CN113399962A - Processing method of fishplate for railway - Google Patents

Processing method of fishplate for railway Download PDF

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Publication number
CN113399962A
CN113399962A CN202110671920.6A CN202110671920A CN113399962A CN 113399962 A CN113399962 A CN 113399962A CN 202110671920 A CN202110671920 A CN 202110671920A CN 113399962 A CN113399962 A CN 113399962A
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China
Prior art keywords
fishplate
processing
rolling
plate
railways
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CN202110671920.6A
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Chinese (zh)
Inventor
陈海忠
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Wuxi Husheng Intelligent Technology Co ltd
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Wuxi Husheng Intelligent Technology Co ltd
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Priority to CN202110671920.6A priority Critical patent/CN113399962A/en
Publication of CN113399962A publication Critical patent/CN113399962A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/20Making specific metal objects by operations not covered by a single other subclass or a group in this subclass railroad requirements, e.g. buffers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/08Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08Anti-corrosive paints
    • C09D5/10Anti-corrosive paints containing metal dust
    • C09D5/103Anti-corrosive paints containing metal dust containing Al
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08Anti-corrosive paints
    • C09D5/10Anti-corrosive paints containing metal dust
    • C09D5/106Anti-corrosive paints containing metal dust containing Zn
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C37/00Cast-iron alloys
    • C22C37/06Cast-iron alloys containing chromium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C37/00Cast-iron alloys
    • C22C37/10Cast-iron alloys containing aluminium or silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/36Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/48Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • C23C22/50Treatment of iron or alloys based thereon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B21B2001/386Plates
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • C08K3/08Metals
    • C08K2003/0812Aluminium
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • C08K3/08Metals
    • C08K2003/0893Zinc

Abstract

The invention discloses a method for processing a fishplate for a railway, which has the technical scheme that: the method comprises the following steps: s1, casting the continuous casting billet into a billet after smelting by a heating furnace; s2, removing phosphorus by using a high-pressure water descaling device, and performing primary rolling by using a phi 750 two-roller reversible rolling mill; s3, performing secondary rolling by using a phi 650 two-roll continuous rolling mill set; s4, processing the plate into a fishplate by using a fixed-length cold saw and turning, and polishing; s5, cleaning and leveling the fishplate; s6, passivating the fishplate; s7, coating an antirust coating on the surface of the fishplate; the processing method of the fishplate for the railway produces the fishplate by adopting the steps of continuous casting blank forming, primary rolling, secondary rolling, saw cutting, turning, polishing, leveling, passivating, spraying of an anti-rust coating and the like, the produced fishplate has small shape, is not easy to rust, and greatly prolongs the service life; in addition, the processing method of the fishplate for the railway is short and reasonable in process and low in production and arrangement cost.

Description

Processing method of fishplate for railway
Technical Field
The invention relates to the field of fishplate processing, in particular to a method for processing a fishplate for a railway.
Background
The fishplate, commonly known as the clamping plate, plays a connecting role at the joint of the track, and is a connecting fastener used for connecting the track. The machining process is generally performed by using a blank plate, and performing processes such as turning, grinding and the like on each side surface of the blank plate according to a certain machining sequence.
The prior Chinese patent with publication number CN110076532A discloses a fishplate processing technology, which belongs to the technical field of fishplate processing, and the technical scheme is characterized by comprising the steps of sawing, milling an end face, milling a large side face, milling an inclined side face I, milling an inclined side face II, chamfering, drilling and the like, and the fishplate processing technology has the advantage of high turning and milling processing efficiency; the optimized scheme also comprises a boss milling step, the processed fishplate has the characteristics of light self weight and convenience in carrying and mounting, the tensile strength reaches 935MPa, and the lower flexural strength reaches 623MPa, and the performance of the fishplate is equivalent to that of the conventional fishplate. In a further preferred scheme, the step of milling the large side face is completed on first turn-milling equipment, and two large side faces of the fishplate blank plate can be simultaneously turn-milled; the step of milling the inclined side is completed on the second milling device, and the plurality of fishplate blank plates can be simultaneously milled by turning, so that the processing efficiency of the fishplate is greatly improved, and inconvenience and labor waste caused by multiple times of processing and flow transfer of workpieces one by one are reduced.
