CN112981083A - Heat treatment method of full-hardened withdrawal and straightening roller - Google Patents
Heat treatment method of full-hardened withdrawal and straightening roller Download PDFInfo
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- CN112981083A CN112981083A CN202110191976.1A CN202110191976A CN112981083A CN 112981083 A CN112981083 A CN 112981083A CN 202110191976 A CN202110191976 A CN 202110191976A CN 112981083 A CN112981083 A CN 112981083A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
-
- 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
- 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
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
-
- 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
- C21D2221/01—End parts (e.g. leading, trailing end)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
- F27B2009/122—Preheating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
- F27B2009/124—Cooling
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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
- Y02P10/20—Recycling
Abstract
The invention relates to a heat treatment method of a pulling and straightening roller, in particular to a heat treatment method of a full-hardened pulling and straightening roller, which comprises the following steps: the method comprises the steps of firstly carrying out integral quenching and integral tempering on the pulling and straightening roller to enable the pulling and straightening roller to be completely hardened, and then carrying out end tempering on non-working areas at two ends of a working roller of the pulling and straightening roller to enable the hardness of the non-working areas at two ends of the working roller to be smaller than that of the working area of the working roller, and enabling the toughness of the non-working areas to be larger than that of the working area. The heat treatment method of the full-hardened withdrawal and straightening roller provided by the invention has the advantages that the withdrawal and straightening roller is completely hardened, the hardness of the working surface reaches HRC 61-63, the hardness is high, the wear resistance is realized, the service life is long, the surface quality of a plate can be effectively improved, the service life is more than twice of that of a common withdrawal and straightening roller, and the production cost is reduced.
Description
Technical Field
The invention relates to a heat treatment method of a pulling and straightening roller, in particular to a heat treatment method of a full-hardened pulling and straightening roller.
Background
The straightening and withdrawal machine is a very important device in a pickling line of a cold rolling plant, and is mainly used for stretching, bending and correcting the plate shape of a plate strip, so that the plate strip can be straightened, the flatness of the plate strip is greatly improved, and a good plate shape is obtained. The withdrawal and straightening machine mainly relies on the withdrawal and straightening roller for straightening, but the existing withdrawal and straightening roller has short service life, needs to be frequently replaced, influences production and causes higher production cost.
The existing pulling and straightening roller is mainly used for improving the surface hardness through heat treatment to ensure the service life, and the method comprises two treatment methods:
one is used for AISI-D2 or Cr12MoV1, and the process flow is as follows: blank → rough machining → first tempering to HRC30-34 → fine machining reserve size → surface quenching to hardness HRC63-65 → fine machining grinding → finished product and shipment; although the surface hardness reaches HRC63-65, the wear resistance is poor, the durability is low, the service life is short, and the surface needs to be replaced within 3-6 months.
The other is used for 60CrMo, and the process flow is as follows: blank → rough machining → first thermal refining HB240-280(HRC22-28) → surface quenching to reach hardness HS85-95(HRC62-67) → depth of quenching layer 2-3mm → single side of hard chromium plating 0.08-0.10 mm (hard chromium plating), although the wear resistance is increased, the hard chromium plating is worn after a period of time, the hard chromium plating needs to be carried out again, the cost is high, and the hard chromium plating is easy to fall off, thereby affecting the surface quality of plate correction.
Disclosure of Invention
In order to solve the problems, the invention provides a heat treatment method of a full-hardened pulling and straightening roller, which can harden the whole inside of the pulling and straightening roller, has high hardness, wear resistance and long service life, and can effectively improve the surface quality of a plate, and the specific technical scheme is as follows:
the heat treatment method of the full-hardened withdrawal and straightening roller comprises the following steps: the method comprises the steps of firstly carrying out integral quenching and integral tempering on the pulling and straightening roller to enable the pulling and straightening roller to be completely hardened, and then carrying out end tempering on non-working areas at two ends of a working roller of the pulling and straightening roller to enable the hardness of the non-working areas at two ends of the working roller to be smaller than that of the working area of the working roller, and enabling the toughness of the non-working areas to be larger than that of the working area.
Preferably, the bulk quenching comprises the steps of: preheating, high-temperature heating, quenching and low-temperature tempering, wherein the temperature during the high-temperature heating is 1015-1030 ℃, the heat preservation time is 20-25 min, the air during the quenching is cooled to 70-100 ℃, and the low-temperature tempering is carried out twice.
