CN111318566A - Production method of iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil - Google Patents
Production method of iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 84
- -1 iron-chromium-aluminum Chemical compound 0.000 title claims abstract description 83
- 238000009749 continuous casting Methods 0.000 title claims abstract description 77
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 76
- 239000010959 steel Substances 0.000 title claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000005098 hot rolling Methods 0.000 claims abstract description 23
- 238000005096 rolling process Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims 1
- 239000007921 spray Substances 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract 1
- 230000007704 transition Effects 0.000 description 5
- 239000011651 chromium Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- 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
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- 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
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- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling
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- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/06—Width
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
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Abstract
本发明公开了一种铁铬铝合金连铸板坯热轧钢卷的生产方法，包括下述步骤：将铁铬铝合金连铸板坯装入加热炉，其中所述铁铬铝合金连铸板坯装炉前的表面温度控制为大于等于50℃；将加热炉在0.5小时～6小时内加热到1100℃～1200℃，然后保温30分钟～250分钟；将铁铬铝合金连铸板坯从加热炉取出进行热轧，热轧钢卷的过程温度及终轧温度控制在600℃～1200℃，热轧后钢带的厚度控制为1.2mm～8.0mm；热轧完毕后，喷水冷却钢带，在15秒～30秒内将钢带表面温度降低到200℃～450℃，然后进行卷取成卷。本发明的生产方法能够使钢卷在后续工序顺利打开，不会发生断带现象。The invention discloses a method for producing an iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil, which comprises the following steps: loading the iron-chromium-aluminum alloy continuous casting slab into a heating furnace, wherein the iron-chromium-aluminum alloy continuous casting The surface temperature of the slab before being loaded into the furnace is controlled to be greater than or equal to 50°C; the heating furnace is heated to 1100°C to 1200°C within 0.5 hours to 6 hours, and then kept for 30 minutes to 250 minutes; Take out from the heating furnace for hot rolling, the process temperature and final rolling temperature of the hot rolled steel coil are controlled at 600℃～1200℃, and the thickness of the steel strip after hot rolling is controlled at 1.2mm～8.0mm; after the hot rolling is completed, water spray cooling For the steel strip, reduce the surface temperature of the steel strip to 200°C to 450°C within 15 seconds to 30 seconds, and then coil it into coils. The production method of the present invention can enable the steel coil to be smoothly opened in the subsequent process, and the phenomenon of strip breakage will not occur.
Description
技术领域technical field
本发明总体上涉及电热合金钢卷热加工技术领域。更具体地涉及一种铁铬铝合金连铸板坯热轧钢卷的生产方法。The present invention generally relates to the technical field of thermal processing of electrothermal alloy steel coils. More specifically, it relates to a production method of iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil.
背景技术Background technique
铁铬铝合金是铁素体组织的电热合金材料，主要牌号有：1Cr13Al4、0Cr21Al5、0Cr21Al6、0Cr25Al5和0Cr27Al7Mo2等钢种(GB/T 1234、ASTM B 603中或其它标准规定的电热合金铁铬铝牌号)，广泛地应用于电热、环保等领域。目前主要采用电渣重熔后锻造板坯、锻造板坯冷态装入加热炉加热后热轧钢卷，来生产铁铬铝合金带材。现有的铁铬铝合金连铸板坯热轧钢卷的生产方法效率低下、产品规格有限。Iron-chromium-aluminum alloy is an electrothermal alloy material with ferritic structure. brand), widely used in electric heating, environmental protection and other fields. At present, iron-chromium-aluminum alloy strips are mainly produced by forging slabs after electroslag remelting, and hot-rolled steel coils after cold loading of the forged slabs into a heating furnace for heating. The existing iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil production methods have low efficiency and limited product specifications.
