CN100463981C - Method of preparing forging steel cold roll without soft band - Google Patents
Method of preparing forging steel cold roll without soft band Download PDFInfo
- Publication number
- CN100463981C CN100463981C CNB2007100213898A CN200710021389A CN100463981C CN 100463981 C CN100463981 C CN 100463981C CN B2007100213898 A CNB2007100213898 A CN B2007100213898A CN 200710021389 A CN200710021389 A CN 200710021389A CN 100463981 C CN100463981 C CN 100463981C
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- roll body
- limit portion
- roll
- heat
- soft band
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses a manufacturing method of a hammered steel cold roller no soft strip in the cold roller manufacturing technique field for hammered steel industry, which comprises the following steps: improving two sides temperature of roller the same as intermediate section temperature of roller when eddy-current heating; controlling cooling medium of two sides temperature of roller and the other section when heat hardening. The invention has the advantages: meeting the requirements of two side hardness of roller same as the other section of roller; removing soft strip of roller two-side.
Description
Technical field
The present invention relates to a kind of method of preparing forging steel cold roll without soft band, belong to the employed cold roll manufacturing technology of steel rolling industry field.
Background technology
Industry is known, and steel rolling industry cold rolled sheet must use cold roll (being commonly referred to cold roll), for some technical indicator of cold roll particularly the hardness indication to require be very harsh, be generally 〉=90HSD.Induction quenching is the vital processing step together in the cold roll preparation process, at present domestic cold roll is carried out induction quenching after, the hardness that all has certain-length at roll body edges at two ends position to some extent is lower than the zone at other position of roll body, and this zone is referred to as soft region usually.
Because soft region hardness is relatively low, generally can not participate in rolling to steel plate, and soft band is long more, body of roll length available is short more, thus cause rolling sheet material width be restricted.If soft band has surpassed the length that technical requirements is limit, soft region participates in normal rolling working range (claiming workspace again), roll body hardness normal region can cause the became uneven of institute's rolled steel plate even in the operation of rolling with soft region because of the degree of wear is different so, and strip shape quality can not get ensureing.So soft band is a reflection cold roll quality level, relate to the vital factor of steel sheet product quality again.
Along with coming into operation of the large quantities of modernized cold-rolling mills of China, harsh day by day to cold-rolled steel sheet template specification of quality, thereby corresponding requirement has been proposed also cold roll, that is: require the soft region at cold roll roll body edges at two ends position shorter and shorter, even be tending towards not having soft band, yet existing induction quenching technology can't ensure at all or claim to satisfy above-mentioned requirements.
Induction quenching to cold roll is that the mode that adopts limit portion (roll body edges at two ends) temperature to be lower than roll body normal heating temperature is carried out at present, and undoubtedly, so mode certainly exists soft band.And if improve the Heating temperature of opposite side portion simply, use and improve limit portion zone hardness or shorten soft strip length, so just, can produce the problem of attending to one thing and lose sight of another, turning round and look at this is and aforesaidly can improves hardness to a certain extent or control soft region, losing that is limit portion crackle very easily takes place or the come off phenomenon of (claim again collapse limit) of limit portion in the Cooling Quenching process, cause the appearance of waste product roller, blemishes roller, this is very to abstain from for the cold roll manufacturing, and does one's utmost again to avoid.
Based on above-mentioned factor, both having heard up to now has the thing of enterprise to the success of the no soft band of roll body edges at two ends position release of cold roll, the example of also not seeing the breakthrough that bibliographical information is arranged.
Summary of the invention
Task of the present invention is that a kind of method of preparing forging steel cold roll without soft band will be provided, and this method can ensure that roll body edges at two ends position do not have soft region and exist.
Task of the present invention is finished like this, a kind of method of preparing forging steel cold roll without soft band, it comprises the induction quenching step, and characteristics are: when induction heating, bring up to roll body two ends limit portion Heating temperature consistent with the Heating temperature of roll body central region; When after induction heating is finished, quenching, to acting on other the regional heat-eliminating medium implementation gradient control of roll body two ends limit portion zone and roll body.