Preferably, preheat including going on in proper order, and the temperature in proper order once constant temperature that improves preheats, the secondary constant temperature preheats and the cubic constant temperature preheats: the temperature of the primary constant-temperature preheating is 350-450 ℃, and the heat preservation time is 2-3 h; the temperature of the secondary constant-temperature preheating is 550-650 ℃, and the heat preservation time is 1-2 h; the temperature of the third constant-temperature preheating is 750-850 ℃, and the heat preservation time is 0.5-1 h.
And the temperature difference between the primary constant-temperature preheating and the secondary constant-temperature preheating and the temperature difference between the secondary constant-temperature preheating and the tertiary constant-temperature preheating are both 180-220 ℃.
Preferably, the temperature of the low-temperature tempering is 150-200 ℃, and the heat preservation time is 2-4 h.
Preferably, the integral tempering comprises the following steps: tempering and preheating and high-temperature tempering; the temperature during tempering and preheating is 340-380 ℃, and the heat preservation time is 2-3 h; the temperature during high-temperature tempering is 500-515 ℃, and the heat preservation time is 2-3 h.
Preferably, the low temperature tempering is followed by air cooling to room temperature.
Preferably, the end tempering comprises the steps of: tempering and preheating and high-temperature tempering; the temperature during tempering and preheating is 340-380 ℃, and the heat preservation time is 2-3 h; the temperature during high-temperature tempering is 580-590 ℃, and the heat preservation time is 2-3 h.
Compared with the prior art, the invention has the following beneficial effects:
the heat treatment method of the full-hardened withdrawal and straightening roller provided by the invention has the advantages that the withdrawal and straightening roller is completely hardened, the hardness of the working surface reaches HRC 61-63, the hardness is high, the wear resistance is realized, the service life is long, the surface quality of a plate can be effectively improved, the service life is more than twice of that of a common withdrawal and straightening roller, and the production cost is reduced.
Drawings
FIG. 1 is a flow chart of a fully hardened withdrawal and straightening roll for bulk quenching;
FIG. 2 is a flow chart of the overall tempering of a fully hardened pulling roll;
FIG. 3 is a flow chart of end tempering of a fully hardened pulling roll;
FIG. 4 is a hardness profile of a fully hardened withdrawal roll;
FIG. 5 is a graph of a test of a fully hardened withdrawal roll of diameter 16;
FIG. 6 is a metallographic image of the lateral surface of a fully hardened withdrawal and straightening roll;
FIG. 7 is a gold phase diagram of the surface at cross direction 1/2R of a fully hardened withdrawal roll;
FIG. 8 is a metallographic image of the surface at the lateral center of a fully hardened withdrawal straightening roll;
FIG. 9 is a metallographic image of the longitudinal surface of a fully hardened withdrawal and straightening roll;
FIG. 10 is a gold phase diagram of the surface at longitudinal 1/2R of a fully hardened withdrawal roll;
FIG. 11 is a metallographic image of the surface at the longitudinal center of a fully hardened withdrawal straightening roll;
FIG. 12 is a partial inspection of a fully hardened withdrawal roll.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1 to 12, the heat treatment method of the fully hardened withdrawal and straightening roll includes the following steps: firstly, carrying out integral quenching and integral tempering on the pulling and straightening roller to completely harden the pulling and straightening roller, and then carrying out end tempering on non-working areas at two ends of a working roller of the pulling and straightening roller to ensure that the hardness of the non-working areas at two ends of the working roller is less than that of the working area of the working roller, and the toughness of the non-working areas is greater than that of the working area.
The full hardening means that the hardness of the surface and the core of the pulling-straightening roll is consistent, the whole pulling-straightening roll is hardened, for example, the pulling-straightening roll with the diameter of 16 is used until the diameter of 5, the hardness of the pulling-straightening roll with the diameter of 5 is still unchanged, the hardness is kept at HRC 61-63, the pulling-straightening roll can be used after being repaired repeatedly, the pulling-straightening roll with the large diameter on a large pulling-straightening machine can be scrapped and modified into the pulling-straightening roll with the small diameter to be used on a small pulling-straightening machine, and the cost of the pulling-straightening roll is greatly reduced.
