CN110499506A - A kind of high-ductility high-temperature self-lubrication nickel-base antiwear composite layer, preparation method and application - Google Patents
A kind of high-ductility high-temperature self-lubrication nickel-base antiwear composite layer, preparation method and application Download PDFInfo
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- CN110499506A CN110499506A CN201910823456.0A CN201910823456A CN110499506A CN 110499506 A CN110499506 A CN 110499506A CN 201910823456 A CN201910823456 A CN 201910823456A CN 110499506 A CN110499506 A CN 110499506A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
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- 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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Abstract
The invention discloses a kind of high-ductility high-temperature self-lubrication nickel-base antiwear composite layers, preparation method and application, the following steps are included: also known as taking Ni, Cr, Fe, B, Si metal powder, it is uniformly mixed and obtains alloyed powder, the alloyed powder is uniformly mixed with binder, obtains high-ductility high temoperature self lubricating nickel base alloy slurry；It polishes ductile cast iron roller matrix surface, in the matrix surface coating high-ductility high temoperature self lubricating nickel base alloy slurry, then is dried, isothermal holding；It the substrate preheating for being coated with high-ductility high temoperature self lubricating nickel base alloy slurry, is then fixed in the substrate frame of laser, laser speed 1350mm/min is set, carries out Alloying Treatment under nitrogen protection, obtains high-ductility high-temperature self-lubrication nickel-base antiwear composite layer.High-ductility high-temperature self-lubrication nickel-base antiwear composite layer of the invention, applied at elevated temperature Wear is strong, and the compound layer surface of high-ductility high-temperature self-lubrication nickel-base antiwear does not crack and gas hole defect, extends the service life of spheroidal graphite cast-iron hot roll.
Description
Technical field
The invention belongs to process for modifying surface field more particularly to a kind of high-ductility high-temperature self-lubrication nickel-base antiwear composite layer,
Preparation method and application.
Background technique
In Steel-rolling Industry, the molding of steel material depends on hot roll, and the quality of hot roll performance influences steel products
Quality and production efficiency.In actual production, the extent of deterioration of hot roll is much higher than other workpiece, and reduces hot roll loss
Key be improve hot roll performance, prolong its service life.In general, hot roll operating temperature is 700~800 DEG C, rolling
When preparing high-temp steel, hot roll bears higher pulsating stress, periodical effect of the surface also by stocking abrasion and cooling water.
Therefore more demanding to the wear resistance at elevated temperature of hot-pressing roller.
Currently, hot roll is mostly manufactured using spheroidal graphite cast-iron, spheroidal graphite cast-iron intensity with higher and certain toughness, modeling
Property, while also there are the characteristics such as wear-resisting, damping, insensitive to notch, it is widely used in the industry, carbon steel and steel alloy can be replaced
Manufacture stress complexity, the part more demanding to intensity, toughness and wearability, such as high temperature spheroidal graphite hot roll, crankshaft, cylinder sleeve.
But the high temperature abrasion resistance of spheroidal graphite cast-iron is slightly worse, under harsh applied at elevated temperature environment, often causes to lose because surface is worn
Effect.
Summary of the invention
Technical problem to be solved by the present invention lies in: wearing no resistance under the conditions of spheroidal graphite cast-iron hot roll applied at elevated temperature,
Provide a kind of high-ductility high-temperature self-lubrication nickel-base antiwear composite layer, preparation method and application.
The present invention is to solve above-mentioned technical problem, a kind of high-ductility high-temperature self-lubrication of the invention by the following technical programs
The preparation method of nickel-base antiwear composite layer, comprising the following steps:
(1) according to mass ratio be 70:15:5:5:5 weigh Ni, Cr, Fe, B, Si metal powder respectively, wherein Ni, Cr, Fe,
B, the partial size of Si is 80~150 μm.It is uniformly mixed and obtains alloyed powder, by the alloyed powder and binder according to mass ratio 1:1
It is uniformly mixed, obtains high-ductility high temoperature self lubricating nickel base alloy slurry；
(2) it polishes ductile cast iron roller matrix surface, is then successively cleaned by ultrasonic with acetone, alcohol, cleaning is completed
The high-ductility high temoperature self lubricating nickel base alloy slurry described in matrix surface coating afterwards, drying, isothermal holding at 200 DEG C, heat preservation
25~28h of time, coating layer thickness is 0.5~1.0mm after drying；
(3) matrix for being coated with high-ductility high temoperature self lubricating nickel base alloy slurry is preheated at 200~250 DEG C, then will
It is fixed in the substrate frame of laser, and 2000~2500W of laser power, overlapping rate 0.45~0.5, spot diameter 3.5 is arranged
~4.0mm, laser scanning speed 1350mm/min carry out Alloying Treatment under nitrogen protection, obtain high-ductility high-temperature self-lubrication
Nickel-base antiwear composite layer.
