CN112760656A - Heat treatment method for metal plate - Google Patents

Heat treatment method for metal plate Download PDF

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Publication number
CN112760656A
CN112760656A CN202011548227.1A CN202011548227A CN112760656A CN 112760656 A CN112760656 A CN 112760656A CN 202011548227 A CN202011548227 A CN 202011548227A CN 112760656 A CN112760656 A CN 112760656A
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China
Prior art keywords
metal plate
cooling
temperature
tempering
furnace
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202011548227.1A
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Chinese (zh)
Inventor
崔桂生
运起健
吴明明
张连辉
张宝华
于晓雷
高显胜
李泽宇
樊艳权
孝本康
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Tianjin Yuefeng Technology Co ltd
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Tianjin Yuefeng Technology Co ltd
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Priority to CN202011548227.1A priority Critical patent/CN112760656A/en
Publication of CN112760656A publication Critical patent/CN112760656A/en
Withdrawn legal-status Critical Current

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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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
    • 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
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • 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
    • C21D1/26—Methods of annealing
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • 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
    • C23C8/06—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 gases
    • C23C8/08—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 gases only one element being applied
    • C23C8/24—Nitriding
    • 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
    • C21D2261/00—Machining or cutting being involved

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

The invention relates to a heat treatment method of a metal plate, which comprises the following steps: (1) cleaning; (2) annealing; (3) tempering; (4) coarse grinding; (5) nitriding; (6) fine processing; (7) and (5) secondary cleaning. The method is adopted to carry out heat treatment on the metal plate, so that the performance of the metal plate is improved conveniently, the strength and the wear resistance of the metal plate are improved, the service life of the metal plate is prolonged, and the heat treatment method is simple and clear in working procedures and convenient to operate.