The above-mentioned fishplate processing technique has some disadvantages, such as: fishplates are prone to corrosion and deformation, requiring process modifications.
Disclosure of Invention
In view of the problems mentioned in the background art, the present invention is to provide a method for processing a fishplate for a railway, so as to solve the problems mentioned in the background art.
The technical purpose of the invention is realized by the following technical scheme:
a processing method of a fishplate for a railway comprises the following steps:
s1, casting the continuous casting billet into a billet after smelting by a heating furnace;
s2, removing phosphorus by using a high-pressure water descaling device, and performing primary rolling by using a phi 750 two-roller reversible rolling mill;
s3, performing secondary rolling by using a phi 650 two-roll continuous rolling mill set;
s4, processing the plate into a fishplate by using a fixed-length cold saw and turning, and polishing;
s5, cleaning and leveling the fishplate;
s6, passivating the fishplate;
s7, coating an antirust coating on the surface of the fishplate.
Preferably, the casting temperature of the S1 is controlled to be 1380-1390 ℃, the chemical components are controlled to be C2.0-2.8%, Si 2.3-2.8%, P is less than or equal to 0.07%, S is less than or equal to 0.025%, Mn 1-2%, Cr 1-2%, and the balance of iron.
Preferably, when the S2 high-pressure water is used for descaling, the included angle between the high-pressure spray nozzle and the slab is 55-65 degrees, and the spray pressure is 28-44 MPa.
Preferably, when the S2 is rolled for one time, the rolling reduction is 55% -60%, the rolling speed is 900-1300m/min, and the roughness of the roller is 0.28 microns.
Preferably, when the S3 is rolled for the second time, the rolling reduction is 20% -30%, the rolling speed is 500-600m/min, and the roughness of the roller is 0.16 micron.
Preferably, when the fishplate is passivated in S6, the selected passivation solution includes the following components by mass percent: ce (N03)3:30-35g/L, La (N03)3:0.5-2g/L, HA:20-40mL/L, HB03: 3-4 g/L, pH value is 2.0-4.0.
Preferably, in the step S5, when the fishplate is leveled, the shape-correcting press plates are selected, the shape-correcting press plates are placed on two sides of the plate, the temperature of the shape-correcting press plates is raised to 520-540 ℃, the temperature is kept for 3-5 h, then the temperature is raised to 660-680 ℃, the temperature is kept for 5-7 h, then the temperature is cooled to 260-280 ℃ along with the furnace, and then the fishplate is discharged from the furnace after being air-cooled to 50-60 ℃.
Preferably, the antirust coating coated on the surface of the fishplate in the step S7 comprises the following components in percentage by mass: 80-85% of aluminum powder, 1-3% of zinc powder, 1-2% of alkyd resin, 1-3% of benzoyl peroxide, 5-7% of corrosion inhibitor and 4-8% of dispersing agent.
Preferably, the aluminum powder, the zinc powder, the alkyd resin, the benzoyl peroxide, the corrosion inhibitor and the dispersing agent with the formula amount are mixed, ground and dispersed at a high speed to prepare slurry, and the slurry is heated to 80-90 ℃ and then sprayed on a plate to form the antirust coating.
In summary, the invention mainly has the following beneficial effects:
the processing method of the fishplate for the railway produces the fishplate by adopting the steps of continuous casting blank forming, primary rolling, secondary rolling, saw cutting, turning, polishing, leveling, passivating, spraying of an anti-rust coating and the like, the produced fishplate has small shape and is not easy to rust, the service life is greatly prolonged, and the working procedures are more reasonable; in addition, the processing method of the fishplate for the railway is short and reasonable in process and low in production and arrangement cost.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, a method for processing a fishplate for a railway includes the steps of:
s1, casting the continuous casting billet into a billet after smelting by a heating furnace;
s2, removing phosphorus by using a high-pressure water descaling device, and performing primary rolling by using a phi 750 two-roller reversible rolling mill;
s3, performing secondary rolling by using a phi 650 two-roll continuous rolling mill set;
s4, processing the plate into a fishplate by using a fixed-length cold saw and turning, and polishing;
s5, cleaning and leveling the fishplate;
s6, passivating the fishplate;
s7, coating an antirust coating on the surface of the fishplate.