尤其是，采用现有的铁铬铝合金连铸板坯热轧钢卷的生产方法，在用铁铬铝合金连铸板坯生产宽度200mm～2050mm、厚度1.2mm～8.0mm的热轧钢卷时，连铸板坯加热温度及钢卷卷取温度控制不合适时，容易造成铁铬铝合金热卷开卷断带，这主要是由于钢卷脆韧转变温度(通过检测铁铬铝合金连铸板坯热轧钢卷的横向“U”型0℃～90℃冲击值即可得出)高于60℃。然而，目前为止，尚无专门针对铁铬铝合金连铸板坯热轧生产宽度200mm～2050mm、厚度1.2mm～8.0mm的热轧钢卷的技术。In particular, by using the existing method for producing iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coils, the iron-chromium-aluminum alloy continuous casting slabs are used to produce hot-rolled steel coils having a width of 200 mm to 2050 mm and a thickness of 1.2 mm to 8.0 mm. When the heating temperature of the continuous casting slab and the coiling temperature of the steel coil are not properly controlled, it is easy to cause the iron-chromium-aluminum alloy hot coil to be uncoiled and broken. The transverse "U" shape of the slab hot-rolled coil can be obtained from the impact value of 0°C to 90°C) higher than 60°C. However, so far, there is no technology dedicated to producing hot-rolled coils with a width of 200 mm to 2050 mm and a thickness of 1.2 mm to 8.0 mm for the hot rolling of iron-chromium-aluminum alloy continuous casting slabs.
发明内容SUMMARY OF THE INVENTION
为了解决现有技术中存在的上述技术问题，本发明提供一种铁铬铝合金连铸板坯热轧钢卷的生产方法，其可以生产宽度200mm～2050mm、厚度2.0mm～8.0mm的热轧钢卷，同时将钢卷脆韧转变温度降低到小于60℃而消除了铁铬铝合金热卷开卷断带的问题，并拓宽了铁铬铝合金带材的应用范围。In order to solve the above-mentioned technical problems existing in the prior art, the present invention provides a method for producing iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coils, which can produce hot-rolled steel coils with a width of 200mm to 2050mm and a thickness of 2.0mm to 8.0mm. At the same time, the brittle-ductile transition temperature of the steel coil is reduced to less than 60 ° C, which eliminates the problem of uncoiling and breaking of the iron-chromium-aluminum alloy hot coil, and broadens the application range of the iron-chromium-aluminum alloy strip.
本发明的铁铬铝合金连铸板坯热轧钢卷的生产方法包括下述步骤：The production method of the iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil of the present invention comprises the following steps:
步骤1：将铁铬铝合金连铸板坯装入加热炉，其中所述铁铬铝合金连铸板坯装炉前的表面温度控制为大于等于50℃；Step 1: Load the iron-chromium-aluminum alloy continuous casting slab into the heating furnace, wherein the surface temperature of the iron-chromium-aluminum alloy continuous casting slab before being loaded into the furnace is controlled to be greater than or equal to 50°C;
步骤2：将加热炉在0.5小时～6小时内加热到1100℃～1200℃，然后保温30分钟～250分钟；Step 2: heat the heating furnace to 1100℃～1200℃ within 0.5 hour～6 hours, and then keep the temperature for 30 minutes～250 minutes;
步骤3：将铁铬铝合金连铸板坯从加热炉取出进行热轧，热轧钢卷的过程温度及终轧温度控制在600℃～1200℃，热轧后钢带的厚度控制为1.2mm～8.0mm；Step 3: The iron-chromium-aluminum alloy continuous casting slab is taken out from the heating furnace for hot rolling, the process temperature and final rolling temperature of the hot-rolled steel coil are controlled at 600 ° C ~ 1200 ° C, and the thickness of the steel strip after hot rolling is controlled at 1.2mm ~8.0mm;
步骤4：热轧完毕后，喷水冷却钢带，在15秒～30秒内将钢带表面温度降低到200℃～450℃，然后进行卷取成卷。Step 4: After the hot rolling is completed, spray water to cool the steel strip, reduce the surface temperature of the steel strip to 200°C to 450°C within 15 seconds to 30 seconds, and then coil it into coils.
优选地，在上述步骤3中，采用热连轧机或炉卷轧机对铁铬铝合金连铸板坯进行热轧。Preferably, in the above step 3, a hot continuous rolling mill or a furnace coil rolling mill is used to hot-roll the iron-chromium-aluminum alloy continuous casting slab.
