CN112342542A - Method for ultrahigh-speed laser cladding of 316L coating of 45 steel part - Google Patents
Method for ultrahigh-speed laser cladding of 316L coating of 45 steel part Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 80
- 239000010959 steel Substances 0.000 title claims abstract description 80
- 238000000576 coating method Methods 0.000 title claims abstract description 78
- 239000011248 coating agent Substances 0.000 title claims abstract description 77
- 238000004372 laser cladding Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 65
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 23
- 239000010935 stainless steel Substances 0.000 claims abstract description 23
- 238000005498 polishing Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 14
- 244000137852 Petrea volubilis Species 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
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- 239000000758 substrate Substances 0.000 description 9
- 230000001681 protective effect Effects 0.000 description 6
- 239000011651 chromium Substances 0.000 description 5
- 238000005253 cladding Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910017060 Fe Cr Inorganic materials 0.000 description 2
- 229910002544 Fe-Cr Inorganic materials 0.000 description 2
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- 238000002441 X-ray diffraction Methods 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 2
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- RYZCLUQMCYZBJQ-UHFFFAOYSA-H lead(2+);dicarbonate;dihydroxide Chemical compound [OH-].[OH-].[Pb+2].[Pb+2].[Pb+2].[O-]C([O-])=O.[O-]C([O-])=O RYZCLUQMCYZBJQ-UHFFFAOYSA-H 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 239000011780 sodium chloride Substances 0.000 description 1
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- 238000004506 ultrasonic cleaning Methods 0.000 description 1
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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
- C23C24/106—Coating with metal alloys or metal elements only
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Laser Beam Processing (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a method for ultrahigh-speed laser cladding of 316L coating on a 45 steel part, which comprises the steps of S1, preprocessing the 45 steel part and 316L stainless steel powder; s2, fixing the pretreated 45 steel part in a coordinate system of equipment by adopting a clamp; s3, setting the scanning path, the scanning area shape and the size of the 45 steel part; s4, introducing 316L stainless steel powder into a laser powder feeder, and carrying out ultra-high-speed laser cladding on the 45 steel part according to the scanning path, the shape and the size of a scanning area to form a 316L coating; and S5, polishing the formed 316L coating. The 316L coating prepared by performing ultrahigh-speed laser cladding on the key position of the 45 steel part has the advantages of high surface flatness, no crack and hole defects, fine crystal grains, uniform thickness, good metallurgical bonding with a matrix, high hardness, good wear resistance, good corrosion resistance, short process period and less material waste.
Description
Technical Field
The invention belongs to the technical field of steel coatings, and particularly relates to a method for ultrahigh-speed laser cladding of a 316L coating on a 45 steel part.
Background
45 steel has good comprehensive mechanical properties, so the steel is widely applied to the field of machinery. However, 45 steel has poor corrosion resistance and is prone to rusting, resulting in material damage or failure. At present, parts are generally protected integrally by adopting modes such as chromium plating, zinc plating and the like. With the development of modern industry, personalized requirements are more and more outstanding, certain special environments only need to carry out anti-oxidation protection on parts at special positions, and the precision of processes such as chromium plating and zinc plating cannot meet the requirements.
At present, one of the research focuses of the researchers is to apply the laser cladding technology to the material protection. However, the laser cladding technology has low powder utilization rate, low overall processing efficiency and low precision of the coating and parts thereof, so that the coating cost is high, and the large-scale popularization and application of the coating are restricted.
Disclosure of Invention
The invention aims to solve or improve the problems by providing a method for ultrahigh-speed laser cladding 316L coating of 45 steel parts aiming at the defects in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for ultrahigh-speed laser cladding of 316L coating on 45 steel parts comprises the following steps:
s1, pretreating the 45 steel parts and 316L stainless steel powder;
s2, fixing the pretreated 45 steel part in a coordinate system of equipment by adopting a clamp;
s3, setting the scanning path, the scanning area shape and the size of the 45 steel part;
s4, introducing 316L stainless steel powder into a laser powder feeder, and carrying out ultra-high-speed laser cladding on the 45 steel part according to the scanning path, the shape and the size of a scanning area to form a 316L coating;
and S5, polishing the formed 316L coating.
Preferably, the 45 steel part is pretreated in S1, including:
and (3) derusting the 45 steel part by using 100-1000-mesh sand paper or milling, putting the 45 steel part into ultrasonic waves, cleaning the 45 steel part by using alcohol for 2-30 min, and drying the 45 steel part.