Roll body of the present invention two ends limit portion Heating temperature is 860-950 ℃.
Gradient control of the present invention is meant roll body two ends limit portion zone is imposed little heat-eliminating medium amount, after avoiding roll body two ends limit portion zone, other zone of roll body is increased the heat-eliminating medium amount.
Little heat-eliminating medium amount of the present invention is 100-170m
3/ h, and described increase heat-eliminating medium amount is for increasing to 200-400m
3/ h.
Heat-eliminating medium of the present invention is a water.
The advantage of the inventive method: the hardness of the roll body two ends limit portion of resulting cold roll is satisfied and other regional corresponding to hardness requirement of roll body, eliminated the phenomenon that leaves soft region in the prior art in roll body two ends limit portion.
Embodiment
Embodiment 1:
With the preparation material is that the cold roll of Cr2 (chromium content 2%), φ 400mm, roll body hardness 90-95HSD, soft band requirement≤50mm is an example.
The inductor block that roll body after will processing via the step in preceding road is sent into induction heating device carries out induction heating, because roll body two ends limit portion shape is sharp-pointed relatively, there is sharp angle effect, be that inductive loop is concentrated relatively herein, it is very fast to heat up, so the induction heating power of the inductor block of induction heating device is controlled at 70% of roll body normal heating power, can realize that roll body two ends limit portion reaches 860 ℃, for example during this roll body normal heating to 860 ℃, power is about 460KW, in the about 50mm scope in the soft region of roll body edges at two ends, power setting is 70% of 460KW, thereby can realize the even heating of 860 ℃ of non-soft zone (removing roll body two ends limit portion other zone of extra-regional roll body) uniform temps, make the abundant austenitizing of roll body two ends edging tissue, in heat-processed, roll body moves with respect to the well heater continuously and smoothly, adjustment by limit portion heating power, roll body two ends limit portion realizes heat in movement continuously, when roll body two ends limit portion external phase enters for example i.e. quenching of water-jet cooling of heat-eliminating medium injector to shifting out inductor block; When quenching, to each 50mm zone of roll body two ends limit portion of shifting out inductor block with 110m
3The little amount of cooling water of/h will be reached or claim spray by the water-jet spray as the water of heat-eliminating medium, this little amount of cooling water can reduce the cooling intensity to the 50mm zone, reduce roll body two ends limit portion stress, peel off to avoid limit portion crackle and limit portion effectively, behind the sensitizing range of keeping away roll body two ends limit portion, to improve as the water yield of heat-eliminating medium, specifically: avoid each 50mm zone, roll body two ends, with 260m
3The cooling water inflow of/h spray and to all the other zones of roll body, finish quenching after, through follow-up low-temperaturetempering, resulting cold roll is detected, and the result shows that the hardness of soft region is 91-92HSD, and the hardness of non-soft region is 91-93HSD, flawless and peeling off has satisfied no soft band requirement.Above mentioned induction heating device can adopt the induction heating machine of producing such as by Baoding, Chinese Hebei province three Yi Tianxing Electric Applicance Co., Ltd or Chinese Henan Province Zhengzhou City's Kechuang Electronics Co., Ltd., but the preferred multi-functional rolling quenching machine of producing and selling by the precious roll of Changshu City, Jiangsu Province, China steel institute of CS-III type that adopts.
Embodiment 2:
With the preparation material is that the cold roll of Cr3 (chromium content 3%), φ 500mm, roll body hardness 92-96HSD, soft band requirement≤40mm is an example.