As one of preferred embodiment of the invention, in the step (1), binder is alcohol.
A kind of high-ductility high temperature that the preparation method by the high-ductility high-temperature self-lubrication nickel-base antiwear composite layer is prepared
Self-lubricating nickel-base antiwear composite layer.
The composite layer, including ductile cast iron roller matrix and the successively molding heat affecting diffusion layer and Ni-based on matrix
Alloy-layer.
As one of preferred embodiment of the invention, the nickel base alloy layer is with a thickness of 0.9~1.0mm.
As one of preferred embodiment of the invention, the nickel base alloy layer hardness is 700~800HV0.1。
As one of preferred embodiment of the invention, the nickel base alloy layer coefficient of friction is 0.20~0.40.
High-ductility high-temperature self-lubrication nickel-base antiwear composite layer described in a kind of is preparing answering on wearable ductile iron hot roll
With.
The present invention discloses a kind of preparation method of high-ductility high-temperature self-lubrication nickel-base antiwear composite layer, select Ni, Cr, Fe, B,
After the mixing of Si metal powder, high-ductility high-temperature self-lubrication nickel-base antiwear composite layer is prepared, the high-ductility high-temperature self-lubrication nickel-base antiwear is multiple
Closing layer includes ductile cast iron roller matrix and successively molding heat affecting diffusion layer and nickel base alloy layer on matrix, is made in high temperature
Under the conditions of, the oxide layer containing NiO is formed in nickel base alloy layer, which has self-lubricating function, reduce nickel-base alloy
The coefficient of friction of layer, improves spheroidal graphite cast-iron hot roll and exists the defects of reducing the face crack rate and stomata of nickel base alloy layer
Wear-resisting property under high temperature extends its service life, saves cost.Spheroidal graphite cast-iron hot roll matrix and nickel base alloy layer exist
There are larger differences in hardness, ingredient, and nickel base alloy layer is caused to crack, while making nickel base alloy layer and spheroidal graphite cast-iron hot rolling
Binding force between roller matrix is poor.By acting on lower part division gold element in the heat of laser in laser alloying process
Counterdiffusion occurs with matrix, is formed with tiny martensite around the heat affected zone organization of globular graphite.This group is woven in firmly
Between nickel base alloy layer and spheroidal graphite cast-iron on degree and ingredient, can be very good to reduce nickel base alloy layer due to matrix hardness and
Ingredient differs greatly and the crackle that generates, while improving the binding force between nickel base alloy layer and spheroidal graphite cast-iron hot roll matrix.
The mass ratio of Ni, Cr, Fe, B, Si metal powder is 70:15:5:5:5, the high-ductility high temperature prepared under the conditions of mixture ratios
Self-lubricating nickel-base antiwear composite layer, there is excellent toughness, mechanical property and wear resistance at elevated temperature；Fe element can be mentioned further
The hardness of high-alloying layer.
The present invention has the advantage that compared with prior art
High-ductility high-temperature self-lubrication nickel-base antiwear composite layer of the invention, applied at elevated temperature Wear is strong, Ni-based conjunction
Layer gold does not crack and gas hole defect, and the binding force between nickel base alloy layer and spheroidal graphite cast-iron hot roll matrix is strong, extends
The service life of spheroidal graphite cast-iron hot roll.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of high-ductility high-temperature self-lubrication nickel-base antiwear composite layer of the invention；
Fig. 2 is the electromicroscopic photograph of the high-ductility high-temperature self-lubrication nickel-base antiwear composite layer of embodiment 1；
Fig. 3 is the high temperature friction coefficient curve of the nickel base alloy layer of embodiment 1；
Fig. 4 is the Raman spectrogram of the nickel base alloy layer of embodiment 1.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
As shown in Figure 1, high-ductility high-temperature self-lubrication nickel-base antiwear composite layer of the invention include ductile cast iron roller matrix and
Successively molding heat affecting diffusion layer and nickel base alloy layer on matrix surface.