Preferably, the 316L stainless steel powder is pretreated in S1, comprising:
putting 316L stainless steel powder with the particle size of 10-200 mu m into a drying oven for drying at the temperature of 40-120 ℃ for 0.5-10 h.
Preferably, in S4, molten 316L powder is fed into the molten pool by means of coaxial powder feeding, and the molten 316L powder is naturally cooled and solidified to form a 316L coating.
Preferably, the laser power in S4 is 0.1-1.5 kW, the scanning linear velocity is 340-900 mm/S, the spot diameter is 0.3-1.0 mm, the defocusing amount is 0.5-3 mm, the powder conveying amount is 2-20 g/S, and the lap joint rate is 30-90%.
Preferably, the powder feeding gas and the protective gas are argon.
The method for ultrahigh-speed laser cladding of 316L coating on 45 steel part provided by the invention has the following beneficial effects:
the 316L coating prepared by ultrahigh-speed laser cladding on the key position of the 45 steel part by adopting the process method has the advantages of high surface flatness, no crack and hole defects, fine crystal grains, uniform thickness, good metallurgical bonding with a matrix, high hardness, good wear resistance, good corrosion resistance, short process period and less material waste.
Drawings
Fig. 1 shows the macro morphology of ultra high speed laser cladding 316L coating of example 2 of ultra high speed laser cladding 316L coating of 45 steel parts.
Fig. 2 shows the microstructure of the ultra high speed laser cladding 316L coating of example 2 of the ultra high speed laser cladding 316L coating of the 45 steel part.
Fig. 3 is EDS analysis of ultra high speed laser cladding 316L coating of example 2 of 45 steel part ultra high speed laser cladding 316L coating.
FIG. 4 is an XRD analysis of ultra high speed laser cladding 316L coating of example 2 of ultra high speed laser cladding 316L coating of 45 steel parts.
FIG. 5 is a microhardness profile of ultra high speed laser cladding 316L coating of example 2 of 45 steel part ultra high speed laser cladding 316L coating.
FIG. 6 shows the wear profile of the ultra-high speed laser cladding 316L coating of example 2 of the ultra-high speed laser cladding 316L coating of the 45 steel part.
FIG. 7 shows the erosion profile of the ultra-high speed laser cladding 316L coating of example 2 of the ultra-high speed laser cladding 316L coating of the 45 steel part.
FIG. 8 shows the macro morphology of ultra high speed laser cladding 316L coating of example 3 of ultra high speed laser cladding 316L coating of 45 steel parts.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
According to the embodiment 1 of the application, the method for ultrahigh-speed laser cladding of 316L coating on 45 steel parts comprises the following steps:
s1, pretreating the 45 steel part and 316L stainless steel powder, wherein the pretreatment method specifically comprises the following steps:
and (3) derusting the specific position of the 45 steel part by using a method of 100-1000-mesh sand paper or milling and the like, putting the 45 steel part into ultrasonic waves, cleaning the 45 steel part for 2-30 min by using alcohol, and drying the 45 steel part by using a hair dryer.
316L stainless steel powder with the granularity of 10-200 mu m is selected as the ultrahigh-speed cladding material, and the powder is dried in a drying oven at the drying temperature of 40-120 ℃ for 0.5-10 h.
S2, fixing the pretreated 45 steel part in a coordinate system of equipment by adopting a clamp;
and S3, setting the scanning path, the scanning area shape and the scanning area size of the 45 steel part.
Wherein the scanning area is within 50-170 mm from the shaft end. The scanning area is preferably within 50-80 mm, 50-83 mm, 120-155 mm or 100-170 mm from the shaft end.
And S4, introducing 316L stainless steel powder into a laser powder feeder, and carrying out ultra-high-speed laser cladding on the 45 steel part according to the scanning path, the shape and the size of the scanning area to form a 316L coating.
And (3) sending the molten 316L powder into a molten pool by adopting a coaxial powder feeding mode, and naturally cooling and solidifying.
The laser power is 0.1-1.5 kW, the scanning linear velocity is 340-900 mm/s, the spot diameter is 0.3-1.0 mm, the defocusing amount is 0.5-3 mm, the powder conveying amount is 2-20 g/s, the lap joint rate is 30-90%, and argon is used as the powder conveying gas and the protective gas.
