CN115233149A - Treatment method for improving wear-resisting and corrosion-resisting characteristics of surface of cast steel material - Google Patents
Treatment method for improving wear-resisting and corrosion-resisting characteristics of surface of cast steel material Download PDFInfo
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- CN115233149A CN115233149A CN202110445855.5A CN202110445855A CN115233149A CN 115233149 A CN115233149 A CN 115233149A CN 202110445855 A CN202110445855 A CN 202110445855A CN 115233149 A CN115233149 A CN 115233149A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/48—Nitriding
- C23C8/50—Nitriding of ferrous surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
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Abstract
The invention discloses a treatment method for improving the wear-resistant and corrosion-resistant characteristics of the surface of a cast steel material, which belongs to the technical field of wear-resistant and corrosion-resistant treatment of the surface of steel and comprises the following steps: the method comprises the steps of obtaining a cast steel material to be treated, adding a degreasing agent to improve the liquid temperature, and degreasing and cleaning the surface of the cast steel material for a period of time; the method has the advantages that the nitriding treatment is arranged in the method, the chemical property of salt is effectively utilized, the compound layer of the cast steel material cannot be damaged, the self-retaining degree in the cleaning process is good, the method can be suitable for the cast steel material with a more complex appearance, the processing range of the method is improved, the operation difficulty of technical personnel is greatly reduced, the method can realize the generation of a nitriding layer in a short time, the whole treatment process efficiency is improved, meanwhile, the structural strength and the whole wear resistance of the cast steel material can be effectively improved in the nitriding treatment process, the service life of the cast steel material can be well prolonged, and the application effect of the treatment method is improved.
Description
Technical Field
The invention belongs to the technical field of wear-resistant and corrosion-resistant treatment of steel surfaces, and particularly relates to a treatment method for improving wear-resistant and corrosion-resistant characteristics of a cast steel material surface.
Background
Steel products are materials which take steel as raw materials as the name implies, the steel products are various, different steel products are used in different fields, the cost price of the steel is lower, but the steel products have reliable service performance, so the steel products become one of the most used materials in the world, and are indispensable components in the building industry, the manufacturing industry and the daily life of people. Steel is a material base of modern society, cast steel is one of steel materials, and the outer surface of the cast steel material needs to be treated in order to improve the surface wear resistance and corrosion resistance of the cast steel material.
In the existing research on environment-friendly coatings, for example, publication number (CN 201710696344.4) discloses a treatment method for improving the wear-resistant and corrosion-resistant properties of the surface of a cast steel material, which improves the existing processing treatment process, wherein the cast steel material is subjected to special cooling treatment after carburization, the whole cooling treatment operation produces a quenching treatment effect on the cast steel material, so as to effectively improve the hardness, toughness and the like of the cast steel material.
Disclosure of Invention
The invention aims to: the treatment method for improving the wear-resisting and corrosion-resisting properties of the surface of the cast steel material is provided in order to solve the problems that the traditional method is not provided with a nitriding treatment step, cannot be suitable for the cast steel material with more complex appearance, cannot improve the processing treatment range of the method and also improves the operation difficulty of technicians.
