CN111962060A - Manufacturing method of surface high-speed laser cladding passenger special line railway turnout sliding type bedplate - Google Patents
Manufacturing method of surface high-speed laser cladding passenger special line railway turnout sliding type bedplate Download PDFInfo
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- CN111962060A CN111962060A CN201910417410.9A CN201910417410A CN111962060A CN 111962060 A CN111962060 A CN 111962060A CN 201910417410 A CN201910417410 A CN 201910417410A CN 111962060 A CN111962060 A CN 111962060A
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- 238000004372 laser cladding Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 49
- 239000000956 alloy Substances 0.000 claims abstract description 46
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 46
- 239000011248 coating agent Substances 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 29
- 238000005253 cladding Methods 0.000 claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims description 9
- 239000012895 dilution Substances 0.000 claims description 6
- 238000010790 dilution Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 19
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000012467 final product Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 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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- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B7/00—Switches; Crossings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B7/00—Switches; Crossings
- E01B7/02—Tongues; Associated constructions
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a method for manufacturing a sliding bedplate of a railway turnout of a passenger special line by high-speed laser cladding on the surface, wherein the focusing point of a laser beam is arranged at 1.5-2.5mm above the upper surface of the bedplate, and Fe-based alloy powder is conveyed to the focusing point by a conveying device; firstly, heating the surface of a table board by laser beams to form a molten pool; the Fe-based alloy powder heated by the laser beam forms liquid of the Fe-based alloy powder in a molten or semi-molten state, then the liquid drops into the molten pool, and then the liquid is rapidly cooled by utilizing the heat conduction action of the bedplate to form metallurgical bonding of a coating and the bedplate metal; then, after subsequent processing, the turnout sliding type bedplate with the surface having the antirust and wear-resistant properties is manufactured; the invention has the advantages that: the defects that the melting state is not uniform and metallurgical bonding cannot be formed between individual places and the coating when powder alloy is placed on the surface of the bedplate substrate and laser cladding is carried out are avoided; the cladding work efficiency is high, the heat input is small, the matrix is not deformed, and the requirement of large-scale production can be met.
Description
Technical Field
The invention relates to the technical field of manufacturing of sliding type bedplate parts of railway turnout base plates of passenger special lines, in particular to a method for manufacturing a sliding type bedplate of a railway turnout of a passenger special line by laser cladding on the surface.
Background
The sliding bedplate is a key part of a railway turnout of a passenger special line, and has the important function of supporting a switch point rail and a point rail, and the switch point rail and the point rail are subjected to turnout conversion on the surface in a sliding mode. Because the railway turnout is in an open environment and the switch rail and the point rail frequently slide during the switching of the turnout, the surface of the sliding bedplate is rusted and abraded, and the turnout switching equipment and the running safety of a high-speed train are related. Therefore, the railway turnout of the passenger special line requires that the surfaces of the sliding type bedplate, the switch rail and the point rail, which are contacted with each other, have good rust prevention and wear resistance. At present, the manufacturing method adopted by the prior sliding bedplate with the antirust and wear-resistant surfaces for the railway turnout of the passenger dedicated line is as follows:
1. the surfacing method comprises the following steps: the turnout sliding type bedplate with the antirust and wear-resistant surfaces is manufactured by adopting a traditional welding process and stainless steel welding wire welding materials, surfacing is carried out on the surface of a prefabricated sliding type bedplate substrate needing surfacing to form a stainless steel welding wire coating, the coating and the sliding type bedplate substrate are metallurgically combined, and then subsequent processing is carried out.
The production process flow of the surfacing turnout sliding bedplate is as follows:
prefabricating a sliding bedplate base body, processing the surface of the bedplate base body, surfacing, and processing the surfacing sliding bedplate.
The surfacing process has the problems that: the heat input is large, the deformation of the sliding platen substrate is large, the dilution rate of welding materials is high, the surfacing coating is thick, the surface of the coating is uneven, the waste of the substrate materials and the welding materials in the manufacturing process is large, the period of subsequent processing time is long, the production efficiency is low, and the application cost is high.
