CN108060296A - A kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop - Google Patents
A kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop Download PDFInfo
- Publication number
- CN108060296A CN108060296A CN201711346445.5A CN201711346445A CN108060296A CN 108060296 A CN108060296 A CN 108060296A CN 201711346445 A CN201711346445 A CN 201711346445A CN 108060296 A CN108060296 A CN 108060296A
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- China
- Prior art keywords
- roll
- heat treatment
- ledge
- protective case
- hardness requirement
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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
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of big concave roll heat treatment methods of body of roll roll neck hardness requirement drop; belong to metal heat treatmet field; modifier treatment is carried out according to the hardness requirement of roll neck first, differential temperature processing then is carried out to the body of roll, differential temperature before processing is carried out to the body of roll in ledge outer cladding protective case.The present invention ensures product performance index, and improves product quality stability.
Description
Technical field
The present invention relates to metal heat treatmet field, especially a kind of concave roll heat treatment method.
Background technology
Shaped roll is generally open cell type delivery, and blank uses steel ingot forging, to improve pass position hardness and resistance to
The requirement of mill property, generally roughing pass before heat treatment, pass is deep mixed, shape is changeable, and the roll barrel, roll neck are hard
Degree requires drop larger, by normative heat treatment mode it is difficult to ensure that the body of roll, roll neck hardness meet technology requirement simultaneously.
Currently, to the body of roll, the larger concave roll heat treatment production of roll neck hardness requirement drop, two methods can be used.One
It is whole heating, after roll neck position is wrapped up with fiber before shove charge, integrally enters stove heat and carry out quenched, roll neck when cooling down of coming out of the stove
Position due to package fiber and cooling velocity with respect to the body of roll it is slower, so as to control the body of roll, roll neck hardness formed drop.Second is that differential temperature
Production, heating whole first carry out quenched acquisition roll neck hardness, then body of roll differential heating, cooling control hardness of roll body.But
With upper type, there are problems：1st, roll neck hardness is not accurate and uneven, whole heating cooling tempering, roll neck position package fiber
To reduce cooling rate, but each position cooling rate of roll neck cannot be accurately controlled, the trunnion hardness after heat close to the body of roll is higher, other positions
It is relatively low, to reduce security risk during use, roll neck hardness upper section is reduced using localized annealing, cost is caused to increase
Add.2nd, slot bottom working lining is relatively difficult to guarantee, and during differential heating, ledge temperature is higher and soaking time is longer, refractory bricks compared with
Low and soaking time is shorter, and ledge temperature is excessively high when slot bottom soaking time is longer, and differential temperature is larger, and ledge easily generates burning and shows
As or seminess.Slot bottom soaking time can cause its working lining relatively thin when shorter, influence user's use.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of big concave roll heat of body of roll roll neck hardness requirement drop
Processing method ensures product performance index, and improves product quality stability.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop carries out first according to the hardness requirement of roll neck
Then modifier treatment carries out differential temperature processing to the body of roll, differential temperature before processing is carried out to the body of roll in ledge outer cladding protective case.
Technical solution of the present invention further improvement lies in that：The protective case be circular ring structure, the width of the protective case
It is of same size with ledge.
Technical solution of the present invention further improvement lies in that：The pin of protective case thickness is provided through on the protective case
Hole.
Technical solution of the present invention further improvement lies in that：The pin hole more than one, and it is distributed on protective case circumference
On.
Technical solution of the present invention further improvement lies in that：Asbestos are provided between the protective case and ledge, asbestos
Thickness q=（k-100）/ 20*2, the q represent the thickness of asbestos, and k represents the diameter drop of ledge and slot bottom, unit mm.
Technical solution of the present invention further improvement lies in that：Ledge and slot bottom boundary position are carried out after the completion of modifier treatment
Chamfered, chamfer dimesion R30~50mm.
Technical solution of the present invention further improvement lies in that：Differential temperature before processing is carried out to the body of roll at body of roll slot bottom, ledge
Weldering detection relevant temperature armouring is even, and heating time and furnace temperature are adjusted according to the thermometric situation of armouring idol in differential temperature processing procedure.
Technical solution of the present invention further improvement lies in that：Protective case material ZG45.
By adopting the above-described technical solution, the technological progress that the present invention obtains is：
The present invention reduces ledge, slot bottom differential temperature, ensure that ledge, slot bottom holding temperature by setting protective case on ledge
And soaking time, avoid ledge temperature excessively high caused burning, even coarse grains, chipping phenomenon, it is ensured that slot bottom working lining
Thickness improves the quality stability of product.
The setting of pin avoids protective case along the rotation of ledge circumferential direction and comes off, around the multiple pins of protective case circumference uniform distribution
Nail, it is ensured that stress equalization improves job stability.