And S5, polishing the formed 316L coating to obtain the 316L coating meeting the requirement.
According to embodiment 2 of the present application, it comprises:
a1, the experimental substrate is a 45-steel shaft with the diameter of 30mm and the length of 300mm, the rust removal is carried out by sand paper with 400 and 800 meshes, the sand paper is placed in ultrasonic waves and cleaned by alcohol for 10min, and the sand paper is dried by a hair drier.
The ultrahigh-speed cladding material is commercial 316L stainless steel powder with the granularity of 20-53 mu m, and the powder is dried in a drying oven at the temperature of 80 ℃ for 8 hours.
And A2, fixing the processed 45 steel part in the coordinate system of the equipment by using a special fixture.
A3, setting a scanning area to be within 100-170 mm from the shaft end by a computer, and obtaining the linear velocity by utilizing the high-speed rotation of the shaft.
A4, pouring the treated 316L stainless steel powder into a laser powder feeder, and carrying out ultra-high speed laser cladding on the designated position of the 45 steel part to form a 316L coating.
And (3) sending the molten 316L powder into a molten pool by adopting a coaxial powder feeding mode, and naturally cooling and solidifying.
Wherein, the laser power is 450W, the scanning linear velocity is 340mm/s, the spot diameter is 0.8mm, the defocusing amount is 2mm, the powder feeding amount is 8.6g/s, the lap joint rate is 70%, and the powder feeding gas and the protective gas are Ar gas (the purity is more than 99.9%).
Fig. 1 shows the macro morphology of the ultra-high-speed laser cladding 316L coating, and it can be seen that the surface of the 316L coating has high flatness, no cracks or holes, and silver-white color.
The microstructure of the coating is observed by using a Hitachi SU model 3500 Scanning Electron Microscope (SEM) and a 4XB optical metallographic microscope (OM), and as shown in the figure 2, the microstructure of the ultra-high-speed laser cladding 316L coating is shown, so that the joint of the coating and the matrix has no crack, and the combination of the two is good for 2. The thickness of the 316L coating is about 202 mu m, the thickness is uniform, the crystal grain size is gradually reduced from the bottom to the top of the molten pool, and the coating has no defects such as holes and the like.
Elemental analysis was performed using an energy spectrometer (EDS) attached to a hiti SU3500 scanning electron microscope, and the analysis results are shown in fig. 3, where the scanning direction is the AB direction. As is clear from the figure, the Cr content gradually decreased and the Fe content gradually increased from the surface layer to the depth of the molten pool. At the joint of the coating and the substrate, Cr and Fe elements do not undergo sudden change, which shows that the coating and the substrate diffuse mutually to form good metallurgical bonding.
Phase analysis was performed with an X' Pert PRO type X-ray diffractometer (XRD), Cu target radiation (λ 0.154056nm), theta-theta scan pattern, scan range 10-90 °, scan speed 8 °/min, tube pressure 40kV, tube flow 40 mA.
FIG. 4 shows the results of XRD analysis, the phase of the 316L coating is composed of (Fe-Cr) stainless steel, Cr0.19Fe0.7Ni0.11, Fe63Mo 37.
The microhardness of the coating was measured using an automatic turret Vickers hardness tester model HV-1000A, with a load of 0.5kgf and a load retention time of 10 s.
FIG. 5 is a microhardness distribution of the 316L coating in the depth direction of the molten pool, and the average hardness (634.12HV) of the 316L coating is 3.07 times the average hardness (206.43HV) of the 45 steel substrate.
The abrasion resistance of the coating is detected by adopting a modified MPD-1A type friction abrasion tester, a grinding disc is made of aluminum oxide, the roughness Ra is 13 mu m, the rotating speed is 200r/min, the load is 4.2N, a sample is placed into alcohol for ultrasonic cleaning for 5min before and after the experiment, the mass of the sample before and after abrasion is weighed by using an LQ10001A type electronic balance with the precision of 0.1mg after drying, and the abrasion weight loss rate is calculated.
FIG. 6 is an abrasion profile of the 316L coating. Furrows are small, and the abrasion mechanism is abrasive wear. The abrasion weight loss ratio of the 316L coating is 66.32mg/cm2And the abrasion weight loss rate of 45 steel is 97.25mg/cm2. The wear resistance of the 45 steel subjected to the ultrahigh-speed laser cladding treatment is improved to a certain extent.