In order to achieve the purpose, the invention adopts the following technical scheme: a treatment method for improving the wear-resisting and corrosion-resisting properties of the surface of a cast steel material comprises the following steps:
s1, obtaining a cast steel material to be treated, placing the cast steel material in a container, adding a degreasing agent to improve the liquid temperature, and degreasing and cleaning the surface of the cast steel material for a period of time;
s2, placing the cleaned cast steel material in an induction furnace, raising the temperature, preserving the temperature for a period of time, placing the steel material in a water explosion pool, and removing an oxidation film on the surface of the cast steel material;
s3, keeping the cast steel material in the water explosion pool for a period of time, reducing the temperature of the cast steel material to a certain degree, checking, observing whether an oxide film on the outer surface of the cast steel material is removed, if so, carrying out the next step, and if not, repeating the step S2;
s4, taking out the cast steel material after the oxide film layer is stripped, placing the cast steel material in a container, adding acid liquor into the container, carrying out acid pickling on the outer surface of the cast steel material, and raising the temperature of the acid liquor for pickling for a period of time;
s5, after acid washing, completely discharging acid liquor, adding alkali liquor into the container, increasing the temperature of the alkali liquor, and carrying out alkali washing on the cast steel material for a period of time;
s6, taking out the cast steel material cleaned by the acid-alkali liquor, and cleaning the cast steel material by using clear water;
s7, after cleaning, putting the cast steel material into the induction furnace again, heating the cast steel material to a certain temperature, and preserving heat for a period of time;
s8, taking molten salt to be placed in a steel tool, taking out the cast steel material to be placed in the steel tool filled with the molten salt, taking a certain amount of barium chloride and neutral sodium chloride to be flatly laid on the surface of the cast steel material, and performing nitriding treatment on the surface of the cast steel material in the molten salt by using nitrogen formed by molten salt decomposition and chemical reaction;
s9, placing the steel casting material subjected to nitriding treatment in an induction furnace, increasing the temperature in the furnace body, heating the steel casting material, immersing the steel casting material in liquid for quenching, and immediately heating for tempering;
s10, after tempering, naturally cooling the cast steel material to be treated;
s11, testing the wear resistance of the treated cast steel material;
s12, after testing, placing the cast steel material in a spraying device, spraying wear-resistant anticorrosive paint on the surface of the cast steel material, raising the temperature in the spraying device, and drying a spraying surface;
and S13, drying, and taking out a processed finished product.
As a further description of the above technical solution:
in the step S1, the cast steel material to be treated is obtained, the cast steel material is placed in an ultrasonic cleaning machine, a degreasing agent is added to raise the liquid temperature to 50-80 ℃, the surface of the cast steel material is degreased and cleaned for 20-30min, and the degreasing agent is sodium tripolyphosphate.
As a further description of the above technical solution:
and S2, placing the cleaned cast steel material in an induction furnace, raising the temperature to 620-750 ℃, preserving the temperature for 10-20min, and then placing the steel material in a water explosion pool to remove the oxide film on the surface of the cast steel material.
As a further description of the above technical solution:
and in the step S3, the cast steel material is kept in the water explosion pool for 25-35min, the temperature of the cast steel material is reduced to 70-90 ℃, checking is carried out, whether the oxide film on the outer surface of the cast steel material is removed or not is observed, if the oxide film is removed, the next step is carried out, and if the oxide film is not completely removed, the step S2 is repeated.
As a further description of the above technical solution:
and S4, taking out the cast steel material after the oxide film layer is stripped, placing the cast steel material in a container, adding acid liquor into the container, pickling the outer surface of the cast steel material, wherein the acid liquor is sulfuric acid solution, raising the temperature of the acid liquor to 40-60 ℃, and pickling for 15-25min.
As a further description of the above technical solution:
in the step S5, after acid washing, acid liquor is completely discharged, alkali liquor which is sodium hydroxide solution is added into the container, the temperature of the alkali liquor is increased to 40-60 ℃, and alkali washing is carried out on the cast steel material for 25-30min.
As a further description of the above technical solution:
and in the step S7, after cleaning, putting the cast steel material into the induction furnace again, heating the cast steel material to 530-580 ℃, and preserving heat for 35-50min.
As a further description of the above technical solution:
in S8, the molten salt contains cyanide and cyanate, and the surface of the cast steel material in the molten salt is subjected to nitriding treatment by using nitrogen formed by decomposition and chemical reaction of the cyanate in the molten salt.
As a further description of the above technical solution:
and S9, placing the nitrided cast steel material into an induction furnace, raising the temperature in the furnace body to 900-950 ℃, heating the cast steel material, immersing the cast steel material into liquid for quenching, raising the temperature to 320-350 ℃, preserving the heat for 1-2 hours, and tempering.
