances such as corrosion resistance, the hardness on high metal surface.
Existing metal surface expand infiltration method be using borax as base salt, carbon tool steel and alloy tool steel in vanadium iron or
V2O5And the temperature of the reducing agents such as A1, Si, Ca can be formed several to be handled in 1000 DEG C or more of borax bath on surface
The vanadium coating of micron, improves the hardness of metal surface.But this method is there are borax bath temperature height, and viscosity is big, mobility
The disadvantages of difference, the viscous salt of workpiece is more, cleaning difficulty and fixture heavy corrosion.
Summary of the invention
The present invention is to solve the high technical problems of the temperature of existing metal surface expansion infiltration method, and provide one kind and pass through
Low temperature liquid phase expands the method seeped and improve steel surface corrosion resistance.
Low temperature liquid phase of the invention expands the method seeped and improve steel surface corrosion resistance, sequentially includes the following steps:
One, steel surface is subjected to nanosizing processing；
Two, 50%~65% borax anhydrous (Na is weighed by mass percentage2B4O7), 15%~20%V2O5With 20%~
30% aluminium powder is simultaneously added in expansion infiltration furnace, is heated to 780~900 DEG C, is obtained borax bath；
Three, by nanosizing that step 1 obtains, treated that steel is put into 780~900 DEG C of borax bath keeps 2~4
Hour, it cleans, is dry, obtaining corrosion-resistant film layer in steel surface.
The present invention first passes through mechanical lapping or bead for steel surface nanosizing, has the surface layer of steel matrix nanocrystalline
The main body of structure and matrix still keeps original coarse-grain state, to improve the surface reaction activity of material and to form anti-corrosion knot
Structure is ready；It joined aluminium powder in borax bath, improve the penetration of salt bath, steel surface of the invention is made to have the ability low
It carries out expanding under temperature and seeps reaction, in the film of steel surface growth in situ nanometer chip architecture, surface is made to have hydrophobicity, thus significantly
Improve the corrosion resistance of metal.There is between the film and matrix stronger binding force simultaneously.
The water contact angle of the corrosion-resistant film layer of steel surface of the invention is 100 °~115 °, while borax bath temperature is low, energy
It consumes low, can be used for field of surface treatment.
Detailed description of the invention
Fig. 1 is the XRD diagram for the corrosion-resistant film layer that embodiment 1 is obtained in No. 35 steel surfaces；
Fig. 2 is the stereoscan photograph of the corrosion-resistant film layer that No. 35 steel surfaces obtain after nanosizing of embodiment 1；
Fig. 3 is the stereoscan photograph for the film layer that embodiment 1 is obtained in No. 35 steel surfaces of non-nanosizingization；
Fig. 4 is the Cross Section Morphology and line scanning figure of the corrosion-resistant film layer that No. 35 steel surfaces obtain after nanosizing of embodiment 1；
Fig. 5 is the Cross Section Morphology and line scanning figure for the film layer that embodiment 1 is obtained in No. 35 steel surfaces of non-nanosizing；
Fig. 6 is the contact angle photo of the corrosion-resistant film layer that No. 35 steel surfaces obtain after nanosizing of embodiment 1；
Fig. 7 is the contact angle photo for the comparison film layer of comparative test 1 obtained in No. 35 steel surfaces of non-nanosizing；
Fig. 8 is the hydrophobic angle photo of the comparison film layer that No. 35 steel surfaces obtain after nanosizing of comparative test 2；
Fig. 9 is the stereoscan photograph of the corrosion-resistant film layer that No. 35 steel surfaces obtain after nanosizing of embodiment 2.
Specific embodiment
Specific embodiment 1: present embodiment low temperature liquid phase expand seep improve steel surface corrosion resistance method, by with
Lower step carries out:
One, steel surface is subjected to nanosizing processing；
Two, 50%~65% borax anhydrous (Na is weighed by mass percentage2B4O7), 15%~20%V2O5With 20%~
30% aluminium powder is simultaneously added in expansion infiltration furnace, is heated to 780~900 DEG C, is obtained borax bath；
Three, by nanosizing that step 1 obtains, treated that steel is put into 780~900 DEG C of borax bath keeps 2~4
Hour, it cleans, is dry, obtaining corrosion-resistant film layer in steel surface.
Specific embodiment 2: the present embodiment is different from the first embodiment in that nanosizing described in step 1
Processing is bead.It is other same as the specific embodiment one.
Specific embodiment 3: the present embodiment is different from the first embodiment in that method bead is in shot-peening
In machine, mechanical-vibration type shot-peening is carried out under vacuum, the diameter of bullet is 0.5~3mm, the frequency of mechanical oscillation is 50Hz, bullet
Ball and 10~15mm of steel surface distance, processing time are 30~40min.It is other same as the specific embodiment one.