Wherein the casting temperature of S1 is 1380 ℃, the chemical composition is controlled at C2.0%, Si 2.3%, P is less than or equal to 0.07%, S is less than or equal to 0.025%, Mn 1%, Cr 1%, and the rest is iron.
When S2 high-pressure water is used for descaling, the included angle between the high-pressure spray nozzle and the plate blank is 55 degrees, and the spray pressure is 28 MPa.
Wherein, when the S2 is rolled for one time, the rolling reduction is 55 percent, the rolling speed is 900m/min, and the roughness of the roller is 0.28 micron.
Wherein, when the secondary rolling is carried out in S3, the rolling reduction is 20%, the rolling speed is 500m/min, and the roughness of the roller is 0.16 micron.
When the fishplate is passivated in the S6 process, the selected passivation solution comprises the following components in percentage by mass: ce (N03)3:30-35g/L, La (N03)3:0.5-2g/L, HA:20-40mL/L, HB03: 3-4 g/L, pH value is 2.0-4.0.
S5, leveling the fishplate, selecting a shape-correcting pressing plate, placing the shape-correcting pressing plate on two sides of the plate, heating the shape-correcting pressing plate to 520 ℃, keeping the temperature for 3-5 h, then continuously heating to 660 ℃, keeping the temperature for 5h, then cooling to 260 ℃ along with the furnace, then cooling to 50 ℃ in air, and then discharging from the furnace.
The antirust coating coated on the surface of the fishplate in the S7 comprises the following components in parts by mass: 80% of aluminum powder, 1% of zinc powder, 2% of alkyd resin, 3% of benzoyl peroxide, 7% of corrosion inhibitor and 7% of dispersing agent.
The anti-rust paint is prepared by mixing, grinding and dispersing aluminum powder, zinc powder, alkyd resin, benzoyl peroxide, a corrosion inhibitor and a dispersing agent according to the formula ratio to prepare slurry, heating the slurry to 80-90 ℃, and spraying the slurry on a plate to form an anti-rust coating.
The processing method of the fishplate for the railway produces the fishplate by adopting the steps of continuous casting blank forming, primary rolling, secondary rolling, saw cutting, turning, polishing, leveling, passivating, spraying of an anti-rust coating and the like, the produced fishplate is small in size, is not easy to rust, greatly prolongs the service life, and is reasonable in process; in addition, the processing method of the fishplate for the railway is short and reasonable in process and low in production and arrangement cost.
Example 2
Referring to fig. 1, a method for processing a fishplate for a railway includes the steps of:
s1, casting the continuous casting billet into a billet after smelting by a heating furnace;
s2, removing phosphorus by using a high-pressure water descaling device, and performing primary rolling by using a phi 750 two-roller reversible rolling mill;
s3, performing secondary rolling by using a phi 650 two-roll continuous rolling mill set;
s4, processing the plate into a fishplate by using a fixed-length cold saw and turning, and polishing;
s5, cleaning and leveling the fishplate;
s6, passivating the fishplate;
s7, coating an antirust coating on the surface of the fishplate.
Wherein the casting temperature of S1 is controlled at 1390 ℃, the chemical composition is controlled at C2.8%, Si 2.8%, P is less than or equal to 0.07%, S is less than or equal to 0.025%, Mn 2%, Cr 2%, and the rest is iron.
When S2 high-pressure water is used for descaling, the included angle between the high-pressure spray nozzle and the plate blank is 65 degrees, and the spray pressure is 44 MPa.
Wherein, when the S2 is rolled for one time, the rolling reduction is 60 percent, the rolling speed is 1300m/min, and the roughness of the roller is 0.28 micron.
Wherein, when the secondary rolling is carried out in S3, the rolling reduction is 30 percent, the rolling speed is 600m/min, and the roughness of the roller is 0.16 micron.
When the fishplate is passivated in the S6 process, the selected passivation solution comprises the following components in percentage by mass: ce (N03)3:30-35g/L, La (N03)3:0.5-2g/L, HA:20-40mL/L, HB03: 3-4 g/L, pH value is 4.0.