As a further description of the above technical solution:
and S12, after testing, placing the cast steel material in a spraying device, spraying wear-resistant anticorrosive paint on the surface of the cast steel material, raising the temperature in the spraying device to 65-75 ℃, and drying the sprayed surface.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the method is internally provided with nitriding treatment, effectively utilizes the chemical property of salt, cannot damage a chemical combination layer of the cast steel material, has better self-retention degree in cleaning in the treatment process, can be suitable for the cast steel material with more complicated appearance, improves the processing treatment range of the method, greatly reduces the operation difficulty of technical personnel, can realize the generation of a nitriding layer in shorter time, improves the overall treatment process efficiency, can effectively improve the structural strength and the overall wear resistance of the cast steel material in the nitriding treatment process, can well prolong the service life of the cast steel material, improves the application effect of the treatment method, is internally provided with a performance test step, additionally tests the treated cast steel material, can be used for testing the actual effect of the treatment method, and has a self-checking effect.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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
The invention provides a technical scheme that: a treatment method for improving the wear-resisting and corrosion-resisting properties of the surface of a cast steel material comprises the following steps:
s1, obtaining a cast steel material to be treated, putting the cast steel material into an ultrasonic cleaning machine, adding a degreasing agent to increase the liquid temperature to 50 ℃, and carrying out degreasing cleaning on the surface of the cast steel material for 20min, wherein the degreasing agent is sodium tripolyphosphate;
s2, placing the cleaned cast steel material in an induction furnace, raising the temperature to 620 ℃, keeping the temperature for 10min, and then placing the steel material in a water explosion pool to remove an oxidation film on the surface of the cast steel material;
s3, keeping the cast steel material in the water explosion pool for 25min, reducing the temperature of the cast steel material to 70 ℃, checking, observing whether an oxide film on the outer surface of the cast steel material is removed, if so, carrying out the next step, and if not, repeating the step S2;
s4, taking out the cast steel material after the oxide film layer is stripped, placing the cast steel material in a container, adding acid liquor into the container, carrying out acid pickling on the outer surface of the cast steel material, wherein the acid liquor is sulfuric acid solution, raising the temperature of the acid liquor to 40 ℃, and carrying out acid pickling for 15min;
s5, after acid washing, completely discharging acid liquor, adding alkali liquor into the container, wherein the alkali liquor is sodium hydroxide solution, raising the temperature of the alkali liquor to 40 ℃, and carrying out alkali washing on the cast steel material for 25min;
s6, taking out the cast steel material cleaned by the acid-alkali liquor, and cleaning the cast steel material by using clear water;
s7, after cleaning, putting the cast steel material into the induction furnace again, heating the cast steel material to 530 ℃, and preserving heat for 35min;
s8, taking molten salt to be placed in a steel tool, taking out the cast steel material to be placed in the steel tool filled with the molten salt, flatly laying a certain amount of barium chloride and neutral sodium chloride on the surface of the cast steel material, wherein the molten salt contains cyanide and cyanate, and nitriding the surface of the cast steel material in the molten salt by utilizing nitrogen formed by decomposition and chemical reaction of the cyanate in the molten salt;
s9, placing the steel casting material subjected to nitriding treatment in an induction furnace, raising the temperature in the furnace to 900 ℃, heating the steel casting material, immersing the steel casting material in liquid for quenching, immediately raising the temperature to 320 ℃, preserving the heat for 1 hour, and tempering;
s10, after tempering, naturally cooling the cast steel material to be treated;
s11, testing the wear resistance of the treated cast steel material;
s12, after testing, placing the cast steel material in a spraying device, spraying wear-resistant anticorrosive paint on the surface of the cast steel material, raising the temperature in the spraying device to 65 ℃, and drying a spraying surface;
s13, drying, and taking out a finished product after treatment.
In the embodiment, the nitriding treatment is arranged in the steel plate, so that the chemical property of salt is effectively utilized, the chemical layer of the cast steel material cannot be damaged, the self-retaining degree is good in the cleaning process, the steel plate can be suitable for the cast steel material with a more complex appearance, the processing range of the method is improved, the operation difficulty of technicians is greatly reduced, the nitride layer can be generated in a short time, and the overall treatment process efficiency is improved.
