CN109468451B - Heat treatment method of 55NiCrMoV7 roller way roller - Google Patents
Heat treatment method of 55NiCrMoV7 roller way roller Download PDFInfo
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- CN109468451B CN109468451B CN201811519239.4A CN201811519239A CN109468451B CN 109468451 B CN109468451 B CN 109468451B CN 201811519239 A CN201811519239 A CN 201811519239A CN 109468451 B CN109468451 B CN 109468451B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 113
- 230000001939 inductive effect Effects 0.000 claims abstract description 106
- 238000001816 cooling Methods 0.000 claims abstract description 66
- 238000010791 quenching Methods 0.000 claims abstract description 66
- 230000000171 quenching Effects 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000005496 tempering Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 23
- 229920002456 HOTAIR Polymers 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000002035 prolonged Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll 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
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
-
- 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
-
- 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
- C21D2221/00—Treating localised areas of an article
- C21D2221/10—Differential treatment of inner with respect to outer regions, e.g. core and periphery, respectively
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to a heat treatment method of a 55NiCrMoV7 roller way roller, belonging to the technical field of roller heat treatment. The method comprises the following process steps of 1) induction preheating: carrying out induction heating on the roller in a quenching machine tool, and heating to 500-700 ℃ to finish preheating of the whole roller body; 2) and induction heating: heating the preheated roller to 840-940 ℃ for full austenitization, and preserving heat; 3) pre-cooling: pre-cooling the roller to 760-810 ℃; 4) water cooling: water cooling the pre-cooled roller to 40-110 ℃; 5) and medium temperature tempering: and heating the roller to 350-450 ℃, preserving the heat for 15-25 h, and cooling in air. The roller way roller produced by the heat treatment method has the advantages of good wear resistance, improved accident resistance, high corrosion resistance, prolonged service life, reduced use cost and good comprehensive use performance in use. The invention has low energy consumption and low production cost.
Description
Technical Field
The invention relates to a heat treatment method of a 55NiCrMoV7 roller way roller, belonging to the technical field of roller heat treatment.
Background
With the continuous casting and rolling and the increasing production items of wide and thick plates in steel mills, higher requirements are put forward on the roller way roller manufacturing technology of large-scale ultra-long rollers. 48 rolling mills are needed in the production of steel-making continuous casting of the roller way rolls, the consumption is high, and the service life and the quality of the roller way rolls have direct influence on the improvement of the product quality and the production capacity. In the high-speed load operation, a roller way roller is in contact with a high-temperature plate blank, the roller surface is abraded due to oxidation, oxide scale and other solid particles, the roller needs to be stopped and unloaded for repair, in addition, under the action of rolling contact fatigue under heavy load and high-frequency large-load cyclic stress, fatigue cracks are induced and continuously extend and expand, and finally, local peeling or severe peeling is caused, and the roller cannot be normally used.
In order to improve the wear resistance, fatigue resistance and crack resistance of the roll surface and prolong the service life of the roll surface, the material of the roller is made of 55NiCrMoV7 hot-work die steel, the hardness of the roll body is HRC46-52, the depth of a hardening layer is 10mm, and a plurality of wire holes are distributed on the end surface of the roll neck for cooling.
According to the traditional process, the 55NiCrMoV7 hot-work die steel piece is integrally quenched, the roll body and the roll neck are quenched together, but the end face wire hole of the roll neck is not suitable for processing after quenching; if the whole quenching wire hole is deformed or cracked after drilling and tapping are carried out firstly, the precision of the roller bed roller is influenced. And the oil cooling hardness is low when the quenching is integrally heated, the environment is polluted, oil stains need to be cleaned, the labor intensity of operators is high, and the quenching oil generates fire hazard.
Disclosure of Invention
The invention aims to provide a heat treatment method of a 55NiCrMoV7 roller way roller, which solves the technical problems, improves the wear resistance and the service performance of the roller way roller and is convenient to process and manufacture.