S5, leveling the fishplate, selecting a shape-correcting pressing plate, placing the shape-correcting pressing plate on two sides of the plate, heating the shape-correcting pressing plate to 540 ℃, keeping the temperature for 5 hours, then continuously heating to 680 ℃, keeping the temperature for 7 hours, then cooling to 280 ℃ along with the furnace, then cooling to 60 ℃ in air, and then discharging from the furnace.
The antirust coating coated on the surface of the fishplate in the S7 comprises the following components in parts by mass: 80% of aluminum powder, 1% of zinc powder, 2% of alkyd resin, 3% of benzoyl peroxide, 7% of corrosion inhibitor and 7% of dispersing agent.
The anti-rust paint is prepared by mixing, grinding and dispersing aluminum powder, zinc powder, alkyd resin, benzoyl peroxide, a corrosion inhibitor and a dispersing agent according to the formula ratio to prepare slurry, heating the slurry to 80-90 ℃, and spraying the slurry on a plate to form an anti-rust coating.
Example 3
Referring to fig. 1, a method for processing a fishplate for a railway includes the steps of:
s1, casting the continuous casting billet into a billet after smelting by a heating furnace;
s2, removing phosphorus by using a high-pressure water descaling device, and performing primary rolling by using a phi 750 two-roller reversible rolling mill;
s3, performing secondary rolling by using a phi 650 two-roll continuous rolling mill set;
s4, processing the plate into a fishplate by using a fixed-length cold saw and turning, and polishing;
s5, cleaning and leveling the fishplate;
s6, passivating the fishplate;
s7, coating an antirust coating on the surface of the fishplate.
Wherein the casting temperature of S1 is 1385 ℃, the chemical components are C2.5%, Si 2.3% -2.8%, P is less than or equal to 0.07%, S is less than or equal to 0.025%, Mn 1.5%, Cr1.5%, and the rest is iron.
When S2 high-pressure water is used for descaling, the included angle between the high-pressure spray nozzle and the plate blank is 60 degrees, and the spray pressure is 34 MPa.
Wherein, when the S2 is rolled for one time, the rolling reduction is 58 percent, the rolling speed is 1200m/min, and the roughness of the roller is 0.28 micron.
Wherein, when the secondary rolling is carried out in S3, the rolling reduction is 25%, the rolling speed is 560m/min, and the roughness of the roller is 0.16 micron.
When the fishplate is passivated in the S6 process, the selected passivation solution comprises the following components in percentage by mass: ce (N03)3:30-35g/L, La (N03)3:0.5-2g/L, HA:20-40mL/L, HB03: 3-4 g/L, pH value is 3.0.
S5, leveling the fishplate, selecting a shape-correcting press plate, placing the shape-correcting press plate on two sides of the plate, heating the shape-correcting press plate to 530 ℃, keeping the temperature for 4h, then continuously heating to 670 ℃, keeping the temperature for 6h, then cooling to 270 ℃ along with the furnace, then cooling to 55 ℃ in air, and then discharging from the furnace.
The antirust coating coated on the surface of the fishplate in the S7 comprises the following components in parts by mass: 80% of aluminum powder, 1% of zinc powder, 2% of alkyd resin, 3% of benzoyl peroxide, 7% of corrosion inhibitor and 7% of dispersing agent.
The anti-rust paint is prepared by mixing, grinding and dispersing aluminum powder, zinc powder, alkyd resin, benzoyl peroxide, a corrosion inhibitor and a dispersing agent according to the formula ratio to prepare slurry, heating the slurry to 80-90 ℃, and spraying the slurry on a plate to form an anti-rust coating.
Example 4
Referring to fig. 1, a method for processing a fishplate for a railway includes the steps of:
s1, casting the continuous casting billet into a billet after smelting by a heating furnace;
s2, removing phosphorus by using a high-pressure water descaling device, and performing primary rolling by using a phi 750 two-roller reversible rolling mill;
s3, performing secondary rolling by using a phi 650 two-roll continuous rolling mill set;
s4, processing the plate into a fishplate by using a fixed-length cold saw and turning, and polishing;
s5, cleaning and leveling the fishplate;
s6, passivating the fishplate;
s7, coating an antirust coating on the surface of the fishplate.
