CN105483354B - The heat treatment method of large high-speed steel cold roll - Google Patents
The heat treatment method of large high-speed steel cold roll Download PDFInfo
- Publication number
- CN105483354B CN105483354B CN201510979340.8A CN201510979340A CN105483354B CN 105483354 B CN105483354 B CN 105483354B CN 201510979340 A CN201510979340 A CN 201510979340A CN 105483354 B CN105483354 B CN 105483354B
- Authority
- CN
- China
- Prior art keywords
- roll
- heat treatment
- cold
- continuous
- speed steel
- Prior art date
- 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.)
- Active
Links
Classifications
-
- 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
- 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
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- 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 discloses a kind of heat treatment method of large high-speed steel cold roll, belong to technical field of heat treatment.Including preliminary treatment, the pre-heat treatment and final heat treatment, the pre-heat treatment includes overall low-temperature prewarming, with the preheating of continuous sensing heating, during continuous sensing heating preheating, the temperature requirement that roll goes out induction coil is 600~750 DEG C, roll is continued to move up, goes out after induction coil 15~35min of air cooling minutes, then carries out final heat treatment.The present invention is different from conventional continuous induction hardening mode, and adding the body of roll on the basis of conventional overall preheating continuously senses the pre-heat treatment step, can greatly improve large high-speed steel roll and be heat-treated to power.Roll adds cold treatment after being tempered in first time simultaneously, makes the hardness of body of roll acquisition more than 90HSD after high-speed steel cold roll final heat treatment, is fully able to meet the technical requirements of cold-rolled steel sheet.
Description
Technical field
The present invention relates to a kind of heat treatment method of large-sized forging high-speed steel cold roll, belong to heat treatment technics neck
Domain.
Background technology
To realize rolling high precision cold-strip steel and improving milling train production efficiency, mill milling speed is increasingly faster, rolling
Thickness of strip more and more thinner, stocking resistance of deformation are increasing.The main flow material of current cold roll is 3%Cr and 5%Cr,
The body of roll can obtain more than 90HSD high rigidity after heat treatment of workpieces, disclosure satisfy that the surface quality requirements of cold-rolled steel sheet, but
Due to material self-characteristic, this high rigidity can only ensure that usual temperature is below 160 DEG C with low temperature.
But in actual production, the rolling accidents such as some strip skidding, sideslip, broken belt, steel bondings are often had, this
A little accidents make working roll body of roll local surfaces be rapidly heated, the quick cooling again under emulsion flushing afterwards, make the working roll body of roll
Local surfaces are subjected to a thermal shock.Different according to the light and heavy degree of rolling accident, working roll is by table during thermal shock accident
Temperature rise in face is also different, but often all more than 400 DEG C, thus conventional material lonneal roll easily because being rushed by heat
Hit accident trigger body surface crackle and localized delamination etc. failure, can not meet present-day mill rolling high-strength, high accuracy,
The requirement of ultra-thin steel sheet；Carbide quantity is few in common material roll simultaneously, and hardness is low, and roll wears no resistance, and in tandem mill
In the operation of rolling gloss level of roll decay it is too fast, toward contact arrive the roll change cycle will due to roughness deficiency and change roll,
So as to reduce rolling efficiency.
High-speed steel material has good quenching degree, red hardness, and high-speed steel roll is assigned with high temper resistance, heat resistanceheat resistant from face
The features such as impact, high rigidity, high abrasion, the holding of high roughness, solve this problem well, are modernization cold continuous rollings
The renewal product of machine, singlestandmill working roll and planisher working roll.Heat treatment is large-sized forging high-speed steel Cold-roller
Make a problem in roller production, because hardening heat is high, quenching process is interrupted, heat treatment cracking had been once that influence large-sized forging is high
The major hidden danger of fast steel roll safety in production, next to that being difficult to obtain high hardness of roll body at high temperature tempering, the two factors
Govern the production and popularization and application of large high-speed steel cold roll.