The pulling and straightening roller comprises a working roller and connecting shafts which are arranged at two ends of the working roller and have diameters smaller than that of the working roller. The working roll comprises a working area and a non-working area, and the non-working area is positioned at two ends of the working roll. The working area of the working roll is used for correcting the plate.
The integral quenching comprises the following steps:
preheating, high-temperature heating, quenching and low-temperature tempering, wherein the temperature during the high-temperature heating is 1015-1030 ℃, the heat preservation time is 20-25 min, the air during the quenching is cooled to 70-100 ℃, and the low-temperature tempering is carried out twice.
Wherein the low temperature tempering is performed twice.
In at least one embodiment, preheating includes performing the first constant temperature preheating, the second constant temperature preheating and the third constant temperature preheating in sequence, and the temperature is increased in sequence: the temperature of primary constant-temperature preheating is 350-450 ℃, and the heat preservation time is 2-3 h; the temperature of the secondary constant-temperature preheating is 550-650 ℃, and the heat preservation time is 1-2 h; the temperature of the third constant-temperature preheating is 750-850 ℃, and the heat preservation time is 0.5-1 h.
In at least one embodiment, the temperature difference between the primary constant-temperature preheating and the secondary constant-temperature preheating and the temperature difference between the secondary constant-temperature preheating and the tertiary constant-temperature preheating are all 180-220 ℃.
In at least one embodiment, the low temperature tempering temperature is 150-200 ℃, and the heat preservation time is 2-4 h.
In at least one embodiment, the overall tempering comprises the steps of: tempering preheating and high-temperature tempering: the temperature during tempering and preheating is 340-380 ℃, and the time is 2-3 h; the temperature during high-temperature tempering is 500-515 ℃, and the time is 2-3 h.
In at least one embodiment, the low temperature tempering is followed by air cooling to room temperature.
In not less than one embodiment, the end tempering comprises the steps of: tempering and preheating and high-temperature tempering; the temperature during tempering and preheating is 340-380 ℃, and the time is 2-3 h; the temperature during high-temperature tempering is 580-590 ℃, and the time is 2-3 h.
The heat treatment method of the full-hardened withdrawal and straightening roll is used for heat treatment of the withdrawal and straightening roll made of tool steel, wherein the tool steel comprises AISI-D2, Cr12MoV1, D2ESR and the like.
The full-hardening withdrawal and straightening roller comprises a working roller and connecting shafts, the connecting shafts are arranged at two ends of the working roller, the diameters of the connecting shafts are smaller than those of the working roller, working areas and non-working areas are arranged on the working roller, the non-working areas are located at two ends of the working roller and are connected with the connecting shafts, the hardness of the working areas of the working roller and the hardness of the connecting shafts are HRC 61-63, and the hardness of the non-working areas is HRC 50-55.
The processing technology of the full-hardened withdrawal and straightening roller comprises the following steps:
rough machining of the blank → integral quenching and integral tempering, the hardness is larger than HRC 61-63 → tempering of non-working areas at two ends of the working roll to HRC 50-55 → rough machining → fine machining → grinding → packaging → shipment.
As shown in FIG. 4, the positions 20-50 mm inward from the end surfaces of the two ends of the working roll are non-working areas, and the non-working areas at the two ends of the working roll are tempered to HRC 50-55.
The depth of the hardening layer is 100 percent, a lathe is adopted for rough machining, a grinding machine is adopted for finish machining, and the machining difficulty of the full-hardened pulling and straightening roller is higher than that of a pulling and straightening roller only subjected to surface hardening.
As shown in fig. 1 to 3, the heat treatment method of the fully hardened withdrawal and straightening roll comprises the following steps:
s1, preheating, wherein the temperature of primary constant-temperature preheating is 350-450 ℃, and the heat preservation time is 2-3 h;
s2, preheating, wherein the temperature of the secondary constant-temperature preheating is 550-650 ℃, and the heat preservation time is 1-2 h;
and S3, preheating, wherein the temperature of the three constant-temperature preheats is 750-850 ℃, and the heat preservation time is 0.5-1 h.