2. The surface laser cladding method comprises the following steps: the turnout sliding type bedplate with the antirust and wear-resistant surfaces is manufactured by adopting a traditional CO2 laser, Ni-based alloy powder cladding materials and a preset surface laser cladding process, presetting Ni-based alloy powder on the surface of a prefabricated sliding type bedplate substrate to be clad in advance, then irradiating and scanning by using laser beams, simultaneously melting and rapidly solidifying the surface of the sliding type bedplate substrate and the preset Ni-based alloy powder to form a Ni-based alloy powder coating, metallurgically combining the coating and the sliding type bedplate substrate, and then performing subsequent processing.
The surface laser cladding process parameters, the working parameters and the process flow are as follows:
CO2 laser surface cladding technological parameter
A laser: a DL-HL-T5000 type CO2 laser;
power: 4000 w;
the diameter of the light spot: 2.8 mm;
scanning speed: 2.8 m/min;
the lap joint rate: 35 percent.
4000w DL-HL-T5000 type CO2 laser surface cladding working parameter
Coating materials: a Ni-based alloy powder;
powder feeding mode: presetting:
cladding speed: when the cladding thickness is 0.5mm, the cladding efficiency is 0.25m2/h；
Dilution rate: 5 to 15 percent;
coating the surface: no crack:
bonding strength: and (4) metallurgical bonding.
Sliding platen surface laser cladding process flow
Surface treatment of a bedplate substrate, preset alloy powder, preheating of the bedplate substrate and the preset alloy powder, and surface laser cladding.
The production process flow of the surface laser cladding sliding platen comprises the following steps:
prefabricating a sliding bedplate substrate, processing the surface of the bedplate substrate, presetting alloy powder, performing surface laser cladding, and processing the sliding bedplate by the surface laser cladding.
The surface laser cladding process has the following problems: the cladding coating is thin, the coating surface is rough, the cladding work efficiency is low, the requirement of large-scale production cannot be met, and the application cost is high.
Disclosure of Invention
The invention aims to provide a method for manufacturing a sliding bedplate of a railway switch of a passenger special line by surface high-speed laser cladding, which aims to solve the problems of the existing methods for manufacturing the sliding bedplate of the railway switch of the passenger special line by surface surfacing and surface laser cladding. Practical tests show that the surface high-speed laser cladding manufacturing method adopted for producing the turnout sliding type bedplate of the passenger special line railway is a better way for improving the cladding working efficiency and the production efficiency of the coating on the surface of the turnout sliding type bedplate and reducing the application cost, and can meet the large-scale production requirement of the sliding type bedplate.
The technical scheme adopted by the invention is as follows:
a manufacturing method of a sliding bedplate of a railway turnout of a passenger special line by high-speed laser cladding on the surface comprises the steps of arranging a focusing point of a laser beam above the upper surface of the bedplate by 1.5-2.5mm, and conveying Fe-based alloy powder to the focusing point by a conveying device; firstly, heating the surface of a table board by laser beams to form a molten pool; then heating the Fe-based alloy powder by laser beams to form a liquid of the Fe-based alloy powder in a molten or semi-molten state, dripping the liquid of the Fe-based alloy powder into the molten pool, and then rapidly cooling by utilizing the heat conduction action of the platen to form metallurgical bonding of a coating and the platen metal; then, after subsequent processing, the turnout sliding type bedplate with the surface having the antirust and wear-resistant properties is manufactured;
the Fe-based alloy powder comprises the following chemical components in percentage by mass: 13-20 parts of Cr, 10-30 parts of Ni, 0.5-1.0 part of Mo, 0.5-1.0 part of Mn0.5, less than 3.5 parts of Si, less than 2.5 parts of B, 0.1-0.25 part of C, less than or equal to 0.045 part of P, less than or equal to 0.035 part of S and the balance of Fe.
The depth of the molten pool is 0.02-0.1 mm.
The focus position of the laser beam is fixed, Fe-based alloy powder is conveyed to the focus position through a conveying device in a synchronous powder conveying mode, and the platen moves from one side of the laser beam to the other side.
The particle size of the Fe-based alloy powder is 15-50 mu m, the sphericity is more than 90 percent, and the fluidity is less than 20s/50 g.
