CN107338434A - Wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ and preparation method thereof - Google Patents
Wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ and preparation method thereof Download PDFInfo
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- 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
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- 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 wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ and preparation method thereof, by be base material comprising wear-resisting phase, lubrication be mutually that additive forms；Wherein, wear-resisting phase is cermet NiCr/Cr3C2Metal-ceramic composite powder end；Lubrication is mutually the self-lubricating solid sulfide WS of layer structure2、MoS2, one or both of FeS combination of the above；The wear-resisting composite coating of high-temperature self-lubrication includes γ NiCrAlTi/TiC high-temperature wearables composite coatings and γ NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications；The good lubrication transfer membrane of toughness is formed by adding self-lubricating solid agent metal sulfide in wear surface drawout, makes composite coating that there is comprehensive excellent wear resistant friction reducing performance；By laser melting and coating technique, using the cooperative effect of self-lubricating solid agent, solves metal alloy surface wear failure problem, there is provided a kind of inexpensive, efficient part repair mode, meet the needs of part remanufactures production.
Description
Technical field
The invention belongs to field of metal surface treatment technology, and in particular to the spontaneous high-temperature self-lubrication of Laser Cladding in-situ is wear-resisting
Composite coating and preparation method thereof.
Background technology
The normal huge economic losses caused by surface abrasion fails of traditional steel class part, are prepared high on wear part surface
Hardness, the cladding layer of high-wearing feature are the important channels of inoperative component of increasing the service life, repair.By selecting laser melting coating to close
Gold, the case hardness, wearability or corrosion resistance of part can be improved, improve surface machining property, moreover it is possible to repaired because of mill
The part for damaging and failing, extends its service life；Therefore, before laser melting and coating technique has good development in field of surface treatment
Scape.
Titanium alloy has outstanding advantages of fusing point is high, density is low, specific strength is high, corrosion resistance excellent, good biocompatibility,
It is used widely in the fields such as Aero-Space, biomedicine.But by hardness it is low, wear no resistance the shortcomings of restricted, typically not
It can serve as important fricting movement pair parts.In addition, the relative of strong friction abrasive action is much born under the high temperature conditions
Kinematic pair parts not only require excellent wearability and inoxidizability, and additional due to that can not be realized under hot conditions
Lubricant and must have excellent self-lubricating property.At present, the improvement for titanium alloy surface performance, which is concentrated mainly on, passes through
Its case hardness is improved to improve its anti-wear performance, but aggravates the frictional compatibility of the abrasion, i.e. mating plate of mating plate simultaneously
Or self-lubricating property is poor, so not only to there is preferable anti-wear performance, also there is relatively low coefficient of friction.It is basic due to wearing
Occur on the surface of material or parts, prepared using advanced Surface Engineering means on its surface high hardness, wearability and
The good coating of frictional compatibility undoubtedly has higher economy and feasibility.
Solid lubrication technology is for solving rubbing for the key components and parts such as some aerospace, metallurgy, chemical industry, thermonuclear industrial equipment
Wiping, wear problem are significant.But low friction in the range of wide temperature range can not be met by only relying on single kollag
Abrasion, the compound method of kollag can be used, using the complementation between different kollags, to reach environment pair
The requirement of material friction performance.So reasonably combined many kinds of solids lubricant, using their cooperative effects to solve because of temperature liter
Parts lubrication failure problem is the developing direction of self-lubricating technology in recent years caused by height.
The content of the invention
It is an object of the invention to provide the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ.
The present invention also aims to the preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ.
The purpose of the present invention is achieved through the following technical solutions：
The wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, by being that base material, lubrication are mutually to add comprising wear-resisting phase
Agent is added to form；Wherein, the content of wear-resisting phase is 70-90wt%, and the content for lubricating phase is 10-30wt%.
Described wear-resisting phase is cermet, and described cermet is NiCr/Cr3C2Cermet is compound
Powder.
Described NiCr/Cr3C2Metal-ceramic composite powder end is by including the raw material group of following components and weight percent content
Into：Ni 14-18wt%, Cr 3-5wt%, Cr3C279-81wt%, average grain diameter 10-50um.
Described lubrication is mutually the self-lubricating solid sulfide of layer structure, and purity is not less than 99.9wt%, average grain diameter
For 0.8-2um.