Specific embodiment 4: described in step 1 unlike one of present embodiment and specific embodiment one to three
Steel is that steel is No. 35 steel.It is other identical as one of specific embodiment one to three.
Specific embodiment 5: described in step 1 unlike one of present embodiment and specific embodiment one to three
Steel is that steel is H13 steel.It is other identical as one of specific embodiment one to three.
Specific embodiment 6: matter is pressed unlike one of present embodiment and specific embodiment one to five in step 2
Amount percentage weighs 55%~60% borax anhydrous, 16%~18% V2O5With 22%~29% aluminium powder.It is other with it is specific
One of embodiment one to five is identical.
Specific embodiment 7: being heated in step 2 unlike one of present embodiment and specific embodiment one to six
To 790~830 DEG C.It is other identical as one of specific embodiment one to six.
Specific embodiment 8: being kept in step 3 unlike one of present embodiment and specific embodiment one to seven
Time is 2.5~3.5 hours.It is other identical as one of specific embodiment one to seven.
Beneficial effects of the present invention are verified with the following examples:
Embodiment 1: the low temperature liquid phase of the present embodiment expands the method seeped and improve steel surface corrosion resistance, according to the following steps into
Row:
One, No. 35 steel surfaces carry out nanosizing processing: No. 35 steel plates being put into compressed air shotblasting machine, are carried out under 0.7MPa vacuum
Mechanical-vibration type shot-peening, wherein the diameter of bullet is 2mm, the frequency of mechanical oscillation is 50Hz, bullet and steel surface distance 10mm,
The processing time is 30min, completes Surface Nanocrystalline；
Two, 55% borax anhydrous, 17% V are weighed by mass percentage2O5Aluminium powder with 28% is uniformly mixed, then plus
Enter to expanding in infiltration furnace, is heated to 780 DEG C, obtains borax bath；
Three, No. 35 steel plates of nanosizing that step 1 obtains processing are put into 780 DEG C of borax bath and keep 2.5 small
When, No. 35 steel surfaces, which are handled, in nanosizing obtains corrosion-resistant film layer.
Comparative test 1: No. 35 steel plates do not do nanosizing processing unlike the first embodiment for this test, other and embodiment 1
It is identical, obtain the film layer as comparison.
The present embodiment the corrosion-resistant film layer that No. 35 steel surfaces obtain XRD diagram as shown in Figure 1, wherein a be nanosizing at
The XRD of No. 35 surface of steel plate film layers after reason is composed, and b is the XRD spectrum of No. 35 surface of steel plate film layers of non-nanosizing processing, from Fig. 1
As can be seen that No. 35 steel plates carry out expansion infiltration again after nanosizing is handled, in film layer relative to the processing processing of non-nanosizing
VCXDiffraction peak intensity enhancing simultaneously iron peak decline, this is conducive to form a film after showing matrix nano.
The stereoscan photograph such as Fig. 2 of the present embodiment in nanosizing treated corrosion-resistant film layer that No. 35 steel surfaces obtain
It is shown, figure it is seen that the film is assembled by nanometer sheet.And what No. 35 steel surfaces of non-nanosizing processing obtained
The stereoscan photograph of film layer as a comparison is as shown in figure 3, from figure 3, it can be seen that No. 35 steel tables without nanosizing processing
The film layer in face and the nanosizing film layer that treated obtains are entirely different, and the film layer without nanosizing processing does not form nanometer sheet
Package assembly.
The Cross Section Morphology figure of the corrosion-resistant film layer that No. 35 steel surfaces of the present embodiment after nanosizing obtain as shown in figure 4,
The Cross Section Morphology figure of the comparison film layer of No. 35 surface of steel plate of non-nanosizing is as shown in figure 5, from fig. 4, it can be seen that in matrix steel
Surface obviously forms certain thickness film layer, can be seen that C, V content from the inside to the outside from the line scanning figure on figure and increases, Fe
Content reduce, illustrate that C, V element are seeped to expanding inside steel from outside to inside, and it can be seen that away from the deeper position in surface in Fig. 4
It sets it can be seen that expanding and seeps point, illustrate to expand and seep the active high of reaction.From fig. 5, it can be seen that steel surface does not have apparent film layer, explanation
When steel matrix is handled without nanosizing, then the diffusion penetration under 780 DEG C of cryogenic conditions, steel surface are difficult to form a film.
