CN110257818A - The surface treatment method of Continuous Casting Rolls - Google Patents
The surface treatment method of Continuous Casting Rolls Download PDFInfo
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- CN110257818A CN110257818A CN201910078244.4A CN201910078244A CN110257818A CN 110257818 A CN110257818 A CN 110257818A CN 201910078244 A CN201910078244 A CN 201910078244A CN 110257818 A CN110257818 A CN 110257818A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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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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- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Continuous Casting (AREA)
Abstract
The present invention relates to field of metal surface treatment technology more particularly to a kind of surface treatment methods of Continuous Casting Rolls.The surface treatment method includes: to carry out ungrease treatment to the roll surface of Continuous Casting Rolls；Prepare cladding material, the cladding material be it is powdered, each component is respectively as follows: Ni:1.2-1.5%, Cr:13%, C:0.25%, Mn:1.2%, Si:0.5%, surplus Fe according to mass percent；By laser scanning by the roll surface of cladding material cladding to Continuous Casting Rolls, to form cladding layer.
Description
Technical field
The present invention relates to field of metal surface treatment technology more particularly to a kind of surface treatment methods of Continuous Casting Rolls.
Background technique
Continuous Casting Rolls are one of the critical components on conticaster, directly affect the flatness and quality of steel billet.Along with the modern times
The fast development of steel, novel steel products are many kinds of, especially use of the continuous casting of superior alloy steel to Continuous Casting Rolls
It is required that higher and higher: Continuous Casting Rolls must have good high temperature resistant scaling loss, corrosion-resistant and thermal fatigue resistance energy.In actual production
In, Continuous Casting Rolls are since the alternate stress of the prolonged and repeated thermal stress for bearing high temperature billet steel and cooling circulating water acts on, often
There are ablation, burn into peelings, the failure modes such as heat fatigue, or even roll breakage phenomenon occur, seriously affected continuous-casting of steel billet production with
Product quality.
Early stage Continuous Casting Rolls base material is based on 15CrMo, 20CrMo steel, with the increase of the continuous casting demand of high-grade slab, even
Casting roll base material is also gradually based on 42CrMo4,21CrMoV-5, to meet the good mechanical performance of continuous casting roll body.These are polynary
Cr-Mo-Ni-V low-alloy steel, after quenched, hardness is moderate, has good cold and hot working performance and anti-fatigue performance.Though
The Continuous Casting Rolls base material of right New Type Material has improvement in practical effect, and still, high-grade slab is very high to Continuous Casting Rolls requirement, this
Ablation, abrasion, corrosion equivalent damage still can more early occur in a little plastics on new materials continuous casting roller surfaces, be still difficult to meet continuous casting high-performance,
The production of long-life needs.
Carry out this research as critical component long-life process on continuous casting line of Continuous Casting Rolls, completion key portion
The reinforcing of part manufactures, and for promoting service life, the operating rate of China's continuous casting installation for casting, improves the final product quality of continuous casting billet, and
Iron and steel enterprise's cost is reduced, there is important theoretical and practical significance.
Summary of the invention
(1) technical problems to be solved
The surface of existing Continuous Casting Rolls is easy to appear ablation, abrasion, corrosion equivalent damage, it is difficult to meet high property when continuous casting work
Energy, the production of long-life need.
(2) technical solution
In order to solve the above-mentioned technical problems, the present invention provides a kind of surface treatment methods of Continuous Casting Rolls.The surface treatment
Method includes:
Ungrease treatment is carried out to the roll surface of Continuous Casting Rolls；Prepare cladding material, the cladding material be it is powdered, each component is pressed
It is respectively as follows: Ni:1.2-1.5%, Cr:13%, C:0.25%, Mn:1.2%, Si:0.5%, surplus Fe according to mass percent；
By laser scanning by the roll surface of cladding material cladding to Continuous Casting Rolls, to form cladding layer.
Optionally, before carrying out cladding, by the unilateral turning 0.8-1.0mm of the roll surface of the Continuous Casting Rolls.
Optionally, the one-sided thickness of the cladding layer obtained is 1.5mm.
Optionally, parameter when laser scanning are as follows: the hot spot of laser is the rectangular light spot of 2 × 14mm, and scan power is
2000-4000W, scanning speed 200-800mm/min.
Optionally, in laser cladding process, the granularity of cladding material is 135-325 mesh.
Optionally, in laser melting coating, overlapping rate 10-50%.
Optionally, when carrying out ungrease treatment, degreasing agent is organic solvent.