优选地，在上述铁铬铝合金连铸板坯热轧钢卷的生产方法中，以牌号为1Cr13Al4、0Cr21Al5、0Cr21Al6、0Cr25Al5和0Cr27Al7Mo2等的铁铬铝合金连铸板坯为原料，该铁铬铝合金连铸板坯的规格为：厚度120～250mm，宽度200～2050mm。Preferably, in the above-mentioned production method of the iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil, the iron-chromium-aluminum alloy continuous casting slabs with the grades of 1Cr13Al4, 0Cr21Al5, 0Cr21Al6, 0Cr25Al5 and 0Cr27Al7Mo2 are used as raw materials, and the iron-chromium aluminum alloy continuous casting slabs are used as raw materials. The specifications of aluminum alloy continuous casting slab are: thickness 120-250mm, width 200-2050mm.
作为一种具体实施方式，在上述铁铬铝合金连铸板坯热轧钢卷的生产方法中，以牌号为0Cr21Al6的铁铬铝合金连铸板坯为原料，其化学成分按质量百分比为：C：0.008％、Si：0.21％、Mn：0.10％、Al：5.5％、Cr：19.8％、La：0.07％、Ti：0.11％、Nb：0.09％、P：0.021％、S：0.001％，其余为Fe及其它不可避免的杂质，所述铁铬铝合金连铸板坯的规格为：厚度180mm，宽度1080mm，其中：在所述步骤1中，铁铬铝合金连铸板坯装炉前的表面温度控制为168℃～320℃；在所述步骤2中，将加热炉在3小时内加热到1120℃～1180℃，然后保温50分钟；在所述步骤3中，采用热连轧机对铁铬铝合金连铸板坯进行热轧，热轧钢卷的过程温度及终轧温度控制在720℃～1185℃，热轧后钢带的厚度控制为2.8mm；在所述步骤4中，在15秒内将钢带表面温度降低到275℃～388℃，然后进行卷取成卷。As a specific embodiment, in the production method of the above-mentioned iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil, the iron-chromium-aluminum alloy continuous casting slab with the grade of 0Cr21Al6 is used as a raw material, and its chemical composition is by mass percentage: C: 0.008%, Si: 0.21%, Mn: 0.10%, Al: 5.5%, Cr: 19.8%, La: 0.07%, Ti: 0.11%, Nb: 0.09%, P: 0.021%, S: 0.001%, The rest are Fe and other unavoidable impurities. The specifications of the iron-chromium-aluminum alloy continuous casting slab are: thickness 180mm, width 1080mm, wherein: in the step 1, the iron-chromium-aluminum alloy continuous casting slab is loaded into the furnace. The surface temperature is controlled to be 168°C to 320°C; in the step 2, the heating furnace is heated to 1120°C to 1180°C within 3 hours, and then kept for 50 minutes; in the step 3, a hot tandem rolling mill is used to The iron-chromium-aluminum alloy continuous casting slab is hot-rolled, the process temperature and final rolling temperature of the hot-rolled steel coil are controlled at 720°C to 1185°C, and the thickness of the steel strip after hot-rolling is controlled to be 2.8 mm; in the step 4, The surface temperature of the steel strip is lowered to 275°C to 388°C within 15 seconds, and then coiled into coils.