Described self-lubricating solid sulfide includes WS2, MoS2, one or both of FeS combination of the above.
The preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, is comprised the steps of：
(1) pretreatment of matrix material：Matrix material is Ti6Al4V sheet alloys, and pretreatment includes surface polishing, surface
Degreasing and rust removal, the surface polishing use 1000 mesh SiC liquid honings, and the surface degreasing derusting is carried out using absolute ethyl alcohol
Surface clean and wiping, are then dried for standby；
(2) preparation of preset coating raw material is with mixing：Raw material is weighed according to the wear-resisting phase and lubrication phase percentage by weight,
Using mechanical ball mill process for refining, first by the NiCr/Cr3C2Metal-ceramic composite powder end ball milling 1-3h, then by the solid
Self-lubricating sulfide mixing and ball milling 2-4h obtains composite powder, and the rotational speed of ball-mill is 400-600r/min, ratio of grinding media to material 2-4:1；
(3) preparation of preset coating：The composite powder described in step (2) is bonded using methylcellulose and is preset in step
(1) the pretreated matrix surface, naturally dry；Then put it into the drying box that temperature is 50-60 DEG C and be incubated 2-3h
Heating and dehumidification obtains the preset coating that thickness is 1-3mm；
(4) laser melting and coating process：Laser is opened, laser cladding technological parameter is adjusted, in the case where protecting gas shielded, to step
(3) preset coating described in carries out laser melting coating, the wear-resisting compound painting of in-situ authigenic high-temperature self-lubrication under laser energy irradiation
Layer.
Ti6Al4V sheet alloys described in step (1) are by including the raw material group of following components and weight percent content
Into：Al 6.3wt%, V 4.2wt%, Fe0.11wt%, C 0.03wt%, N 0.03wt%, O 0.15wt%, surplus Ti.
Laser is 10kw high power transverse flows CO in described step (4)2Laser.
Technological parameter includes in described step (4)：The protection gas is argon gas, and protection air pressure is 0.5-1.0Mpa, is swashed
Luminous power is 1-4kW, sweep speed 4-8mm/s, spot diameter 3-6mm, laser energy density 50-200J/mm3。
It is compound that described step (4) high temperature self-lubricating abrasion-resistant composite coating includes γ-NiCrAlTi/TiC high-temperature wearables
Coating and γ-NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications；γ-the NiCrAlTi/
TiC high-temperature wearables composite coating comprising enhancing phase TiC and toughness reinforcing phase γ-NiCrAlTi solid solution by forming, average microhardness
For 1100HV0.2；γ-the NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications is by including enhancing
Phase TiC and TiWC2, toughness reinforcing phase γ-NiCrAlTi solid solution, metal sulfide self-lubricating phase CrS and Ti2CS is formed, average micro-
Hardness is 1005HV0.2。
The invention has the advantages that：
1st, the present invention is good to form toughness in wear surface drawout by adding self-lubricating solid agent metal sulfide
Lubrication transfer membrane, make composite coating that there is comprehensive excellent wear resistant friction reducing performance；
2nd, the present invention is by laser melting and coating technique, using the cooperative effect of self-lubricating solid agent in matrix surface in-situ authigenic
The wear-resisting composite coating of high-temperature self-lubrication, solves metal alloy surface wear failure problem, there is provided a kind of inexpensive, efficient portion
Part repair mode, meets the needs of part remanufactures production.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1
The wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, by being that base material, lubrication are mutually to add comprising wear-resisting phase
Agent is added to form；Wherein, the content of wear-resisting phase is 70wt%, and the content for lubricating phase is 30wt%.
Wherein, wear-resisting phase is cermet NiCr/Cr3C2Metal-ceramic composite powder end, by comprising following components and again
Measure the raw material composition of degree：Ni 14wt%, Cr 5wt%, Cr3C281wt%, average grain diameter 10um；Lubricate and be mutually
The self-lubricating solid sulfide WS of layer structure2, purity is not less than 99.9wt%, average grain diameter 0.8um.
The preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, is comprised the steps of：
(1) pretreatment of matrix material：Matrix material is Ti6Al4V sheet alloys, by including following components and weight hundred
The raw material than content is divided to form：Al 6.3wt%, V 4.2wt%, Fe0.11wt%, C 0.03wt%, N 0.03wt%, O
0.15wt%, surplus Ti；Pretreatment includes surface polishing, surface degreasing derusting, and the surface polishing uses 1000 mesh SiC water
Sand paper is polished, and the surface degreasing derusting carries out surface clean and wiping using absolute ethyl alcohol, is then dried for standby；
(2) preparation of preset coating raw material is with mixing：Raw material is weighed according to the wear-resisting phase and lubrication phase percentage by weight,
Using mechanical ball mill process for refining, first by the NiCr/Cr3C2Metal-ceramic composite powder end ball milling 1h, then by the solid certainly
Lubrication sulfide mixing and ball milling 2h obtains composite powder, and the rotational speed of ball-mill is 400r/min, ratio of grinding media to material 2:1；
(3) preparation of preset coating：The composite powder described in step (2) is bonded using methylcellulose and is preset in step
(1) the pretreated matrix surface, naturally dry；Then the drying box insulation 2h heating that temperature is 50 DEG C is put it into remove
It is wet to obtain the preset coating that thickness is 1mm；
(4) laser melting and coating process：Open 10kw high power transverse flows CO2Laser, laser cladding technological parameter is adjusted, in gas
Press under the argon gas protection for 0.5Mpa, laser melting coating is carried out to the preset coating described in step (3), under laser energy irradiation
The wear-resisting composite coating of in-situ authigenic high-temperature self-lubrication；Technological parameter includes：Laser power is 1kW, sweep speed 4mm/s, light
Spot diameter is 3mm, laser energy density 50J/mm3。
It is compound that described step (4) high temperature self-lubricating abrasion-resistant composite coating includes γ-NiCrAlTi/TiC high-temperature wearables
Coating and γ-NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications；γ-the NiCrAlTi/
TiC high-temperature wearables composite coating comprising enhancing phase TiC and toughness reinforcing phase γ-NiCrAlTi solid solution by forming, average microhardness
For 1100HV0.2；γ-the NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications is by including enhancing
Phase TiC and TiWC2, toughness reinforcing phase γ-NiCrAlTi solid solution, metal sulfide self-lubricating phase CrS and Ti2CS is formed, average micro-
Hardness is 1005HV0.2。
Embodiment 2
The wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, by being that base material, lubrication are mutually to add comprising wear-resisting phase
Agent is added to form；Wherein, the content of wear-resisting phase is 90wt%, and the content for lubricating phase is 10wt%.
Wherein, wear-resisting phase is cermet NiCr/Cr3C2Metal-ceramic composite powder end, by comprising following components and again
Measure the raw material composition of degree：Ni 18wt%, Cr 3wt%, Cr3C279wt%, average grain diameter 50um；Lubricate and be mutually
The self-lubricating solid sulfide M oS of layer structure2, purity is not less than 99.9wt%, average grain diameter 2um.
The preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, is comprised the steps of：
(1) pretreatment of matrix material：Matrix material is Ti6Al4V sheet alloys, by including following components and weight hundred
The raw material than content is divided to form：Al 6.3wt%, V 4.2wt%, Fe0.11wt%, C 0.03wt%, N 0.03wt%, O
0.15wt%, surplus Ti；Pretreatment includes surface polishing, surface degreasing derusting, and the surface polishing uses 1000 mesh SiC water
Sand paper is polished, and the surface degreasing derusting carries out surface clean and wiping using absolute ethyl alcohol, is then dried for standby；
(2) preparation of preset coating raw material is with mixing：Raw material is weighed according to the wear-resisting phase and lubrication phase percentage by weight,
Using mechanical ball mill process for refining, first by the NiCr/Cr3C2Metal-ceramic composite powder end ball milling 3h, then by the solid certainly
Lubrication sulfide mixing and ball milling 4h obtains composite powder, and the rotational speed of ball-mill is 600r/min, ratio of grinding media to material 4:1；
(3) preparation of preset coating：The composite powder described in step (2) is bonded using methylcellulose and is preset in step
(1) the pretreated matrix surface, naturally dry；Then the drying box insulation 3h heating that temperature is 60 DEG C is put it into remove
It is wet to obtain the preset coating that thickness is 3mm；
(4) laser melting and coating process：Open 10kw high power transverse flows CO2Laser, laser cladding technological parameter is adjusted, in gas
Press under the argon gas protection for 1.0Mpa, laser melting coating is carried out to the preset coating described in step (3), under laser energy irradiation
The wear-resisting composite coating of in-situ authigenic high-temperature self-lubrication；Technological parameter includes：Laser power is 4kW, sweep speed 8mm/s, light
Spot diameter is 6mm, laser energy density 200J/mm3。
It is compound that described step (4) high temperature self-lubricating abrasion-resistant composite coating includes γ-NiCrAlTi/TiC high-temperature wearables
Coating and γ-NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications；γ-the NiCrAlTi/
TiC high-temperature wearables composite coating comprising enhancing phase TiC and toughness reinforcing phase γ-NiCrAlTi solid solution by forming, average microhardness
For 1100HV0.2；γ-the NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications is by including enhancing
Phase TiC and TiWC2, toughness reinforcing phase γ-NiCrAlTi solid solution, metal sulfide self-lubricating phase CrS and Ti2CS is formed, average micro-
Hardness is 1005HV0.2。
Embodiment 3
The wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, by being that base material, lubrication are mutually to add comprising wear-resisting phase
Agent is added to form；Wherein, the content of wear-resisting phase is 80wt%, and the content for lubricating phase is 20wt%.
