CN107150205A - Method for scrapping large forged back -up roll circular regeneration - Google Patents
Method for scrapping large forged back -up roll circular regeneration Download PDFInfo
- Publication number
- CN107150205A CN107150205A CN201710193228.0A CN201710193228A CN107150205A CN 107150205 A CN107150205 A CN 107150205A CN 201710193228 A CN201710193228 A CN 201710193228A CN 107150205 A CN107150205 A CN 107150205A
- Authority
- CN
- China
- Prior art keywords
- roll
- repair
- rolling support
- forged steel
- steel cold
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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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
-
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
High tempering processing, roughing, heat treatment, reparation and finishing are carried out successively the invention discloses a kind of method for being used to scrap large forged back -up roll circular regeneration, including to scrapping forged steel cold-rolling support roll.Wherein, repairing includes Bead weld repair and insetting sleeve repair；The Bead weld repair be used for bearing guard roll neck at and other localized loss at or size irregularity；The insetting sleeve repair be used for bearing guard roll neck at outside other regular shapes roll neck shelves.The method of the present invention carries out repair and reconstruction to the forged steel cold-rolling support roll scrapped and prepares new forged steel cold-rolling support roll, in terms of forged steel cold-rolling support roll is scrapped, greatly avoid the waste of material, and in terms of forged steel cold-rolling support roll preparation technology, the high tempering for only increasing 620 DEG C is handled and renovation technique, manufacturing process greatly is shortened, manufacturing cost is saved.
Description
Technical field
The present invention relates to a kind of method for being used to scrap large forged back -up roll circular regeneration.
Background technology
Forged steel cold-rolling support roll is mainly used in 4 rollers or 6 cold mill groups, because its specification is big, floor-to-floor time length, simultaneously
And bearing larger roll-force, it is therefore desirable to it has higher intensity, wearability and fatigue resistance.
The forged steel cold-rolling support roll in country's cold mill complex generally uses forged steel material with differential quenching or entirety at present
The mode of impewdance matching is produced, and its general production process includes：Electric furnace smelting → external refining → vacuum outgas → vacuum casting
Ingot → High temperature diffusion → forging → normalizing → nodularization expansion hydrogen annealing → roughing → conditioning treatment → semifinishing → final
Heat treatment → finishing → finished product.The whole production cycle generally requires 5, more than 6 months.
Although the manufacturing process of forged steel cold-rolling support roll is ripe, on the whole from the point of view of still suffer from some shortcomings：（1）Roller
Base is manufactured and Final Heat Treatment Process flow complexity, cycle length, energy consumption are big.（2）In manufacturing process, once dimensioned goes out
Mistake, generally using processing is scrapped, causes the waste of manufacturing procedure, loses larger.
The substantial amounts of normal abandonment and the forged steel cold-rolling support roll of abnormal scrap accumulated for steel mill, typically all with useless
The mode of steel is sold, so as to cause substantial amounts of loss.
The content of the invention
It is an object of the invention to solve the above problems to be used to scrap large forged back -up roll circular regeneration there is provided a kind of
Method.
Realizing the technical scheme of the object of the invention is：A kind of method for being used to scrap large forged back -up roll circular regeneration,
Including carrying out high tempering processing, roughing, heat treatment, reparation and finishing successively to scrapping forged steel cold-rolling support roll.
Described heat treatment includes modifier treatment（Namely conditioning treatment）And Quenching Treatment（Namely final heat treatment）.
Described reparation includes Bead weld repair and insetting sleeve repair；Wherein, the Bead weld repair is sentenced for bearing guard roll neck
And at other localized loss or size irregularity；The insetting sleeve repair be used for bearing guard roll neck at outside other regular shapes
The roll neck shelves of shape.
The overlay cladding that the Bead weld repair is used includes prime coat and hardstanding.
The prime coat uses low-carbon alloy, to ensure that overlay cladding is combined with parent.
The chemical composition and percentage by weight of the prime coat are as follows：C：0.10~0.12%；Si：0.4~0.6%；Mn：
1.5~1.8%；Cr：1.2~1.5%；Mo：0.6~0.8%；Ni：0.8~1.0%；V≤0.05%；P≤0.025%；S≤
0.025%；Remaining is iron and inevitable impurity.
Hardness and wearability requirement that the hardstanding uses the higher material of stellite content to meet surface etc..