Soaking in 3.5% NaCl solution for 168h, wherein the average ambient temperature is 28 ℃, and the corrosion resistance of the coating is measured according to weight loss/area.
FIG. 7 shows the erosion profile of the 316L coating. The corrosion weight loss ratio of the 316L coating is 0.288mg/cm2And the corrosion weight loss rate of 45 steel is 4.125mg/cm2. The corrosion resistance of the 45 steel subjected to the ultrahigh-speed laser cladding treatment is greatly improved.
According to embodiment 3 of the present application, it comprises:
b1, the experimental substrate is a 45-steel shaft with the diameter of 20mm and the length of 300mm, the rust removal is carried out by sand paper with 400 and 600 meshes, the sand paper is placed in ultrasonic waves and cleaned by alcohol for 20min, and the sand paper is dried by a hair drier.
The ultrahigh-speed cladding material is 316L stainless steel powder with the granularity of 20-53 mu m, and the powder is dried in a drying oven at the temperature of 100 ℃ for 6 hours.
And B2, fixing the processed 45 steel part in the coordinate system of the equipment by using a special fixture.
B3, setting the scanning area to be within 50-83 mm from the shaft end by using a computer, and obtaining the linear velocity by utilizing the high-speed rotation of the shaft.
And B4, pouring the treated 316L stainless steel powder into a laser powder feeder, and carrying out ultra-high-speed laser cladding on the specified position of the 45 steel part to form a 316L coating.
And (3) sending the molten 316L powder into a molten pool by adopting a coaxial powder feeding mode, and naturally cooling and solidifying.
The laser power is 500W, the scanning linear velocity is 400mm/s, the spot diameter is 0.8mm, the defocusing amount is 2mm, the powder feeding amount is 8.6g/s, the lap joint rate is 50%, and the powder feeding gas and the protective gas are Ar gas (the purity is more than 99.9%) in a single layer.
FIG. 8 shows the macro-morphology of the ultra-high speed laser cladding 316L coating in example 3 of the present invention.
According to embodiment 4 of the present application, it comprises:
c1, the experimental base material is a 45-steel shaft with the diameter of 30mm and the length of 300mm, the rust removal is carried out by sand paper with 400 and 800 meshes, the mixture is placed in ultrasonic waves and cleaned by alcohol for 15min, and the mixture is dried by a hair dryer.
The ultrahigh-speed cladding material is 316L stainless steel powder with the granularity of 20-53 mu m, and the powder is dried in a drying oven at the temperature of 80 ℃ for 8 hours.
And C2, fixing the processed 45 steel part in a coordinate system by using a special fixture.
And C3, setting a scanning area to be within 50-80 mm from the shaft end by using a computer, and obtaining the linear velocity by using the high-speed rotation of the shaft.
And C4, pouring the treated 316L stainless steel powder into a laser powder feeder, and carrying out ultra-high speed laser cladding on the specified position of the 45 steel part to form a 316L coating.
And (3) sending the molten 316L powder into a molten pool by adopting a coaxial powder feeding mode, and naturally cooling and solidifying.
The laser power is 600W, the scanning linear velocity is 500mm/s, the spot diameter is 0.8mm, the defocusing amount is 2mm, the powder feeding amount is 8.6g/s, the lap joint rate is 70%, and the powder feeding gas and the protective gas are Ar gas (the purity is more than 99.9%) in a single layer.
According to embodiment 5 of the present application, it comprises:
d1, the experimental substrate is a 45-steel shaft with the diameter of 20mm and the length of 300mm, the rust removal is carried out by sand paper with 400 and 600 meshes, the sand paper is placed in ultrasonic waves and cleaned by alcohol for 20min, and the sand paper is dried by a hair dryer.
The ultrahigh-speed cladding material is 316L stainless steel powder with the granularity of 20-53 mu m, and the powder is dried in a drying oven at the temperature of 90 ℃ for 7 hours.
D2, fixing the processed 45 steel part in the coordinate system of the equipment by using a special fixture.
And C3, setting a scanning area to be within 120-155 mm from the shaft end by using a computer, and obtaining the linear velocity by using the high-speed rotation of the shaft.
D4, pouring the treated 316L stainless steel powder into a laser powder feeder, and carrying out ultra-high speed laser cladding on the designated position of the 45 steel part to form a 316L coating.