A small amount of energy of a laser beam is applied to the surface of a sliding type platen substrate to form a molten pool.
The fiber laser model is: ZKZM-4000 type fiber lasers; power: 4000 w; the diameter of the light spot: 2/3 mm; scanning speed: 35 m/min; the lap joint rate: 75 percent.
When the cladding thickness is 1.5mm, the cladding speed is 0.9m2H; dilution rate: less than or equal to 3 percent.
The invention has the advantages that: by arranging the focusing point of the laser beam above the surface of the bedplate, a small amount of energy can be acted on the surface of the sliding bedplate substrate and a molten pool can be formed, so that the phenomenon that the surface of the bedplate is heated at an overhigh temperature and the metal performance of the surface of the bedplate is degraded can be avoided; simultaneously, directly feeding the Fe-based alloy powder into a focusing point of a laser beam, so that most energy of the laser beam acts on the Fe-based alloy powder cladding material to form molten or semi-molten Fe-based alloy powder liquid; the liquid of Fe-based alloy powder in a molten or semi-molten state is dripped into the molten pool, is heated by laser and leaves a focusing point, and then is rapidly cooled and solidified by the sliding platen substrate, so that the defect that the melting state is uneven and metallurgical bonding cannot be formed between a certain place and a coating finally due to the blocking of the powder alloy on the surface of the substrate at the bottom when the powder alloy is placed on the surface of the platen substrate and laser cladding is carried out is avoided; in addition, the method of the invention also greatly improves the cladding speed, has high cladding work efficiency, small heat input, no deformation of the matrix, thicker cladding coating, small dilution rate of the coating, no crack on the surface of the coating, ultrasonic spraying surface effect, convenient and time-saving subsequent processing, manufacture material saving, short production period, high efficiency and lower application cost, and can meet the requirement of large-scale production.
Drawings
FIG. 1 is a schematic view showing the positions of a focus point and a surface of an Fe-based alloy powder and a platen during processing.
Detailed Description
The present invention is further illustrated by the following detailed description, which is provided for the purpose of explanation and not limitation.
Example 1
The manufacturing method of the surface high-speed laser cladding passenger special line railway turnout general sliding bed table and the roller sliding bed table comprises the following specific steps:
1. preparing a general sliding bed table and a roller sliding bed table base body and carrying out surface treatment:
the universal sliding bed and the roller sliding bed base body are prepared by adopting a casting or forging method,
the sand blasting method is adopted to carry out rust and oil removal treatment on the surfaces of the general sliding bed table and the roller sliding bed table base body,
2. the requirements of chemical components and appearance quality of Fe-based alloy powder are as follows:
the chemical components by mass percent: cr 13, Ni 20, Mo 1.0, Mn0.5, Si less than 3.5, B less than 2.5, C0.1-0.25, P less than or equal to 0.045, S less than or equal to 0.035, and Fe in balance.
Appearance quality: the granularity is 15 mu m, the sphericity is more than 90 percent, and the fluidity is less than 20s/50 g.
3. The cladding process flow is as follows:
as shown in fig. 1, the laser beam 5 is fixed in position, the discharge port of the Fe-based alloy powder conveying device corresponds to the focal point 51 of the laser beam, and the platen 1 is moved from one side of the focal point 51 of the laser beam 5 to the other side.