Therefore the selection of Technology for Heating Processing is the key problem in technology of large-sized forging high-speed steel roll production, both needs to ensure safety
Production, prevents heat treatment from interrupting, heat treatment cracking is damaged to equipment and personnel, ensures that roll is obtained after high tempering again
High working lining hardness and performance meets design and production scene is required, be forging high-speed steel roll on cold strip rolling mill
Popularization and application lay a solid foundation.
The content of the invention
Present invention solves the technical problem that being to provide a kind of heat treatment method of large-sized forging high-speed steel cold roll, energy
Prevent heat-treatment quenching from interrupting, the heat treatment problem of Cracking of large high-speed steel cold roll is effectively solved, while high tempering back roller
Body hardness can reach more than 90HSD and radial stiffness drop very little, be entirely capable of meeting technical requirements of the cold-rolled steel sheet to roll.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of heat treatment method of large-sized forging high-speed steel cold roll, including preliminary treatment and final heat treatment,
The pre-heat treatment is provided between preliminary treatment and final heat treatment, the pre-heat treatment includes following two step：
A, overall low-temperature prewarming：Roll after preliminary treatment is subjected to overall low-temperature prewarming, preheating insulation temperature is 220~
450 DEG C, 10~20h of soaking time；
B, the preheating of continuous sensing heating：Roll after processing of step A is lifted by continuous induction hardening requirement, then
Roll is mobile from bottom to top to carry out continuous sensing heating preheating, and the temperature requirement that roll goes out last induction coil is 600~750
℃；Roll is continued to move up, gone out after induction coil 15~35min of air cooling minutes.
Technical solution of the present invention further improvement is that：Final heat treatment comprises the following steps：
C, continuous induction hardening processing：Good position is adjusted by quenching technical requirement to the roll after the pre-heat treatment, then will
The continuous induction hardening of roll movement progress from top to bottom, 1080~1120 DEG C of hardening heat, roll is moved out after induction coil
Cooling is quenched using continuous water spray mode, after Quench heating terminates, continues to carry out 20~40min of water-spraying control to roll upper end；
D, temper：400 DEG C/30h~540 DEG C/30h temper, tempering are carried out to the roll after step C processing
Soaking time is 30~100h；
E, cold treatment：- 200 DEG C/6h~-150 DEG C/6h cold treatment is carried out to the roll after step D processing；
F, repeat step D more than twice, are finally machined to finished product by drawing.
Technical solution of the present invention further improvement is that：Entirety is carried out to roll using bench vehicle type electrical resistance furnace in step A
Low-temperature prewarming.
By adopting the above-described technical solution, the technological progress that the present invention is obtained is：
This method is different from conventional continuous induction hardening mode, is added between preliminary treatment and final heat treatment pre-
Heat treatment process, it is to avoid the defect of conventional the pre-heat treatment+continuous induction hardening；The pre-heat treatment includes two steps：First to rolling
Roller integrally carries out 220~450 DEG C of low-temperature prewarming, then carries out continuous sensing heating preheating, then carries out final continuous sensing and adds
Thermal quenching, tempering and cold treatment, the processing method can greatly improve large high-speed steel roll and be heat-treated to power, be prevented effectively from
The destructive failures such as heat treatment cracking, and the body of roll after the heat treatment of high-speed steel cold roll is obtained the high hard of more than 90HSD
Degree, and uniformity of hardness is high, radial stiffness drop is small, when being applied on cold belt tandem mill, and roughness retaining capability is protruded very much,
Change that the grinding roller cycle can reach common material cold roll 3-4 times, stock removal is without increase, and the surface quality of institute's rolling sheets is complete
It disclosure satisfy that technical requirements entirely.
Increase continuous sensing heating preheating, body of roll temperature before quenching can be improved, to equipment during reduction quenching high-temperature heating
Power demand, effectively prevents quenching from interrupting.