Wherein, wear-resisting phase is cermet NiCr/Cr3C2Metal-ceramic composite powder end, by comprising following components and again
Measure the raw material composition of degree：Ni 16wt%, Cr4wt%, Cr3C280wt%, average grain diameter 25um；Lubrication is mutually layer
The self-lubricating solid sulfide FeS of shape structure, purity are not less than 99.9wt%, average grain diameter 1um.
The preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, is comprised the steps of：
(1) pretreatment of matrix material：Matrix material is Ti6Al4V sheet alloys, by including following components and weight hundred
The raw material than content is divided to form：Al 6.3wt%, V 4.2wt%, Fe0.11wt%, C 0.03wt%, N 0.03wt%, O
0.15wt%, surplus Ti；Pretreatment includes surface polishing, surface degreasing derusting, and the surface polishing uses 1000 mesh SiC water
Sand paper is polished, and the surface degreasing derusting carries out surface clean and wiping using absolute ethyl alcohol, is then dried for standby；
(2) preparation of preset coating raw material is with mixing：Raw material is weighed according to the wear-resisting phase and lubrication phase percentage by weight,
Using mechanical ball mill process for refining, first by the NiCr/Cr3C2Metal-ceramic composite powder end ball milling 2h, then by the solid certainly
Lubrication sulfide mixing and ball milling 3h obtains composite powder, and the rotational speed of ball-mill is 500r/min, ratio of grinding media to material 3:1；
(3) preparation of preset coating：The composite powder described in step (2) is bonded using methylcellulose and is preset in step
(1) the pretreated matrix surface, naturally dry；Then put it into the drying box that temperature is 55 DEG C and be incubated 2.5h heating
Dehumidify thickness be 2mm preset coating；
(4) laser melting and coating process：Open 10kw high power transverse flows CO2Laser, laser cladding technological parameter is adjusted, in gas
Press under the argon gas protection for 0.8Mpa, laser melting coating is carried out to the preset coating described in step (3), under laser energy irradiation
The wear-resisting composite coating of in-situ authigenic high-temperature self-lubrication；Technological parameter includes：Laser power is 2kW, sweep speed 6mm/s, light
Spot diameter is 4mm, laser energy density 100J/mm3。
It is compound that described step (4) high temperature self-lubricating abrasion-resistant composite coating includes γ-NiCrAlTi/TiC high-temperature wearables
Coating and γ-NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications；γ-the NiCrAlTi/
TiC high-temperature wearables composite coating comprising enhancing phase TiC and toughness reinforcing phase γ-NiCrAlTi solid solution by forming, average microhardness
For 1100HV0.2；γ-the NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications is by including enhancing
Phase TiC and TiWC2, toughness reinforcing phase γ-NiCrAlTi solid solution, metal sulfide self-lubricating phase CrS and Ti2CS is formed, average micro-
Hardness is 1005HV0.2。
Embodiment 4
The wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, by being that base material, lubrication are mutually to add comprising wear-resisting phase
Agent is added to form；Wherein, the content of wear-resisting phase is 88wt%, and the content for lubricating phase is 15wt%.