作为一种具体实施方式，在上述铁铬铝合金连铸板坯热轧钢卷的生产方法中，以牌号为1Cr13Al4的铁铬铝合金连铸板坯为原料，其化学成分按质量百分比为：C：0.008％、Si：0.35％、Mn：0.08％、Al：4.58％、Cr：13.86％、Ti：0.44％、P：0.012％、S：0.001％，其余为Fe及其它不可避免的杂质，所述铁铬铝合金连铸板坯的规格为：厚度200mm，宽度1800mm，其中：在所述步骤1中，铁铬铝合金连铸板坯装炉前的表面温度控制为212℃～485℃；在所述步骤2中，将加热炉在4小时10分钟内加热到1120℃～1200℃，然后保温80分钟；在所述步骤3中，采用炉卷轧机对铁铬铝合金连铸板坯进行热轧，热轧钢卷的过程温度及终轧温度控制在680℃～1190℃，热轧后钢带的厚度控制为3.3mm；在所述步骤4中，在30秒内将钢带表面温度降低到292℃～390℃，然后进行卷取成卷。As a specific embodiment, in the production method of the above-mentioned iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil, the iron-chromium-aluminum alloy continuous casting slab with the grade of 1Cr13Al4 is used as a raw material, and its chemical composition is by mass percentage: C: 0.008%, Si: 0.35%, Mn: 0.08%, Al: 4.58%, Cr: 13.86%, Ti: 0.44%, P: 0.012%, S: 0.001%, the rest are Fe and other inevitable impurities, The specifications of the iron-chromium-aluminum alloy continuous casting slab are: thickness 200mm, width 1800mm, wherein: in the step 1, the surface temperature of the iron-chromium-aluminum alloy continuous casting slab before being loaded into the furnace is controlled to be 212 ℃ ~ 485 ℃ ; In the step 2, the heating furnace is heated to 1120 ° C ~ 1200 ° C within 4 hours and 10 minutes, and then kept for 80 minutes; Carry out hot rolling, the process temperature and final rolling temperature of the hot-rolled steel coil are controlled at 680 ° C to 1190 ° C, and the thickness of the steel strip after hot rolling is controlled to be 3.3 mm; in the step 4, within 30 seconds, the surface of the steel strip is The temperature is lowered to 292°C to 390°C, and then coiling is performed.
利用本发明的铁铬铝合金连铸板坯热轧钢卷的生产方法，通过控制铁铬铝合金连铸板坯的装炉温度、加热炉的加热速度和温度及保温时间、热轧钢卷的过程温度及终轧温度等，可以将钢卷脆韧转变温度降低到小于60℃，从而消除了铁铬铝合金热卷开卷断带的问题。Using the production method of the iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil of the present invention, by controlling the furnace charging temperature of the iron-chromium-aluminum alloy continuous casting slab, the heating speed and temperature of the heating furnace and the holding time, the hot-rolled steel coil The process temperature and final rolling temperature can reduce the brittle-ductile transition temperature of the steel coil to less than 60 °C, thereby eliminating the problem of uncoiling and breaking of the iron-chromium-aluminum alloy hot coil.
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点更加清楚，下面将结合本发明具体实施例对本发明技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.
本发明的铁铬铝合金连铸板坯热轧钢卷的生产方法以牌号为1Cr13Al4、0Cr21Al5、0Cr21Al6、0Cr25Al5和0Cr27Al7Mo2等的铁铬铝合金连铸板坯为原料，该铁铬铝合金连铸板坯的规格为：厚度120～250mm，宽度200～2050mm，并且总体上本发明的铁铬铝合金连铸板坯热轧钢卷的生产方法包括下述步骤：The production method of the iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil of the present invention uses the iron-chromium-aluminum alloy continuous casting slabs with the grades of 1Cr13Al4, 0Cr21Al5, 0Cr21Al6, 0Cr25Al5 and 0Cr27Al7Mo2 as raw materials, and the iron-chromium-aluminum alloy continuous casting The specifications of the slab are: thickness 120-250mm, width 200-2050mm, and generally the production method of the iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil of the present invention comprises the following steps:
步骤1：将铁铬铝合金连铸板坯装入加热炉，其中所述铁铬铝合金连铸板坯装炉前的表面温度控制为大于等于50℃；Step 1: Load the iron-chromium-aluminum alloy continuous casting slab into the heating furnace, wherein the surface temperature of the iron-chromium-aluminum alloy continuous casting slab before being loaded into the furnace is controlled to be greater than or equal to 50°C;
步骤2：将加热炉在0.5小时～6小时内加热到1100℃～1200℃，然后保温30分钟～250分钟；Step 2: heat the heating furnace to 1100℃～1200℃ within 0.5 hour～6 hours, and then keep the temperature for 30 minutes～250 minutes;
步骤3：将铁铬铝合金连铸板坯从加热炉取出进行热轧，热轧钢卷的过程温度及终轧温度控制在600℃～1200℃，热轧后钢带的厚度控制为1.2mm～8.0mm；Step 3: The iron-chromium-aluminum alloy continuous casting slab is taken out from the heating furnace for hot rolling, the process temperature and final rolling temperature of the hot-rolled steel coil are controlled at 600 ° C ~ 1200 ° C, and the thickness of the steel strip after hot rolling is controlled at 1.2mm ~8.0mm;
步骤4：热轧完毕后，喷水冷却钢带，在15秒～30秒内将钢带表面温度降低到200℃～450℃，然后进行卷取成卷。Step 4: After the hot rolling is completed, spray water to cool the steel strip, reduce the surface temperature of the steel strip to 200°C to 450°C within 15 seconds to 30 seconds, and then coil it into coils.