Wherein the casting temperature of S1 is 1388 ℃, the chemical components are C2.2%, Si 2.5%, P less than or equal to 0.07%, S less than or equal to 0.025%, Mn 1.6%, Cr1.7%, and the rest is Fe.
When S2 high-pressure water is used for descaling, the included angle between the high-pressure spray nozzle and the plate blank is 55-65 degrees, and the spray pressure is 32 MPa.
Wherein, when the S2 is rolled for one time, the rolling reduction is 57 percent, the rolling speed is 1100m/min, and the roughness of the roller is 0.28 micron.
Wherein, when the secondary rolling is carried out in S3, the rolling reduction is 25%, the rolling speed is 530m/min, and the roughness of the roller is 0.16 micron.
When the fishplate is passivated in the S6 process, the selected passivation solution comprises the following components in percentage by mass: ce (N03)3:30-35g/L, La (N03)3:0.5-2g/L, HA:20-40mL/L, HB03: 3-4 g/L, pH value is 2.5.
S5, leveling the fishplate, selecting a shape-correcting pressing plate, placing the shape-correcting pressing plate on two sides of the plate, heating the shape-correcting pressing plate to 525 ℃, keeping the temperature for 3h, then continuing to heat to 668 ℃, keeping the temperature for 6h, then cooling to 268 ℃ along with the furnace, then cooling to 57 ℃ in air, and then discharging from the furnace.
The antirust coating coated on the surface of the fishplate in the S7 comprises the following components in parts by mass: 80% of aluminum powder, 1% of zinc powder, 2% of alkyd resin, 3% of benzoyl peroxide, 7% of corrosion inhibitor and 7% of dispersing agent.
The anti-rust paint is prepared by mixing, grinding and dispersing aluminum powder, zinc powder, alkyd resin, benzoyl peroxide, a corrosion inhibitor and a dispersing agent according to the formula ratio to prepare slurry, heating the slurry to 80-90 ℃, and spraying the slurry on a plate to form an anti-rust coating.
In order to verify the performance of the fishplates processed by the fishplate processing method, the following experiments were carried out, wherein the fishplates of the control group and the fishplates produced in example 1, example 2, example 3 and example 4 were selected for comparison by taking the numerical values of the control group as a reference.
The experimental contents and results are given in the following table:
strength of Anti-rust ability Wear resistance Degree of deformation
Control group 1 1 1 1
Example 1 1.5 2 3 6%
Example 2 1.8 2.3 2.5 4%
Example 3 1.9 2.1 2.3 2%
Example 4 1.7 1.8 2.1 2%
Through experiments, the fishplates produced by the processes of example 1, example 2, example 3 and example 4 have better results than the fishplates produced by the conventional process, and example 2 is the best example.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. A processing method of a fishplate for a railway is characterized by comprising the following steps: the method comprises the following steps:
s1, casting the continuous casting billet into a billet after smelting by a heating furnace;
s2, removing phosphorus by using a high-pressure water descaling device, and performing primary rolling by using a phi 750 two-roller reversible rolling mill;
s3, performing secondary rolling by using a phi 650 two-roll continuous rolling mill set;
s4, processing the plate into a fishplate by using a fixed-length cold saw and turning, and polishing;
s5, cleaning and leveling the fishplate;
s6, passivating the fishplate;
s7, coating an antirust coating on the surface of the fishplate.
2. The method for processing a fishplate for railways of claim 1, comprising the steps of: the casting temperature of the S1 is controlled to be 1380-1390 ℃, the chemical components are controlled to be C2.0-2.8%, Si 2.3-2.8%, P is less than or equal to 0.07%, S is less than or equal to 0.025%, Mn 1-2%, Cr 1-2%, and the balance of iron.
3. The method for processing a fishplate for railways of claim 1, comprising the steps of: and when the high-pressure water descaling is carried out in the S2 process, the included angle between the high-pressure spray nozzle and the plate blank is 55-65 degrees, and the spray pressure is 28-44 MPa.
4. The method for processing a fishplate for railways of claim 1, comprising the steps of: when the S2 is rolled for one time, the rolling reduction rate is 55-60%, the rolling speed is 900-1300m/min, and the roughness of the roller is 0.28 micron.