Description

Heat treatment method for metal plate
Technical Field
The invention relates to the field of heat treatment of metal pieces, in particular to a heat treatment method of a metal plate.
Background
Heat treatment of metals is one of the important processes in mechanical manufacturing, and heat treatment generally does not change the shape and overall chemical composition of the workpiece, but imparts or improves the performance properties of the workpiece by changing the microstructure inside the workpiece, or changing the chemical composition of the surface of the workpiece, as compared to other machining processes. The method is characterized in that the inherent quality of the workpiece is improved, which is not generally seen by naked eyes, so that the method is a special technological process in mechanical manufacturing and is also an important link of quality management. The metal plate can be used as a processing part and an equipment shell, has wider application range and higher performance requirement, and therefore, a heat treatment method for the metal plate with simple, clear and definite working procedures is needed.
Disclosure of Invention
The present invention is directed to solving the above problems and provides a method for heat treating a metal plate.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heat treatment method for a metal plate comprises the following steps:
(1) cleaning: cleaning the surface of the metal plate and putting the metal plate into a drying box for drying;
(2) annealing: placing the metal plate into a heating furnace, heating to 720-820 ℃, then transferring the metal plate into an air furnace, preserving the heat for a period of time, and then slowly cooling to the temperature below 500 ℃ along with the furnace, and cooling to room temperature in the air;
(3) tempering: placing the annealed metal plate into a quenching furnace for high-temperature quenching for 130-230min, then preserving heat for 60-80min, cooling to room temperature twice after heat preservation, then heating the quenching furnace again, placing the metal plate into the quenching furnace for tempering for 40-80min, and cooling to room temperature after tempering;
(4) coarse grinding: carrying out coarse grinding treatment on the surface of the quenched and tempered metal plate to remove obvious defects on the surface of the metal plate;
(5) nitriding: vacuumizing the heating furnace, then filling nitrogen, uniformly heating to 530-560 ℃, filling oxygen in a nitrogen atmosphere, and nitriding for 24-28 h;
(6) finish machining: carrying out fine grinding treatment and polishing treatment on the surface of the nitrided metal plate in sequence to enable the surface to meet the design requirement;
(7) secondary cleaning: and cleaning the metal plate after fine grinding to remove surface dust, and then putting the metal plate into a drying box for drying.
Particularly, the temperature of the drying box in the step (1) and the step (7) is 70-80 ℃, and the drying time is 25-35 min.
Particularly, the heat preservation temperature in the step (2) is 580-640 ℃, and the heat preservation time is 30-45 min.
Particularly, the quenching temperature in the step (3) is 830-890 ℃, and the tempering temperature is 650-680 ℃.
Particularly, the primary cooling mode after quenching in the step (3) is air cooling, the air cooling time is 15-20min, the secondary cooling mode is rapid cooling in a cooling medium, and the cooling medium is a polyvinyl alcohol aqueous solution.
Particularly, the cooling mode after tempering in the step (3) is water cooling.
Specifically, the volume ratio of nitrogen to oxygen in the step (5) is 4: 1.
the invention has the beneficial effects that: the method is adopted to carry out heat treatment on the metal plate, so that the performance of the metal plate is improved conveniently, the strength and the wear resistance of the metal plate are improved, the service life of the metal plate is prolonged, and the heat treatment method is simple and clear in working procedures and convenient to operate.
Detailed Description
The invention is further illustrated by the following examples:
example 1
The heat treatment method of the metal plate comprises the following steps:
(1) cleaning: cleaning the surface of the metal plate and putting the metal plate into a drying box for drying;
(2) annealing: placing the metal plate into a heating furnace, heating to 720 ℃, then transferring to an air furnace, preserving heat for a period of time, then slowly cooling to below 500 ℃ along with the furnace, and cooling to room temperature in the air;
(3) tempering: putting the annealed metal plate into a quenching furnace for high-temperature quenching for 130min, then preserving heat for 60min, cooling to room temperature twice after heat preservation, then heating the quenching furnace again, putting the metal plate into the quenching furnace for tempering for 40min, and cooling to room temperature after tempering;
(4) coarse grinding: carrying out coarse grinding treatment on the surface of the quenched and tempered metal plate to remove obvious defects on the surface of the metal plate;
(5) nitriding: vacuumizing the heating furnace, then filling nitrogen, uniformly heating to 530 ℃, filling oxygen in the nitrogen atmosphere, and nitriding for 24 hours;
(6) finish machining: carrying out fine grinding treatment and polishing treatment on the surface of the nitrided metal plate in sequence to enable the surface to meet the design requirement;
(7) secondary cleaning: and cleaning the metal plate after fine grinding to remove surface dust, and then putting the metal plate into a drying box for drying.
Particularly, the temperature of the drying box in the step (1) and the step (7) is 70 ℃, and the drying time is 25 min.
Particularly, the heat preservation temperature in the step (2) is 580 ℃, and the heat preservation time is 30 min.
Particularly, the quenching temperature in the step (3) is 830 ℃, and the tempering temperature is 650 ℃.
Particularly, the primary cooling mode after quenching in the step (3) is air cooling, the air cooling time is 15min, the secondary cooling mode is rapid cooling in a cooling medium, and the cooling medium is a polyvinyl alcohol aqueous solution.
Particularly, the cooling mode after tempering in the step (3) is water cooling.
Specifically, the volume ratio of nitrogen to oxygen in the step (5) is 4: 1.
example 2
The heat treatment method of the metal plate comprises the following steps:
(1) cleaning: cleaning the surface of the metal plate and putting the metal plate into a drying box for drying;
(2) annealing: placing the metal plate into a heating furnace, heating to 820 ℃, then transferring into an air furnace, preserving heat for a period of time, then slowly cooling to below 500 ℃ along with the furnace, and cooling to room temperature in the air;
(3) tempering: placing the annealed metal plate into a quenching furnace for high-temperature quenching for 230min, then preserving heat for 80min, cooling to room temperature twice after heat preservation, then heating the quenching furnace again, placing the metal plate into the quenching furnace for tempering for 80min, and cooling to room temperature after tempering;
(4) coarse grinding: carrying out coarse grinding treatment on the surface of the quenched and tempered metal plate to remove obvious defects on the surface of the metal plate;
(5) nitriding: vacuumizing the heating furnace, then filling nitrogen, uniformly heating to 560 ℃, filling oxygen in the nitrogen atmosphere, and nitriding for 28 hours;
(6) finish machining: carrying out fine grinding treatment and polishing treatment on the surface of the nitrided metal plate in sequence to enable the surface to meet the design requirement;
(7) secondary cleaning: and cleaning the metal plate after fine grinding to remove surface dust, and then putting the metal plate into a drying box for drying.
Particularly, the temperature of the drying box in the step (1) and the step (7) is 80 ℃, and the drying time is 35 min.
Particularly, the heat preservation temperature in the step (2) is 640 ℃, and the heat preservation time is 45 min.
In particular, the quenching temperature in the step (3) is 890 ℃, and the tempering temperature is 680 ℃.
Particularly, the primary cooling mode after quenching in the step (3) is air cooling, the air cooling time is 20min, and the secondary cooling mode is rapid cooling in a cooling medium, wherein the cooling medium is a polyvinyl alcohol aqueous solution.
Particularly, the cooling mode after tempering in the step (3) is water cooling.
Specifically, the volume ratio of nitrogen to oxygen in the step (5) is 4: 1. example 3
The heat treatment method of the metal plate comprises the following steps:
(1) cleaning: cleaning the surface of the metal plate and putting the metal plate into a drying box for drying;
(2) annealing: placing the metal plate into a heating furnace, heating to 770 ℃, then transferring to an air furnace, preserving heat for a period of time, then slowly cooling to below 500 ℃ along with the furnace, and cooling to room temperature in the air;
(3) tempering: putting the annealed metal plate into a quenching furnace for high-temperature quenching for 180min, then preserving heat for 70min, cooling to room temperature twice after heat preservation, then heating the quenching furnace again, putting the metal plate into the quenching furnace for tempering for 60min, and cooling to room temperature after tempering;
(4) coarse grinding: carrying out coarse grinding treatment on the surface of the quenched and tempered metal plate to remove obvious defects on the surface of the metal plate;
(5) nitriding: vacuumizing the heating furnace, then filling nitrogen, uniformly heating to 545 ℃, and filling oxygen in a nitrogen atmosphere for 26 hours;
(6) finish machining: carrying out fine grinding treatment and polishing treatment on the surface of the nitrided metal plate in sequence to enable the surface to meet the design requirement;
(7) secondary cleaning: and cleaning the metal plate after fine grinding to remove surface dust, and then putting the metal plate into a drying box for drying.
Particularly, the temperature of the drying box in the step (1) and the step (7) is 75 ℃, and the drying time is 25-35 min.
Particularly, the heat preservation temperature in the step (2) is 610 ℃, and the heat preservation time is 38 min.
In particular, the quenching temperature in the step (3) is 860 ℃, and the tempering temperature is 665 ℃.
Particularly, the primary cooling mode after quenching in the step (3) is air cooling, the air cooling time is 18min, the secondary cooling mode is rapid cooling in a cooling medium, and the cooling medium is a polyvinyl alcohol aqueous solution.
Particularly, the cooling mode after tempering in the step (3) is water cooling.
Specifically, the volume ratio of nitrogen to oxygen in the step (5) is 4: 1.
the invention has been described in an illustrative manner, and it is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover various modifications, which may be made by the methods and technical solutions of the invention, or may be applied to other applications without modification.

