CN106521119B - A kind of method of carbon equivalent high continuous casting steel billet stacking slow cooling - Google Patents
A kind of method of carbon equivalent high continuous casting steel billet stacking slow cooling Download PDFInfo
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- CN106521119B CN106521119B CN201610871228.7A CN201610871228A CN106521119B CN 106521119 B CN106521119 B CN 106521119B CN 201610871228 A CN201610871228 A CN 201610871228A CN 106521119 B CN106521119 B CN 106521119B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 81
- 239000010959 steel Substances 0.000 title claims abstract description 81
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 62
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000010583 slow cooling Methods 0.000 title claims abstract description 22
- 238000009749 continuous casting Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000014759 maintenance of location Effects 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 208000010392 Bone Fractures Diseases 0.000 abstract description 5
- 206010017076 Fracture Diseases 0.000 abstract description 5
- 239000011572 manganese Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000009847 ladle furnace Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/84—Controlled slow cooling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
A kind of method of carbon equivalent high continuous casting steel billet stacking slow cooling, belongs to continuous casting steel billet technical field.Specific steps and parameter is as follows：Surface temperature after carbon equivalent high steel billet is offline is 850~900 DEG C；At the pile bottom, pile top and surrounding of carbon equivalent high steel billet stacking with hot base enclosing, the surface temperature of the hot base in pile bottom, the hot base in pile top and the hot base of surrounding is 300~600 DEG C；The distance controlling of the hot base stacking of surrounding and carbon equivalent high steel billet stacking is in 1.5m~2.0m；Stacking height≤2m of carbon equivalent high steel billet, carbon equivalent high steel billet, the hot base of the hot base in pile bottom and pile top stacking height summation≤2.5m, the hot base stacking height of surrounding not less than carbon equivalent high steel billet, the hot base of the hot base in pile bottom and pile top stacking height summation；120~240h of stacking slow cooling time.After temperature retention time reaches 96h, the surface temperature of carbon equivalent high steel billet and the hot base of surrounding is measured, continuous 48h is in 300 DEG C or less de-stackings.Advantage is：Low cost production, reduces bloom fracture risk, meets the exploitation requirement of carbon equivalent high steel billet product.
Description
Technical field
The invention belongs to continuous casting steel billet technical field, more particularly to a kind of side of carbon equivalent high continuous casting steel billet stacking slow cooling
Method, be primarily adapted for use in carbon equivalent 0.60-1.50% steel grade.
Background technology
Carbon equivalent high (high-carbon or high alloy) steel grade market be widely used it is general, such as plastic die steel, forging axle-steel.
Such steel grade carbon content is high, alloy content is more, and crack sensitivity is high, and production difficulty is big, and added value is also high, becomes current steel enterprise
The focus areas of industry competition.Electric furnace steel making and molding cast are the traditional production procedures of this steel grade.In recent years, with steel row
The depression of industry, pneumatic steelmaking and continuous casting enterprise also begin to trial production carbon equivalent high steel grade with net income increase level, but due to
Most not mating steel billet slow cooling facilities, product quality are difficult to ensure that continuous casting steel billet fracture accident happens occasionally, affect production
Product development process.If newly-built steel billet burial pit facility, site condition are difficult to meet, travelling overhead crane apparatus is also required to accordingly replace, work
Journey difficulty and required investment are all larger, are difficult to realize in short term.In order to solve the problems, such as this, the present invention proposes a kind of continuous casting steel billet heap
The method of pile slow cooling can be stablized and realize carbon equivalent high continuous casting steel billet Slow cooling, effectively reduce bloom fracture risk, be conducive to
The low cost batch production of such steel grade.
Invention content
The purpose of the present invention is to provide a kind of methods of carbon equivalent high continuous casting steel billet stacking slow cooling, solve and are not delaying
The problem of realizing carbon equivalent high continuous casting steel billet slow cooling in the place of cold hole facility, reduces bloom fracture risk, meets high-carbon
The exploitation requirement of equivalent steel billet product.
Present invention is generally directed to the steel grade that carbon equivalent is 0.60~1.50%, steel grade carbon equivalent calculation formula is all made of：Ceq
=C+Mn/6+ (Cr+Mo+V)/5+ (Ni+Cu)/15.
In order to solve the above technical problems, specific steps and technological parameter are as follows：
1, steel billet temperature：Surface temperature after carbon equivalent high steel billet is offline is 850~900 DEG C.