Optionally, when carrying out laser melting coating, nitrogen is passed through into molten bath.
Optionally, further include to just melt it is good after enter the molten road of the state of cooling and be passed through nitrogen, nitrogenized with carrying out second
Processing.
(3) beneficial effect
Above-mentioned technical proposal of the invention has the advantages that be handled using roll surface of the laser melting coating to Continuous Casting Rolls,
The low alloyed steel continuous casting roller of more former overall material is more suitable for the production status of high-grade continuous casting billet, and surface fused coating has excellent
Comprehensive performance.Meanwhile laser melting coating is concentrated with energy, it is metallurgical bonding between cladding alloy-layer and matrix that workpiece deflection is small,
The small advantage of residual stress.
The continuous casting roller surface that laser melting coating is strengthened can obtain high-intensitive, high rigidity institutional framework, hence it is evident that improve conjunction
The resistance to scaling loss of golden cladding layer, corrosion-resistant and high temperature wear resistant performance, compound Continuous Casting Rolls its service life after reinforcing reach whole
3 times or more of low-alloy material Continuous Casting Rolls service life have economic benefit outstanding and social benefit.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
It is a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
According to one embodiment of present invention, a kind of surface treatment method of Continuous Casting Rolls is provided.The surface treatment method
Include:
S1, ungrease treatment is carried out to the roll surface of Continuous Casting Rolls.The purpose of degreasing is the grease for removing continuous casting roller surface.Grease exists
The integrality of cladding layer can be destroyed in laser cladding process and reduces the adhesive force of cladding layer.
In one example, degreasing is carried out using organic solvent, for example, organic solvent is dehydrated alcohol, acetone, four chlorinations
Carbon etc..Degreasing is carried out to the roll surface of Continuous Casting Rolls by the modes such as impregnating, wiping.This mode can be effectively removed the oil on roll surface
Rouge.
After degreasing, magnetic powder inspection and ultrasonic examination are used to Continuous Casting Rolls, check for surface and underbead crack
The defects of.
S2, cladding material is prepared.The cladding material is powdered.Each component is respectively as follows: Ni according to mass percent:
1.2-1.5%, Cr:13%, C:0.25%, Mn:1.2%, Si:0.5%, surplus Fe.
S3, by laser scanning by the roll surface of cladding material cladding to Continuous Casting Rolls, to form cladding layer.
Laser melting coating is to add cladding material by the roll surface in Continuous Casting Rolls, and make cladding using the laser beam of high-energy-density
The method of material consolidation together with the thin layer of the roll surface of Continuous Casting Rolls.On roll surface, cladding material in conjunction with the material of Continuous Casting Rolls, with
Form cladding layer.Above-mentioned cladding material can in laser cladding process with 15CrMo, 20CrMo, 42CrMo4,21CrMoV-5
Etc. materials formed high intensity, high tenacity, high corrosion-resistant cladding layer.
Preferably, the granularity of cladding material is 135-325 mesh.Cladding material is easy to be melted in the particle size range, and
And the roll surface of Continuous Casting Rolls is liable to stick in charging.The feeding manner of cladding material be presetting system feed or synchronous mode into
Material.Above-mentioned feeding manner is the common knowledge of this field, is not elaborated herein.
Preferably, parameter when laser scanning are as follows: the hot spot of laser is the rectangular light spot of 2 × 14mm.It should be having a size of molten
The size in pond.Scan power is 2000-4000W.Scanning speed is 200-800mm/min.Cladding material can under this condition
It promptly melts, to be fused together with Continuous Casting Rolls, to form cladding layer.
In one example, in laser melting coating, overlapping rate 10-50%.Overlapping rate refers to the adjacent road Liang Gerong phase
The width of mutual overlap and the percentage of molten road width.Overlapping rate is the principal element for influencing clad layer surface roughness.It takes
Connect that rate is higher, then the roughness of clad layer surface can reduce, but the uniformity of overlap hardly results in guarantee, and waste molten
Cover material.Overlapping rate is lower, then the thickness of the cladding layer of adjacent molten road connecting portion is lower, and clad layer surface is coarse
It spends higher.Within the scope of the overlapping rate, the thickness of the cladding layer of formation is uniform, and the roughness on surface is low.
Optionally, before carrying out cladding, by the unilateral turning 0.8-1.0mm of the roll surface of the Continuous Casting Rolls.This mode, one
Aspect is able to satisfy the whole size requirement of Continuous Casting Rolls；On the other hand by turning, the oxide layer of roll surface can be removed, exposes and lives
The higher surface of property, this makes the quality of cladding layer higher.