Wherein, wear-resisting phase is cermet NiCr/Cr3C2Metal-ceramic composite powder end, by comprising following components and again
Measure the raw material composition of degree：Ni 16wt%, Cr4wt%, Cr3C280wt%, average grain diameter 25um；Lubrication is mutually layer
The self-lubricating solid sulfide WS of shape structure2And MoS2Mixture, purity is not less than 99.9wt%, average grain diameter 1.0um.
The preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, is comprised the steps of：
(1) pretreatment of matrix material：Matrix material is Ti6Al4V sheet alloys, by including following components and weight hundred
The raw material than content is divided to form：Al 6.3wt%, V 4.2wt%, Fe0.11wt%, C 0.03wt%, N 0.03wt%, O
0.15wt%, surplus Ti；Pretreatment includes surface polishing, surface degreasing derusting, and the surface polishing uses 1000 mesh SiC water
Sand paper is polished, and the surface degreasing derusting carries out surface clean and wiping using absolute ethyl alcohol, is then dried for standby；
(2) preparation of preset coating raw material is with mixing：Raw material is weighed according to the wear-resisting phase and lubrication phase percentage by weight,
Using mechanical ball mill process for refining, first by the NiCr/Cr3C2Metal-ceramic composite powder end ball milling 2h, then by the solid certainly
Lubrication sulfide mixing and ball milling 4h obtains composite powder, and the rotational speed of ball-mill is 500r/min, ratio of grinding media to material 3:1；
(3) preparation of preset coating：The composite powder described in step (2) is bonded using methylcellulose and is preset in step
(1) the pretreated matrix surface, naturally dry；Then the drying box insulation 3h heating that temperature is 55 DEG C is put it into remove
It is wet to obtain the preset coating that thickness is 1.5mm；
(4) laser melting and coating process：Open 10kw high power transverse flows CO2Laser, laser cladding technological parameter is adjusted, in gas
Press under the argon gas protection for 0.5Mpa, laser melting coating is carried out to the preset coating described in step (3), under laser energy irradiation
The wear-resisting composite coating of in-situ authigenic high-temperature self-lubrication；Technological parameter includes：Laser power is 2kW, sweep speed 4mm/s, light
Spot diameter is 3mm, laser energy density 150J/mm3。
It is compound that described step (4) high temperature self-lubricating abrasion-resistant composite coating includes γ-NiCrAlTi/TiC high-temperature wearables
Coating and γ-NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications；γ-the NiCrAlTi/
TiC high-temperature wearables composite coating comprising enhancing phase TiC and toughness reinforcing phase γ-NiCrAlTi solid solution by forming, average microhardness
For 1100HV0.2；γ-the NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications is by including enhancing
Phase TiC and TiWC2, toughness reinforcing phase γ-NiCrAlTi solid solution, metal sulfide self-lubricating phase CrS and Ti2CS is formed, average micro-
Hardness is 1005HV0.2。
Embodiment 5
The wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, by being that base material, lubrication are mutually to add comprising wear-resisting phase
Agent is added to form；Wherein, the content of wear-resisting phase is 70-90wt%, and the content for lubricating phase is 10-30wt%.