Embodiment 1
The present embodiment provides a kind of preparation methods of high-ductility high-temperature self-lubrication nickel-base antiwear composite layer, comprising the following steps:
It (1) is that 70:15:5:5:5 weighs Ni, Cr, Fe, B, Si metal powder, Ni, Cr, Fe, B, Si respectively according to mass ratio
Partial size be 100 μm, be uniformly mixed obtain alloyed powder, the alloyed powder is uniformly mixed with binder, obtains high-ductility high temperature
Self-lubricating nickel-base alloy slurry, the mass ratio that alloyed powder is mixed with binder are 1:1；
(2) it polishes ductile cast iron roller matrix surface, is then cleaned by ultrasonic 15min with acetone, then is ultrasonic with alcohol
15min is cleaned, hot roll matrix surface polishing cleaning is adhered to surface free from admixture, without spot, then dries and is placed on behaviour
Make on platform, uniformly coats the high-ductility high temoperature self lubricating nickel base alloy slurry by hand in matrix surface, then dried, kept the temperature
Processing, drying temperature and holding temperature are 200 DEG C, soaking time 20h, and coating layer thickness is 0.5mm after drying；
(3) matrix for being coated with high-ductility high temoperature self lubricating nickel base alloy slurry is preheated at 200 DEG C with flame gun, so
It is fixed in the substrate frame of laser afterwards, successively sets laser technical parameters on an operating system as laser power
2000W, overlapping rate 0.45, spot diameter 3.5mm, laser scanning speed 1350mm/min, by laser printhead according to matrix location
With its angle of height adjustment, so that laser is projected direction and matrix surface is kept for 45 °, laser printhead use " it " font movement side
Formula keeps the maximum utilization efficiency of laser and stable overlapping rate, the high instantaneous energy input of laser and high cooling velocity to make gold
The production for the defects of belonging to tissue can sufficiently refine, and the laser scanning speed of 1350mm/min can reduce extension and the bubble of crackle
It is raw, the quality of alloying in alloy layer formation process is improved, carries out Alloying Treatment under nitrogen protection, obtains high-ductility high temperature certainly
Lubricate nickel-base antiwear composite layer.
The electromicroscopic photograph of the high-ductility high-temperature self-lubrication nickel-base antiwear composite layer of preparation is described as shown in Fig. 2, as shown in Figure 2
High-ductility high-temperature self-lubrication nickel-base antiwear composite layer successively include spheroidal graphite cast-iron matrix, heat affecting diffusion layer and nickel base alloy layer,
The nickel base alloy layer is with a thickness of 1mm.
Fig. 3 is the high temperature friction coefficient curve of the nickel base alloy layer, and the test load is 20N, time 3600s,
Revolving speed is 364r/min, grinding defect diameter 7mm, 700 DEG C of temperature.Known by Fig. 3, the nickel base alloy layer high temperature friction coefficient is low
To 0.3, wear resistance at elevated temperature promotion reaches energy level or more.
The surface hardness of the nickel base alloy layer of preparation is about 750HV0.1。
Fig. 4 is the Raman spectrogram of the nickel base alloy layer, and as shown in Figure 4, after high temperature friction and wear, described is Ni-based
The oxide with high-temperature self-lubrication effect such as NiO is formed in alloy-layer.The light spot size is 1 μm, exciting power
2mw, time for exposure 10s.
Embodiment 2
The present embodiment provides a kind of preparation methods of high-ductility high-temperature self-lubrication nickel-base antiwear composite layer, comprising the following steps:
It (1) is that 70:15:5:5:5 weighs Ni, Cr, Fe, B, Si metal powder, Ni, Cr, Fe, B, Si respectively according to mass ratio
Partial size be 100 μm, be uniformly mixed obtain alloyed powder, the alloyed powder is uniformly mixed with binder, obtains high-ductility high temperature
Self-lubricating nickel-base alloy slurry, the mass ratio that alloyed powder is mixed with binder are 1:1；
(2) it polishes ductile cast iron roller matrix surface, is then successively cleaned by ultrasonic with acetone, alcohol, cleaning is completed
The high-ductility high temoperature self lubricating nickel base alloy slurry described in matrix surface coating afterwards, then dried, isothermal holding drying temperature
It is 200 DEG C with holding temperature, for 24 hours, coating layer thickness is 0.7mm to soaking time after drying；
(3) matrix for being coated with high-ductility high temoperature self lubricating nickel base alloy slurry is preheated at 220 DEG C, is then fixed
In the substrate frame of laser, setting laser technical parameters are laser power 2200W, overlapping rate 0.47, spot diameter 3.8mm,
Laser scanning speed 900mm/min carries out Alloying Treatment under nitrogen protection, and it is multiple to obtain high-ductility high-temperature self-lubrication nickel-base antiwear
Close layer.