Optionally, the one-sided thickness of the cladding layer obtained is 1.5mm.In the thickness range, the hardness of cladding layer is higher.
Cladding layer it is good with compactness, the homogeneity of roll surface connecting portion.
In one example, when carrying out laser melting coating, nitrogen is passed through into molten bath.Nitrogen uses industrial nitrogen, purity nitrogen
Or High Purity Nitrogen.Nitrogen can play the role of protecting gas, prevent cladding layer excessive oxidation.And nitrogen is anti-with cladding material
Nitriding layer should be generated.Nitriding layer can significantly improve the performances such as the hardness of cladding layer, corrosion resistance.
Preferably, the speed that is passed through of nitrogen is 6-15L/min；This is passed through the shape that speed will not influence the metal of molten condition
Looks, and it is moderate with cladding material reaction speed.
Further, further include further include to just melt it is good after enter the molten road of the state of cooling and be passed through nitrogen, to carry out the
Secondary nitrogen treatment.Preferably, the speed that is passed through of nitrogen is 8-15L/min.
First time nitrogen treatment can play the role of inert gas shielding, prevent metal from aoxidizing, while realizing first
Secondary nitrogen treatment；The second road nitrogen being passed through is synchronized to just cooling molten road, realizes second of the surface nitrogen of cladding layer 13
Change processing.
By nitrogen treatment twice, nitriding layer can be formed in clad layer surface.Nitriding layer include nickel oxide, chromium nitride,
The nitride such as silicon nitride, nitrogenized manganese and nitrided iron.Nitriding layer can effectively improve the hardness of cladding layer, wearability and anti-corrosion
Property.
According to one embodiment of present invention, the Continuous Casting Rolls after being surface-treated using laser melting coating, more former entirety material
The low alloyed steel continuous casting roller of matter is more suitable for the production status of high-grade continuous casting billet.The cladding layer on surface has excellent comprehensive
Energy.Meanwhile laser melting coating is concentrated with energy, it is metallurgical bonding between cladding alloy-layer and matrix that workpiece deflection is small, and remnants are answered
The small advantage of power.
The surface for the Continuous Casting Rolls being surface-treated using laser melting coating can obtain high-intensitive, high rigidity institutional framework,
Significantly improve the resistance to scaling loss of alloy cladding layer, corrosion-resistant and high temperature wear resistant performance.For example, the compound company after surface treated
The service life of casting roll reaches 3 times or more of whole low-alloy material Continuous Casting Rolls service life.
In laser cladding process, the moisture in cladding material can form stomata in cladding layer, destroy the complete of cladding layer
It is whole.In order to solve the technical problem, before carrying out cladding, drying and processing is carried out to cladding material.For example, being dried in drying equipment
Dry cladding material, for use.Drying temperature is 120-180 DEG C, drying time are as follows: 1-2h.This method can be effectively removed cladding material
Moisture in material.
Certainly, dry mode is not limited to the above embodiments, and those skilled in the art can select according to actual needs
It selects.
In one example, before carrying out laser melting coating, magnetic powder inspection and/or ultrasonic examination, inspection are used to Continuous Casting Rolls
The defects of looking into the presence or absence of surface and underbead crack.
In one example, after laser melting coating, by the Continuous Casting Rolls after lathe process cladding, obtain size, tolerance and
Surface smoothness meets the reinforcing Continuous Casting Rolls of drawing requirement.
Also, the defects of surface dye penetrant inspection is carried out to the Continuous Casting Rolls after turning, has detected whether crackle, to passed examination
Finished product apply and antirust oil and pack.
Embodiment 1
Firstly, on former design drawing size basis, by the unilateral turning 0.8mm again of the roll surface of the Continuous Casting Rolls processed.So
Afterwards, ungrease treatment is carried out using acetone or dehydrated alcohol to the roll surface of the Continuous Casting Rolls after machining.Next, using magnetic powder inspection
And ultrasonic examination, check turning after Continuous Casting Rolls whether there is surface and underbead crack the defects of.Next, alloyage powder
End, the alloying powder, each ingredient percent are as follows: Ni:1.2%, Cr:13%, C:0.25%, Mn:1.2%, Si:
0.5%, surplus Fe, the mesh number of alloy powder are 135-325 mesh.Swash next, Continuous Casting Rolls are fixed on high power semi-conductor
On light numerical control machine tool, the hot spot of laser is the rectangular light spot of 2 × 14mm, scan power 2000W, and scanning speed is
200mm/min, overlapping rate 10% are used the alloy powder of gravity conveying by laser scanning, obtained in the roll surface of Continuous Casting Rolls
Cladding alloy-layer.Cladding layer one-sided thickness 1.5mm.Next, obtaining size, public affairs by the Continuous Casting Rolls after lathe process cladding
Difference and surface smoothness meet the reinforcing Continuous Casting Rolls of drawing requirement.It is visited finally, carrying out surface coloring to the Continuous Casting Rolls after turning
The defects of hurting, having detected whether crackle applies antirust oil to the finished product of passed examination and packs.