Asbestos between protective case and ledge are set, further enhance the coating function to ledge so that ledge, the temperature of slot bottom
It spends closer, while also avoids destruction of the pin to ledge outer circle.
The body of roll carries out differential temperature before processing and detection relevant temperature armouring idol is welded at body of roll slot bottom, ledge, convenient for according to thermometric
Situation adjusts heating time and furnace temperature in time, improves the differential temperature treatment effect of the body of roll.
Description of the drawings
Fig. 1 is the structure diagram of protective case of the present invention, asbestos and roll；
Wherein, 1, protective case, 2, pin hole, 3, asbestos, 4, ledge, 5, slot bottom.
Specific embodiment
The present invention is described in further details with reference to embodiment：
As shown in Figure 1, the concave roll heat treatment method that a kind of body of roll roll neck hardness requirement drop is big, specifically includes following step
Suddenly：
A, modifier treatment is carried out according to material, roll neck hardness requirement, ensures that roll neck hardness is met the requirements, while done for body of roll quenching
Good tissue prepares.
B, it is different according to pass, according to chamfer design principle, chamfered is carried out to ledge 4 and 5 boundary position of slot bottom, is fallen
Angle square cun R30~50mm ensures that pass corner part avoids stress from concentrating and cracking or chipping.
C, according to the roll pass size after thick add, design corresponding annular ledge protective case 1 and wrap 4 periphery of ledge
It covers.
Protective case 1 is circular ring structure, and material ZG45, width and the ledge 4 of protective case 1 are of same size.It is set on protective case 1
There are the pin hole 2 through 1 thickness of protective case, 2 more than one of pin hole, and be distributed on 1 circumference of protective case.
D, according to hardness of roll body requirement and 4 diameter of ledge, the asbestos 3 of stickup different-thickness in the protective case 1 of ledge 4,
Ensure ledge 4 and 5 hardening heat of slot bottom and soaking time.
The wherein thickness q of asbestos 3=（k-100）/ 20*2, q represent the thickness of asbestos, and k represents ledge and the diameter of slot bottom falls
Poor k, unit mm.
E, before body of roll differential heating, pin is installed into pin hole 2, dowel ends withstand asbestos 3, apply footpath to ledge 4
To pressure, protective case 1 is fixed on ledge 4 by pin, while asbestos 3 are filled up in the seam crossing of pin and pin hole.
F, body of roll slot bottom 5, armouring occasionally detection relevant temperature is welded at ledge 4, when can suitably adjust heating according to thermometric situation
Between and furnace temperature.After differential temperature, remove protective case 1 and carry out quenching cooling, it is finally tempered to reach requirement performance.
The present invention provides a kind of body of roll roll neck hardness requirement drop big concave roll heat treatment method, by ledge 4
Upper setting protective case 1 efficiently solves the big concave roll Heat-treatment Problem of body of roll roll neck hardness requirement drop, reduces ledge
4th, 5 differential temperature of slot bottom ensure that ledge 4,5 holding temperature of slot bottom and soaking time, avoid the excessively high caused mistake of 4 temperature of ledge
Burning, even coarse grains, chipping phenomenon, it is ensured that the work layer thickness of slot bottom 4 improves the quality stability of product.
Claims (8)
1. a kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop, first according to the hardness requirement of roll neck into
Then row modifier treatment carries out differential temperature processing to the body of roll, it is characterised in that：Differential temperature before processing is carried out to the body of roll in ledge（4）Outside
Coat protective case（1）.
2. a kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop according to claim 1, special
Sign is：The protective case（1）For circular ring structure, the protective case（1）Width and ledge（4）It is of same size.
3. a kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop according to claim 1, special
Sign is：The protective case（1）On be provided through protective case（1）The pin hole of thickness（2）.
4. a kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop according to claim 3, special
Sign is：The pin hole（2）More than one, and it is distributed on protective case（1）On circumference.
5. a kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop according to claim 1, special
Sign is：The protective case（1）With ledge（4）Between be provided with asbestos（3）, asbestos（3）Thickness q=（k-100）/ 20*2, institute
The thickness that q represents asbestos is stated, k represents the diameter drop of ledge and slot bottom, unit mm.
6. a kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop according to claim 1, special
Sign is：To ledge after the completion of modifier treatment（4）With slot bottom（5）Boundary position progress chamfered, chamfer dimesion R30~
50mm。
7. a kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop according to claim 1, special
Sign is：Differential temperature before processing is carried out to the body of roll in body of roll slot bottom（5）, ledge（4）Weldering detection relevant temperature armouring in place's is even, at differential temperature
Heating time and furnace temperature are adjusted according to the thermometric situation of armouring idol during reason.