The height h of the focusing point 51 of the laser beam arranged above the upper surface of the bedplate is 1.5-2.5mm, wherein the focusing point 51 refers to a point where a plurality of laser beams are converged by a focusing lens, namely the point with the highest temperature; conveying the Fe-based alloy powder 4 to a focusing point 51 through a conveying device, wherein the conveying device can adopt a commercially available product or a screw type conveyor arranged on a moving workbench; the laser beam 5 firstly heats the surface of the bedplate 1 to form a molten pool 2, and the depth of the molten pool is 0.02-0.1 mm; then the laser beam 5 heats the Fe-based alloy powder 4 to form liquid of the Fe-based alloy powder in a molten or semi-molten state, the liquid of the Fe-based alloy powder drops into the molten pool 2, and then the liquid is rapidly cooled by utilizing the heat conduction action of the platen to form a metallurgical bonding 3 of the coating and the platen metal; then, after subsequent processing, the turnout sliding type bedplate with the surface having the antirust and wear-resistant properties is manufactured;
the cladding process parameters are as follows:
a laser: a ZKZM-4000 type fiber laser,
power: the flow rate of the mixed gas is 4000w,
the diameter of the light spot: 2/3mm in the thickness direction of the steel sheet,
scanning speed: the concentration of the mixed solution is 30m/min,
the lap joint rate: 75 percent of the total weight of the mixture,
cladding working parameters are as follows:
cladding alloy: a Fe-based alloy powder, a binder,
powder feeding mode: in a synchronous manner, the data are transmitted,
cladding speed: when the cladding thickness is 1.5mm, the cladding efficiency is 0.9m2/h，
Coating the surface: the effect of supersonic spraying surface can be achieved without cracks,
dilution rate: less than or equal to 3 percent;
bonding strength: metallurgical bonding, wherein the strength is more than or equal to 360 MPa;
4. the performance detection of the cladding coating on the surfaces of the universal sliding bed table and the roller sliding bed table comprises the following steps:
coating thickness: not less than 1.2mm, surface hardness: HB is more than or equal to 350 percent,
surface corrosion resistance: NSS is more than or equal to 60 h;
5. and (4) processing a universal sliding bed table and a roller sliding bed table for high-speed laser cladding of the surface.
The general production process flow of the surface high-speed laser cladding universal sliding bed table and the roller sliding bed table is as follows:
prefabricating a general sliding bed table and a roller sliding bed table base, processing the surface of the table base, performing high-laser cladding on the surface, detecting the performance of a cladding coating, and processing the general sliding bed table and the roller sliding bed table.
The final product had the following properties: coating thickness: not less than 1.2mm, surface hardness: HB is more than or equal to 350 percent,
surface corrosion resistance: NSS is more than or equal to 60 h;
example 2
Example 2 differs from example 1 only in the following:
the requirements of chemical components and appearance quality of Fe-based alloy powder are as follows:
the chemical components by mass percent: cr 20, Ni 10, Mo 0.75, Mn1.0, Si less than 3.5, B less than 2.5, C0.1-0.25, P less than or equal to 0.045, S less than or equal to 0.035, and Fe in balance.
Appearance quality: the granularity is 50 mu m, the sphericity is more than 90 percent, and the fluidity is less than 20s/50 g.
The final product performance is as follows: coating thickness: not less than 1.21mm, surface hardness: HB is more than or equal to 350 percent,
surface corrosion resistance: NSS is more than or equal to 60 h;
example 3
Example 3 differs from example 1 only in the following:
the requirements of chemical components and appearance quality of Fe-based alloy powder are as follows:
the chemical components by mass percent: cr 16, Ni 30, Mo 0.5, Mn0.75, Si less than 3.5, B less than 2.5, C0.1-0.25, P less than or equal to 0.045, S less than or equal to 0.035, and the balance of Fe.
Appearance quality: the granularity is 30 mu m, the sphericity is more than 90 percent, and the fluidity is less than 20s/50 g.
The final product performance is as follows: coating thickness 1.2mm, surface hardness: 350-356HB of the total weight of the raw materials,
surface corrosion resistance: NSS is more than or equal to 60 h.
Comparative example
The comparative example is completely consistent with the requirements of the chemical composition and appearance quality of the Fe-based alloy powder of example 3, but the processing mode is as follows: firstly, flatly paving Fe-based alloy powder on the surface of a bedplate, and then slowly heating and melting the Fe-based alloy powder by using laser to form a coating; properties of the final product: when the thickness of the coating is 1.2mm, the surface hardness is 330-338, HB;
it can be seen that the method of the present invention provides some improvement in the performance of the platen surface.