S4, heating at a high temperature of 1015-1030 ℃ for 20-25 min;
s5, quenching, and cooling to 70-100 ℃ in air;
s6, low-temperature tempering, wherein the temperature of the low-temperature tempering is 150-200 ℃, the heat preservation time is 2-4 hours, and the low-temperature tempering is carried out twice;
s7, cooling, and cooling the air to room temperature;
s8, tempering integrally, wherein the temperature during tempering preheating is 340-380 ℃, and the heat preservation time is 2-3 h;
s9, tempering integrally, wherein the temperature during high-temperature tempering is 500-515 ℃, and the heat preservation time is 2-3 h;
s10, cooling, and cooling the whole air to room temperature;
s11, tempering the end part, wherein the temperature during tempering preheating is 340-380 ℃, and the heat preservation time is 2-3 h;
s12, tempering the end part, wherein the temperature during high-temperature tempering is 580-590 ℃, and the heat preservation time is 2-3 h;
and S13, cooling, and cooling the air to room temperature.
Examples
This example includes 11 examples, and the withdrawal and straightening roll is phi 16 × 981. The different points of the various embodiments are the temperature and the holding time of constant temperature preheating, the temperature and the holding time of high temperature heating, the temperature and the holding time of quenching, the temperature and the holding time of low temperature tempering, the temperature and the holding time of overall tempering and the temperature and the holding time of end tempering.
The 1, 2 and 3 distributions in fig. 5 and 6 represent measurement points. As can be seen from fig. 5 and 6, the pulling-straightening roll treated by the heat treatment method of the fully hardened pulling-straightening roll has uniform surface hardness distribution and smooth surface, and can ensure that the surface of the plate after the plate is corrected is smooth, has no chromatic aberration, and has uniform color.
The full-hardened withdrawal and straightening roller is used on narrow and wide plate withdrawal and straightening machine equipment, and has the diameter
The length is L1450 mm-L1700 mm, the heat treatment hardness is HRC 61-63, the depth of a hardening layer of the pulling and straightening roller can reach 100%, the full roller hardening is realized, the wear resistance is high, the service life is longer, and the plate surface quality can be effectively controlled; the use effect is very good, and the device can be used in the industries of stainless steel, copper strips and silicon steel.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.
Claims (8)
1. The heat treatment method of the full-hardened withdrawal and straightening roller is characterized by comprising the following steps of: the method comprises the steps of firstly carrying out integral quenching and integral tempering on the pulling and straightening roller to enable the pulling and straightening roller to be completely hardened, and then carrying out end tempering on non-working areas at two ends of a working roller of the pulling and straightening roller to enable the hardness of the non-working areas at two ends of the working roller to be smaller than that of the working area of the working roller, and enabling the toughness of the non-working areas to be larger than that of the working area.
2. The method of heat treating a fully hardened pulling roll of claim 1 wherein the bulk quench comprises the steps of:
preheating, high-temperature heating, quenching and low-temperature tempering, wherein the temperature during the high-temperature heating is 1015-1030 ℃, the heat preservation time is 20-25 min, the air during the quenching is cooled to 70-100 ℃, and the low-temperature tempering is carried out twice.
3. The heat treatment method for the through-hardened withdrawal and straightening roll according to claim 2, characterized in that the preheating comprises primary constant-temperature preheating, secondary constant-temperature preheating and tertiary constant-temperature preheating which are sequentially carried out and sequentially increased in temperature:
the temperature of the primary constant-temperature preheating is 350-450 ℃, and the heat preservation time is 2-3 h;
the temperature of the secondary constant-temperature preheating is 550-650 ℃, and the heat preservation time is 1-2 h;
the temperature of the third constant-temperature preheating is 750-850 ℃, and the heat preservation time is 0.5-1 h.
4. The heat treatment method for the fully hardened withdrawal and straightening roll according to claim 3, wherein the temperature difference between the primary constant temperature preheating and the secondary constant temperature preheating and the temperature difference between the secondary constant temperature preheating and the tertiary constant temperature preheating are both 180-220 ℃.
5. The heat treatment method for the fully hardened withdrawal and straightening roller according to claim 2 or 3, wherein the low-temperature tempering temperature is 150 to 200 ℃ and the heat preservation time is 2 to 4 hours.
6. The method of heat treating a through hardened pulling roll according to claim 2 or 3 wherein the bulk tempering comprises the steps of: tempering and preheating and high-temperature tempering;
the temperature during tempering and preheating is 340-380 ℃, and the heat preservation time is 2-3 h;
the temperature during high-temperature tempering is 500-515 ℃, and the heat preservation time is 2-3 h.