The chemical composition and percentage by weight of the overlay cladding are as follows：C：0.30~0.40%；Si：0.2~0.3%；Mn：
1.5~2.0%；Cr：2.6~3.0%；Mo：0.8~1.0%；Ni：1.2~1.5%；V≤0.05%；P≤0.025%；S≤
0.025%；Remaining is iron and inevitable impurity.
The good effect that the present invention has：（1）The method of the present invention is repaired again to the forged steel cold-rolling support roll scrapped
Make and prepare new forged steel cold-rolling support roll, in terms of forged steel cold-rolling support roll is scrapped, greatly avoid the waste of material,
And in terms of forged steel cold-rolling support roll preparation technology, 620 DEG C of high tempering processing and renovation technique is only increased,
Manufacturing process greatly is shortened, manufacturing cost is saved.（2）The method of the present invention reparation is arranged on Quenching Treatment after,
It is remaining so as to meet this avoid the deformation that high-temperature process after reparation is caused to forged steel cold-rolling support roll before finishing
Amount processing and the influence for eliminating heat treatment.（3）The reparation of the present invention is divided at bearing guard roll neck and at other localized loss
Or size irregularity carries out Bead weld repair and the roll neck shelves to other regular shapes outside at bearing guard roll neck are carried out
Insetting sleeve repair, so as to meet the performance requirement at each position of forged steel cold-rolling support roll.（4）The Bead weld repair of the present invention is adopted
Prime coat and hardstanding ensure that the forged steel cold-rolling support roll after repairing has higher case hardness and preferably resistance to
Mill property, can fully meet application requirement.（5）The repair and reconstruction method of the present invention had both met the chi of new forged steel cold-rolling support roll
It is very little to require, heat treatment technics requirement of product etc. can be reached again, so as to retrieve the forged steel cold-rolling support roll scrapped
Utilize, greatly avoid loss, saved production and manufacturing cost.
Embodiment
（Embodiment 1）
The method for being used to scrap large forged back -up roll circular regeneration of the present embodiment has steps of：
1. the high tempering that 620 DEG C are first carried out to scrapping forged steel cold-rolling support roll is handled.
Body of roll roll neck can so be softened, be easy to follow-up roughing.
2. roughing is carried out to the backing roll after high tempering processing.
It should be noted that：, it is necessary to will first scrap forged steel cold-rolling support roll and the cold rolling branch of new forged steel before roughing
Runner carries out size comparison, the barrel length and diameter of scrapping forged steel cold-rolling support roll is met new forged steel cold-rolling support roll
Roller stock roughing size, in the case where being divided equally with barrel length surplus, overall length ensures allowance, and remaining can be lacked.
3. modifier treatment and Quenching Treatment are carried out to the backing roll after roughing.
Wherein, modifier treatment temperature is 930 DEG C, and using 590 DEG C of temper.
Quenching Treatment temperature is 1030 DEG C, and using 500 DEG C of temper.
4. Bead weld repair and insetting sleeve repair are carried out to the backing roll after modifier treatment and Quenching Treatment.
Wherein Bead weld repair be used for bearing guard roll neck at and other localized loss at or size irregularity；Insetting sleeve repair
Roll neck shelves for other regular shapes outside at bearing guard roll neck.
The overlay cladding that Bead weld repair is used includes prime coat and hardstanding.
Wherein, prime coat uses low-carbon alloy, to ensure that overlay cladding is combined with parent.
The chemical composition and percentage by weight of prime coat are as follows：C：0.10~0.12%；Si：0.4~0.6%；Mn：1.5~
1.8%；Cr：1.2~1.5%；Mo：0.6~0.8%；Ni：0.8~1.0%；V≤0.05%；P≤0.025%；S≤0.025%；Remaining
For iron and inevitable impurity.
Hardness and wearability requirement that hardstanding uses the higher material of stellite content to meet surface etc..
The chemical composition and percentage by weight of overlay cladding are as follows：C：0.30~0.40%；Si：0.2~0.3%；Mn：1.5~
2.0%；Cr：2.6~3.0%；Mo：0.8~1.0%；Ni：1.2~1.5%；V≤0.05%；P≤0.025%；S≤0.025%；Remaining
For iron and inevitable impurity.
After Bead weld repair, in addition to hardness and size etc. are detected, it is necessary to carry out ultrasound and involve PT detections, so that it is guaranteed that not depositing
Crackle, stomata class defect are being answered, while the internal soundness in order to ensure built-up welding, it is determined that can not have the defect more than the equivalents of φ 2.