Wherein, wear-resisting phase is cermet NiCr/Cr3C2Metal-ceramic composite powder end, by comprising following components and again
Measure the raw material composition of degree：Ni 16wt%, Cr4wt%, Cr3C280wt%, average grain diameter 25um；Lubrication is mutually layer
The self-lubricating solid sulfide WS of shape structure2、MoS2With FeS mixture, purity is not less than 99.9wt%, and average grain diameter is
1.0um。
The preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, is comprised the steps of：
(1) pretreatment of matrix material：Matrix material is Ti6Al4V sheet alloys, by including following components and weight hundred
The raw material than content is divided to form：Al 6.3wt%, V 4.2wt%, Fe0.11wt%, C 0.03wt%, N 0.03wt%, O
0.15wt%, surplus Ti；Pretreatment includes surface polishing, surface degreasing derusting, and the surface polishing uses 1000 mesh SiC water
Sand paper is polished, and the surface degreasing derusting carries out surface clean and wiping using absolute ethyl alcohol, is then dried for standby；
(2) preparation of preset coating raw material is with mixing：Raw material is weighed according to the wear-resisting phase and lubrication phase percentage by weight,
Using mechanical ball mill process for refining, first by the NiCr/Cr3C2Metal-ceramic composite powder end ball milling 1h, then by the solid certainly
Lubrication sulfide mixing and ball milling 2h obtains composite powder, and the rotational speed of ball-mill is 600r/min, ratio of grinding media to material 4:1；
(3) preparation of preset coating：The composite powder described in step (2) is bonded using methylcellulose and is preset in step
(1) the pretreated matrix surface, naturally dry；Then the drying box insulation 2h heating that temperature is 60 DEG C is put it into remove
It is wet to obtain the preset coating that thickness is 3mm；
(4) laser melting and coating process：Open 10kw high power transverse flows CO2Laser, laser cladding technological parameter is adjusted, in gas
Press under the argon gas protection for 1.0Mpa, laser melting coating is carried out to the preset coating described in step (3), under laser energy irradiation
The wear-resisting composite coating of in-situ authigenic high-temperature self-lubrication；Technological parameter includes：Laser power is 4kW, sweep speed 8mm/s, light
Spot diameter is 6mm, laser energy density 200J/mm3。
It is compound that described step (4) high temperature self-lubricating abrasion-resistant composite coating includes γ-NiCrAlTi/TiC high-temperature wearables
Coating and γ-NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications；γ-the NiCrAlTi/
TiC high-temperature wearables composite coating comprising enhancing phase TiC and toughness reinforcing phase γ-NiCrAlTi solid solution by forming, average microhardness
For 1100HV0.2；γ-the NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications is by including enhancing
Phase TiC and TiWC2, toughness reinforcing phase γ-NiCrAlTi solid solution, metal sulfide self-lubricating phase CrS and Ti2CS is formed, average micro-
Hardness is 1005HV0.2。
Tested by the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of the Laser Cladding in-situ prepared to above-described embodiment
Experiment understands that the hardness with the increase cladding layer of lubrication phase has declined, and coefficient of friction is gradually reduced, and abrasion takes the lead in after increasing
Subtract, when self-lubricating solid sulfide is 13-15wt%, frictional behaviour is preferable；From room temperature under the conditions of 600 DEG C, due to enhancing
Phase TiC, TiWC2With self-lubricating phase CrS, Ti2CS comprehensive effect, laser melting coating γ-NiCrAlTi/TiC+TiWC2/CrS+
Ti2The coefficient of friction and wear rate of CS composite coatings reduce than matrix material Ti6Al4V alloys, illustrate that coating has well
Self-lubricating abrasion-resistant performance.
Although above with general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to the scope of protection of present invention.
Claims (10)
1. the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ, it is characterised in that by being base material, profit comprising wear-resisting phase
It is sliding mutually to be formed for additive；Wherein, the content of wear-resisting phase is 70-90wt%, and the content for lubricating phase is 10-30wt%.
2. the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ according to claim 1, it is characterised in that institute
The wear-resisting phase stated is cermet, and described cermet is NiCr/Cr3C2Metal-ceramic composite powder end.
3. the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ according to claim 2, it is characterised in that institute
The NiCr/Cr stated3C2Metal-ceramic composite powder end is made up of the raw material comprising following components and weight percent content：Ni 14-
18wt%, Cr 3-5wt%, Cr3C279-81wt%, average grain diameter 10-50um.
4. the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ according to claim 1, it is characterised in that institute
The lubrication stated is mutually the self-lubricating solid sulfide of layer structure, and purity is not less than 99.9wt%, average grain diameter 0.8-2um.
5. the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ according to claim 4, it is characterised in that institute
The self-lubricating solid sulfide stated includes WS2、MoS2, one or both of FeS combination of the above.