Embodiment 2
Firstly, on former design drawing size basis, by the unilateral turning 1.0mm again of the roll surface of the Continuous Casting Rolls processed.So
Afterwards, acetone or washes of absolute alcohol are used to the roll surface of the Continuous Casting Rolls after machining.Next, using magnetic powder inspection and ultrasonic wave
The defects of flaw detection, the Continuous Casting Rolls after checking turning whether there is surface and underbead crack.Next, alloyage powder, described
Alloying powder, each ingredient percent are as follows: Ni:1.5%, Cr 13%, C:0.25%, Mn:1.2%, Si:0.5%,
Surplus is Fe, and the mesh number of alloy powder is 135-325 mesh.Next, Continuous Casting Rolls are fixed on high-power semiconductor laser numerical control
On machining tool, the hot spot of laser is the rectangular light spot of 2 × 14mm, scan power 4000W, scanning speed 800mm/
Min, overlapping rate 50% are used the alloy powder of gravity conveying by laser scanning, obtain cladding alloy in continuous casting roller surface
Layer.Cladding layer one-sided thickness 1.5mm.Next, obtaining size, tolerance and surface by the Continuous Casting Rolls after lathe process cladding
Finish meets the reinforcing Continuous Casting Rolls of drawing requirement.Finally, carrying out surface dye penetrant inspection to the Continuous Casting Rolls after turning, detection is
It is no to have the defects of crackle, antirust oil is applied to the finished product of passed examination and is packed.
Embodiment 3
Firstly, on former design drawing size basis, by the unilateral turning 0.8mm again of the roll surface of the Continuous Casting Rolls processed.It connects
Get off, acetone or washes of absolute alcohol are used to the roll surface of the Continuous Casting Rolls after machining；Using magnetic powder inspection and ultrasonic examination,
The defects of Continuous Casting Rolls after checking turning whether there is surface and underbead crack.Next, alloyage powder, the alloying
Powder, each ingredient percent are as follows: Ni:1.3%, Cr:13%, C:0.25%, Mn:1.2%, Si:0.5%, surplus are
Fe, the mesh number of alloy powder are 135-325 mesh.Next, Continuous Casting Rolls are fixed on high-power semiconductor laser numerical control machine
On bed, the hot spot of laser is the rectangular light spot of 2 × 14mm, scan power 3000W, scanning speed 400mm/min, overlap joint
Rate is 25%, and the alloy powder of gravity conveying is used by laser scanning, obtains cladding alloy-layer in continuous casting roller surface.Cladding layer
One-sided thickness 1.5mm.Next, obtaining size, tolerance and surface smoothness by the Continuous Casting Rolls after lathe process cladding and according with
Close the reinforcing Continuous Casting Rolls of drawing requirement.Finally, carrying out surface dye penetrant inspection to the Continuous Casting Rolls after turning, crackle etc. has been detected whether
Defect applies antirust oil to the finished product of passed examination and packs.
Embodiment 4
Firstly, on former design drawing size basis, by the unilateral turning 1.0mm again of the roll surface of the Continuous Casting Rolls processed.So
Afterwards, acetone or washes of absolute alcohol are used to the Continuous Casting Rolls roll surface after machining.Next, being visited using magnetic powder inspection and ultrasonic wave
The defects of wound, the Continuous Casting Rolls after checking turning whether there is surface and underbead crack.Next, alloyage powder, the conjunction
Aurification powder, each ingredient percent are as follows: Ni:1.4%, Cr:13%, C:0.25%, Mn:1.2%, Si:0.5%, it is remaining
Amount is Fe, and the mesh number of alloy powder is 135-325 mesh.Add next, Continuous Casting Rolls are fixed on high-power semiconductor laser numerical control
On work lathe, rectangular light spot of the hot spot of laser for 2 × 14mm, scan power 3200W, scanning speed 450mm/min,
Overlapping rate is 30%, and the alloy powder of gravity conveying is used by laser scanning, obtains cladding alloy-layer in continuous casting roller surface.It is molten
Coating one-sided thickness 1.5mm.Next, obtaining size, tolerance and surface smoothness by the Continuous Casting Rolls after lathe process cladding
Meet the reinforcing Continuous Casting Rolls of drawing requirement.Continuous Casting Rolls after finally, carry out surface dye penetrant inspection, have detected whether that crackle etc. lacks
It falls into, antirust oil is applied to the finished product of passed examination and packs.