Example 2
The invention provides a technical scheme that: a treatment method for improving the wear-resisting and corrosion-resisting properties of the surface of a cast steel material comprises the following steps:
s1, obtaining a cast steel material to be treated, putting the cast steel material into an ultrasonic cleaning machine, adding a degreasing agent to raise the liquid temperature to 70 ℃, and degreasing and cleaning the surface of the cast steel material for 25min, wherein the degreasing agent is sodium tripolyphosphate;
s2, placing the cleaned cast steel material in an induction furnace, raising the temperature to 700 ℃, preserving the temperature for 15min, placing the steel material in a water explosion pool, and removing an oxide film on the surface of the cast steel material;
s3, maintaining the cast steel material in the water explosion pool for 30min, reducing the temperature of the cast steel material to 80 ℃, checking, observing whether an oxide film on the outer surface of the cast steel material is removed, if so, carrying out the next step, and if not, repeating the step S2;
s4, taking out the cast steel material after the oxide film layer is stripped, placing the cast steel material in a container, adding acid liquor into the container, pickling the outer surface of the cast steel material, wherein the acid liquor is sulfuric acid solution, raising the temperature of the acid liquor to 50 ℃, and pickling for 20min;
s5, after acid washing, completely discharging acid liquor, adding alkali liquor into the container, wherein the alkali liquor is sodium hydroxide solution, raising the temperature of the alkali liquor to 50 ℃, and carrying out alkali washing on the cast steel material for 27min;
s6, taking out the cast steel material cleaned by the acid-alkali liquor, and cleaning the cast steel material by using clear water;
s7, after cleaning, putting the cast steel material into the induction furnace again, heating the cast steel material to 550 ℃, and preserving heat for 40min;
s8, taking molten salt to be placed in a steel tool, taking out the cast steel material to be placed in the steel tool filled with the molten salt, taking a certain amount of barium chloride and neutral sodium chloride to be flatly laid on the surface of the cast steel material, wherein the molten salt contains cyanide and cyanate, and performing nitriding treatment on the surface of the cast steel material in the molten salt by utilizing nitrogen formed by decomposition and chemical reaction of the cyanate in the molten salt;
s9, placing the nitrided cast steel material in an induction furnace, raising the temperature in the furnace body to 920 ℃, heating the cast steel material, immersing the cast steel material in liquid for quenching, further raising the temperature to 340 ℃ immediately, preserving the heat for 1.5 hours, and tempering;
s10, after tempering, naturally cooling the cast steel material to be treated;
s11, testing the wear resistance of the treated cast steel material;
s12, after testing, placing the cast steel material in a spraying device, spraying wear-resistant anticorrosive paint on the surface of the cast steel material, raising the temperature in the spraying device to 70 ℃, and drying a spraying surface;
and S13, drying, and taking out a processed finished product.
In the embodiment, the arranged nitriding treatment process can effectively improve the structural strength and the overall wear resistance of the cast steel material, can well prolong the service life of the cast steel material, and improves the application effect of the treatment method.
Example 3
The invention provides a technical scheme that: a treatment method for improving the wear-resisting and corrosion-resisting properties of the surface of a cast steel material comprises the following steps:
s1, obtaining a cast steel material to be treated, putting the cast steel material into an ultrasonic cleaning machine, adding a degreasing agent to increase the liquid temperature to 80 ℃, and carrying out degreasing cleaning on the surface of the cast steel material for 30min, wherein the degreasing agent is sodium tripolyphosphate;
s2, placing the cleaned cast steel material in an induction furnace, raising the temperature to 750 ℃, preserving the heat for 20min, placing the steel material in a water explosion pool, and removing an oxidation film on the surface of the cast steel material;
s3, keeping the cast steel material in the water explosion pool for 35min, reducing the temperature of the cast steel material to 90 ℃, checking, observing whether an oxide film on the outer surface of the cast steel material is removed, if so, carrying out the next step, and if not, repeating the step S2;
s4, taking out the cast steel material after the oxide film layer is stripped, placing the cast steel material in a container, adding acid liquor into the container, pickling the outer surface of the cast steel material, wherein the acid liquor is sulfuric acid solution, raising the temperature of the acid liquor to 60 ℃, and pickling for 25min;
s5, after acid washing, completely discharging acid liquor, adding alkaline liquor into the container, wherein the alkaline liquor is sodium hydroxide solution, raising the temperature of the alkaline liquor to 60 ℃, and carrying out alkaline washing on the cast steel material for 30min;
s6, taking out the cast steel material cleaned by the acid-alkali liquor, and cleaning the cast steel material by using clear water;
s7, after cleaning, putting the cast steel material into the induction furnace again, heating the cast steel material to 580 ℃, and preserving heat for 50min;
s8, taking molten salt to be placed in a steel tool, taking out the cast steel material to be placed in the steel tool filled with the molten salt, flatly laying a certain amount of barium chloride and neutral sodium chloride on the surface of the cast steel material, wherein the molten salt contains cyanide and cyanate, and nitriding the surface of the cast steel material in the molten salt by utilizing nitrogen formed by decomposition and chemical reaction of the cyanate in the molten salt;
s9, placing the nitrided cast steel material in an induction furnace, raising the temperature in the furnace body to 950 ℃, heating the cast steel material, immersing the cast steel material in liquid for quenching, further raising the temperature to 350 ℃, preserving the heat for 2 hours, and tempering;
s10, naturally cooling the cast steel material to be treated after tempering;
s11, testing the wear resistance of the treated cast steel material;
s12, after testing, placing the cast steel material in a spraying device, spraying wear-resistant anticorrosive paint on the surface of the cast steel material, raising the temperature in the spraying device to 75 ℃, and drying the sprayed surface;
and S13, drying, and taking out a processed finished product.