And (3) sending the molten 316L powder into a molten pool by adopting a coaxial powder feeding mode, and naturally cooling and solidifying.
The laser power is 700W, the scanning linear velocity is 520mm/s, the spot diameter is 0.8mm, the defocusing amount is 2mm, the powder feeding amount is 8.6g/s, the lap joint rate is 60%, and the powder feeding gas and the protective gas are Ar gas (the purity is more than 99.9%) in a single layer.
Compared with the prior art, the invention has substantial characteristics and remarkable progress, and concretely comprises the following steps;
(1) the surface of the 316L coating has high flatness, no defects such as cracks and holes, and silver white color. The thickness of the 316L coating is about 202 μm, the thickness is uniform, and the crystal grains are fine.
(2) The joint of the coating and the substrate has no cracks, and the coating and the substrate form good combination.
(3) The phase is made of (Fe-Cr) stainless steel, Cr0.19Fe0.7Ni0.11、Fe63Mo37And (4) the components are combined together.
(4) The average hardness (634.12HV) of the 316L coating was 3.07 times the average hardness (206.43HV) of the 45 steel substrate.
(5) The abrasion weight loss ratio of the 316L coating is 66.32mg/cm2And the abrasion weight loss rate of 45 steel is 97.25mg/cm2. The wear resistance of the 45 steel subjected to the ultrahigh-speed laser cladding treatment is improved to a certain extent.
(6) The corrosion weight loss ratio of the 316L coating is 0.288mg/cm2And the corrosion weight loss rate of 45 steel is 4.125mg/cm2. The corrosion resistance of the 45 steel subjected to the ultrahigh-speed laser cladding treatment is greatly improved.
(7) The process cycle is short, and the material waste is less.
While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (6)
1. A method for ultrahigh-speed laser cladding of 316L coating on 45 steel parts is characterized by comprising the following steps:
s1, pretreating the 45 steel parts and 316L stainless steel powder;
s2, fixing the pretreated 45 steel part in a coordinate system of equipment by adopting a clamp;
s3, setting the scanning path, the scanning area shape and the size of the 45 steel part;
s4, introducing 316L stainless steel powder into a laser powder feeder, and carrying out ultra-high-speed laser cladding on the 45 steel part according to the scanning path, the shape and the size of a scanning area to form a 316L coating;
and S5, polishing the formed 316L coating.
2. The method for ultra high speed laser cladding 316L coating of 45 steel parts according to claim 1, wherein the pretreatment of 45 steel parts in S1 comprises:
and (3) derusting the 45 steel part by using 100-1000-mesh sand paper or milling, putting the 45 steel part into ultrasonic waves, cleaning the 45 steel part by using alcohol for 2-30 min, and drying the 45 steel part.
3. The method for ultrahigh-speed laser cladding of 316L coating on 45 steel parts according to claim 1, wherein the pretreatment of 316L stainless steel powder in S1 comprises:
putting 316L stainless steel powder with the particle size of 10-200 mu m into a drying oven for drying at the temperature of 40-120 ℃ for 0.5-10 h.
4. The method for ultrahigh-speed laser cladding of 316L coating on 45 steel parts according to claim 1, wherein in S4, molten 316L powder is fed into a molten pool in a coaxial powder feeding mode, and the molten 316L powder is naturally cooled and solidified to form 316L coating.
5. The method for ultrahigh-speed laser cladding of 316L coating on 45 steel parts according to claim 1, wherein in S4, the laser power is 0.1-1.5 kW, the scanning linear speed is 340-900 mm/S, the spot diameter is 0.3-1.0 mm, the defocusing amount is 0.5-3 mm, the powder feeding amount is 2-20 g/S, and the overlapping rate is 30-90%.
6. The method for ultra high speed laser cladding of 316L coating on 45 steel parts according to claim 5, wherein the powder feeding gas and the shielding gas are argon.
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| CN115029693A (en) * | 2022-04-25 | 2022-09-09 | 宁波大学 | Method for preparing silver coating by using ultra-high-speed laser cladding technology and product thereof |
| CN115044904A (en) * | 2022-07-05 | 2022-09-13 | 长沙理工大学 | Additive manufacturing method of high-strength high-work-hardening stainless steel |
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| CN115466953A (en) * | 2022-10-11 | 2022-12-13 | 郑煤机智鼎液压有限公司 | Laser cladding layer thickness detection method |
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