Hydrophobicity test, nanosizing are carried out to the corrosion-resistant film layer that No. 35 steel surfaces of the present embodiment after nanosizing obtain
No. 35 steel surfaces afterwards obtain the contact angle photo of corrosion-resistant film layer as shown in fig. 6, its contact angle is 114 °, have well
Hydrophobicity can greatly improve the corrosion resistance of material.The contact angle that No. 35 steel surfaces of non-nanosizing obtain comparison film layer shines
Piece as shown in fig. 7, its contact angle be 36 °, be hydrophilic surface, it is unfavorable to the anti-corrosion of material.
Comparative test 2: the temperature of this test borax bath in step 2 unlike the first embodiment is 1000 DEG C,
He is same as Example 1, obtains the film layer as comparison.
The hydrophobic angle photo of the comparison film layer that comparative test 2 obtains is hydrophilic surface, to material as shown in figure 8, be 61 °
The anti-corrosion of material is unfavorable.Although No. 35 steel surfaces carry out nanosizing processing, expands seep at high temperature, it is difficult to form nanometer sheet
The hydrophobic structure of shape.
Embodiment 2: the low temperature liquid phase of the present embodiment expands the method seeped and improve steel surface corrosion resistance, according to the following steps into
Row:
One, No. 35 steel surfaces carry out nanosizing processing: No. 35 steel plates being put into compressed air shotblasting machine, are carried out under 0.5MPa vacuum
Mechanical-vibration type shot-peening, wherein the diameter of bullet is 1mm, the frequency of mechanical oscillation is 50Hz, bullet and steel surface distance 15mm,
The processing time is 30min, completes Surface Nanocrystalline；
Two, 65% borax anhydrous, 15% V are weighed by mass percentage2O5With 20% aluminium powder and be added to expansion seep furnace
In, 830 DEG C are heated to, borax bath is obtained；
Three, No. 35 steel plates after nanosizing that step 1 obtains are put into 830 DEG C of borax bath and are kept for 3 hours,
Corrosion-resistant film layer is obtained in No. 35 steel surfaces.
The present embodiment 2 obtains the stereoscan photograph of corrosion-resistant film layer as shown in figure 9, can be with from Fig. 9 in No. 35 steel surfaces
Find out, the film layer of No. 35 steel surfaces is assembled by nanometer sheet.EDS energy-spectrum scanning is carried out simultaneously, obtained element composition is such as
Shown in table 1,
1 surface-element of table composition
Corrosion-resistant film layer is obtained to No. 35 steel surfaces of the present embodiment after activation and carries out hydrophobicity test, the results showed that,
The hydrophobic angle that No. 35 steel surfaces after activation obtain corrosion-resistant film layer is 102 °, has preferable hydrophobicity, can mention significantly
The corrosion resistance of high material.
Claims (7)
1. a kind of low temperature liquid phase expands the method seeped and improve steel surface corrosion resistance, it is characterised in that this method according to the following steps into
Row:
One, steel surface is subjected to nanosizing processing；
Two, 50%~65% borax anhydrous, 15%~20%V are weighed by mass percentage2O5With 20%~30% aluminium powder and add
Enter to expanding in infiltration furnace, is heated to 780~900 DEG C, obtains borax bath；
Three, by nanosizing that step 1 obtains, treated that steel is put into 780~900 DEG C of borax bath keeps 2~4 small
When, it cleans, is dry, obtaining corrosion-resistant film layer in steel surface.
2. a kind of low temperature liquid phase according to claim 1 expands the method seeped and improve steel surface corrosion resistance, it is characterised in that
Nanosizing processing described in step 1 is bead.
3. a kind of low temperature liquid phase according to claim 2 expands the method seeped and improve steel surface corrosion resistance, it is characterised in that
Bead is to carry out mechanical-vibration type shot-peening under vacuum in compressed air shotblasting machine, and the diameter of bullet is 0.5~3mm, mechanical oscillation
Frequency be 50Hz, bullet and 10~15mm of steel surface distance, the processing time is 30~40min.
4. a kind of low temperature liquid phase according to claim 1,2 or 3 expands the method seeped and improve steel surface corrosion resistance, feature
It is that steel described in step 1 be steel is No. 35 steel or H13 steel.
5. a kind of low temperature liquid phase according to claim 1,2 or 3 expands the method seeped and improve steel surface corrosion resistance, feature
It is to weigh 55%~60% borax anhydrous, 16%~18% V in step 2 by mass percentage2O5With 22%~29%
Aluminium powder.
6. a kind of low temperature liquid phase according to claim 1,2 or 3 expands the method seeped and improve steel surface corrosion resistance, feature
It is to be heated to 790~830 DEG C in step 2.
7. a kind of low temperature liquid phase according to claim 1,2 or 3 expands the method seeped and improve steel surface corrosion resistance, feature
It is in step 3 that the retention time is 2.5~3.5 hours.
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