CN103599940A - Cooling method of replaced hot rolling roller - Google Patents
Cooling method of replaced hot rolling roller Download PDFInfo
- Publication number
- CN103599940A CN103599940A CN201310624279.6A CN201310624279A CN103599940A CN 103599940 A CN103599940 A CN 103599940A CN 201310624279 A CN201310624279 A CN 201310624279A CN 103599940 A CN103599940 A CN 103599940A
- Authority
- CN
- China
- Prior art keywords
- roll
- cooling water
- cooling
- roller
- water
- 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.)
- Pending
Links
Abstract
The invention relates to a cooling method of a replaced hot rolling roller. The cooling method comprises the steps that 1) the on-line roller before replacing is subjected to pre-cooling through cooling water; 2) the pre-cooled roller is replaced from a machine frame and is hung on a roller placing platform; 3) in the roller replacing period, the roller is naturally cooled; 4) the off-line roller on the roller placing platform is subjected to forcible cooling to be at normal temperature through cooling water. According to the cooling method of the replaced hot rolling roller, the roller is subjected to pre-cooling before roller replacing through cooling water first, then roller replacing is carried out, the roller is subjected to natural cooling during roller replacing, finally the off-machine roller is subjected to forcible cooling through cooling water, accordingly, the roller can be cooled to normal temperature quickly and effectively, and reliable foundations are provided for following roller grinding control.
Description
Technical field
The present invention relates to a kind of cooling means of changing roll for hot-rolling.
Background technology
For hot rolling, due to the belt steel temperature higher (generally 1000 ℃ of left and right) of institute's rolling, so the control of the temperature of breaker roll has proposed corresponding requirement.General roll (being working roll) is in the operation of rolling, the temperature of moment may reach 700-800 ℃, and after the water-cooled through certain hour (gap of rolled band steel), its temperature is roughly controlled at 80 ℃ of left and right, in particular cases, the temperature of roll may reach 100 ℃ of left and right.Due in the operation of rolling, with steel, there is certain skew, cause the Temperature Distribution of roll to present irregular Temperature Distribution, now, the roll shape of roll, due to temperature influence (hot convexity), can show as irregular roll shape; Be subject to the impact of wearing and tearing in the operation of rolling simultaneously, aggravated the generation of irregular roll shape, thus before roll carries out grinding, roll must be cooled to normal temperature, to avoid the impact of roller temperature, i.e. the impact of roller heat convex degree learning breaker roll roll shape.Yet be subject to the impact of inventory cost, must transfer with minimum roll week and meet the requirement of producing, this has proposed new requirement to cooling effect and speed.
According to the existing natural type of cooling, obviously can not meet the requirement that roll uses, for this reason, in recent years, lot of domestic and international iron and steel enterprise is in order to meet the requirement of roll dressing precision, the numerous and confused mode that adopts off-line water-cooled, under breaker roll, the temperature of machine is controlled, and to meet, produces needed roll.Which is for first changing roll, and then, at some cooling water pipes of surrounding's installation of lower machine roll, directly breaker roll is cooled to normal temperature.Because the distribution of roller temperature will directly have influence on the control of grinding quality, for this reason, there are following two problems in which:
1, due to lower machine roller temperature high (generally descending machine roller temperature in 80 degree left and right), diameter thick (600-900mm), because the cooling water electrode of injection of which is inhomogeneous, cause cooling effect poor, and roll is cooled to the time required under normal temperature longer, particularly the temperature Divergent Time at roll center is longer;
2, there is certain hot convexity in the roll due to lower machine, if can not be sufficiently cooled to normal temperature, can affect the original roller type of roll, finally has influence on its grinding accuracy.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide a kind of technical scheme of changing the cooling means of roll for hot-rolling.
Described a kind of cooling means of changing roll for hot-rolling, is characterized in that each components based on weight percentage of this roll is: C:0.85%-1.10%; Si:0.6%-1.0%; Mn:0.20%-0.8%; Cr:5.5%-7.5%; Mo:0.30%-0.8%; V:0.1%-0.3%; Ni≤0.4%; P≤0.020%; S≤0.015%; All the other are Fe and inevitable impurity; The concrete steps of this cooling means are:
1) by cooling water, to the online roll before changing, carry out pre-cooled, it comprises: an a. in the end band steel finished frame throws after steel, open the water discharging board on rolling line, the angle that described water discharging board is opened is and roll axis is 30 degree, the air line distance also and between roll surface is 5-10 centimetre; B. the cooling water collector nozzle breaker roll by water discharging board top sprays cooling water; C. roll is undertaken pre-cooled by cooling water and the cooling water after water discharging board water conservancy diversion of direct injection respectively; D. when roll is shut down and at the uniform velocity sling, cooling water collector stops spraying;
2) roll after pre-cooled is changed to lower bearing bracket, and be hung and put on roller platform;
3) changing in the time period of roll, making roll carry out nature cooling;
4) by cooling water, the roll that rolls off the production line of putting on roller platform is forced to be cooled to normal temperature.
Described a kind of cooling means of changing roll for hot-rolling, is characterized in that, in described step 3), the time of changing roll is 10-20 minute.
Described a kind of cooling means of changing roll for hot-rolling, is characterized in that the concrete steps of described step 4) are: above putting roller platform, the spraying head type shower nozzle that number row is connected with cooling water source is set; In the both sides of putting roller platform, side water fender and cooling water collection channel are set respectively again; By the even spraying cooling water of spraying head type shower nozzle breaker roll, force to be cooled to normal temperature; Finally by side block water plate resistance gear cooling water, splash and reclaim cooling water by cooling water collection channel.
The cooling means of replacing roll for hot-rolling of the present invention for first being undertaken pre-cooled by cooling water breaker roll before roll change, then carry out roll change, and it is cooling to make roll when roll change, carry out nature, finally cooling by the pressure that lower machine roll is carried out to cooling water, thereby make the roll can be fast and be effectively cooled to normal temperature, for follow-up roll dressing, control reliable basis is provided.
The specific embodiment
The present invention changes the cooling means of roll for hot-rolling, and each components based on weight percentage of this roll is: C:0.85%-1.10%; Si:0.6%-1.0%; Mn:0.20%-0.8%; Cr:5.5%-7.5%; Mo:0.30%-0.8%; V:0.1%-0.3%; Ni≤0.4%; P≤0.020%; S≤0.015%; All the other are Fe and inevitable impurity; The concrete steps of this cooling means are:
1) by cooling water, to the online roll before changing, carry out pre-cooled, it comprises: an a. in the end band steel finished frame throws after steel, open the water discharging board on rolling line, the angle that described water discharging board is opened is and roll axis is 30 degree, the air line distance also and between roll surface is 5-10 centimetre; B. the cooling water collector nozzle breaker roll by water discharging board top sprays cooling water; C. roll is undertaken pre-cooled by cooling water and the cooling water after water discharging board water conservancy diversion of direct injection respectively; D. when roll is shut down and at the uniform velocity sling, cooling water collector stops spraying;
2) roll after pre-cooled is changed to lower bearing bracket, and be hung and put on roller platform;
3) changing in the time period of roll, making roll carry out nature cooling;
4) by cooling water, the roll that rolls off the production line of putting on roller platform is forced to be cooled to normal temperature.
Above-mentioned steps 3) in, the time of changing roll is 10-20 minute, and the concrete steps of step 4) are: above putting roller platform, the spraying head type shower nozzle that number row is connected with cooling water source is set; In the both sides of putting roller platform, side water fender and cooling water collection channel are set respectively again; By the even spraying cooling water of spraying head type shower nozzle breaker roll, force to be cooled to normal temperature; Finally by side block water plate resistance gear cooling water, splash and reclaim cooling water by cooling water collection channel.
The cooling means of replacing roll for hot-rolling of the present invention for first being undertaken pre-cooled by cooling water breaker roll before roll change, then carry out roll change, and it is cooling to make roll when roll change, carry out nature, finally cooling by the pressure that lower machine roll is carried out to cooling water, thereby make the roll can be fast and be effectively cooled to normal temperature, for follow-up roll dressing, control reliable basis is provided.
Claims (3)
1. change a cooling means for roll for hot-rolling, it is characterized in that each components based on weight percentage of this roll is: C:0.85%-1.10%; Si:0.6%-1.0%; Mn:0.20%-0.8%; Cr:5.5%-7.5%; Mo:0.30%-0.8%; V:0.1%-0.3%; Ni≤0.4%; P≤0.020%; S≤0.015%; All the other are Fe and inevitable impurity; The concrete steps of this cooling means are:
1) by cooling water, to the online roll before changing, carry out pre-cooled, it comprises: an a. in the end band steel finished frame throws after steel, open the water discharging board on rolling line, the angle that described water discharging board is opened is and roll axis is 30 degree, the air line distance also and between roll surface is 5-10 centimetre; B. the cooling water collector nozzle breaker roll by water discharging board top sprays cooling water; C. roll is undertaken pre-cooled by cooling water and the cooling water after water discharging board water conservancy diversion of direct injection respectively; D. when roll is shut down and at the uniform velocity sling, cooling water collector stops spraying;
2) roll after pre-cooled is changed to lower bearing bracket, and be hung and put on roller platform;
3) changing in the time period of roll, making roll carry out nature cooling;
4) by cooling water, the roll that rolls off the production line of putting on roller platform is forced to be cooled to normal temperature.
2. a kind of cooling means of changing roll for hot-rolling according to claim 1, is characterized in that, in described step 3), the time of changing roll is 10-20 minute.
3. a kind of cooling means of changing roll for hot-rolling according to claim 1, is characterized in that the concrete steps of described step 4) are: above putting roller platform, the spraying head type shower nozzle that number row is connected with cooling water source is set; In the both sides of putting roller platform, side water fender and cooling water collection channel are set respectively again; By the even spraying cooling water of spraying head type shower nozzle breaker roll, force to be cooled to normal temperature; Finally by side block water plate resistance gear cooling water, splash and reclaim cooling water by cooling water collection channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310624279.6A CN103599940A (en) | 2013-12-02 | 2013-12-02 | Cooling method of replaced hot rolling roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310624279.6A CN103599940A (en) | 2013-12-02 | 2013-12-02 | Cooling method of replaced hot rolling roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103599940A true CN103599940A (en) | 2014-02-26 |
Family
ID=50118236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310624279.6A Pending CN103599940A (en) | 2013-12-02 | 2013-12-02 | Cooling method of replaced hot rolling roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103599940A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105107844A (en) * | 2015-07-31 | 2015-12-02 | 铜陵市大明玛钢有限责任公司 | Method for preparing steel cast roller cooling water |
| CN106040746A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Roller cooling method and device |
| CN112464389A (en) * | 2020-10-14 | 2021-03-09 | 首钢京唐钢铁联合有限责任公司 | Determination method and determination device for air cooling temperature of working roll of rolling mill and electronic terminal |
-
2013
- 2013-12-02 CN CN201310624279.6A patent/CN103599940A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105107844A (en) * | 2015-07-31 | 2015-12-02 | 铜陵市大明玛钢有限责任公司 | Method for preparing steel cast roller cooling water |
| CN106040746A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Roller cooling method and device |
| CN112464389A (en) * | 2020-10-14 | 2021-03-09 | 首钢京唐钢铁联合有限责任公司 | Determination method and determination device for air cooling temperature of working roll of rolling mill and electronic terminal |
| CN112464389B (en) * | 2020-10-14 | 2023-02-17 | 首钢京唐钢铁联合有限责任公司 | Determination method and determination device for air cooling temperature of working roll of rolling mill and electronic terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100443201C (en) | Surface iron scale control method for middle sheet billet continuous casting and rolling steel plate | |
| CN102102139B (en) | Wheel quenching device | |
| CN103643155B (en) | A kind of working method of fast quench prestress wire | |
| CN105296853B (en) | A kind of 930MPa high-intensity fine rollings screw-thread steel and its preparation technology | |
| CN104480286A (en) | Quenching device and quenching method for roller sleeve | |
| CN105618491A (en) | Steel plate production method, device and control system for steel plate on-line solution | |
| CN102179407A (en) | Method for preparing hot rolling strip steel capable of preventing edge crack of extremely thin rolled strip steel | |
| CN103599940A (en) | Cooling method of replaced hot rolling roller | |
| CN106269871A (en) | A kind of method producing line employing increasing speed rolling technique production thickness≤2.0mm low-intensity strip steel at CSP | |
| CN109731914A (en) | A kind of milling method for improving double roller continuous casting and rolling belt surface quality | |
| CN103722009A (en) | Bar continuous rolling production line | |
| CN101920264B (en) | Cooling method for replacing hot roll | |
| CN103128106A (en) | Control method for head warping or head down bending for heavy plate rolling | |
| CN103286147B (en) | Hot-rolled board strip production line laminar cooling method | |
| CN103624088B (en) | Eliminate the method for steel plate tail transverse crack | |
| CN108941213B (en) | Rolling method for controlling structural uniformity of high-strength hot-rolled steel plate | |
| CN105057402B (en) | Hot straightening method for low-carbon bainite steel plate with thickness of 25 mm | |
| CN103173688A (en) | High-hardness impact-resistant cold rolled steel working roll and processing technique thereof | |
| CN106734317A (en) | A kind of production method of control normalizing type thin specification steel plate template | |
| CN103486791A (en) | Cooling method for boracic rollers | |
| CN204058549U (en) | A kind of hot rolled strip annealing furnace by-pass collar | |
| CN105127206A (en) | Hot roll replacing and cooling method | |
| CN202667290U (en) | Horizontal sweeping device for furnace rolling mill | |
| CN102586565A (en) | Rapid cooling method and device after medium and thick plate heat treatment furnace | |
| CN204842489U (en) | Online phosphorus removal device of black strip roughing district's secondary |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140226 |