The inductor block that roll body after will processing via the step in preceding road is sent into induction heating device carries out induction heating, because roll body two ends limit portion shape is sharp-pointed relatively, there is sharp angle effect, be that inductive loop is concentrated relatively herein, it is very fast to heat up, so the induction heating power of the inductor block of induction heating device is controlled at 70% of roll body normal heating power, can realize that roll body two ends limit portion reaches 900 ℃, for example during this roll body normal heating to 900 ℃, power is about 540KW, in the about 40mm scope in the soft region of roll body edges at two ends, power setting is 70% of 540KW, thereby can realize the even heating of 900 ℃ of non-soft zone (removing roll body two ends limit portion other zone of extra-regional roll body) uniform temps, make the abundant austenitizing of roll body two ends edging tissue, in heat-processed, roll body moves with respect to the well heater continuously and smoothly, adjustment by limit portion heating power, roll body two ends limit portion realizes heat in movement continuously, when roll body two ends limit portion external phase enters for example i.e. quenching of water-jet cooling of heat-eliminating medium injector to shifting out inductor block; When quenching, to each 40mm zone of roll body two ends limit portion of shifting out inductor block with 130m
3The little amount of cooling water of/h will be reached or claim spray by the water-jet spray as the water of heat-eliminating medium, this little amount of cooling water can reduce the cooling intensity to the 40mm zone, reduce roll body two ends limit portion stress, peel off to avoid limit portion crackle and limit portion effectively, behind the sensitizing range of keeping away roll body two ends limit portion, to improve as the water yield of heat-eliminating medium, specifically: avoid each 40mm zone, roll body two ends, with 300m
3The cooling water inflow of/h spray and to all the other zones of roll body, finish quenching after, through follow-up low-temperaturetempering, resulting cold roll is detected, and the result shows that the hardness of soft region is 92-93HSD, and the hardness of non-soft region is 93-95HSD, flawless and peeling off has satisfied no soft band requirement.
Embodiment 3:
With the preparation material is that the cold roll of Cr5 (chromium content 5%), φ 560mm, roll body hardness 93-97HSD, soft band requirement≤35mm is an example.
The inductor block that roll body after will processing via the step in preceding road is sent into induction heating device carries out induction heating, because roll body two ends limit portion shape is sharp-pointed relatively, there is sharp angle effect, be that inductive loop is concentrated relatively herein, it is very fast to heat up, so the induction heating power of the inductor block of induction heating device is controlled at 70% of roll body normal heating power, can realize that roll body two ends limit portion reaches 950 ℃, for example during this roll body normal heating to 950 ℃, power is about 620KW, in the about 35mm scope in the soft region of roll body edges at two ends, power setting is 70% of 620KW, thereby can realize the even heating of 950 ℃ of non-soft zone (removing roll body two ends limit portion other zone of extra-regional roll body) uniform temps, make the abundant austenitizing of roll body two ends edging tissue, in heat-processed, roll body moves with respect to the well heater continuously and smoothly, adjustment by limit portion heating power, roll body two ends limit portion realizes heat in movement continuously, when roll body two ends limit portion external phase enters for example i.e. quenching of water-jet cooling of heat-eliminating medium injector to shifting out inductor block; When quenching, to each 35mm zone of roll body two ends limit portion of shifting out inductor block with 150m
3The little amount of cooling water of/h will be reached or claim spray by the water-jet spray as the water of heat-eliminating medium, this little amount of cooling water can reduce the cooling intensity to the 35mm zone, reduce roll body two ends limit portion stress, peel off to avoid limit portion crackle and limit portion effectively, behind the sensitizing range of keeping away roll body two ends limit portion, to improve as the water yield of heat-eliminating medium, specifically: avoid each 35mm zone, roll body two ends, with 360m
3The cooling water inflow of/h spray and to all the other zones of roll body, finish quenching after, through follow-up low-temperaturetempering, resulting cold roll is detected, and the result shows that the hardness of soft region is 91-92HSD, and the hardness of non-soft region is 91-93HSD, flawless and peeling off has satisfied no soft band requirement.
Claims (4)
1. method of preparing forging steel cold roll without soft band, it comprises the induction quenching step, it is characterized in that when induction heating, brings up to roll body two ends limit portion Heating temperature consistent with the Heating temperature of roll body central region; When after induction heating is finished, quenching, to acting on other the regional heat-eliminating medium amount implementation gradient control of roll body two ends limit portion zone and roll body.
