WO2022253216A1 - 一种拉深性能良好的热轧酸洗搪瓷钢及其生产方法 - Google Patents
一种拉深性能良好的热轧酸洗搪瓷钢及其生产方法 Download PDFInfo
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- WO2022253216A1 WO2022253216A1 PCT/CN2022/096198 CN2022096198W WO2022253216A1 WO 2022253216 A1 WO2022253216 A1 WO 2022253216A1 CN 2022096198 W CN2022096198 W CN 2022096198W WO 2022253216 A1 WO2022253216 A1 WO 2022253216A1
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- hot
- rolled
- steel
- drawing performance
- pickling
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 95
- 239000010959 steel Substances 0.000 title claims abstract description 95
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 41
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 31
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 18
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000005096 rolling process Methods 0.000 claims description 59
- 210000003298 dental enamel Anatomy 0.000 claims description 37
- 238000005554 pickling Methods 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 17
- 238000010583 slow cooling Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 11
- 239000000839 emulsion Substances 0.000 claims description 7
- 230000001050 lubricating effect Effects 0.000 claims description 7
- 229910001568 polygonal ferrite Inorganic materials 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 4
- 238000007670 refining Methods 0.000 claims description 4
- 238000009749 continuous casting Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 241000251468 Actinopterygii Species 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 description 25
- 239000006104 solid solution Substances 0.000 description 11
- 238000004880 explosion Methods 0.000 description 8
- 238000005728 strengthening Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 125000004429 atom Chemical group 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000001186 cumulative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 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
- 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
-
- 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
-
- 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0405—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing of ferrous alloys
-
- 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0426—Hot rolling
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
-
- 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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- Y02P10/20—Recycling
Definitions
- the invention belongs to the technical field of enamel steel production, and in particular relates to a hot-rolled pickling enamel steel with good drawing performance and a production method thereof.
- Enamel is a composite material in which inorganic vitreous materials are condensed on the base metal by melting and firmly combined with the metal.
- Enamel products not only have the inherent strength, toughness and machinability of metal materials, but also have the characteristics of corrosion resistance, aging resistance, wear resistance, high temperature resistance, non-toxicity and decorative properties of ceramic materials. advantage.
- Enamel products with steel plates as metal substrates play a very important role in the national economy and are widely used in light industry, household appliances, metallurgy, chemical industry, construction and other industries.
- water heater inner tanks are generally produced by rolling and welding, and the production efficiency and yield are low.
- the water heater industry has gradually begun to use the deep drawing process to produce water heater inner tanks, and it is necessary to improve the tensile properties of enamelled steel products.
- the drawing performance of hot-rolled enamel steel is mainly related to the following performance indicators:
- Plastic strain ratio r value A high plastic strain ratio r value is beneficial to deep drawing.
- n value A large n value of the plate indicates that the material has good distribution uniformity in plastic deformation, and it is not easy to produce concentrated deformation, and it is relatively difficult to produce plastic fracture.
- a high elongation is beneficial to the unidirectional deep drawing deformation of the part. Generally speaking, a high elongation is an important guarantee for the smooth forming of the part.
- Chinese patent CN201310547968.1 discloses "Hot-rolled thin plate enamelled steel with a yield strength of 245MPa and its manufacturing method".
- the thickness of the prepared enamelled steel is 1.0-2.5mm, and the chemical composition is C: 0.001-0.010%, Si ⁇ 0.05%, Mn: 0.10-0.50%, P ⁇ 0.020%, S ⁇ 0.010%, Ti: 0.04-0.10%, Als: 0.02-0.08%, N ⁇ 0.008%.
- the rolling temperature is 1100-1150°C
- the final rolling temperature is 860-930°C
- the coiling temperature is 600-700°C.
- the yield strength of the product is 245-330MPa
- the tensile strength is ⁇ 300MPa
- the elongation is 37-42%.