7. The method of heat treating a through hardened pulling roll of claim 2 wherein the low temperature tempering is followed by air cooling to room temperature.
8. The method of heat treating a through hardened pulling roll of claim 1 wherein the end tempering comprises the steps of: tempering and preheating and high-temperature tempering;
the temperature during tempering and preheating is 340-380 ℃, and the heat preservation time is 2-3 h;
the temperature during high-temperature tempering is 580-590 ℃, and the heat preservation time is 2-3 h.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110191976.1A CN112981083A (en) | 2021-02-19 | 2021-02-19 | Heat treatment method of full-hardened withdrawal and straightening roller |
| KR1020210057774A KR102511362B1 (en) | 2021-02-19 | 2021-05-04 | Method for hardening pulling-straightening roller through thermal treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110191976.1A CN112981083A (en) | 2021-02-19 | 2021-02-19 | Heat treatment method of full-hardened withdrawal and straightening roller |
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| Publication Number | Publication Date |
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| CN112981083A true CN112981083A (en) | 2021-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110191976.1A Pending CN112981083A (en) | 2021-02-19 | 2021-02-19 | Heat treatment method of full-hardened withdrawal and straightening roller |
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| Country | Link |
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| KR (1) | KR102511362B1 (en) |
| CN (1) | CN112981083A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622081A (en) * | 2022-03-21 | 2022-06-14 | 无锡亿宝机械设备有限公司 | Double-end tempering and toughening treatment method for full-hardened working roll made of D2 material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0892657A (en) * | 1994-09-29 | 1996-04-09 | Daido Steel Co Ltd | Production of prehardened steel bar and apparatus for producing the same |
| JPH11310825A (en) * | 1998-04-28 | 1999-11-09 | Nippon Steel Corp | Manufacture of work roll for cold rolling |
| CN103589850A (en) * | 2013-10-31 | 2014-02-19 | 宜兴市鑫源辊业有限公司 | Manufacturing method for scale breaking tension leveler working roll |
| CN111020127A (en) * | 2020-01-08 | 2020-04-17 | 无锡亿宝机械设备有限公司 | Novel heat treatment process for full-hardened cold-rolled working roll |
| CN111136127A (en) * | 2020-01-06 | 2020-05-12 | 无锡亿宝机械设备有限公司 | Tension leveler tension leveling roller and heat treatment process |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100354917B1 (en) * | 2000-03-31 | 2002-09-30 | 정광수 | Production method of cold rolling roll |
| KR100573034B1 (en) * | 2004-09-21 | 2006-04-24 | 이상구 | Method of heat treating for rocker arm roller and rocker arm roller produced by the method |
| KR101363607B1 (en) | 2013-07-30 | 2014-02-17 | 주식회사 성진이앤아이 | Method for manufacturing a cold-rolling roller and cold-rolling roller manufactured by the same |
-
2021
- 2021-02-19 CN CN202110191976.1A patent/CN112981083A/en active Pending
- 2021-05-04 KR KR1020210057774A patent/KR102511362B1/en active IP Right Grant
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0892657A (en) * | 1994-09-29 | 1996-04-09 | Daido Steel Co Ltd | Production of prehardened steel bar and apparatus for producing the same |
| JPH11310825A (en) * | 1998-04-28 | 1999-11-09 | Nippon Steel Corp | Manufacture of work roll for cold rolling |
| CN103589850A (en) * | 2013-10-31 | 2014-02-19 | 宜兴市鑫源辊业有限公司 | Manufacturing method for scale breaking tension leveler working roll |
| CN111136127A (en) * | 2020-01-06 | 2020-05-12 | 无锡亿宝机械设备有限公司 | Tension leveler tension leveling roller and heat treatment process |
| CN111020127A (en) * | 2020-01-08 | 2020-04-17 | 无锡亿宝机械设备有限公司 | Novel heat treatment process for full-hardened cold-rolled working roll |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622081A (en) * | 2022-03-21 | 2022-06-14 | 无锡亿宝机械设备有限公司 | Double-end tempering and toughening treatment method for full-hardened working roll made of D2 material |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20220118877A (en) | 2022-08-26 |
| KR102511362B1 (en) | 2023-03-16 |
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