Insetting sleeve repair is mainly new bushing of the elastic conjunction on the basis of former roll neck, and bushing material is tried one's best cold with forged steel
Roll that backing roll roll body material is identical, and be heat-treated accordingly according to the performance requirement of forged steel cold-rolling support roll, while to protect
The cooperation area of elastic conjunction is demonstrate,proved, roll neck shelves and bushing endoporus need to carry out grinding processing, and roughness control is ≤0.8, together
When in view of forged steel cold-rolling support roll use environment abominable, in addition to elastic conjunction, circumferentially every 120 ° need to using positioning
The mode that pin is fixed again, so as to ensure the stability of bushing shelves completely.
5. the backing roll after reparation is finished, produces new forged steel cold-rolling support roll.
Claims (3)
1. a kind of method for being used to scrap large forged back -up roll circular regeneration, it is characterised in that：Including cold rolling to scrapping forged steel
Backing roll carries out high tempering processing, roughing, heat treatment, reparation and finishing successively.
2. the method according to claim 1 for being used to scrap large forged back -up roll circular regeneration, it is characterised in that：It is described
Reparation includes Bead weld repair and insetting sleeve repair；The Bead weld repair be used for bearing guard roll neck at and other localized loss at or chi
Very little irregularity；The insetting sleeve repair be used for bearing guard roll neck at outside other regular shapes roll neck shelves.
3. the method according to claim 1 for being used to scrap large forged back -up roll circular regeneration, it is characterised in that：It is described
The overlay cladding that Bead weld repair is used includes prime coat and hardstanding；The chemical composition and percentage by weight of the prime coat are as follows：
C：0.10~0.12%；Si：0.4~0.6%；Mn：1.5~1.8%；Cr：1.2~1.5%；Mo：0.6~0.8%；Ni：0.8~
1.0%；Remaining is iron and inevitable impurity；The chemical composition and percentage by weight of the overlay cladding are as follows：C：0.30~
0.40%；Si：0.2~0.3%；Mn：1.5~2.0%；Cr：2.6~3.0%；Mo：0.8~1.0%；Ni：1.2~1.5%；Remaining is
Iron and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710193228.0A CN107150205A (en) | 2017-03-28 | 2017-03-28 | Method for scrapping large forged back -up roll circular regeneration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710193228.0A CN107150205A (en) | 2017-03-28 | 2017-03-28 | Method for scrapping large forged back -up roll circular regeneration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107150205A true CN107150205A (en) | 2017-09-12 |
Family
ID=59792524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710193228.0A Pending CN107150205A (en) | 2017-03-28 | 2017-03-28 | Method for scrapping large forged back -up roll circular regeneration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107150205A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109454115A (en) * | 2018-11-15 | 2019-03-12 | 宝钢轧辊科技有限责任公司 | Scrap backing roll self-contained bearing inner ring reuse method |
| CN111250928A (en) * | 2018-12-03 | 2020-06-09 | 本钢板材股份有限公司 | Method for remanufacturing support roller |
| CN113441902A (en) * | 2021-07-19 | 2021-09-28 | 成都三强轧辊股份有限公司 | Repairing method of roller |
| CN114425567A (en) * | 2021-12-09 | 2022-05-03 | 重庆钢铁股份有限公司 | Rapid repairing method for looseness of water retaining ring of roller |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109454115A (en) * | 2018-11-15 | 2019-03-12 | 宝钢轧辊科技有限责任公司 | Scrap backing roll self-contained bearing inner ring reuse method |
| CN111250928A (en) * | 2018-12-03 | 2020-06-09 | 本钢板材股份有限公司 | Method for remanufacturing support roller |
| CN111250928B (en) * | 2018-12-03 | 2021-11-09 | 本钢板材股份有限公司 | Method for remanufacturing support roller |
| CN113441902A (en) * | 2021-07-19 | 2021-09-28 | 成都三强轧辊股份有限公司 | Repairing method of roller |
| CN114425567A (en) * | 2021-12-09 | 2022-05-03 | 重庆钢铁股份有限公司 | Rapid repairing method for looseness of water retaining ring of roller |
| CN114425567B (en) * | 2021-12-09 | 2024-01-30 | 重庆钢铁股份有限公司 | Quick repairing method for loosening of roller water retaining ring |
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Application publication date: 20170912 |
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