- the manufacturing process is as follows: the heating temperature is 1200-1250°C, the final rolling temperature is 860-930°C, and the coiling temperature is 650-700°C.
- the yield strength of the product is 330-450MPa, the tensile strength is ⁇ 400MPa, and the elongation is 38-41%.
- Chinese patent CN201510280022.2 discloses "a method of manufacturing enamelled steel with excellent scale explosion resistance and its steel plate".
- the chemical composition of the steel is: C: 0.04-0.10%, Si ⁇ 0.10%, Mn : 0.30-1.0%, Ti: 0.03-0.10%, P ⁇ 0.015%, S: 0.010-0.045%, N: 0.003-0.009%, Als: 0.005-0.050%, Cr: 0.05-0.25%, and Ti/C : 0.5 ⁇ 1.2.
- the heating temperature of the continuous casting slab is 1180-1250°C
- the finish rolling start temperature is 980-1100°C
- the final rolling temperature is 880-950°C.
- the front-stage cooling method is adopted, and the cooling rate is ⁇ 30°C/s within 6s. Cooled to 630-700°C for coiling, the yield strength of the product is 390-500MPa, the tensile strength is 476-598MPa, and the elongation is 26-38%.
- Chinese patent 201810663362.7 discloses "a low-cost high-oxygen enameled steel produced by CSP process and its manufacturing method", and its chemical composition weight percentage is: C ⁇ 0.01%, Mn: 0.10-1.00%, O ⁇ 0.0500%, Si ⁇ 0.01%, P ⁇ 0.020%, S ⁇ 0.030%, Als ⁇ 0.01%, and the rest are Fe and unavoidable impurities.
- This patent increases the oxygen content in the steel to form a large number of oxide inclusions, which serve as hydrogen storage traps and improve the scale explosion resistance of the steel plate.
- the furnace temperature is 1160-1200°C
- the final rolling temperature is 860-900°C
- the coiling temperature is 600-640°C
- the yield strength is 151-214MPa
- the tensile strength is 256-282MPa
- the elongation is 35.2 ⁇ 45.4%.
- Chinese patent CN201910697103.0 discloses "a 260MPa grade hot-rolled pickling enamel steel and its production method", and its chemical composition weight percentage is: C: 0.030-0.060%, Si ⁇ 0.030%, Mn: 0.30-0.60% , P ⁇ 0.020%, S ⁇ 0.010%, Als ⁇ 0.060%, B: 0.0015-0.0040%, N: 0.0040-0.0100%.
- the manufacturing method is as follows: the heating temperature of the steel plate before rolling is controlled at 1132-1212°C, the final rolling temperature is controlled at 881-890°C, the coiling temperature is controlled at 687-696°C, and the concentration of free acid in the pickling solution is 105-119g/L , The temperature of the acid solution is 71.4-74°C.
- the yield strength of the product is ⁇ 260MPa, the tensile strength is ⁇ 360MPa, and the elongation is 33-34%.
- Chinese patent CN202010986947.X discloses "Hot-rolled enamelled steel for deep drawing and its manufacturing method", its composition mass percentage is: C ⁇ 0.01%, Si ⁇ 0.05%, Mn 0.10-0.80%, P ⁇ 0.030%, S ⁇ 0.015%, Ti 0.01-0.08%, Al 0.01-0.07%, N ⁇ 0.010%, 4 ⁇ Ti/N ⁇ 10, Ca 0.0010-0.0040%, Ca/S ⁇ 1.25.
- the manufacturing method is as follows: the heating temperature is 1150-1190°C, the final rolling temperature is 800-900°C, the coiling temperature is 710-760°C, the cumulative deformation rate of hot rolling and rough rolling is controlled above 70%, and the cumulative deformation rate of finishing rolling is controlled Above 70%.
- the leveling pressure is 700-900 tons, and the leveling elongation of the leveling is 7-12%.
- the yield strength of the product is 359-402MPa, the tensile strength is 447-483MPa, and the elongation is 30-41%.
- Chinese patent CN202010986956.9 discloses "an enamelled steel and its preparation method and application", and its composition mass percentage is: C: 0.01-0.14%, Si ⁇ 0.10%, Mn: 0.20-1.6%, P ⁇ 0.040%, S ⁇ 0.040%, Ti: 0.01-0.12%, Al: 0.01-0.07%, N ⁇ 0.010%, Mn/S ⁇ 30.
- the heating temperature is 1200-1350°C
- the finish rolling temperature is 810-980°C
- the coiling temperature is 500-700°C
- the cumulative deformation rate of hot-rolled rough rolling is controlled above 70%
- the hot-rolled finish rolling The accumulative deformation rate is controlled above 70%
- the leveling pressure is 450-650 tons
- the leveling elongation rate is ⁇ 6%.
- the hardness of shot blasting is 40 ⁇ 52HRC
- the concentration of pickling solution is 5 ⁇ 20%.
- the yield strength of the product is ⁇ 410
- the tensile strength is 490MPa
- the elongation is 25-43.5%.
- the existing disclosed enamel steel has high yield strength, low elongation, poor drawing performance, and quality problems such as napping and cracking are prone to occur in the drawing forming process. Therefore, it is necessary to develop thermal steel with good drawing performance.
- Rolled enamel steel is of great significance to promote the upgrading of the water heater liner manufacturing industry and the green transformation of the home appliance industry.
- the object of the present invention is to provide a hot-rolled pickled enamel steel with good drawing performance and its production method.
- the yield strength of the hot-rolled pickled enamel steel is 210-245MPa, the tensile strength is ⁇ 320MPa, and the elongation is ⁇ 46%.
- n value ⁇ 0.3, r value ⁇ 1.3, TH value ⁇ 7.0 has good formability, especially has good deep drawing performance, and also has high strength and anti-scale explosion performance, which meets the production of water heater inner tank Require.
- a hot-rolled pickling enamel steel with good deep-drawing performance its chemical composition weight percentage is: C: 0.001-0.006%, N ⁇ 0.004%, S ⁇ 0.0080%, Als: 0.015-0.040%, when it is strengthened with Mn, Mn: 1.0 ⁇ 1.5%, Si: 0.001 ⁇ 0.03%, P ⁇ 0.015%; when Si is strengthened, Si: 0.4 ⁇ 0.6%, Mn: 0.15 ⁇ 0.3%, P ⁇ 0.015%; when P is strengthened, Si: 0.001 ⁇ 0.03%, Mn: 0.15 ⁇ 0.3%, P: 0.035 ⁇ 0.055%; also includes Ti, and 4[C]+3.42[N]+3[S] ⁇ [Ti] ⁇ 0.065%, the rest is Fe and other unavoidable impurities.
- the content of Ti is 0.025-0.065%.
- Mn when Mn is used for strengthening, Mn: 1.0-1.5%, Si: 0.005-0.025%, P ⁇ 0.015%.
- Si 0.003-0.006%
- Mn 0.15-0.3%
- P 0.035-0.055%
- the microstructure of the hot-rolled pickling enamelled steel in the present invention is polygonal ferrite grains uniformly having a ⁇ 111 ⁇ plane texture, and the grain size does not exceed grade 7.
- the yield strength of the hot-rolled pickling enamel steel in the present invention is 210-245MPa, the tensile strength is ⁇ 320MPa, the elongation is ⁇ 46%, the r value is ⁇ 1.3, the n value is ⁇ 0.3, and the TH value is ⁇ 7.0.
- the yield strength of the hot-rolled pickling enamel steel of the present invention is 210-245MPa
- the tensile strength is 320-450MPa
- the elongation is 46-52%
- the r value is 1.3-1.8
- the n value is 0.3 ⁇ 0.4
- TH value is 7.0 ⁇ 8.5.
- the present invention provides a water heater inner tank
- the steel part of the water heater inner tank is the hot-rolled pickled enamelled steel with good drawing performance described in any embodiment of the present invention.
- the inner tank of the water heater of the present invention is produced from the hot-rolled pickled enamelled steel with good drawing performance described in any embodiment of the present invention through deep drawing.
- composition design of the hot-rolled pickling enamelled steel of the present invention is the composition design of the hot-rolled pickling enamelled steel of the present invention:
- Solid solution C will increase the yield strength and tensile strength of steel, but the plasticity will decrease, and solid solution C is not conducive to the formation of ⁇ 111 ⁇ texture, reducing the r value of the product.
- Materials with a higher limit drawing ratio require low yield strength, high elongation, and high ⁇ 111 ⁇ texture strength. Therefore, the smaller the solid solution C, the better, but the lower the C content, the lower the refining cost required for the C content The higher the value, the longer the refining time.
- the C content in the steel of the present invention is controlled at 0.001-0.006%.
- N It is a strong solid-solution strengthening element, which is not conducive to the formation of ⁇ 111 ⁇ texture, and will cause aging to affect the stamping quality of the steel plate, but the low N content will increase the production cost.
- the N content in the steel of the present invention is controlled Below 0.004%. In some embodiments, the N content is 0.002-0.004%.
- S It is a harmful impurity element in steel. S in steel is easy to form segregation in steel, which reduces the toughness and welding performance of steel. S is easy to form plastic sulfide, which causes delamination of steel plate and deteriorates the performance of steel plate. Therefore, the lower the S content The better, considering comprehensively, the S content in the steel of the present invention is controlled below 0.008%.
- Als is a strong deoxidizer, which can reduce oxide inclusions in steel and make the steel pure. However, if the Al content is too high, it will easily produce grain refinement and increase the yield strength and yield ratio. Considering comprehensively, the steel of the present invention Als control is 0.015-0.040%.
- Ti has a strong affinity with C and N in the steel. By forming TiC and TiN to fix C and N interstitial atoms, reducing the content of C and N in solid solution in the steel is beneficial to promote the formation of ⁇ 111 ⁇ texture, Increase the r value. In addition, since the binding capacity of Ti and S is greater than that of Ti and C, in order to ensure that Ti can remove solid-dissolved C atoms, according to the mass percentage of TiC, TiN and Ti 4 C 2 S 2 , it should be ensured that 4 [C]+3.42[N]+3[S] ⁇ [Ti] ⁇ 0.065%. The formed TiC, TiN and Ti 4 C 2 S 2 can be used as traps for hydrogen storage and improve the scale explosion resistance of the steel plate.
- Si, Mn, P Solid solution in ferrite and austenite can increase the strength, but at the same time it will reduce the plasticity.
- Mn is used for strengthening
- the Mn content is controlled at 1.0-1.5%, and Si ⁇ 0.03%, such as 0.005-0.025%, P ⁇ 0.015%, such as 0.005-0.013%
- Si is controlled at 0.4-0.6%
- the Mn content is controlled at 0.15-0.3%, P ⁇ 0.015%, such as, Such as 0.005-0.015%
- P content is controlled at 0.035-0.055%, Si ⁇ 0.03%, such as ⁇ 0.01%
- the Mn content is controlled at 0.15-0.3%.
- the invention adopts ultra-low C and microalloying (addition of Ti) to realize no solid-solution C and N interstitial atoms in ferrite, lubricated rolling and high-temperature coiling under low temperature and high pressure, and obtains coarse, uniform size and ⁇ 111 ⁇ Ferrite grains with surface texture can improve the deep-drawing performance of the product, and further, the tensile strength and elongation of the product can be improved through solid solution strengthening of Si, Mn and P.
- control the composition ratio of Ti, C, N, and S to form coarse ferrite grains (TiC, TiN, and Ti 4 C 2 S 2 ), which serve as traps for hydrogen storage, improve the scale explosion resistance of the steel plate, and realize the product
- the yield strength is 210-245MPa
- the tensile strength is ⁇ 320MPa
- the elongation is ⁇ 46%
- the n value is ⁇ 0.3
- the r value is ⁇ 1.3
- the TH value is ⁇ 7.0.
- the product has good formability, especially good deep drawing Formability, at the same time, has high tensile strength and anti-scale explosion performance.
- the production method of the hot-rolled pickling enamelled steel with good drawing performance of the present invention comprises the following steps:
- the final rolling temperature is 750-800°C, the total reduction ratio of the rolling temperature ⁇ 840°C is ⁇ 60%, and the rolling temperature ⁇ 840°C is put into the lubricating emulsion during the rolling process, and the oil-water ratio of the lubricating emulsion is 1-5% ;
- the coiling temperature is 720 ⁇ 780°C
- the finish rolling temperature is 750-780°C.
- the coiling temperature is 730-760°C.
- the slow cooling is the slow cooling of the stack or the slow cooling of the insulation cover, and hot coils are stacked around the stack during the slow cooling.
- the total reduction rate at the rolling temperature ⁇ 840°C is 60-85%.
- the cooling rate in step 3) is 1-6°C/s.
- Controlling the final rolling temperature at 750-800°C during the rolling process can promote the formation of ⁇ 111 ⁇ texture, increase the r value of the product, and coarsen the ferrite grains; if the final rolling temperature is higher than 800°C, the ferrite The grain becomes finer, the ⁇ 111 ⁇ texture decreases, the product strength increases, and the elongation, n value, and r value will all decrease. If the final rolling temperature is lower than 750°C, it will not be possible to ensure that the coiling temperature is ⁇ 720°C, and the deformed ferrite Sufficient recovery cannot be achieved, but the formability of the product will be deteriorated.
- the rolling process of the present invention adopts low-temperature lubricated rolling, ferrite rolling occurs on the steel plate below 840°C, and the rolling temperature is controlled in the ferrite phase region to control the total reduction rate to ⁇ 60%, which promotes the formation of ⁇ 111 ⁇ texture , Obtain ferrite grains with ⁇ 111 ⁇ surface texture, and improve the r value of the product.
- the purpose of lubricated rolling during rolling temperature ⁇ 840°C during ferrite rolling is to obtain a uniform ⁇ 111 ⁇ texture in the thickness direction, avoid the formation of ⁇ 110 ⁇ texture on the surface, and improve the r value of the product.
- control the oil-water ratio of the milk lubricant emulsion to 1-5%.
- the oil used in the lubricating emulsion of the present invention may be the oil conventionally used in rolling in the art.
- the cooling rate should be controlled to be ⁇ 6°C/s.
- the coiling adopts high-temperature coiling, and the coiling temperature is controlled at 720-780 ° C. Combined with the slow cooling of the steel coil, the ferrite extending along the rolling direction at the end of rolling can be fully recovered to form a coarse and uniform ferrite. grains to obtain the desired performance. If the coiling temperature is lower than 720°C, the deformed ferrite cannot be fully recovered, which will deteriorate the formability of the product. Under the conditions of the existing process equipment, the temperature will decrease during the cooling process. Under the set final rolling temperature, 780°C is the highest temperature that the ferrite can fully recover and the coarse and uniform ferrite grains can be achieved. If the temperature is higher than 780°C, on the one hand, it will not have a significant impact on performance, and on the other hand, it will be more difficult to implement.
- the present invention provides a method for manufacturing a water heater liner, the method includes the step of manufacturing the hot-rolled pickled enamelled steel with good drawing performance by using the method described in any embodiment of the present invention , and the step of deep-drawing the hot-rolled pickling enamel steel with good drawing performance to form the inner tank of the water heater.
- the deep drawing method known in the art can be used to prepare the water heater liner of the present invention.
- the composition design of the present invention adopts ultra-low carbon, Ti micro-alloy chemical composition design, and further through Si, Mn, P solid solution strengthening, realizes that there are no solid solution C and N interstitial atoms in the ferrite, so that the hot-rolled pickling enamelled steel
- the microstructure obtains coarse, uniform size and polygonal ferrite grains with ⁇ 111 ⁇ surface texture, which improves the deep-drawing performance of the product.
- irreversible hydrogen storage traps such as TiC, TiN, and Ti 4 C 2 S 2 are formed to reduce the dissolved hydrogen in the matrix, reduce the risk of scale explosion, and improve the scale resistance of the steel plate.
- the hot-rolled pickled enamelled steel products have good forming properties, especially good drawing and forming properties, and also have high tensile strength and good anti-scale cracking properties.
- the rolling temperature is controlled in the range of ferrite phase region to have a total reduction rate greater than 60%, combined with lubricated rolling, to obtain iron with ⁇ 111 ⁇ surface texture Ferrite grains, followed by slow cooling and high-temperature coiling to fully recover the ferrite and form coarse and uniform polygonal ferrite grains, so that the yield strength of hot-rolled pickling enamel steel is 210-245MPa, and the tensile strength ⁇ 320MPa, elongation ⁇ 46%, n ⁇ 0.3, r ⁇ 1.3, the product not only has good deep drawing performance, but also has high tensile strength, in addition, TH value ⁇ 7.0, has good scale resistance Explosive performance.
- Lubricated rolling is adopted in the low-temperature ferrite rolling process of the present invention, and the oil-water ratio of the lubricating emulsion is controlled at 1 to 5%, so as to avoid the formation of shear texture that is not conducive to forming, and the ferrite phase accumulates at a certain reduction rate, forming
- the ⁇ 111 ⁇ surface texture which is conducive to stamping, combined with subsequent slow cooling and high-temperature coiling, forms coarse and uniform ferrite grains, thereby obtaining the required mechanical properties.
- the hot-rolled pickled enamelled steel obtained by the present invention has better drawing performance, and can be used in the production of water heater liners by drawing and forming, replacing the rolling and welding forming methods with low production efficiency and low yield, and has a great impact on promoting water heaters.
- the upgrading of the liner manufacturing industry and the green transformation of the home appliance industry are of great significance.
- the yield strength, tensile strength, n value, and r value are tested on a tensile testing machine with reference to the standard EN10002.
- the hydrogen permeation test method is used to detect the explosive sensitive TH value of the enamel scale with reference to the standard EN10209.
- the microstructure of the hot-rolled pickling enamel steel obtained by the present invention is coarse, uniform in size and polygonal ferrite grains with ⁇ 111 ⁇ plane texture, with a tensile strength of 210 to 245 MPa, a tensile strength of ⁇ 320 MPa, and an elongation of ⁇ 46%.
- n value ⁇ 0.3, r value ⁇ 1.3, TH value ⁇ 7.0 has good formability, especially has good deep drawing performance, also has high tensile strength and good anti-scale explosion performance, can be used in The production of water heater inner tank by deep drawing can replace the rolling and welding forming methods with low production efficiency and low yield rate, which is of great significance to promote the upgrading of the water heater inner tank manufacturing industry and the green transformation of the home appliance industry.
- Example 1 0.0011 0.025 1.02 0.039 0.011 0.006 0.0034 0.040
- Example 2 0.0010 0.008 1.31 0.034 0.013 0.004 0.0030 0.030
- Example 3 0.0059 0.010 1.47 0.030 0.012 0.007 0.0029 0.055
- Example 4 0.0029 0.456 0.28 0.040 0.014 0.007 0.0036 0.045
- Example 5 0.0015 0.584 0.16 0.028 0.010 0.001 0.0039 0.029
- Example 6 0.0032 0.418 0.19 0.027 0.009 0.005 0.0025 0.045
- Example 7 0.0036 0.003 0.30 0.035 0.039 0.007 0.0040 0.065
- Example 8 0.0040 0.006 0.17 0.020 0.055 0.008 0.0036 0.059
- Example 9 0.0039 0.005 0.24 0.016 0.043 0.002 0.0039 0.040
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- Chemical & Material Sciences (AREA)
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- Physics & Mathematics (AREA)
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Abstract
Description
C | Si | Mn | Als | P | S | N | Ti | |
实施例1 | 0.0011 | 0.025 | 1.02 | 0.039 | 0.011 | 0.006 | 0.0034 | 0.040 |
实施例2 | 0.0010 | 0.008 | 1.31 | 0.034 | 0.013 | 0.004 | 0.0030 | 0.030 |
实施例3 | 0.0059 | 0.010 | 1.47 | 0.030 | 0.012 | 0.007 | 0.0029 | 0.055 |
实施例4 | 0.0029 | 0.456 | 0.28 | 0.040 | 0.014 | 0.007 | 0.0036 | 0.045 |
实施例5 | 0.0015 | 0.584 | 0.16 | 0.028 | 0.010 | 0.001 | 0.0039 | 0.029 |
实施例6 | 0.0032 | 0.418 | 0.19 | 0.027 | 0.009 | 0.005 | 0.0025 | 0.045 |
实施例7 | 0.0036 | 0.003 | 0.30 | 0.035 | 0.039 | 0.007 | 0.0040 | 0.065 |
实施例8 | 0.0040 | 0.006 | 0.17 | 0.020 | 0.055 | 0.008 | 0.0036 | 0.059 |
实施例9 | 0.0039 | 0.005 | 0.24 | 0.016 | 0.043 | 0.002 | 0.0039 | 0.040 |
Claims (15)
- 一种拉深性能良好的热轧酸洗搪瓷钢,其化学成分为C、N、S、Al、Mn、Si、P、Ti和余量的Fe和不可避免的杂质;其中,C、N、S、Al、和Ti的重量百分比为:C:0.001~0.006%,N≤0.004%,S≤0.0080%,Als:0.015~0.040%,4[C]+3.42[N]+3[S]≤[Ti]≤0.065%;Si、Mn和P的重量百分比满足:Mn:1.0~1.5%、Si:0.001~0.03%和P≤0.015%,或Si:0.4~0.6%、Mn:0.15~0.3%和P≤0.015%,或Si:0.001~0.03%、Mn:0.15~0.3%和P:0.035~0.055%。
- 如权利要求1所述的拉深性能良好的热轧酸洗搪瓷钢,其特征是,Ti的含量为0.025~0.065%。
- 如权利要求1所述的拉深性能良好的热轧酸洗搪瓷钢,其特征是,Si、Mn和P的重量百分比满足:Mn:1.0~1.5%,Si:0.005~0.025%,P≤0.015%。
- 如权利要求1所述的拉深性能良好的热轧酸洗搪瓷钢,其特征是,Si、Mn和P的重量百分比满足:Si:0.003~0.006%,Mn:0.15~0.3%,P:0.035~0.055%。
- 如权利要求1所述的拉深性能良好的热轧酸洗搪瓷钢,其特征是,所述热轧酸洗搪瓷钢的显微组织为均匀的具有{111}面织构的多边形铁素体晶粒,且晶粒度不超过7级。
- 如权利要求1-5中任一项所述的拉深性能良好的热轧酸洗搪瓷钢,其特征是,所述热轧酸洗搪瓷钢的屈服强度为210~245MPa,抗拉强度为≥320MPa,延伸率≥46%,r值≥1.3,n值≥0.3,TH值≥7.0。
- 如权利要求6所述的拉深性能良好的热轧酸洗搪瓷钢,其特征是,所述热轧酸洗搪瓷钢的屈服强度为210~245MPa,抗拉强度为320~450MPa,延伸率为46~52%,r值为1.3~1.8,n值为0.3~0.4,TH值为7.0~8.5。
- 如权利要求1-7中任一项所述的拉深性能良好的热轧酸洗搪瓷钢的生产方法,其特征在于,包括如下步骤:1)冶炼、铸造按权利要求1-4中任一项所述的成分冶炼、精炼、连铸成坯;2)轧制终轧温度为750~800℃,轧制温度≤840℃的总压下率≥60%,且轧制温度≤840℃轧制过程中投入润滑乳液,所述润滑乳液油水比为1~5%;3)冷却冷却速度≤6℃/s;4)卷取卷取温度为720~780℃;5)缓冷钢板卷取后进行缓冷;6)酸洗缓冷后酸洗,去除钢板表面氧化皮。
- 如权利要求8所述的拉深性能良好的热轧酸洗搪瓷钢的生产方法,其特征是,步骤2)中,所述终轧温度为750~780℃。
- 如权利要求8所述的拉深性能良好的热轧酸洗搪瓷钢的生产方法,其特征是,步骤4)中,所述卷取温度为730~760℃。
- 如权利要求8所述的拉深性能良好的热轧酸洗搪瓷钢的生产方法,其特征是,步骤5)中,所述缓冷为堆垛缓冷或保温罩缓冷,所述堆垛缓冷时周围堆放热卷。
- 如权利要求8所述的拉深性能良好的热轧酸洗搪瓷钢的生产方法,其特征是,步骤2)的轧制中,轧制温度≤840℃的总压下率为60~85%。
- 如权利要求8所述的拉深性能良好的热轧酸洗搪瓷钢的生产方法,其特征是,步骤3)的冷却速度为1~6℃/s。
- 一种热水器内胆,其由权利要求1-7中任一项所述的拉深性能良好的热轧酸洗搪瓷钢经由拉深成形方式生产得到。
- 一种热水器内胆的制造方法,其特征是,该方法包括采用权利要求8-13中任一项所述的方法制造得到所述的拉深性能良好的热轧酸洗搪瓷钢的步骤,以及将所述的拉深性能良好的热轧酸洗搪瓷钢拉深成形,形成所述热水器内胆的步骤。
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CN101535517A (zh) * | 2006-09-27 | 2009-09-16 | 新日本制铁株式会社 | 耐鳞爆性显著优良的搪瓷用钢板及其制造方法 |
CN102251174A (zh) * | 2010-05-19 | 2011-11-23 | 宝山钢铁股份有限公司 | 一种搪瓷钢及其冷轧板的制造方法 |
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DE60206647T2 (de) * | 2001-10-29 | 2006-07-06 | Nippon Steel Corp. | Stahlblech zur glasemaillierung mit hervorragender bearbeitbarkeit und fischschuppenbeständigkeit und herstellungsverfahren dafür |
CN112063932B (zh) * | 2020-09-18 | 2022-03-22 | 山西太钢不锈钢股份有限公司 | 深冲用热轧搪瓷钢及其制造方法 |
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DE2410826A1 (de) * | 1973-03-09 | 1974-09-19 | Nippon Steel Corp | Verfahren zum herstellen emaillierfaehigen stahlblechs |
JPH03126814A (ja) * | 1989-10-09 | 1991-05-30 | Sumitomo Metal Ind Ltd | 高張力ほうろう用鋼板の製造方法 |
JPH10140286A (ja) * | 1996-11-05 | 1998-05-26 | Nkk Corp | 密着性に優れたほうろう用鋼板 |
DE10349364B3 (de) * | 2003-10-16 | 2005-03-03 | Salzgitter Flachstahl Gmbh | Beidseitig emaillierbares warmgewalztes Band oder Blech aus Stahl, insbesondere IF-Stahl |
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CN101535517A (zh) * | 2006-09-27 | 2009-09-16 | 新日本制铁株式会社 | 耐鳞爆性显著优良的搪瓷用钢板及其制造方法 |
CN102251174A (zh) * | 2010-05-19 | 2011-11-23 | 宝山钢铁股份有限公司 | 一种搪瓷钢及其冷轧板的制造方法 |
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