Embodiment 5
Firstly, on former design drawing size basis, by the unilateral turning 1.0mm again of the roll surface of the Continuous Casting Rolls processed.Then,
Acetone or washes of absolute alcohol are used to the roll surface of the Continuous Casting Rolls after machining.Next, being visited using magnetic powder inspection and ultrasonic wave
The defects of wound, the Continuous Casting Rolls after checking turning whether there is surface and underbead crack.Next, alloyage powder, the conjunction
Aurification powder, each ingredient percent are as follows: Ni:1.2%, Cr:13%, C:0.25%, Mn:1.2%, Si:0.5%, it is remaining
Amount is Fe, and the mesh number of alloy powder is 135-325 mesh.Add next, Continuous Casting Rolls are fixed on high-power semiconductor laser numerical control
On work lathe, rectangular light spot of the hot spot of laser for 2 × 14mm, scan power 3600W, scanning speed 600mm/min,
Overlapping rate is 20%, and the alloy powder of gravity conveying is used by laser scanning, obtains cladding alloy-layer in continuous casting roller surface.It is molten
Coating one-sided thickness 1.5mm.Next, obtaining size, tolerance and surface smoothness by the Continuous Casting Rolls after lathe process cladding
Meet the reinforcing Continuous Casting Rolls of drawing requirement.Next, carrying out surface dye penetrant inspection to the Continuous Casting Rolls after turning, detect whether
The defects of crackle, applies antirust oil to the finished product of passed examination and packs.
Embodiment 6
Firstly, on former design drawing size basis, by the unilateral turning 0.9mm again of the roll surface of the Continuous Casting Rolls processed.So
Afterwards, acetone or washes of absolute alcohol are used to the roll surface of the Continuous Casting Rolls after machining.Next, using magnetic powder inspection and ultrasonic wave
The defects of flaw detection, the Continuous Casting Rolls after checking turning whether there is surface and underbead crack.Next, alloyage powder, described
Alloying powder, each ingredient percent are as follows: Ni:1.5%, Cr:13%, C:0.25%, Mn:1.2%, Si:0.5%,
Surplus is Fe, and the mesh number of alloy powder is 135-325 mesh.Next, Continuous Casting Rolls are fixed on high-power semiconductor laser numerical control
On machining tool, the hot spot of laser is the rectangular light spot of 2 × 14mm, scan power 3800W, scanning speed 720mm/
Min, overlapping rate 15% are used the alloy powder of gravity conveying by laser scanning, obtain cladding alloy in continuous casting roller surface
Layer.Cladding layer one-sided thickness 1.5mm.Next, obtaining size, tolerance and surface by the Continuous Casting Rolls after lathe process cladding
Finish meets the reinforcing Continuous Casting Rolls of drawing requirement.Finally, carrying out surface dye penetrant inspection to the Continuous Casting Rolls after turning, detection is
It is no to have the defects of crackle, antirust oil is applied to the finished product of passed examination and is packed.
Embodiment 7
Firstly, on former design drawing size basis, by the unilateral turning 0.8mm again of the Continuous Casting Rolls roll surface processed.Then,
Acetone or washes of absolute alcohol are used to the Continuous Casting Rolls roll surface after machining.Next, using magnetic powder inspection and ultrasonic examination,
The defects of Continuous Casting Rolls after checking turning whether there is surface and underbead crack.Next, alloyage powder, the alloying
Powder, each ingredient percent are as follows: Ni:1.2%, Cr:13%, C:0.25%, Mn:1.2%, Si:0.5%, surplus are
Fe, the mesh number of alloy powder are 135-325 mesh.Next, Continuous Casting Rolls are fixed on high-power semiconductor laser numerical control machine
On bed, the hot spot of laser is the rectangular light spot of 2 × 14mm, scan power 2500W, scanning speed 250mm/min, overlap joint
Rate is 40%, and the alloy powder of gravity conveying is used by laser scanning, obtains cladding alloy-layer, cladding layer in continuous casting roller surface
One-sided thickness 1.5mm.Next, obtaining size, tolerance and surface smoothness by the Continuous Casting Rolls after lathe process cladding and according with
Close the reinforcing Continuous Casting Rolls of drawing requirement.Finally, carrying out surface dye penetrant inspection to the Continuous Casting Rolls after turning, crackle etc. has been detected whether
Defect applies antirust oil to the finished product of passed examination and packs.