6. the preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ according to claim 1, its
It is characterised by, methods described comprises the steps of：
(1) pretreatment of matrix material：Matrix material is Ti6Al4V sheet alloys, and pretreatment includes surface polishing, surface degreasing
Derusting, the surface polishing use 1000 mesh SiC liquid honings, and the surface degreasing derusting carries out surface using absolute ethyl alcohol
Cleaning and wiping, are then dried for standby；
(2) preparation of preset coating raw material is with mixing：Raw material is weighed according to the wear-resisting phase and lubrication phase percentage by weight, is used
Mechanical ball mill process for refining, first by the NiCr/Cr3C2Metal-ceramic composite powder end ball milling 1-3h, then the solid is moistened certainly
Sliding sulfide mixing and ball milling 2-4h obtains composite powder, and the rotational speed of ball-mill is 400-600r/min, ratio of grinding media to material 2-4:1；
(3) preparation of preset coating：The composite powder described in step (2) is bonded using methylcellulose and is preset in step (1)
The pretreated matrix surface, naturally dry；Then put it into the drying box that temperature is 50-60 DEG C and be incubated 2-3h heating
Dehumidify thickness be 1-3mm preset coating；
(4) laser melting and coating process：Laser is opened, laser cladding technological parameter is adjusted, in the case where protecting gas shielded, to step (3)
Described in preset coating carry out laser melting coating, laser energy irradiation under the wear-resisting composite coating of in-situ authigenic high-temperature self-lubrication.
7. the preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ according to claim 6, its
It is characterised by, the Ti6Al4V sheet alloys described in step (1) are by including the raw material group of following components and weight percent content
Into：Al 6.3wt%, V 4.2wt%, Fe0.11wt%, C 0.03wt%, N 0.03wt%, O 0.15wt%, surplus Ti.
8. the preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ according to claim 6, its
It is characterised by, laser is 10kw high power transverse flows CO in described step (4)2Laser.
9. the preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ according to claim 6, its
It is characterised by, technological parameter includes in described step (4)：The protection gas is argon gas, and protection air pressure is 0.5-1.0Mpa, is swashed
Luminous power is 1-4kW, sweep speed 4-8mm/s, spot diameter 3-6mm, laser energy density 50-200J/mm3。
10. the preparation method of the wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ according to claim 6, its
It is characterised by, it is compound that described step (4) high temperature self-lubricating abrasion-resistant composite coating includes γ-NiCrAlTi/TiC high-temperature wearables
Coating and γ-NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications；γ-the NiCrAlTi/
TiC high-temperature wearables composite coating comprising enhancing phase TiC and toughness reinforcing phase γ-NiCrAlTi solid solution by forming, average microhardness
For 1100HV0.2；γ-the NiCrAlTi/TiC+TiWC2/Ti2The wear-resisting composite coating of CS+CrS high-temperature self-lubrications is by including enhancing
Phase TiC and TiWC2, toughness reinforcing phase γ-NiCrAlTi solid solution, metal sulfide self-lubricating phase CrS and Ti2CS is formed, average micro-
Hardness is 1005HV0.2。
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| CN109183027A (en) * | 2018-10-26 | 2019-01-11 | 江苏理工学院 | A kind of self-lubricating solid wear-resistant corrosion-resistant composite coating and preparation method thereof |
| CN109604620A (en) * | 2018-12-11 | 2019-04-12 | 安阳工学院 | A kind of NiTiCr-MgLiZn composite material and preparation method with self regulating and control function |
| CN111074192A (en) * | 2019-12-10 | 2020-04-28 | 常州大学 | Ni bag MoS2Self-lubricating Cr3C2Preparation method of NiCr coating |
| CN112144056A (en) * | 2020-08-28 | 2020-12-29 | 西安交通大学 | Nickel-based composite coating applied to austenitic stainless steel and preparation method thereof |
| CN114059063A (en) * | 2021-11-05 | 2022-02-18 | 徐州万达回转支承有限公司 | Wear-resistant coating applied to tooth surface of worm wheel of rotary driving worm and preparation method thereof |
| CN114231970A (en) * | 2021-12-02 | 2022-03-25 | 中原工学院 | Wide-temperature-range self-lubricating composite coating and preparation process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109183027A (en) * | 2018-10-26 | 2019-01-11 | 江苏理工学院 | A kind of self-lubricating solid wear-resistant corrosion-resistant composite coating and preparation method thereof |
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| CN112144056A (en) * | 2020-08-28 | 2020-12-29 | 西安交通大学 | Nickel-based composite coating applied to austenitic stainless steel and preparation method thereof |
| CN114059063A (en) * | 2021-11-05 | 2022-02-18 | 徐州万达回转支承有限公司 | Wear-resistant coating applied to tooth surface of worm wheel of rotary driving worm and preparation method thereof |
| CN114231970A (en) * | 2021-12-02 | 2022-03-25 | 中原工学院 | Wide-temperature-range self-lubricating composite coating and preparation process thereof |
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Application publication date: 20171110 |