In continuous induction hardening processing, to quenching intensity of cooling and accurate, the rational control of quenching follow-up cool time,
Efficiently solve the problems, such as high-speed steel roll hardening crack；
Cold treatment in step E is arranged in after a high tempering, be can guarantee that and is obtained security control in residual stress
Under the premise of carry out cold treatment, it is to avoid roll stress be superimposed upon in cold-treating process be broken.Make retained austenite further simultaneously
It is changed into martensite, makes the hardness of body of roll acquisition more than 90HSD after high-speed steel cold roll final heat treatment, reach raising roller
The purpose of body hardness.
Embodiment
The present invention is described in further details with reference to embodiment：
Embodiment 1
A kind of heat treatment method of large high-speed steel cold roll, the requirement of the working roll is as follows：
Roller diameter：
Hardness of roll body requirement：90~95HSD；
Working lining thickness requirement：≥33mm；
Roll material：High-speed steel is forged, steel ingot is produced using electric furnace+ladle refining+electroslag remelting mode, steel ingot presses technique
It is required that being heated, forging roll forging stock is made.
The heat treatment method includes preliminary treatment, the pre-heat treatment and final heat treatment, and step is as follows：
First, preliminary treatment：Preliminary treatment is carried out on request to high speed steel cold roller forging stock, be machined by drawing to
The size needed；
2nd, the pre-heat treatment：
A, overall low-temperature prewarming：Roll after preliminary treatment is subjected to overall low-temperature prewarming, preheating with bench vehicle type electrical resistance furnace
Holding temperature is 220 DEG C, soaking time 14h；
B, the preheating of continuous sensing heating：Roll after processing of step A is lifted by continuous induction hardening requirement, then
Roll is mobile from bottom to top to carry out continuous sensing heating preheating, and the temperature that roll goes out induction coil is 700 DEG C；Roll is continued up
It is mobile, go out after induction coil air cooling 15min minutes；
3rd, final heat treatment：
C, continuous induction hardening processing：Good position is adjusted by quenching technical requirement to the roll after the pre-heat treatment, then will
Roll is mobile from top to bottom to carry out continuous induction hardening, and 1100 DEG C of hardening heat, roll is moved out after induction coil using company
Continuous spray mode quenching cooling；After Quench heating terminates, continue to carry out water-spraying control 40min to roll upper end；
D, temper：480 DEG C/30h temper is carried out to the roll after step C processing, tempering insulation time is
30h；
E, cold treatment：- 180 DEG C/6h cold treatment is carried out to the roll after step D processing；
G, temperature is adjusted to 520 DEG C, and repeats twice, finished product to be finally machined to by drawing.
Embodiment 2
The present embodiment is distinguished as with embodiment 1：Preheating insulation temperature in step A is 350 DEG C, soaking time 20h.
Embodiment 3
The present embodiment is distinguished as with embodiment 1：The temperature that roll goes out induction coil in step B is 750 DEG C；Roll is continued
Move up, go out after induction coil air cooling 20min minutes.
Embodiment 4
The present embodiment is distinguished as with embodiment 1：Temperature is 530 in 1120 DEG C of hardening heat in step C, step D
DEG C, -200 DEG C/6h cold treatments are carried out after temper, the temper that three temperature are 530 DEG C is carried out after cold treatment again.
Embodiment 5
The present embodiment is distinguished as with embodiment 1：Temper temperature is 450 DEG C in step D.
Embodiment 6
The present embodiment is comparative example, compared with example 1, and the pre-heat treatment before final heat treatment uses common process,
Overall low-temperature prewarming is only carried out, 220 DEG C of preheating temperature does not perform step B continuous sensing heating preheating, remaining technique is with real
Apply example 1.
The test ring that body of roll radial direction 50mm is deep is taken after the product final heat treatment of 1~embodiment of embodiment 6, tangentially sample into
Row mechanical performance is detected, radially carries out hardness determination, and testing result is shown in Table 1.