In order to achieve the purpose, the invention adopts the technical scheme that:
a heat treatment method of a 55NiCrMoV7 roller way roller comprises the following process steps,
1) induction preheating: carrying out induction heating on the roller in a quenching machine tool, and heating to 500-700 ℃ to finish preheating of the whole roller body;
2) and induction heating: heating the preheated roller to 840-940 ℃ for full austenitization, and preserving heat;
3) pre-cooling: pre-cooling the roller to 760-810 ℃;
4) water cooling: water cooling the pre-cooled roller to 40-110 ℃;
5) and medium temperature tempering: and heating the roller to 300-480 ℃, preserving the heat for 15-25 h, and cooling in air.
The technical scheme of the invention is further improved as follows: in the step 1 and the step 2, the roller is heated on an intermediate frequency quenching machine tool, and the induction frequency is 200-1000 Hz.
The technical scheme of the invention is further improved as follows: in the step 4, a water sprayer is used for cooling the roller, and the water pressure of the water sprayer is 4-6 mpa, and the water quantity is 60-160 m3/h。
The technical scheme of the invention is further improved as follows: the pre-cooling in step 3 is cooling in air.
The technical scheme of the invention is further improved as follows: and 5, using a hot air circulation tempering furnace in the tempering.
The technical scheme of the invention is further improved as follows: and in the step 1 and the step 2, the roll body of the roll is circularly and inductively preheated and inductively heated at the running speed of 30-100 mm/min.
The technical scheme of the invention is further improved as follows: and (3) keeping the temperature for 3-8 min in the step (2).
Due to the adoption of the technical scheme, the invention has the following technical effects:
according to the invention, induction preheating is carried out firstly, and then induction heating is carried out, so that the sufficient, uniform and consistent induction heating of the roller way roller can be ensured, and the depth and hardness uniformity of the hardening layer of the roller way roller can be ensured.
The invention adopts the induction hardening machine tool to control the heating part of the roller body, can control the induction hardening machine tool to reduce the quenching influence on the end surface of the roller neck of the roller way roller in the quenching process, is convenient for the thread hole processing on the end surface of the roller neck, and is particularly suitable for the integral processing production of the roller way roller.
The cooling process adopts a mode of combining pre-cooling and water cooling in air, so that the roller table roller can be prevented from cracking, the generation of stress is reduced, and the yield and the quality of products are improved.
The quenching method adopts the hot air circulation tempering furnace for tempering treatment, so that the heating efficiency can be improved, and the heat utilization rate can be improved.
The roller way roller produced by the heat treatment method has the advantages of good wear resistance, improved accident resistance, high corrosion resistance, prolonged service life, reduced use cost and good comprehensive use performance in use.
Detailed Description
The present invention will be described in further detail with reference to specific examples below:
the invention discloses a heat treatment method of a 55NiCrMoV7 roller way roller, wherein the roller way roller is made of 55NiCrMoV7 hot-work die steel, and a quenching method is designed to meet the use performance. The following are specific examples:
a heat treatment method of a 55NiCrMoV7 roller way roller comprises the following process steps,
1) induction preheating: carrying out induction heating on the roller in a quenching machine tool, and heating to 500-700 ℃ to finish preheating of the whole roller body; the quenching machine tool used in the step is an intermediate frequency quenching machine tool, the operation speed of 30-100 mm/min is adopted, the reciprocating linear motion is carried out along the roller body, the roller body of the roller is subjected to circulating induction preheating, and the induction frequency is 200-1000 Hz.
2) And induction heating: and heating the preheated roller to 840-940 ℃ for full austenitization, and keeping the temperature for a period of time, wherein the specific heat preservation time is 3-8 min. In the step, induction heating is still carried out on the medium-frequency quenching machine tool in the first step, the roller body of the roller is circularly and inductively heated by adopting the running speed of 30-100 mm/min and reciprocating linear motion along the roller body, and the induction frequency is 200-1000 Hz.
3) Pre-cooling: pre-cooling the roller to 760-810 ℃; the pre-cooling is typically in air.
4) Water cooling: water cooling the pre-cooled roller to 40-110 ℃; the step is to cool the roller by a water sprayer with water pressure of 4-6 mpa and water quantity of 60-160 m3/h。
5) And medium temperature tempering: and heating the roller to 300-480 ℃, preserving the heat for 15-25 h, and cooling in air. The tempering treatment in this step uses a hot air circulation tempering furnace.