Claims (7)
1. A manufacturing method of a sliding bedplate of a railway turnout of a passenger special line by high-speed laser cladding on the surface is characterized by comprising the following steps: setting a focusing point of a laser beam to be 1.5-2.5mm above the upper surface of the bedplate, and conveying Fe-based alloy powder to the focusing point through a conveying device; firstly, heating the surface of a table board by laser beams to form a molten pool; then heating the Fe-based alloy powder by laser beams to form a liquid of the Fe-based alloy powder in a molten or semi-molten state, dripping the liquid of the Fe-based alloy powder into the molten pool, and then rapidly cooling by utilizing the heat conduction action of the platen to form metallurgical bonding of a coating and the platen metal; then, after subsequent processing, the turnout sliding type bedplate with the surface having the antirust and wear-resistant properties is manufactured;
the Fe-based alloy powder comprises the following chemical components in percentage by mass: 13-20 parts of Cr, 10-30 parts of Ni, 0.5-1.0 part of Mo, 0.5-1.0 part of Mn0.5, less than 3.5 parts of Si, less than 2.5 parts of B, 0.1-0.25 part of C, less than or equal to 0.045 part of P, less than or equal to 0.035 part of S and the balance of Fe.
2. The manufacturing method of the surface high-speed laser cladding railway turnout sliding type bedplate of the passenger dedicated line according to claim 1, which is characterized in that: the depth of the molten pool is 0.02-0.1 mm.
3. The manufacturing method of the surface high-speed laser cladding railway turnout sliding type bedplate of the passenger dedicated line according to claim 1, which is characterized in that: the focus position of the laser beam is fixed, Fe-based alloy powder is conveyed to the focus position through a conveying device in a synchronous powder conveying mode, and the platen moves from one side of the laser beam to the other side.
4. The manufacturing method of the surface high-speed laser cladding railway turnout sliding type bedplate of the passenger dedicated line according to claim 1, which is characterized in that: the particle size of the Fe-based alloy powder is 15-50 mu m, the sphericity is more than 90 percent, and the fluidity is less than 20s/50 g.
5. The manufacturing method of the surface high-speed laser cladding railway turnout sliding type bedplate of the passenger dedicated line according to claim 1, which is characterized in that: a small amount of energy of a laser beam is applied to the surface of a sliding type platen substrate to form a molten pool.
6. The manufacturing method of the surface high-speed laser cladding railway turnout sliding type bedplate of the passenger dedicated line according to claim 1, which is characterized in that: the fiber laser model is: ZKZM-4000 type fiber lasers; power: 4000 w; the diameter of the light spot: 2/3 mm; scanning speed: 35 m/min; the lap joint rate: 75 percent.
7. The manufacturing method of the surface high-speed laser cladding railway turnout sliding type bedplate of the passenger dedicated line according to claim 1, which is characterized in that: when the cladding thickness is 1.5mm, the cladding speed is 0.9m2H; the dilution rate is less than or equal to 3 percent.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115125530A (en) * | 2022-06-27 | 2022-09-30 | 中铁宝桥集团有限公司 | Anti-friction and anti-rust method for surface of turnout sliding bed bedplate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165981A (en) * | 2017-12-22 | 2018-06-15 | 北京机科国创轻量化科学研究院有限公司 | A kind of method that superelevation rate laser melting coating prepares austenitic stainless steel anti-corrosion coating |
| CN108456879A (en) * | 2018-01-23 | 2018-08-28 | 华中科技大学 | A kind of method of laser-auxiliary thermal source high efficiency composition cladding and hardening rail |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165981A (en) * | 2017-12-22 | 2018-06-15 | 北京机科国创轻量化科学研究院有限公司 | A kind of method that superelevation rate laser melting coating prepares austenitic stainless steel anti-corrosion coating |
| CN108456879A (en) * | 2018-01-23 | 2018-08-28 | 华中科技大学 | A kind of method of laser-auxiliary thermal source high efficiency composition cladding and hardening rail |
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| CN115125530A (en) * | 2022-06-27 | 2022-09-30 | 中铁宝桥集团有限公司 | Anti-friction and anti-rust method for surface of turnout sliding bed bedplate |
| CN115125530B (en) * | 2022-06-27 | 2024-04-09 | 中铁宝桥集团有限公司 | Antifriction and rust-proof method for surface of turnout sliding bed platen |
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