The embodiment product mechanical performance testing result of table 1
When can be seen that by the data of table 1 using common process production, because temperature low equipment in body of roll bottom is thrown in quenching process
Enter power excessive, cause circuit breaker and quenching is failed.The large high-speed steel cold roll prepared using this method, quenching
The ratio of interruption and body of roll cracking is 0, finished product body of roll case hardness is in more than 90HSD, case hardness uniformity and radial direction
Hardness drop is all within 2HSD in 35mm, and it is 100% to be heat-treated to power.
Claims (2)
1. a kind of heat treatment method of large high-speed steel cold roll, including preliminary treatment and final heat treatment, its feature exist
In：The pre-heat treatment is provided between preliminary treatment and final heat treatment, the pre-heat treatment includes following two step：
A, overall low-temperature prewarming：Roll after preliminary treatment is subjected to overall low-temperature prewarming, preheating insulation temperature is 220~450
DEG C, 10~20h of soaking time；
B, the preheating of continuous sensing heating：Roll after processing of step A is lifted by continuous induction hardening requirement, then roll
Mobile from bottom to top to carry out continuous sensing heating preheating, the temperature requirement that roll goes out induction coil is 600~750 DEG C；By roll after
It is continuous to move up, go out after induction coil 15~35min of air cooling minutes；
Final heat treatment comprises the following steps：
C, continuous induction hardening processing：Good position is adjusted by quenching technical requirement to the roll after the pre-heat treatment, then by roll
The continuous induction hardening of movement progress from top to bottom, 1080~1120 DEG C of hardening heat, roll is moved out and used after induction coil
Continuous water spray mode quenches cooling；After Quench heating terminates, continue to carry out 20~40min of water-spraying control to roll upper end；
D, temper：480 DEG C/30h~540 DEG C/30h temper is carried out to the roll after step C processing；
E, cold treatment：- 200 DEG C/6h~-150 DEG C/6h cold treatment is carried out to the roll after step D processing；
F, repeat step D more than twice, are finally machined to finished product by drawing.
2. the heat treatment method of large high-speed steel cold roll according to claim 1, it is characterised in that：In step A
Overall low-temperature prewarming is carried out to roll using bench vehicle type electrical resistance furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979340.8A CN105483354B (en) | 2015-12-23 | 2015-12-23 | The heat treatment method of large high-speed steel cold roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979340.8A CN105483354B (en) | 2015-12-23 | 2015-12-23 | The heat treatment method of large high-speed steel cold roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105483354A CN105483354A (en) | 2016-04-13 |
| CN105483354B true CN105483354B (en) | 2017-09-29 |
Family
ID=55670625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510979340.8A Active CN105483354B (en) | 2015-12-23 | 2015-12-23 | The heat treatment method of large high-speed steel cold roll |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105483354B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107177721A (en) * | 2017-06-29 | 2017-09-19 | 太仓市钧胜轧辊有限公司 | A kind of quenching technology for surfaces for roll |
| CN109468451B (en) * | 2018-12-12 | 2020-09-15 | 中钢集团邢台机械轧辊有限公司 | Heat treatment method of 55NiCrMoV7 roller way roller |
| CN109457102A (en) * | 2018-12-12 | 2019-03-12 | 中钢集团邢台机械轧辊有限公司 | A kind of heat treatment method of M2 high-speed steel working roll |
| CN111139351B (en) * | 2019-12-26 | 2022-06-17 | 中钢集团邢台机械轧辊有限公司 | Process method for differential temperature heat treatment of forged steel BD roller |
| CN112391582B (en) * | 2020-11-18 | 2022-01-18 | 宝钢轧辊科技有限责任公司 | Ultra-deep quench hardening layer forged steel cold rolling working roll and manufacturing method thereof |