In the embodiment, a performance testing step is arranged in the cast steel processing method, and the processed cast steel material is additionally tested, so that the actual effect of the processing method can be tested, and the self-checking effect is achieved.
In examples 1 to 3, in S11, the following data were obtained for the wear resistance of the treated cast steel material:
the abrasion tests were carried out on a pin-and-disc high-temperature abrasion tester, providing loads of 50, 100, 150, 200N, respectively, and the abrasion loss is tabulated below:
| applying a load (N) | 50 | 100 | 150 | 200 |
| Amount of wear (mg) | 22 | 43 | 59 | 70 |
The obtained data show that the processed cast steel material has strong self-abrasion resistance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A treatment method for improving the wear-resisting and corrosion-resisting properties of the surface of a cast steel material is characterized by comprising the following steps: the method comprises the following steps:
s1, obtaining a cast steel material to be treated, placing the cast steel material in a container, adding a degreasing agent to improve the liquid temperature, and degreasing and cleaning the surface of the cast steel material for a period of time;
s2, placing the cleaned cast steel material in an induction furnace, raising the temperature, preserving the temperature for a period of time, placing the steel material in a water explosion pool, and removing an oxidation film on the surface of the cast steel material;
s3, keeping the cast steel material in the water explosion pool for a period of time, reducing the temperature of the cast steel material to a certain degree, checking, observing whether an oxide film on the outer surface of the cast steel material is removed, if so, carrying out the next step, and if not, repeating the step S2;
s4, taking out the cast steel material after the oxide film layer is stripped, placing the cast steel material in a container, adding acid liquor into the container, pickling the outer surface of the cast steel material, and raising the temperature of the acid liquor for pickling for a period of time;
s5, after acid washing, completely discharging acid liquor, adding alkali liquor into the container, increasing the temperature of the alkali liquor, and carrying out alkali washing on the cast steel material for a period of time;
s6, taking out the cast steel material cleaned by the acid-base solution, and cleaning the cast steel material by using clear water;
s7, after cleaning, putting the cast steel material into the induction furnace again, heating the cast steel material to a certain temperature, and preserving heat for a period of time;
s8, taking molten salt to be placed in a steel tool, taking out the cast steel material to be placed in the steel tool filled with the molten salt, taking a certain amount of barium chloride and neutral sodium chloride to be tiled on the surface of the cast steel material, and performing nitriding treatment on the surface of the cast steel material in the molten salt by using nitrogen formed by molten salt decomposition and chemical reaction;
s9, placing the steel casting material subjected to nitriding treatment in an induction furnace, increasing the temperature in the furnace body, heating the steel casting material, immersing the steel casting material in liquid for quenching, and immediately heating for tempering;
s10, naturally cooling the cast steel material to be treated after tempering;
s11, testing the wear resistance of the treated cast steel material;
s12, after testing, placing the cast steel material in a spraying device, spraying wear-resistant anticorrosive paint on the surface of the cast steel material, raising the temperature in the spraying device, and drying a spraying surface;
and S13, drying, and taking out a processed finished product.