According to the invention, the induction quenching machine tool is used for heating to replace a trolley furnace, the induction quenching heating speed of the roller body is high, quenching oil cooling is replaced by water cooling, and medium-temperature tempering is adopted for tempering, so that the stable quenching quality can be ensured, the quenching stress of the roller is reduced, the service performance is improved, and the requirements of energy conservation and emission reduction are met.
The invention can control the heating part of the roller body by adopting the induction hardening machine tool, can control the induction hardening machine tool to reduce the quenching influence on the end face of the roller neck of the roller way roller in the quenching process, and is convenient for processing the thread hole on the end face of the roller neck.
The invention designs a quenching method aiming at the material characteristics of 55NiCrMoV7 and combining the performance requirements of the roller way roller on the wear resistance, fatigue resistance and crack resistance of the roller surface, wherein the design of the process parameters of the heating temperature and the heat preservation time can ensure that the material of 55NiCrMoV7 meets the use requirements of the roller way roller. The induction preheating and induction heating design in the invention can ensure the sufficient, uniform and consistent heating of the roller way roller. The cooling process adopts a mode of combining precooling in air and water cooling, so that the roller bed roller can be prevented from cracking, the generation of stress is reduced, and the product quality is improved.
In the induction heating process, the heating speed and the induction frequency of the induction coil are designed to ensure that the roller way roller is not damaged due to overheating, and the roller can be heated to the specified temperature within the specified proper time. When the heating speed and the induction frequency of the induction coil are selected, the larger the diameter of the roller bed roller is, the slower the heating speed of the induction coil is, and the roller bed roller body can be heated at a certain depth; the smaller the induction frequency, the more the overheating is prevented.
Example 1
The roller bed roller of 55NiCrMoV7 had a diameter of 273mm and a length of 500 mm. The quenching process comprises the following steps:
1) induction preheating: and (3) carrying out induction heating on the roller on a medium-frequency quenching machine tool, wherein the roller does reciprocating linear motion along the roller body at the running speed of 75 mm/min in the induction heating process, and the roller body of the roller is subjected to circulating induction preheating at the induction frequency of 750 Hz. Induction preheating is carried out to 500 ℃, and the preheating of the whole roller body is completed.
2) And induction heating: and continuously using the medium-frequency quenching machine tool for induction heating, wherein the running speed of 75 mm/min is adopted in the induction heating process, the roller body does reciprocating linear motion along the roller body, the roller body of the roller is subjected to circulating induction heating, and the induction frequency is 830 Hz. Heating the roller to 850 ℃ to fully austenize, and keeping the temperature for 6 min.
3) Pre-cooling: the roll was cooled to 780 ℃ in air.
4) Water cooling: and (3) spraying water to the roller body of the pre-cooled roller by using a water sprayer for cooling, and cooling to 50 ℃. The water pressure of the water sprayer is controlled to be 4mpa, and the water quantity is controlled to be 60m3/h。
5) And medium temperature tempering: and heating the roller to 300 ℃ by using a hot air circulation tempering furnace, preserving the heat for 15h, and then air-cooling to room temperature to finish the tempering treatment. The whole heat treatment process is finished.
The roller after heat treatment is detected, the quenching hardness of the roller body of the product is HRC49, the depth of the quenching layer is 10mm, and the hardness uniformity, the deformation and the like meet the design requirements. And (4) detecting that the metallographic structure is normal, and the quenching stress is compressive stress and meets the use requirement.
Example 2
The roller bed roller of 55NiCrMoV7 was 205mm in diameter and 600mm in length. The quenching process comprises the following steps:
1) induction preheating: and (3) carrying out induction heating on the roller on a medium-frequency quenching machine tool, wherein the running speed of 55 mm/min is adopted in the induction heating process, the roller does reciprocating linear motion along the roller body, the roller body of the roller is subjected to circulating induction preheating, and the induction frequency is 530 Hz. And induction preheating is carried out to 580 ℃, and preheating of the whole roll body is completed.
2) And induction heating: and continuously using the medium-frequency quenching machine tool for induction heating, wherein the running speed of 52 mm/min is adopted in the induction heating process, the roller body does reciprocating linear motion, the roller body of the roller is subjected to circulating induction preheating, and the induction frequency is 560 Hz. Heating the roller to 880 ℃ to fully austenize, and preserving heat for 5.5 min.