2. method of preparing forging steel cold roll without soft band according to claim 1 is characterized in that described roll body two ends limit portion Heating temperature is 860-950 ℃.
3. method of preparing forging steel cold roll without soft band according to claim 1 is characterized in that the control of described gradient is meant roll body two ends limit portion zone is imposed 100-170m
3/ h heat-eliminating medium amount after avoiding roll body two ends limit portion zone, imposes 200-400m to other zone of roll body
3/ h heat-eliminating medium amount.
4. according to claim 1 or 3 described method of preparing forging steel cold roll without soft band, it is characterized in that described heat-eliminating medium is a water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100213898A CN100463981C (en) | 2007-04-06 | 2007-04-06 | Method of preparing forging steel cold roll without soft band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100213898A CN100463981C (en) | 2007-04-06 | 2007-04-06 | Method of preparing forging steel cold roll without soft band |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101058844A CN101058844A (en) | 2007-10-24 |
| CN100463981C true CN100463981C (en) | 2009-02-25 |
Family
ID=38865149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100213898A Expired - Fee Related CN100463981C (en) | 2007-04-06 | 2007-04-06 | Method of preparing forging steel cold roll without soft band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100463981C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11486149B2 (en) | 2012-10-22 | 2022-11-01 | Shaw Industries Group, Inc. | Engineered waterproof plastic composite flooring and wall covering planks |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323899B (en) * | 2008-04-15 | 2010-06-02 | 上海恒精机电设备有限公司 | Quenching machine tool without soft belt |
| CN102766753A (en) * | 2012-08-08 | 2012-11-07 | 耿震宇 | Forged steel cold roll induction quenching cooling method |
| CN105087893A (en) * | 2015-08-21 | 2015-11-25 | 宝钢轧辊科技有限责任公司 | Method for controlling no soft strip at end part of roller body of large forged steel support roller after quenching |
| CN114425620B (en) * | 2022-02-07 | 2023-05-09 | 上海交通大学 | Equipment and method for preparing rolls |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044390C (en) * | 1995-10-04 | 1999-07-28 | 重庆钢铁股份有限公司 | Heat treatment for eliminating soft zone in supporting roll |
| JP2000017341A (en) * | 1998-07-02 | 2000-01-18 | Nippon Steel Corp | Hardening method of work roll for cold rolling |
| JP2000297328A (en) * | 1999-04-13 | 2000-10-24 | Nippon Steel Corp | Heat treatment equipment for weld overlays with excellent heat crack resistance |
| US20020084009A1 (en) * | 2000-09-15 | 2002-07-04 | Metso Paper, Inc. | Method for making a roll shell of a roll used in the manufacture or further processing of paper and/or board |
-
2007
- 2007-04-06 CN CNB2007100213898A patent/CN100463981C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044390C (en) * | 1995-10-04 | 1999-07-28 | 重庆钢铁股份有限公司 | Heat treatment for eliminating soft zone in supporting roll |
| JP2000017341A (en) * | 1998-07-02 | 2000-01-18 | Nippon Steel Corp | Hardening method of work roll for cold rolling |
| JP2000297328A (en) * | 1999-04-13 | 2000-10-24 | Nippon Steel Corp | Heat treatment equipment for weld overlays with excellent heat crack resistance |
| US20020084009A1 (en) * | 2000-09-15 | 2002-07-04 | Metso Paper, Inc. | Method for making a roll shell of a roll used in the manufacture or further processing of paper and/or board |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11486149B2 (en) | 2012-10-22 | 2022-11-01 | Shaw Industries Group, Inc. | Engineered waterproof plastic composite flooring and wall covering planks |
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| Publication number | Publication date |
|---|---|
| CN101058844A (en) | 2007-10-24 |
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Granted publication date: 20090225 Termination date: 20140406 |