2, stacking：In the pile bottom, pile top and surrounding of carbon equivalent high steel billet stacking hot base enclosing, the hot base in pile bottom, pile top heat
The surface temperature of base and the hot base of surrounding is 300~600 DEG C；The distance controlling of surrounding hot base stacking and carbon equivalent high steel billet stacking
In 1.5m~2.0m；Stacking height≤2m of carbon equivalent high steel billet, carbon equivalent high steel billet, the hot base of the hot base in pile bottom and pile top stacking
Height summation≤2.5m, the hot base stacking height of surrounding is not less than carbon equivalent high steel billet, the heap height of embankment of the hot base of the hot base in pile bottom and pile top
Spend summation；Heap awkward silence at a meeting position avoids place air port and passageway position.
3, slow cooling：120~240h of stacking slow cooling time.After temperature retention time reaches 96h, carbon equivalent high steel billet and surrounding are measured
The surface temperature of the surface temperature of hot base, continuous 48h carbon equivalent highs steel billet and the hot base of surrounding is in 300 DEG C or less de-stackings.
The advantage of the invention is that：
1, the effective Slow cooling for realizing carbon equivalent steel grade continuous casting steel billet within the scope of 0.60-1.50%, avoids steel billet
Fracture occurs.
2, the method can utilize existing tooling device and be realized high with the hot base resource of on-site without newly increasing investment
The low cost production of carbon equivalent steel grade, improves enterprise competitiveness.
Specific implementation mode
Embodiment 1
Certain steel mill carries out carbon equivalent high mould steel 738H and smelts, and process route is " converter smelting-ladle furnace refining-RH
Refining-sheet billet continuous casting ", produces 6 stoves, and chemical composition ranges are carbon content 0.36-0.38%, silicone content 0.25-0.35%, manganese
Content 1.40-1.50%, nickel content 1.10-1.30%, chromium content 1.85-1.95%, content of vanadium 0.098-0.115%, molybdenum contain
Other elements such as 0.18-0.25% and residual phosphorus, sulphur are measured, are computed, carbon equivalent 1.10-1.20%.
1, steel billet temperature：Continuous casting steel billet specifications section is 400mm × 2000mm.The offline rear surface temperature of steel billet is 860-
890℃。
2, stacking：4 blocks of 738H carbon equivalent high steel billets are put per pile, at the pile bottom, pile top and surrounding of carbon equivalent high steel billet stacking
Surface temperature with hot base enclosing, the hot base in pile bottom is 370 DEG C, and the surface temperature of the hot base of surrounding is 300~410 DEG C, the hot base in pile top
Surface temperature be 350 DEG C；The hot base stacking of surrounding and carbon equivalent high steel billet stacking distance 1.6m；The stacking of carbon equivalent high steel billet
Height be 1.6m, carbon equivalent high steel billet, the hot base of the hot base in pile bottom and pile top stacking height summation be 2.2m, the stacking of the hot base of surrounding
Height is 2.5m；Heap awkward silence at a meeting position avoids place air port and passageway position.
3, slow cooling：The stacking slow cooling time is 120h.After slow cooling 96 hours, the surface temperature of carbon equivalent high steel billet is measured, the
One day thermometric billet surface temperature is 270-290 DEG C, second day 230-280 DEG C of thermometric billet surface temperature, de-stacking delivery, through visitor
Family is fed back, and steel billet service condition is good, is not broken.
Embodiment 2
Certain steel mill carries out carbon equivalent high forging axis and is smelted with 35CrMo, and process route is " converter smelting-ladle furnace essence
Refining-RH refinings-sheet billet continuous casting ", produces 5 stoves, and chemical composition ranges are carbon content 0.34-0.36%, silicone content 0.20-
0.35%, manganese content 0.45-0.50%, chromium content 0.90-1.10%, molybdenum content 0.15-0.25% and residual phosphorus, sulphur etc.
Other elements, are computed, carbon equivalent 0.65-0.70%.