优选地，在上述步骤3中，采用热连轧机或炉卷轧机对铁铬铝合金连铸板坯进行热轧。Preferably, in the above step 3, a hot continuous rolling mill or a furnace coil rolling mill is used to hot-roll the iron-chromium-aluminum alloy continuous casting slab.
利用本发明的铁铬铝合金连铸板坯热轧钢卷的生产方法生产的铁铬铝合金连铸板坯热轧钢卷，经检测其垂直于轧制方向的横向“U”型0℃～90℃冲击值，钢卷脆韧转变温度小于60℃，能够使钢卷在后续工序顺利打开，不会发生断带现象。The iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil produced by the method for producing the iron-chromium-aluminum alloy continuous-casting slab hot-rolled steel coil of the present invention has a transverse "U" shape perpendicular to the rolling direction at 0° C. ～90℃ impact value, the brittle-ductile transition temperature of the steel coil is less than 60℃, which can make the steel coil open smoothly in the subsequent process, and the phenomenon of strip breakage will not occur.
以下结合具体实施例，详细说明本发明的铁铬铝合金连铸板坯热轧钢卷的生产方法。The production method of the iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil of the present invention will be described in detail below with reference to specific embodiments.
实施例1Example 1
以牌号为0Cr21Al6的铁铬铝合金连铸板坯为原料，其化学成分按质量百分比为：C：0.008％、Si：0.21％、Mn：0.10％、Al：5.5％、Cr：19.8％、La：0.07％、Ti：0.11％、Nb：0.09％、P：0.021％、S：0.001％，其余为Fe及其它不可避免的杂质，该铁铬铝合金连铸板坯的规格为：厚度180mm，宽度1080mm。Using the iron-chromium-aluminum alloy continuous casting slab with the grade of 0Cr21Al6 as the raw material, its chemical composition by mass percentage is: C: 0.008%, Si: 0.21%, Mn: 0.10%, Al: 5.5%, Cr: 19.8%, La : 0.07%, Ti: 0.11%, Nb: 0.09%, P: 0.021%, S: 0.001%, the rest are Fe and other inevitable impurities, the specifications of the iron-chromium-aluminum alloy continuous casting slab are: thickness 180mm, Width 1080mm.
实施例1的铁铬铝合金连铸板坯热轧钢卷的生产方法包括如下步骤：The production method of the iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil of embodiment 1 comprises the steps:
(1)将铁铬铝合金连铸板坯装入加热炉，其中铁铬铝合金连铸板坯装炉前的表面温度控制为168℃～320℃；(1) The iron-chromium-aluminum alloy continuous casting slab is loaded into the heating furnace, and the surface temperature of the iron-chromium-aluminum alloy continuous casting slab before the furnace is controlled to be 168 ℃～320 ℃;
(2)将加热炉在3小时内加热到1120℃～1180℃，然后保温50分钟；(2) heating the heating furnace to 1120 ℃～1180 ℃ within 3 hours, and then keeping the temperature for 50 minutes;
(3)将铁铬铝合金连铸板坯从加热炉取出，采用热连轧机进行热轧，热轧钢卷的过程温度及终轧温度控制在720℃～1185℃，热轧后钢带的厚度控制为2.8mm；(3) The iron-chromium-aluminum alloy continuous casting slab is taken out from the heating furnace, and the hot rolling mill is used for hot rolling. The process temperature and final rolling temperature of the hot rolled steel coil are controlled at 720 ° C ~ 1185 ° C. Thickness control is 2.8mm;
(4)热轧完毕后，喷水冷却钢带，在15秒内将钢带表面温度降低到275℃～388℃，然后进行卷取成卷。(4) After the hot rolling is completed, the steel strip is cooled by water spray, and the surface temperature of the steel strip is reduced to 275°C to 388°C within 15 seconds, and then coiled into coils.
检测利用实施例1的铁铬铝合金连铸板坯热轧钢卷的生产方法生产的铁铬铝合金连铸板坯热轧钢卷的垂直于轧制方向的横向“U”型0℃～90℃冲击值，钢卷脆韧转变温度为45℃，能够使钢卷在后续工序顺利打开，不会发生断带现象。Detect the transverse "U" shape perpendicular to the rolling direction of the iron-chromium-aluminum alloy continuous-casting slab hot-rolled steel coil produced by the production method of the iron-chromium-aluminum alloy continuous-casting slab hot-rolled steel coil of Example 1 0 ℃～ The impact value is 90℃, and the brittle-ductile transition temperature of the steel coil is 45℃, which can make the steel coil open smoothly in the subsequent process without breaking the belt.
实施例2Example 2
以牌号为1Cr13Al4的铁铬铝合金连铸板坯为原料，其化学成分按质量百分比为：C：0.008％、Si：0.35％、Mn：0.08％、Al：4.58％、Cr：13.86％、Ti：0.44％、P：0.012％、S：0.001％，其余为Fe及其它不可避免的杂质，该铁铬铝合金连铸板坯的规格为：厚度200mm，宽度1800mm。Using the iron-chromium-aluminum alloy continuous casting slab with the grade of 1Cr13Al4 as the raw material, its chemical composition is: C: 0.008%, Si: 0.35%, Mn: 0.08%, Al: 4.58%, Cr: 13.86%, Ti : 0.44%, P: 0.012%, S: 0.001%, the rest are Fe and other inevitable impurities, the specifications of the iron-chromium-aluminum alloy continuous casting slab are: thickness 200mm, width 1800mm.
实施例2的铁铬铝合金连铸板坯热轧钢卷的生产方法包括如下步骤：The production method of the iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil of embodiment 2 comprises the steps:
(1)将铁铬铝合金连铸板坯装入加热炉，其中铁铬铝合金连铸板坯装炉前的表面温度控制为212℃～485℃；(1) The iron-chromium-aluminum alloy continuous casting slab is loaded into the heating furnace, wherein the surface temperature of the iron-chromium-aluminum alloy continuous casting slab before being loaded into the furnace is controlled to be 212°C to 485°C;
(2)将加热炉在4小时10分钟内加热到1120℃～1200℃，然后保温80分钟；(2) heating the heating furnace to 1120℃～1200℃ within 4 hours and 10 minutes, and then keeping the temperature for 80 minutes;
(3)将铁铬铝合金连铸板坯从加热炉取出，采用炉卷轧机进行热轧，热轧钢卷的过程温度及终轧温度控制在680℃～1190℃，热轧后钢带的厚度控制为3.3mm；(3) The iron-chromium-aluminum alloy continuous casting slab is taken out from the heating furnace, and the hot rolling mill is used for hot rolling. Thickness control is 3.3mm;
(4)热轧完毕后，喷水冷却钢带，在30秒内将钢带表面温度降低到292℃～390℃，然后进行卷取成卷。(4) After the hot rolling is completed, the steel strip is cooled by water spray, and the surface temperature of the steel strip is lowered to 292°C to 390°C within 30 seconds, and then coiled into coils.
检测利用实施例2的铁铬铝合金连铸板坯热轧钢卷的生产方法生产的铁铬铝合金连铸板坯热轧钢卷的垂直于轧制方向的横向“U”型0℃～90℃冲击值，钢卷脆韧转变温度为35℃，能够使钢卷在后续工序顺利打开，不会发生断带现象。Detect the transverse "U" shape perpendicular to the rolling direction of the iron-chromium-aluminum alloy continuous-casting slab hot-rolled steel coil produced by the production method of the iron-chromium-aluminum alloy continuous-casting slab hot-rolled steel coil of Example 2 0 ℃～ The impact value is 90℃, and the brittle-ductile transition temperature of the steel coil is 35℃, which can make the steel coil open smoothly in the subsequent process without breaking the belt.
需要说明的是，以上实施例仅用于说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明的范围。It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be used for The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the present invention.
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