5. The method for processing a fishplate for railways of claim 1, comprising the steps of: when the S3 is rolled for the second time, the rolling reduction rate is 20-30%, the rolling speed is 500-600m/min, and the roughness of the roller is 0.16 micron.
6. The method for processing a fishplate for railways of claim 1, comprising the steps of: when the fishplate is passivated in the S6, the selected passivation solution comprises the following components in percentage by mass: ce (N03)3:30-35g/L, La (N03)3:0.5-2g/L, HA:20-40mL/L, HB03: 3-4 g/L, pH value is 2.0-4.0.
7. The method for processing a fishplate for railways of claim 1, comprising the steps of: s5, when the fishplate is leveled, a shape correcting press plate is selected, the shape correcting press plate is placed on two sides of the plate, the temperature of the shape correcting press plate is raised to 520-540 ℃, the temperature is kept for 3-5 h, then the temperature is raised to 660-680 ℃, the temperature is kept for 5-7 h, then the plate is cooled to 260-280 ℃ along with the furnace, and then the plate is discharged from the furnace after air cooling to 50-60 ℃.
8. The method for processing a fishplate for railways of claim 1, comprising the steps of: the antirust coating coated on the surface of the fishplate in the S7 comprises the following components in parts by mass: 80-85% of aluminum powder, 1-3% of zinc powder, 1-2% of alkyd resin, 1-3% of benzoyl peroxide, 5-7% of corrosion inhibitor and 4-8% of dispersing agent.
9. The method for processing a fishplate for railways of claim 8, wherein: the aluminum powder, the zinc powder, the alkyd resin, the benzoyl peroxide, the corrosion inhibitor and the dispersant in the formula amount are mixed, ground and dispersed at a high speed to prepare slurry, and the slurry is heated to 80-90 ℃ and then sprayed on a plate to form an antirust coating.
CN202110671920.6A 2021-06-17 2021-06-17 Processing method of fishplate for railway Pending CN113399962A (en)

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Publication number Priority date Publication date Assignee Title
CN1483521A (en) * 2002-09-19 2004-03-24 鞍钢集团新钢铁有限责任公司 Method for continuous casting, continuoccs rolling intermediate and thin sheet blanket
CN102817288A (en) * 2012-06-11 2012-12-12 大足县立生矿山设备配件有限公司 Machining method of track clamping plate
CN105414237A (en) * 2015-12-11 2016-03-23 山东石横特钢集团有限公司 Steel section producing device and process thereof
CN105537487A (en) * 2016-01-27 2016-05-04 山东远大特材科技股份有限公司 Manufacturing method for special-shaped fishplate and dies
CN107262526A (en) * 2017-07-14 2017-10-20 山东泰丰纵横科技有限公司 The new processing method and mould of a kind of railroad tie plate
CN110076532A (en) * 2019-05-22 2019-08-02 华德澳铁路技术(苏州)有限公司 A kind of fish tail board machining process
CN110343832A (en) * 2019-07-29 2019-10-18 天津市三木森电炉股份有限公司 A kind of special heating furnace production line for railroad track clamping plate

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1483521A (en) * 2002-09-19 2004-03-24 鞍钢集团新钢铁有限责任公司 Method for continuous casting, continuoccs rolling intermediate and thin sheet blanket
CN102817288A (en) * 2012-06-11 2012-12-12 大足县立生矿山设备配件有限公司 Machining method of track clamping plate
CN105414237A (en) * 2015-12-11 2016-03-23 山东石横特钢集团有限公司 Steel section producing device and process thereof
CN105537487A (en) * 2016-01-27 2016-05-04 山东远大特材科技股份有限公司 Manufacturing method for special-shaped fishplate and dies
CN107262526A (en) * 2017-07-14 2017-10-20 山东泰丰纵横科技有限公司 The new processing method and mould of a kind of railroad tie plate
CN110076532A (en) * 2019-05-22 2019-08-02 华德澳铁路技术(苏州)有限公司 A kind of fish tail board machining process
CN110343832A (en) * 2019-07-29 2019-10-18 天津市三木森电炉股份有限公司 A kind of special heating furnace production line for railroad track clamping plate

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