Claims (7)

1. A heat treatment method for a metal plate is characterized by comprising the following steps:
(1) cleaning: cleaning the surface of the metal plate and putting the metal plate into a drying box for drying;
(2) annealing: placing the metal plate into a heating furnace, heating to 720-820 ℃, then transferring the metal plate into an air furnace, preserving the heat for a period of time, and then slowly cooling to the temperature below 500 ℃ along with the furnace, and cooling to room temperature in the air;
(3) tempering: placing the annealed metal plate into a quenching furnace for high-temperature quenching for 130-230min, then preserving heat for 60-80min, cooling to room temperature twice after heat preservation, then heating the quenching furnace again, placing the metal plate into the quenching furnace for tempering for 40-80min, and cooling to room temperature after tempering;
(4) coarse grinding: carrying out coarse grinding treatment on the surface of the quenched and tempered metal plate to remove obvious defects on the surface of the metal plate;
(5) nitriding: vacuumizing the heating furnace, then filling nitrogen, uniformly heating to 530-560 ℃, filling oxygen in a nitrogen atmosphere, and nitriding for 24-28 h;
(6) finish machining: carrying out fine grinding treatment and polishing treatment on the surface of the nitrided metal plate in sequence to enable the surface to meet the design requirement;
(7) secondary cleaning: and cleaning the metal plate after fine grinding to remove surface dust, and then putting the metal plate into a drying box for drying.
2. The method for heat-treating sheet metal elements according to claim 1, wherein the oven temperature in said steps (1) and (7) is 70-80 ℃ and the oven time is 25-35 min.
3. The method as claimed in claim 1, wherein the temperature in step (2) is 580- > 640 ℃, and the time for the temperature is 30-45 min.
4. The method as claimed in claim 1, wherein the quenching temperature in step (3) is 830-890 ℃, and the tempering temperature is 650-680 ℃.
5. The heat treatment method for the metal plate as claimed in claim 1, wherein the primary cooling after quenching in the step (3) is air cooling for 15-20min, and the secondary cooling is rapid cooling in a cooling medium which is an aqueous solution of polyvinyl alcohol.
6. A method for heat treating a metal plate as claimed in claim 1, wherein the cooling after tempering in step (3) is water cooling.
7. A method for the heat treatment of sheet metal elements according to claim 1, characterized in that in step (5) the volume ratio of nitrogen to oxygen is 4: 1.
CN202011548227.1A 2020-12-24 2020-12-24 Heat treatment method for metal plate Withdrawn CN112760656A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007321198A (en) * 2006-05-31 2007-12-13 Nano Gijutsu Kenkyusho:Kk Surface hardened transition metal material and its production method
CN109706297A (en) * 2019-03-04 2019-05-03 襄阳新东特锻造有限公司 A kind of H13 mould steel heat treatment method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007321198A (en) * 2006-05-31 2007-12-13 Nano Gijutsu Kenkyusho:Kk Surface hardened transition metal material and its production method
CN109706297A (en) * 2019-03-04 2019-05-03 襄阳新东特锻造有限公司 A kind of H13 mould steel heat treatment method

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Application publication date: 20210507