Embodiment 8
Firstly, on former design drawing size basis, by the unilateral turning 1.0mm again of the roll surface of the Continuous Casting Rolls processed.So
Afterwards, acetone or washes of absolute alcohol are used to the Continuous Casting Rolls roll surface after machining.Next, being visited using magnetic powder inspection and ultrasonic wave
The defects of wound, the Continuous Casting Rolls after checking turning whether there is surface and underbead crack.Next, alloyage powder, the conjunction
Aurification powder, each ingredient percent are as follows: Ni:1.5%, Cr:13%, C:0.25%, Mn:1.2%, Si:0.5%, it is remaining
Amount is Fe, and the mesh number of alloy powder is 135-325 mesh.Add next, Continuous Casting Rolls are fixed on high-power semiconductor laser numerical control
On work lathe, rectangular light spot of the hot spot of laser for 2 × 14mm, scan power 2100W, scanning speed 210mm/min,
Overlapping rate is 25%, and the alloy powder of gravity conveying is used by laser scanning, obtains cladding alloy-layer in continuous casting roller surface,
Nitrogen is passed through in laser cladding process into molten bath.Preferably, secondary nitrogen treatment is carried out.Cladding layer one-sided thickness 1.5mm.It connects
Get off, by the Continuous Casting Rolls after lathe process cladding, obtains the reinforcing that size, tolerance and surface smoothness meet drawing requirement
Continuous Casting Rolls.Finally, the defects of surface dye penetrant inspection is carried out to the Continuous Casting Rolls after turning, has detected whether crackle, to passed examination
Finished product apply and antirust oil and pack.
Above-mentioned each embodiment can form complete cladding layer, and be formed in cladding layer by nitriding layer.It obtains
Hardness, wearability, the corrosion resistance of workpiece are good.
The above is only a kind of preferred embodiment of the invention, it is noted that for the common skill of the art
For art personnel, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improve and
Modification also should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of surface treatment method of Continuous Casting Rolls, wherein include:
Ungrease treatment is carried out to the roll surface of Continuous Casting Rolls；
Prepare cladding material, the cladding material be it is powdered, each component is respectively as follows: Ni:1.2- according to mass percent
1.5%, Cr:13%, C:0.25%, Mn:1.2%, Si:0.5%, surplus Fe；
By laser scanning by the roll surface of cladding material cladding to Continuous Casting Rolls, to form cladding layer.
2. the surface treatment method of Continuous Casting Rolls according to claim 1, wherein before carrying out cladding, by the continuous casting
The unilateral turning 0.8-1.0mm of the roll surface of roller.
3. the surface treatment method of Continuous Casting Rolls according to claim 1, wherein the one-sided thickness of obtained cladding layer is
1.5mm。
4. the surface treatment method of Continuous Casting Rolls according to claim 1, wherein parameter when laser scanning are as follows: laser
Hot spot be 2 × 14mm rectangular light spot, scan power 2000-4000W, scanning speed 200-800mm/min.
5. the surface treatment method of Continuous Casting Rolls according to claim 1, wherein in laser cladding process, cladding material
Granularity be 135-325 mesh.
6. the surface treatment method of Continuous Casting Rolls according to claim 1, wherein the overlapping rate of the cladding layer of formation is 10-
50%.
7. the surface treatment method of Continuous Casting Rolls according to claim 1, wherein when carrying out ungrease treatment, degreasing agent is
Organic solvent.
8. the surface treatment method of Continuous Casting Rolls according to claim 1, wherein when carrying out laser melting coating, into molten bath
It is passed through nitrogen.
9. the surface treatment method of Continuous Casting Rolls according to claim 8, wherein further include entering cooling after just melting well
The molten road of state is passed through nitrogen, to carry out second of nitrogen treatment.
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| CN114807933A (en) * | 2022-06-13 | 2022-07-29 | 华北理工大学 | Laser cladding coating and preparation method thereof |
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