3) Pre-cooling: the roll was cooled to 765 ℃ in air.
4) Water cooling: and (4) spraying water to the pre-cooled roller by using a water sprayer for cooling, and cooling to 65 ℃. The water pressure of the water sprayer is controlled to be 4.5mpa, and the water quantity is controlled to be 78m3/h。
5) And medium temperature tempering: and heating the roller to 396 ℃ by using a hot air circulation tempering furnace, preserving heat for 18.5 hours, and then air-cooling to room temperature to finish tempering treatment. The whole heat treatment process is finished.
The roller after heat treatment is detected, the quenching hardness of the roller body of the product is HRC49, the depth of the quenching layer is 11mm, and the hardness uniformity, the deformation and the like meet the design requirements. And (4) detecting that the metallographic structure is normal, and the quenching stress is compressive stress and meets the use requirement.
Example 3
The roller bed roller of 55NiCrMoV7 was 255mm in diameter and 1000mm in length. The quenching process comprises the following steps:
1) induction preheating: and (3) carrying out induction heating on the roller on a medium-frequency quenching machine tool, wherein the running speed of 30 mm/min is adopted in the induction heating process, the roller does reciprocating linear motion along the roller body, the roller body of the roller is subjected to circulating induction preheating, and the induction frequency is 200 Hz. Induction preheating is carried out to 700 ℃, and the preheating of the whole roller body is completed.
2) And induction heating: and continuously using the medium-frequency quenching machine tool for induction heating, wherein the running speed of 30 mm/min is adopted in the induction heating process, the roller body does reciprocating linear motion along the roller body, the roller body of the roller is subjected to circulating induction preheating, and the induction frequency is 200 Hz. Heating the roller to 940 deg.C for austenitizing, and keeping the temperature for 4.5 min.
3) Pre-cooling: the rolls were cooled in air to 810 ℃.
4) Water cooling: and (3) spraying water to the roller body of the pre-cooled roller by using a water sprayer for cooling, and cooling to 110 ℃. The water pressure of the water sprayer is controlled to be 6mpa, and the water quantity is controlled to be 160m3/h。
5) And medium temperature tempering: and heating the roller to 425 ℃ by using a hot air circulation tempering furnace, preserving the heat for 25 hours, and then air-cooling to room temperature to finish the tempering treatment. The whole heat treatment process is finished.
The heat-treated roller is detected, the quenching hardness of the roller body of the product is HRC50, the depth of the quenching layer is 10.6mm, the hardness uniformity and the deformation amount of the product meet the design requirements. And (4) detecting that the metallographic structure is normal, and the quenching stress is compressive stress and meets the use requirement.
Example 4
The roller bed roller of 55NiCrMoV7 was 155mm in diameter and 800mm in length. The quenching process comprises the following steps:
1) induction preheating: and (3) carrying out induction heating on the roller on a medium-frequency quenching machine tool, wherein the roller does reciprocating linear motion along the roller body at the running speed of 35 mm/min in the induction heating process, and the roller body of the roller is subjected to circulating induction preheating at the induction frequency of 230 Hz. And induction preheating is carried out to 680 ℃, and preheating of the whole roller body is completed.
2) And induction heating: and continuously using the medium-frequency quenching machine tool for induction heating, wherein the running speed of 30 mm/min is adopted in the induction heating process, the roller body is in reciprocating linear motion along the roller body, the roller body of the roller is subjected to induction heating, and the induction frequency is 260 Hz. Heating the roller to 920 ℃ to fully austenize, and preserving heat for 5.5 min.
3) Pre-cooling: the rolls were cooled in air to 795 ℃.
4) Water cooling: and (4) spraying water to the pre-cooled roller by using a water sprayer for cooling, and cooling to 100 ℃. The water pressure of the water sprayer is controlled to be 4.5mpa, and the water quantity is controlled to be 150m3/h。
5) And medium temperature tempering: and heating the roller to 450 ℃ by using a hot air circulation tempering furnace, preserving the heat for 23.5 hours, and then air-cooling to room temperature to finish the tempering treatment. The whole heat treatment process is finished.