2. The processing method for improving the wear-resistant and corrosion-resistant properties of the surface of the cast steel material as claimed in claim 1, wherein in the step S1, the cast steel material to be processed is obtained, the cast steel material is placed in an ultrasonic cleaning machine, a degreasing agent is added to raise the liquid temperature to 50-80 ℃, and the surface of the cast steel material is degreased and cleaned for 20-30min, wherein the degreasing agent is sodium tripolyphosphate.
3. The treatment method for improving the wear-resistant and corrosion-resistant properties of the surface of the cast steel material as claimed in claim 1, wherein in the step S2, the cleaned cast steel material is placed in an induction furnace, the temperature is raised to 620-750 ℃, and the steel material is placed in a water explosion pool after being kept for 10-20min, so that the oxide film on the surface of the cast steel material is removed.
4. The treatment method for improving the wear-resisting and corrosion-resisting properties of the surface of the cast steel material as claimed in claim 1, wherein in the step S3, the cast steel material is kept in the water explosion pool for 25-35min, the temperature of the cast steel material is reduced to 70-90 ℃, and the temperature is checked to see whether the oxide film on the outer surface of the cast steel material is removed, if so, the next step is carried out, and if not, the step S2 is repeated.
5. The treatment method for improving the wear-resistant and corrosion-resistant properties of the surface of the cast steel material as claimed in claim 1, wherein in step S4, the cast steel material after the oxide film layer is stripped off is taken out and placed in a container, acid solution is first added into the container, and the outer surface of the cast steel material is pickled, wherein the acid solution is sulfuric acid solution, the temperature of the acid solution is increased to 40-60 ℃, and the pickling is carried out for 15-25min.
6. The treatment method for improving the wear-resisting and corrosion-preventing properties of the surface of the cast steel material as claimed in claim 1, wherein in S5, after acid washing, the acid solution is drained, an alkali solution is added into the container, the alkali solution is a sodium hydroxide solution, the temperature of the alkali solution is increased to 40-60 ℃, and alkali washing is carried out on the cast steel material for 25-30min.
7. The processing method for improving the wear-resistant and corrosion-resistant properties of the surface of the cast steel material as claimed in claim 1, wherein in the step S7, after cleaning, the cast steel material is placed into the induction furnace again, heated to 530-580 ℃, and kept warm for 35-50min.
8. The treatment method for improving the wear-resisting and corrosion-resisting properties of the surface of the cast steel material as claimed in claim 1, wherein in S8, the molten salt contains cyanide and cyanate, and the surface of the cast steel material in the molten salt is subjected to nitriding treatment by using nitrogen formed by decomposition and chemical reaction of the cyanate in the molten salt.
9. The processing method for improving the wear-resistant and corrosion-resistant properties of the surface of the cast steel material as claimed in claim 1, wherein in the step S9, the nitrided cast steel material is placed in an induction furnace, the temperature in the furnace body is raised to 900-950 ℃, the temperature of the cast steel material is raised, and then the cast steel material is immersed in a liquid for quenching, further immediately raised to 320-350 ℃, and then the temperature is maintained for 1-2 hours for tempering.
10. The treatment method for improving the wear-resisting and corrosion-resisting properties of the surface of the cast steel material as claimed in claim 1, wherein in the step S12, after the test, the cast steel material is placed in a spraying device, the wear-resisting and corrosion-resisting coating is sprayed on the surface of the cast steel material, the temperature in the spraying device is raised to 65-75 ℃, and the sprayed surface is dried.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107447185A (en) * | 2017-08-15 | 2017-12-08 | 合肥正明机械有限公司 | A kind of processing method for lifting cast steel material surface abrasion resistance Anticorrosive Character |
| CN212361574U (en) * | 2020-04-15 | 2021-01-15 | 杨晶 | Corrosion-resistant light steel casting |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107447185A (en) * | 2017-08-15 | 2017-12-08 | 合肥正明机械有限公司 | A kind of processing method for lifting cast steel material surface abrasion resistance Anticorrosive Character |
| CN212361574U (en) * | 2020-04-15 | 2021-01-15 | 杨晶 | Corrosion-resistant light steel casting |
Non-Patent Citations (1)
| Title |
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| 叶奕森，张珂，李良果译: "《联邦德国的清洁工艺》", vol. 1, 中国环境科学出版社, pages: 97 - 104 * |
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