8. a kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop according to claim 1, special
Sign is：Protective case（1）Material ZG45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711346445.5A CN108060296A (en) | 2017-12-15 | 2017-12-15 | A kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711346445.5A CN108060296A (en) | 2017-12-15 | 2017-12-15 | A kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108060296A true CN108060296A (en) | 2018-05-22 |
Family
ID=62139008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711346445.5A Pending CN108060296A (en) | 2017-12-15 | 2017-12-15 | A kind of big concave roll heat treatment method of body of roll roll neck hardness requirement drop |
Country Status (1)
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| CN (1) | CN108060296A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139351A (en) * | 2019-12-26 | 2020-05-12 | 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 |
| CN112828221A (en) * | 2020-12-31 | 2021-05-25 | 中钢集团邢台机械轧辊有限公司 | Control method for grain size of blank of roller for forging large-sized battery pole piece |
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|---|---|---|---|---|
| JPH0732127A (en) * | 1992-07-16 | 1995-02-03 | Taiheiyo Seiko Kk | Manufacture of super tough composite differential hardness roll |
| CN201459203U (en) * | 2009-05-26 | 2010-05-12 | 上海重型机器锻件厂 | Roll neck water-cooling jacket for supporting roll differential quenching |
| CN201686727U (en) * | 2010-04-23 | 2010-12-29 | 成都三强轧辊股份有限公司 | Roll neck protective sleeve for roller thermal treatment |
| CN102321795A (en) * | 2011-10-17 | 2012-01-18 | 中钢集团邢台机械轧辊有限公司 | Heat treatment method for high ferrochrome roll requiring stepped hardness of roll body |
| CN102962652A (en) * | 2012-12-17 | 2013-03-13 | 重庆京庆重型机械股份有限公司 | Processing method for roller sleeve of roller press |
| CN103667665A (en) * | 2013-12-06 | 2014-03-26 | 天津重型装备工程研究有限公司 | Differential temperature thermal processing method for high-chromium cast steel centrifugation composite working roll |
| CN206015023U (en) * | 2016-08-31 | 2017-03-15 | 内蒙古包钢钢联股份有限公司 | Surfacing roll roll neck attemperator |
| JP6162982B2 (en) * | 2013-03-05 | 2017-07-12 | 新日鐵住金株式会社 | Skid button |
| CN206458831U (en) * | 2017-03-04 | 2017-09-01 | 一重集团常州华冶轧辊股份有限公司 | A kind of large-scale roller quenches roll neck protection structure |
-
2017
- 2017-12-15 CN CN201711346445.5A patent/CN108060296A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0732127A (en) * | 1992-07-16 | 1995-02-03 | Taiheiyo Seiko Kk | Manufacture of super tough composite differential hardness roll |
| CN201459203U (en) * | 2009-05-26 | 2010-05-12 | 上海重型机器锻件厂 | Roll neck water-cooling jacket for supporting roll differential quenching |
| CN201686727U (en) * | 2010-04-23 | 2010-12-29 | 成都三强轧辊股份有限公司 | Roll neck protective sleeve for roller thermal treatment |
| CN102321795A (en) * | 2011-10-17 | 2012-01-18 | 中钢集团邢台机械轧辊有限公司 | Heat treatment method for high ferrochrome roll requiring stepped hardness of roll body |
| CN102962652A (en) * | 2012-12-17 | 2013-03-13 | 重庆京庆重型机械股份有限公司 | Processing method for roller sleeve of roller press |
| JP6162982B2 (en) * | 2013-03-05 | 2017-07-12 | 新日鐵住金株式会社 | Skid button |
| CN103667665A (en) * | 2013-12-06 | 2014-03-26 | 天津重型装备工程研究有限公司 | Differential temperature thermal processing method for high-chromium cast steel centrifugation composite working roll |
| CN206015023U (en) * | 2016-08-31 | 2017-03-15 | 内蒙古包钢钢联股份有限公司 | Surfacing roll roll neck attemperator |
| CN206458831U (en) * | 2017-03-04 | 2017-09-01 | 一重集团常州华冶轧辊股份有限公司 | A kind of large-scale roller quenches roll neck protection structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139351A (en) * | 2019-12-26 | 2020-05-12 | 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 |
| CN112828221A (en) * | 2020-12-31 | 2021-05-25 | 中钢集团邢台机械轧辊有限公司 | Control method for grain size of blank of roller for forging large-sized battery pole piece |
| CN112828221B (en) * | 2020-12-31 | 2023-02-24 | 中钢集团邢台机械轧辊有限公司 | Method for controlling grain size of blank of large-scale battery pole piece roller |
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Application publication date: 20180522 |