The high temperature friction coefficient of the nickel base alloy layer of preparation is 0.2, and surface hardness is about 700HV0.1。
Embodiment 3
The present embodiment provides a kind of preparation methods of high-ductility high-temperature self-lubrication nickel-base antiwear composite layer, comprising the following steps:
It (1) is that 70:15:5:5:5 weighs Ni, Cr, Fe, B, Si metal powder, Ni, Cr, Fe, B, Si respectively according to mass ratio
Partial size be 100 μm, be uniformly mixed obtain alloyed powder, the alloyed powder is uniformly mixed with binder, obtains high-ductility high temperature
Self-lubricating nickel-base alloy slurry, the mass ratio that alloyed powder is mixed with binder are 1:1；
(2) it polishes ductile cast iron roller matrix surface, is then successively cleaned by ultrasonic with acetone, alcohol, cleaning is completed
The high-ductility high temoperature self lubricating nickel base alloy slurry described in matrix surface coating afterwards, then dried, isothermal holding drying temperature
It is 200 DEG C with holding temperature, soaking time 28h, coating layer thickness is 1.0mm after drying；
(3) matrix for being coated with high-ductility high temoperature self lubricating nickel base alloy slurry is preheated at 250 DEG C, is then fixed
In the substrate frame of laser, setting laser technical parameters are laser power 2500W, overlapping rate 0.5, spot diameter 4.0mm,
Laser scanning speed 600mm/min carries out Alloying Treatment under nitrogen protection, and it is multiple to obtain high-ductility high-temperature self-lubrication nickel-base antiwear
Close layer.
The high temperature friction coefficient of the nickel base alloy layer of preparation is 0.4, and surface hardness is about 800HV0.1。
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of preparation method of high-ductility high-temperature self-lubrication nickel-base antiwear composite layer, which comprises the following steps:
It (1) is that 70:15:5:5:5 weighs Ni, Cr, Fe, B, Si metal powder, the grain of Ni, Cr, Fe, B, Si respectively according to mass ratio
Diameter is uniformly mixed for 80~150 μm and obtains alloyed powder, and the alloyed powder is uniformly mixed with binder according to mass ratio 1:1,
Obtain high-ductility high temoperature self lubricating nickel base alloy slurry；
(2) polish ductile cast iron roller matrix surface, then successively with acetone, alcohol be cleaned by ultrasonic, after the completion of cleaning
The matrix surface coating high-ductility high temoperature self lubricating nickel base alloy slurry, drying, isothermal holding, soaking time at 200 DEG C
25~28h, coating layer thickness is 0.7~1.0mm after drying；
(3) matrix for being coated with high-ductility high temoperature self lubricating nickel base alloy slurry is preheated at 250 DEG C, is then fixed in sharp
In the substrate frame of light device, laser power 2200W, overlapping rate 0.5, spot diameter 4.0mm, laser scanning speed 1350mm/ are set
Min carries out Alloying Treatment under nitrogen protection, obtains high-ductility high-temperature self-lubrication nickel-base antiwear composite layer.
2. the preparation method of high-ductility high-temperature self-lubrication nickel-base antiwear composite layer according to claim 1, which is characterized in that institute
It states in step (1), binder is alcohol.
3. a kind of prepared by claim 1, the preparation method of 2 described in any item high-ductility high-temperature self-lubrication nickel-base antiwear composite layers
Obtained high-ductility high-temperature self-lubrication nickel-base antiwear composite layer.
4. high-ductility high-temperature self-lubrication nickel-base antiwear composite layer according to claim 3, which is characterized in that including spheroidal graphite cast-iron
Roller matrix and successively molding heat affecting diffusion layer and nickel base alloy layer on matrix.
5. high-ductility high-temperature self-lubrication nickel-base antiwear composite layer according to claim 4, which is characterized in that the Ni-based conjunction
Layer gold is with a thickness of 0.9~1.0mm.
6. high-ductility high-temperature self-lubrication nickel-base antiwear composite layer according to claim 4, which is characterized in that the Ni-based conjunction
Layer gold hardness is 700~800HV0.1。
7. high-ductility high-temperature self-lubrication nickel-base antiwear composite layer according to claim 4, which is characterized in that the Ni-based conjunction
Layer gold coefficient of friction is 0.20~0.40.
8. a kind of as the described in any item high-ductility high-temperature self-lubrication nickel-base antiwear composite layers of claim 3~7 are preparing wear-resistant ball
Application on black cast iron hot roll.
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