1, steel billet temperature：Continuous casting steel billet specifications section is 400mm × 2000mm, and the offline rear surface temperature of steel billet is 860-
900℃。
2, stacking：4 blocks of 35CrMo carbon equivalent high steel billets are put per pile, on the pile bottom of carbon equivalent high steel billet stacking, pile top and four
The surface temperature of all hot base enclosings, the hot base in pile bottom is 390 DEG C, and the surface temperature of the hot base of surrounding is 330~450 DEG C, pile top heat
The surface temperature of base is 370 DEG C；The hot base stacking of surrounding and carbon equivalent high steel billet stacking distance 1.8m；The heap of carbon equivalent high steel billet
Height of embankment degree is 1.6m, and the stacking height summation of the hot bottom base of carbon equivalent high steel billet, pile and the hot base in pile top is 2.4m, the heap of the hot base of surrounding
Height of embankment degree is 2.5m；Heap awkward silence at a meeting position avoids place air port and passageway position.
3, slow cooling：The stacking slow cooling time is 120h.After slow cooling 96 hours, the surface temperature of carbon equivalent high steel billet is measured, the
One day thermometric billet surface temperature is 275-295 DEG C, second day 230-265 DEG C of thermometric billet surface temperature, de-stacking delivery, through visitor
Family is fed back, and steel billet service condition is good, is not broken.
Claims (1)
1. a kind of method of carbon equivalent high continuous casting steel billet stacking slow cooling, which is characterized in that specific steps and technological parameter are as follows：
1) steel billet temperature：Surface temperature after carbon equivalent high steel billet is offline is 850~900 DEG C；
2) stacking：At the pile bottom, pile top and surrounding of carbon equivalent high steel billet stacking with hot base enclosing, the hot base in pile bottom, the hot base in pile top and
The surface temperature of the hot base of surrounding is 300~600 DEG C；The hot base stacking of surrounding and the distance controlling of carbon equivalent high steel billet stacking exist
1.5~2.0m；Stacking height≤2m of carbon equivalent high steel billet, carbon equivalent high steel billet, the hot base of the hot base in pile bottom and pile top heap height of embankment
Summation≤2.5m is spent, the hot base stacking height of surrounding is not less than carbon equivalent high steel billet, the stacking height of the hot base of the hot base in pile bottom and pile top
Summation；Heap awkward silence at a meeting position avoids place air port and passageway position；
3) slow cooling：120~240h of stacking slow cooling time after temperature retention time reaches 96h, measures carbon equivalent high steel billet and the hot base of surrounding
Surface temperature, the surface temperature of continuous 48h carbon equivalent highs steel billet and the hot base of surrounding is in 300 DEG C or less de-stackings；
This method is suitable for the steel grade of carbon equivalent ranging from 0.60~1.50%, and carbon equivalent uses formula Ceq=C+Mn/6+ (Cr+
Mo+V)/5+ (Ni+Cu)/15 is calculated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610871228.7A CN106521119B (en) | 2016-09-30 | 2016-09-30 | A kind of method of carbon equivalent high continuous casting steel billet stacking slow cooling |
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| CN201610871228.7A CN106521119B (en) | 2016-09-30 | 2016-09-30 | A kind of method of carbon equivalent high continuous casting steel billet stacking slow cooling |
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| CN111270042A (en) * | 2020-04-16 | 2020-06-12 | 贝斯山钢(山东)钢板有限公司 | Hydrogen induced crack control method for high-carbon equivalent steel |
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| CN101942557B (en) * | 2010-09-20 | 2012-02-29 | 秦皇岛首秦金属材料有限公司 | Method for accurately controlling hot-conveying charging temperature of casting blanks |
| CN102909334A (en) * | 2012-11-16 | 2013-02-06 | 内蒙古包钢钢联股份有限公司 | Control method for cracks of continuous casting slabs of Cr-contained low alloy steel TDC76 |
| CN104328253A (en) * | 2014-10-08 | 2015-02-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Special thick plate stacking slow-cooling method |
| CN104561477A (en) * | 2015-01-04 | 2015-04-29 | 南京钢铁股份有限公司 | Steel plate stacking and slow-cooling method for improving flaw detection qualification rate of medium plates |
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Effective date of registration: 20190430 Address after: 063200 Iron and Steel Power Park, Caofeidian Industrial Zone, Tangshan City, Hebei Province Patentee after: Shougang Jingtang United Iron & Steel Co., Ltd. Address before: 066326 Duzhuang, Haigang District, Qinhuangdao City, Hebei Province Patentee before: QINHUANGDAO SHOUQIN METAL MATERIAL Co.,Ltd. |
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