The heat-treated roller is detected, the quenching hardness of the roller body of the product is HRC46, the depth of the quenching layer is 12.3mm, the hardness uniformity and the deformation amount of the product meet the design requirements. And (4) detecting that the metallographic structure is normal, and the quenching stress is compressive stress and meets the use requirement.
Example 5
The roller bed roller of 55NiCrMoV7 was 303mm in diameter and 650mm in length. The quenching process comprises the following steps:
1) induction preheating: and (3) carrying out induction heating on the roller on a medium-frequency quenching machine tool, wherein the running speed of the roller is 100 mm/min in the induction heating process, the roller does reciprocating linear motion along the roller body, the roller body of the roller is subjected to circulating induction preheating, and the induction frequency is 1000 Hz. And (4) induction preheating is carried out until the temperature is heated to 680 ℃, and preheating of the whole roller body is completed.
2) And induction heating: and continuously using the medium-frequency quenching machine tool for induction heating, wherein the running speed of 100 mm/min is adopted in the induction heating process, the roller body is in reciprocating linear motion along the roller body, the roller body of the roller is subjected to induction heating, and the induction frequency is 1000 Hz. The roller is heated to 868 ℃ to fully austenize, and the temperature is kept for 6 min.
3) Pre-cooling: the rolls were cooled in air to 776 ℃.
4) Water cooling: and (4) spraying water to the pre-cooled roller by using a water sprayer for cooling, and cooling to 40 ℃. The water pressure of the water sprayer is controlled to be 5mpa, and the water quantity is controlled to be 132m3/h。
5) And medium temperature tempering: and heating the roller to 390 ℃ by using a hot air circulation tempering furnace, preserving the heat for 17.5 hours, and then air-cooling to room temperature to finish the tempering treatment. The whole heat treatment process is finished.
The roller after heat treatment is detected, the quenching hardness of the roller body of the product is HRC50, the depth of the quenching layer is 10.4mm, and the hardness uniformity, the deformation and the like reach the design requirements. And (4) detecting that the metallographic structure is normal, and the quenching stress is compressive stress and meets the use requirement.
Example 6
The roller bed roller of 55NiCrMoV7 was 183mm in diameter and 530mm in length. The quenching process comprises the following steps:
1) induction preheating: and (3) carrying out induction heating on the roller on a medium-frequency quenching machine tool, wherein the operation speed of 78 mm/min is adopted in the induction heating process, the roller does reciprocating linear motion along the roller body, the roller body of the roller is subjected to circulating induction preheating, and the induction frequency is 520 Hz. Induction preheating is carried out until the temperature is 840 ℃, and the preheating of the whole roller body is completed.
2) And induction heating: and continuously using the medium-frequency quenching machine tool for induction heating, wherein the running speed of 100 mm/min is adopted in the induction heating process, the roller body is in reciprocating linear motion along the roller body, the roller body of the roller is subjected to induction heating, and the induction frequency is 1000 Hz. The roller is heated to 868 ℃ to fully austenize, and the temperature is kept for 6 min.
3) Pre-cooling: the rolls were cooled in air to 776 ℃.
4) Water cooling: and (4) spraying water to the pre-cooled roller by using a water sprayer for cooling, and cooling to 40 ℃. The water pressure of the water sprayer is controlled to be 5mpa, and the water quantity is controlled to be 122m3/h。
5) And medium temperature tempering: and heating the roller to 480 ℃ by using a hot air circulation tempering furnace, preserving heat for 17.5 hours, and then air-cooling to room temperature to finish tempering treatment. The whole heat treatment process is finished.
The roller after heat treatment is detected, the quenching hardness of the roller body of the product is HRC50, the depth of the quenching layer is 10.4mm, and the hardness uniformity, the deformation and the like reach the design requirements. And (4) detecting that the metallographic structure is normal, and the quenching stress is compressive stress and meets the use requirement.
The roller way rollers have good wear resistance, improved accident resistance, high corrosion resistance, prolonged service life, reduced use cost and good comprehensive use performance in use.
According to the heat treatment method disclosed by the invention, the labor intensity of heat treatment operators is reduced, the labor time for unpacking the roll neck and cleaning oil stains is saved, and energy-saving, emission-reducing, safe and environment-friendly heat treatment can be realized. The heat treatment method has stable production quality and improved production efficiency. The invention has low energy consumption and low production cost.