| CN112522501B (en) * | 2020-12-02 | 2022-08-02 | 河南中原特钢装备制造有限公司 | Annealing process of surface quenching interrupted roller made of Cr3 or Cr5 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5825733B2 (en) * | 1979-11-27 | 1983-05-30 | 新日本製鐵株式会社 | Method for manufacturing high-strength cold-rolled steel sheet with good paintability, weldability, and workability |
| JP2002336904A (en) * | 2001-05-14 | 2002-11-26 | Nippon Steel Corp | Method for manufacturing composite work roll for cold rolling and work roll |
| CN100376695C (en) * | 2005-03-29 | 2008-03-26 | 宝钢集团常州轧辊制造公司 | Method for making quench hardening layer of cold roll barrel |
| CN103397267B (en) * | 2013-07-12 | 2016-01-20 | 中钢集团邢台机械轧辊有限公司 | Rolling lithium battery protection board cold roll and manufacture method thereof |
| CN104032103A (en) * | 2014-05-12 | 2014-09-10 | 宜兴市永昌轧辊有限公司 | Heat treatment method for superdeep-hardening-layer cold roll and quenching equipment employed during heat treatment |
| CN104032117B (en) * | 2014-05-12 | 2016-09-14 | 宜兴市永昌轧辊有限公司 | A kind of heat treatment method of ultrahigh hardness non-ferrous metal cold roll |
| CN104120341A (en) * | 2014-08-12 | 2014-10-29 | 江苏润孚机械轧辊制造有限公司 | Cr5 steel forging work roll for rolling extremely thin materials and preparation method thereof |
-
2015
- 2015-12-23 CN CN201510979340.8A patent/CN105483354B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105483354A (en) | 2016-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105483354B (en) | The heat treatment method of large high-speed steel cold roll | |
| CN108381027B (en) | Vacuum welding device for preparing high-carbon-equivalent super-thick steel plate and preparation method thereof | |
| CN105239012B (en) | Semi high speed steel cold-rolling working roll and manufacturing method with highly resistance accident performance | |
| CN104593691B (en) | Roller sleeve for large forged alloy steel carrying roller and manufacturing method thereof | |
| CN107282839A (en) | A kind of forging technology of forging | |
| CN104087742A (en) | Differential temperature heat treatment method for centrifugal compound high-chromium steel roller | |
| CN102357778A (en) | Manufacturing method of pulling straightening roller | |
| CN103074482B (en) | Regeneration method of scrapped Cr5 forged-steel working roller | |
| CN103409688A (en) | Large forged high-speed steel cold roll and manufacturing method thereof | |
| CN114410893B (en) | Ultra-fine grain structure heat treatment process for annealed hot work die steel | |
| CN104120238A (en) | Wheel hardening and tempering heat treatment technology | |
| CN103108975A (en) | A forged roll meeting the requirements of the cold rolling industry and a method for production of such a roll | |
| CN104120341A (en) | Cr5 steel forging work roll for rolling extremely thin materials and preparation method thereof | |
| CN102528382A (en) | Manufacture method of cold-rolled roller | |
| CN104018082A (en) | Medium-carbon low-alloy wheel steel for metro and manufacturing method of wheel steel | |
| CN103602798A (en) | Method for heat treatment on high-hardness semi-steel roller | |
| CN108339913A (en) | A kind of forging method of metallurgy mine tram wheel | |
| CN1330787C (en) | Shield engine disk type hobbing cutter ring and its production method | |
| CN103317319A (en) | Production processing method for edge-digging scissors made of Cr12Mo1V1 | |
| JP5443843B2 (en) | Method for producing forged steel roll for cold rolling | |
| CN105385814A (en) | Thermal treatment method for tube section forging piece of hydrogenation reactor | |
| CN102618710A (en) | Method for reconstructing scrapped cold roll into qualified cold roll | |
| CN108130492A (en) | Overhang roll and its manufacturing method | |
| CN104120342A (en) | Roll and preparation method thereof | |
| CN109022738B (en) | Preparation method of low-temperature impact resistant CrMo alloy steel forged circle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |