CN103725865A - Steel rolling heating furnace slide block and production method thereof - Google Patents
Steel rolling heating furnace slide block and production method thereof Download PDFInfo
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- CN103725865A CN103725865A CN201310726634.0A CN201310726634A CN103725865A CN 103725865 A CN103725865 A CN 103725865A CN 201310726634 A CN201310726634 A CN 201310726634A CN 103725865 A CN103725865 A CN 103725865A
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Abstract
The invention relates to a steel rolling heating furnace slide block. The upper part and the lower part of the slide block are precisely cast respectively; the upper part of the slide block is made of an alloy with high heat-resistance temperature; the lower part of the slide block is made of an alloy with low heat-resistance temperature; the top of a fishtail member is coated with a high-temperature-resistance heat insulation coating; the upper part and the lower part of the slide block are clamped, welded and subjected to shot blasting treatment after the coating is dried; finally, two rows of slide blocks are crossly welded on a cooling water pipe along the axis of the cooling water pipe. The total heat slide block produced by adopting the method can obviously relieve a heating dark mark of a billet from a furnace; the decreasing amplitude of the temperature difference achieves 50%; the heating waiting time of the heating furnace is shortened after the temperature difference of the dark mark is reduced; the yield of a team or a group is increased by about 3%; the forced heating phenomenon at a high-temperature section is basically removed; the utilization efficiency of coal gas is continuously improved; the coal gas consumption of each ton of steel is reduced by about 7% by the increase of the yield of a unit; the temperature of the high-temperature section of the heating furnace is reduced to about 1,260 DEG C from 1,300 DEG C in the prior art; meanwhile, the in-furnace time of the billet is reduced; the oxygenation loss thickness is reduced about 0.2%.
Description
Technical field
The present invention relates to heater for rolling steel water beam slide block structure and the mode of production and improve technical field, specifically a kind of slide block of heater for rolling steel and production method thereof.
Background technology
Steel billet in heater for rolling steel, under the support of slide block, rises to start rolling temperature by radiation and transmission of heat by convection temperature.Yet due to the bridging effect of bottom water beam and slide block, steel billet constantly transmits heat by slide block to bottom water beam, often low than other positions with the temperature of slide block contact site, forms black seal.Board briquette is inhomogeneous, and the roll in the operation of rolling and press down system are formed to larger impact load.When black seal is serious, the variation in thickness that steel rolling one-level automatization automatic thickness control system can not full remuneration Yin Heiyin produces, cause thickness unplanned, lumber recovery contract delivery economic benefit is all produced to larger impact (Wu Bo, thank to Guangping. on novel slide block Tian steel band steel mill process furnace should [J]. Tianjin is metallurgical, 2004,3:10-11).Nearly 2 years market collapses, the steel that must produce some high added values could meet the requirement of benefit, as production flow line steel X85, gross distortion pipeline X80HD, 9Ni steel etc., the Heating temperature to process furnace like this, the temperature of black seal point has had higher requirement.
At present, for reducing the temperature difference in black seal place and normal heating region, many producers improve the slide block on water beam.Mainly to reduce by increasing thermal resistance the heat that steel billet transmits to water beam.Such as, with being interrupted half heat or the complete hot refractory alloy slide block that distribute, substitute traditional continuous round steel bar; With the larger refractory alloy of thermal resistance, ZGCr28Ni48W5, ZGCr25Ni20, ZGCr25Ni35, ZGCr28Ni48W, IS Co20, IS Co40, IS Co50 etc., substitute 45 traditional steel; Reduce the contact area of slider bottom and water beam to increase thermal resistance.
Shown in the Specification For Structure accompanying drawing 1 of general slide block, as calculated, in process furnace soaking zone, when slide block top E point temperature reaches 1138 ℃, and C point temperature in thermal insulation layer be only 903 ℃ (Zou Fangmao, Shi Lu, Wang Jun etc. the heater for rolling steel water beam pad block temperature computation based on Mathcad and experimental analysis [C]. the Heat Transfer Annual Conference .2012 of Chinese Society of Engineering Thermophysics).In certain limit, the cobalt contents in co-based heat-resisting alloy is higher, and heat resisting temperature is higher, and heat resisting temperature is higher, and alloy cost is also higher.
The cost of refractory alloy is far above traditional carbon steel, and in raw material, pure iron is about 7 000 yuan/ton, pure chromium is about 100 000 yuan/ton, pure nickel is about 100 000 yuan/ton, and pure cobalt is about 400 000 yuan/ton, especially co-based heat-resisting alloy ZGCo20, ZGCo40, ZGCo50.For reducing costs, someone adopts the mode of composite casting, and bottom adopts the low top of heat resisting temperature to adopt the alloy that heat resisting temperature is high to manufacture slide block.
Yet, the porous whole employing of complete hot slide block alloy of the same race, price is relatively high; The thermal resistance of the slide block that composite casting is made is but relatively high.
Therefore, for overcoming the deficiency of above-mentioned technology, design a dark mark that can obviously alleviate the steel billet of coming out of the stove, after the black seal temperature difference reduces, the time of staying temperature of process furnace shortens, the utilising efficiency of coal gas improves constantly, a kind of slide block of heater for rolling steel and the production method thereof that reduce production costs, just contriver's problem to be solved.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of slide block of heater for rolling steel and production method thereof, it is simple in structure, easy to use, can obviously alleviate the dark mark of the steel billet of coming out of the stove, after the black seal temperature difference reduces, the time of staying temperature of process furnace shortens, the utilising efficiency of coal gas improves constantly, and reduces production costs, and has extraordinary practical value.
The technical solution adopted for the present invention to solve the technical problems is: a kind of slide block of heater for rolling steel, it is characterized in that: slide block comprises on slide block part under part, slide block, on slide block, in part, be provided with the protuberance of fishtail type structure and the sunk part of fishtail type structure, under slide block, in part, be provided with the protuberance of fishtail type structure and the sunk part of fishtail type structure corresponding with part on slide block, on slide block, part and slide block bottom adopt running fit.
A kind of production method of steel rolling heating slide block.It is characterized in that following steps:
1) by slider top and bottom individual cast, upper part adopts the high alloy of heat resisting temperature, and lower part adopts the low alloy of heat resisting temperature; 2) at the high temperature resistant adiabatic coating of fishtail type member top coating, top and the bottom engaging, welding, Shot Blasting; 3) slide block is welded on water-cooled tube.
Further, according to slide block production method described in claim 1, it is characterized in that step 1) described refractory alloy is respectively according to stove section is different: heat that 1 section of top is divided into IS Co20, bottom is divided into ZGCr25Ni20Si2; Heat that 2 sections of tops are divided into IS Co50 or IS Co40, bottom is divided into ISCo20; Soaking zone top is divided into IS Co50, bottom is divided into IS Co20;
Further, according to slide block production method described in claim 1, it is characterized in that step 2), described coating is FY-1 high temperature resistant heat insulation coating;
Further, according to slide block production method described in claim 1, it is characterized in that step 2) described welding process is soldering or union-melt weld;
Further, according to slide block production method described in claim 1, it is characterized in that step 2) described brazing rod is the stainless steel electrodes such as A302, A307, A402, A407, Co20, Co50, submerged-arc welding wire is H08Cr26Ni21 or H12Cr26Ni21Si;
Further, according to slide block production method described in claim 1, it is characterized in that step 3) arrangement mode of described slide block on water-cooled tube be double staggered.
The invention has the beneficial effects as follows:
1, through steel mill, produce checking, use common slide block, the maximum black seal temperature difference is up to 150-200 ℃, and the complete hot slide block that uses the present invention to produce can obviously be alleviated the dark mark of the steel billet of coming out of the stove, and the temperature difference decreases by 50%.After the black seal temperature difference reduces, the time of staying temperature of process furnace shortens, and the output of teams and groups improves approximately 3%; And high temperature section is forced also basically eliminate of heating phenomena, the utilising efficiency of coal gas improves constantly.In addition the lifting of unit output, ton steel gas consumption declines approximately 7%; Heating furnace high-temperature section temperature also drops to 1260 ℃ of current left and right from before 1300 ℃, and steel billet time inside furnace reduces simultaneously, and oxidization burning loss thickness reduces approximately 0.2%.The complete hot slide block that the present invention produces was used after 1 year, still kept original geometrical shape, and top abrasion loss is less than 4mm, and at least can reach 3 years work-ing life.
Accompanying drawing explanation
Fig. 1 is conventional sliders structural representation;
Fig. 2 is part-structure schematic diagram on slide block;
Fig. 3 is part-structure schematic diagram under slide block;
Fig. 4 is slide block fishtail type engaging schematic diagram;
Fig. 5 is the arrange schematic diagram of slide block on water beam.
Description of reference numerals: the protuberance of 1-fishtail type structure; The sunk part of 2-fishtail type structure; Part on 3-slide block; Part under 4-slide block; 5-slide block; 6-water beam.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention, should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values drop on application appended claims limited range equally.
A kind of slide block of heater for rolling steel, slide block comprises on slide block part 4 under part 3, slide block, on slide block, in part 3, be provided with the protuberance 1 of fishtail type structure and the sunk part 2 of fishtail type structure, under slide block, in part 4, be provided with the protuberance 1 of fishtail type structure corresponding with part on slide block 3 and the sunk part 2 of fishtail type structure, on slide block, part 3 and slide block bottom 4 adopt running fit.
The technical solution used in the present invention step is as follows:
1) by slide block 5 top and bottom individual casts, upper part adopts the high alloy of heat resisting temperature, and lower part adopts the low alloy of heat resisting temperature; 2) at the high temperature resistant adiabatic coating of fishtail type member top coating, top and the bottom engaging, welding, Shot Blasting; 3) by slide block along the double zigzag weld of water-cooled tube axis thereon.
Step 1) described casting slide block up-down structure respectively as shown in Figure 2 and Figure 3, fishtail type snap-in structure as shown in Figure 4, fishtail type engaging can strengthen the bonding strength between up-down structure, also can position, and guarantees that shape and the size of slide block 5 integral body do not produce the deviation that exceeds regulation.Up-down structure is running fit.According to the requirement of novel slide block 5 working face temperature raisings, should select to be applicable to the heat-resisting allay material of each section of requirement in process furnace, to guarantee high-temperature machinery intensity, creep strength, high-temperature oxidation resistance, wear resistance and the resistance to thermal shocks of slide block 5.Each stove section material is as shown in the table:
Step 2) described high temperature thermal insulation material is FY-1 high temperature resistant heat insulation coating, is coated in slide block top and junction, bottom, and limit portion reserves 1-2mm to facilitate welding.The thermal conductivity of this high temperature material is only 0.03W/m.K, has increased considerably thermal resistance.
Step 2) described welding process can be soldering, union-melt weld.Owing to being foreign material welding, for meeting the heat resistanceheat resistant crack performance of weld metal and the high-temperature behavior of welding joint, during soldering, select the stainless steel electrodes such as A302, A307, A402, A407; During union-melt weld, welding wire is selected H08Cr26Ni21 or H12Cr26Ni21Si.
Step 3) described double staggered mode as shown in Figure 5.
On slide block, part adopts IS Co20, lower part to adopt ZGCr25Ni20Si2 to carry out respectively silica sol precision casting.Then, on the fish tail structure top of top and the bottom, apply FY-1 thermostable heat-isolating coating.After coating is dry, by the two engaging.Adopt H12Cr26Ni21Si stainless steel welding stick, carry out union-melt weld.After Shot Blasting, as shown in Figure 5, slide block 5 is welded on water beam 6.
The upper and lower two portions of slide block separately carry out precision casting, and upper part adopts IS Co40 alloy, and lower part adopts IS Co20 alloy.FY-1 high temperature insulating mould coating is coated in to the top of top and the bottom fishtail type structure.After coating is dry, by the two engaging.Adopt Co20 stainless steel electrode to weld, then Shot Blasting.Finally, the double zigzag weld of slide block 5 is connected on water beam 6.
On slide block, part 3 adopts IS C050, lower part to adopt IS Co20, carries out silicon sol precision-investment casting.Then, on the fish tail structure top of top and the bottom, apply FY-1 thermostable heat-isolating coating.After coating is dry, by the two engaging.Adopt Co50 stainless steel electrode to weld.After Shot Blasting, slide block is welded on to Shui Liangshang.
Through steel mill, produce checking, use common slide block, the maximum black seal temperature difference is up to 150-200 ℃, and the complete hot slide block 5 that uses the present invention to produce can obviously be alleviated the dark mark of the steel billet of coming out of the stove, and the temperature difference decreases by 50%.After the black seal temperature difference reduces, the time of staying temperature of process furnace shortens, and the output of teams and groups improves approximately 3%; And high temperature section is forced also basically eliminate of heating phenomena, the utilising efficiency of coal gas improves constantly.In addition the lifting of unit output, ton steel gas consumption declines approximately 7%; Heating furnace high-temperature section temperature also drops to 1260 ℃ of current left and right from before 1300 ℃, and steel billet time inside furnace reduces simultaneously, and oxidization burning loss thickness reduces approximately 0.2%.The complete hot slide block that the present invention produces was used after 1 year, still kept original geometrical shape, and top abrasion loss is less than 4mm, and at least can reach 3 years work-ing life.
Claims (7)
1. a slide block of heater for rolling steel, it is characterized in that: slide block comprises on slide block part under part, slide block, on slide block, in part, be provided with the protuberance of fishtail type structure and the sunk part of fishtail type structure, under slide block, in part, be provided with the protuberance of fishtail type structure and the sunk part of fishtail type structure corresponding with part on slide block, on slide block, part and slide block bottom adopt running fit.
2. the production method of a kind of slide block of heater for rolling steel according to claim 1, it is characterized in that production method comprises step: 1) by slider top and bottom individual cast, upper part adopts the high alloy of heat resisting temperature, and lower part adopts the low alloy of heat resisting temperature; 2) at the high temperature resistant adiabatic coating of fishtail type member top coating, top and the bottom engaging, welding, Shot Blasting; 3) slide block is welded on water-cooled tube.
3. the production method of a kind of slide block of heater for rolling steel according to claim 2, is characterized in that step 1) described refractory alloy is respectively according to stove section is different: heat that 1 section of top is divided into IS Co20, bottom is divided into ZGCr25Ni20Si2; Heat that 2 sections of tops are divided into IS Co50 or IS Co40, bottom is divided into ISCo20; Soaking zone top is divided into IS Co50, bottom is divided into IS Co20.
4. the production method of a kind of slide block of heater for rolling steel according to claim 2, is characterized in that step 2), described coating is FY-1 high temperature resistant heat insulation coating.
5. the production method of a kind of slide block of heater for rolling steel according to claim 2, is characterized in that step 2) described welding process is soldering or union-melt weld.
6. the production method of a kind of slide block of heater for rolling steel according to claim 2, it is characterized in that in step 2) described brazing rod is the stainless steel electrodes such as A302, A307, A402, A407, Co20, Co50, submerged-arc welding wire is H08Cr26Ni21 or H12Cr26Ni21Si.
7. the production method of a kind of slide block of heater for rolling steel according to claim 2, is characterized in that step 3) arrangement mode of described slide block on water-cooled tube be double staggered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310726634.0A CN103725865A (en) | 2013-12-23 | 2013-12-23 | Steel rolling heating furnace slide block and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310726634.0A CN103725865A (en) | 2013-12-23 | 2013-12-23 | Steel rolling heating furnace slide block and production method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966419A (en) * | 2014-05-23 | 2014-08-06 | 上海宝钢节能环保技术有限公司 | Heat-resisting sliding block of steel rolling heating furnace |
| CN106498147A (en) * | 2016-12-14 | 2017-03-15 | 四川德胜集团钒钛有限公司 | A kind of preparation technology of slide block of heater for rolling steel |
| CN107916327A (en) * | 2017-10-24 | 2018-04-17 | 芜湖新兴铸管有限责任公司 | Heater for rolling steel |
| CN111721130A (en) * | 2019-11-15 | 2020-09-29 | 北京科大京都高新技术有限公司 | Heat-resisting cushion block fixing structure for steel rolling heating furnace |
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| CN1212358A (en) * | 1997-09-23 | 1999-03-31 | 马燕宁 | Composite heel block for billet heating furnace and its manufacturing technology |
| CN2374552Y (en) * | 1999-07-16 | 2000-04-19 | 马华政 | Bimetal heel for billet heating furnace |
| CN2503440Y (en) * | 2001-11-02 | 2002-07-31 | 张业彭 | Anti-drop combined slider for steel rolling furnace |
| CN2789272Y (en) * | 2005-04-18 | 2006-06-21 | 邯郸钢铁股份有限公司 | Steel rolling heating furnace special shaped heat resisting steel sliding block |
| CN2849619Y (en) * | 2005-12-16 | 2006-12-20 | 王洪大 | Sliding block for heating furnace |
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2013
- 2013-12-23 CN CN201310726634.0A patent/CN103725865A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1212358A (en) * | 1997-09-23 | 1999-03-31 | 马燕宁 | Composite heel block for billet heating furnace and its manufacturing technology |
| CN2374552Y (en) * | 1999-07-16 | 2000-04-19 | 马华政 | Bimetal heel for billet heating furnace |
| CN2503440Y (en) * | 2001-11-02 | 2002-07-31 | 张业彭 | Anti-drop combined slider for steel rolling furnace |
| CN2789272Y (en) * | 2005-04-18 | 2006-06-21 | 邯郸钢铁股份有限公司 | Steel rolling heating furnace special shaped heat resisting steel sliding block |
| CN2849619Y (en) * | 2005-12-16 | 2006-12-20 | 王洪大 | Sliding block for heating furnace |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966419A (en) * | 2014-05-23 | 2014-08-06 | 上海宝钢节能环保技术有限公司 | Heat-resisting sliding block of steel rolling heating furnace |
| CN103966419B (en) * | 2014-05-23 | 2016-04-27 | 上海宝钢节能环保技术有限公司 | A kind of heater for rolling steel heat temperature resisting sliding lumps |
| CN106498147A (en) * | 2016-12-14 | 2017-03-15 | 四川德胜集团钒钛有限公司 | A kind of preparation technology of slide block of heater for rolling steel |
| CN107916327A (en) * | 2017-10-24 | 2018-04-17 | 芜湖新兴铸管有限责任公司 | Heater for rolling steel |
| CN111721130A (en) * | 2019-11-15 | 2020-09-29 | 北京科大京都高新技术有限公司 | Heat-resisting cushion block fixing structure for steel rolling heating furnace |
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Application publication date: 20140416 |