The invention adopts a novel induction quenching method, has stable quenching quality, reduced quenching stress, high and uniform quenching hardness, and simple and safe operation compared with the conventional integral heating.
Claims (4)
1. A heat treatment method of a 55NiCrMoV7 roller way roller is characterized by comprising the following steps: comprises the following process steps of the following steps,
1) induction preheating: carrying out induction heating on the roller in a quenching machine tool, and heating to 580-700 ℃ to finish preheating of the whole roller body; carrying out circulating induction preheating on the roller body of the roller at the running speed of 30-100 mm/min; the step is carried out on an intermediate frequency quenching machine tool for heating, and the induction frequency is 200-1000 Hz;
2) and induction heating: heating the preheated roller to 840-940 ℃ for full austenitization, and preserving heat; performing circulating induction heating on the roller body of the roller at the running speed of 30-100 mm/min; the step is carried out on an intermediate frequency quenching machine tool for heating, and the induction frequency is 200-1000 Hz;
3) pre-cooling: pre-cooling the roller to 760-810 ℃; pre-cooling is cooling in air;
4) water cooling: water cooling the pre-cooled roller to 40-110 ℃;
5) and medium temperature tempering: and heating the roller to 300-480 ℃, preserving the heat for 15-25 h, and cooling in air.
2. The heat treatment method of a 55NiCrMoV7 roller bed roller according to claim 1, characterized in that: in the step 4, a water sprayer is used for cooling the roller, the water pressure of the water sprayer is 4-6 MPa, and the water quantity is 60-160 m3/h。
3. The heat treatment method of a 55NiCrMoV7 roller bed roller according to claim 1, characterized in that: and 5, using a hot air circulation tempering furnace in the tempering.
4. The heat treatment method of a 55NiCrMoV7 roller bed roller according to claim 1, characterized in that: and (3) keeping the temperature for 3-8 min in the step (2).
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005272881A (en) * | 2004-03-23 | 2005-10-06 | High Frequency Heattreat Co Ltd | Method for hardening outer surface of cylindrical material |
| CN104775009A (en) * | 2014-01-14 | 2015-07-15 | 宝山钢铁股份有限公司 | Heating method during quenching of large supporting roller |
| CN105171362A (en) * | 2015-11-02 | 2015-12-23 | 宝钢轧辊科技有限责任公司 | Method for manufacturing Sendzimir intermediate roll |
| CN105483354A (en) * | 2015-12-23 | 2016-04-13 | 中钢集团邢台机械轧辊有限公司 | Heat treatment method for large high-speed steel cold-rolled work roll |
| CN105543459A (en) * | 2015-12-24 | 2016-05-04 | 湖南力升轧辊有限公司 | Composite quenching method of Cr12MoV roller |
| CN108130403A (en) * | 2017-12-25 | 2018-06-08 | 中钢集团邢台机械轧辊有限公司 | A kind of impewdance matching processing method of Cr12 rolls |
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| DE102009026251A1 (en) * | 2009-07-24 | 2011-02-03 | Thyssenkrupp Steel Europe Ag | Method and device for energy-efficient hot forming |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005272881A (en) * | 2004-03-23 | 2005-10-06 | High Frequency Heattreat Co Ltd | Method for hardening outer surface of cylindrical material |
| CN104775009A (en) * | 2014-01-14 | 2015-07-15 | 宝山钢铁股份有限公司 | Heating method during quenching of large supporting roller |
| CN105171362A (en) * | 2015-11-02 | 2015-12-23 | 宝钢轧辊科技有限责任公司 | Method for manufacturing Sendzimir intermediate roll |
| CN105483354A (en) * | 2015-12-23 | 2016-04-13 | 中钢集团邢台机械轧辊有限公司 | Heat treatment method for large high-speed steel cold-rolled work roll |
| CN105543459A (en) * | 2015-12-24 | 2016-05-04 | 湖南力升轧辊有限公司 | Composite quenching method of Cr12MoV roller |
| CN108130403A (en) * | 2017-12-25 | 2018-06-08 | 中钢集团邢台机械轧辊有限公司 | A kind of impewdance matching processing method of Cr12 rolls |
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