CN117089762A - Ultra-deep drawing cold-rolled enamel steel for oven with grain line defect resistance and production method thereof - Google Patents
Ultra-deep drawing cold-rolled enamel steel for oven with grain line defect resistance and production method thereof Download PDFInfo
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- CN117089762A CN117089762A CN202310771232.6A CN202310771232A CN117089762A CN 117089762 A CN117089762 A CN 117089762A CN 202310771232 A CN202310771232 A CN 202310771232A CN 117089762 A CN117089762 A CN 117089762A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 45
- 239000010959 steel Substances 0.000 title claims abstract description 45
- 210000003298 dental enamel Anatomy 0.000 title claims abstract description 40
- 230000007547 defect Effects 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000000137 annealing Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 9
- 239000001257 hydrogen Substances 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 238000005097 cold rolling Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 238000010583 slow cooling Methods 0.000 claims description 4
- 206010040925 Skin striae Diseases 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 3
- 230000002427 irreversible effect Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000005098 hot rolling Methods 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 229910001567 cementite Inorganic materials 0.000 description 4
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004534 enameling Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- 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
- 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
- C21D1/26—Methods of annealing
-
- 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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- 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
- C22C38/04—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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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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 Sheet Steel (AREA)
Abstract
The invention discloses ultra-deep drawing cold-rolled enamel steel for an oven for resisting grain line defects and a production method thereof, which form a key technology for producing the ultra-deep drawing enamel steel for the oven on a continuous annealing unit, improve the capability of resisting grain line defects by controlling the aluminum content, and improve the anti-scaling performance by adopting micro holes or micro cracks as irreversible hydrogen storage traps. The technology fully utilizes the characteristics of a continuous annealing unit, selects proper annealing treatment process parameters, and withdrawsThe fire temperature and the aging temperature are lower, and the method has the advantage of low cost. The produced product has good surface quality, excellent stamping forming performance and anti-scaling performance, and practical quality improvement and synergy. The ultra-deep drawing cold-rolled enamel steel for the oven can effectively resist line defects, and effectively eliminate the batch occurrence of Al on the enamel surface during the production of oven liner parts 2 O 3 The line defects caused by enrichment improve the production efficiency, reduce the defect rate, and have remarkable social and economic benefits and broad market prospect.
Description
Technical Field
The invention belongs to the technical field of cold-rolled sheet strip production, and particularly relates to ultra-deep drawing cold-rolled enamel steel for an oven with grain line defect resistance and a production method thereof.
Background
The enamel product is a composite material prepared by adopting a melting and sintering method to coat and fuse electrodeless oxide coating (enamel) on the surface of an enamel steel substrate, and has the characteristics of wear resistance, corrosion resistance, high temperature resistance, easy washing, no toxicity, sanitation, cleanness and the like, thus being widely used for manufacturing household utensils, sanitary ware, oven liners, water heater liners, chemical reaction tanks, building decorative panels and the like. The enamelled steel sheet needs to meet the machining performance required by enamel products, has good adhesion with enamel, and has no defects such as scale explosion, pinholes, bubbles and the like. The application surface of the enamel products is continuously expanded at present, the quality requirement on enamel steel is more and more strict, and along with the wide popularization of application and the increase of the use amount, the line defects (shown in figure 3) of batch oven parts affect the beauty of the oven liner and the quality of enamel, and cause great trouble to the production of ovens.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention adopts a modern continuous annealing furnace to obtain the cold-rolled enamelled steel sheet with good anti-scaling performance, good mechanical property and stamping forming performance, good grain line defect resistance and good quality improvement and efficiency enhancement capability and market potential after being treated by a proper annealing process.
In order to achieve the aim of the invention, the invention provides ultra-deep drawing cold-rolled enamel steel for an oven with the grain line defect resistance, which comprises the following chemical components in percentage by mass: 0.03 to 0.08 percent of C, less than or equal to 0.05 percent of Si, 0.10 to 0.60 percent of Mn, less than or equal to 0.050 percent of P, less than or equal to 0.025 percent of S, less than or equal to 0.025 percent of Als, less than or equal to 0.01 percent of N, 0.05 to 0.15 percent of Ti, and the balance of Fe and unavoidable impurities.
The reason for selecting the chemical composition and the range of the cold rolled substrate is as follows, carbon C: the carbon content of important elements affecting the performance of the steel plate is reduced, the elongation of the steel plate is improved, and the n value and the r value are also improved. Nitrogen N and sulfur S: in the traditional ultra-low carbon steel, the alloy belongs to impurity elements, which affects the forming performance of the steel plate, but in the enamel steel, the proper improvement of the content of sulfur and nitrogen is favorable for matching with other alloy elements in the steel, forming second-phase particles and improving the hydrogen storage performance. Titanium Ti: titanium is a strong carbon, nitrogen and sulfide forming element, and an excess of titanium is added to fix interstitial atoms such as carbon, nitrogen and sulfur in the steel. Aluminum Als: aluminum is a side effect in enamel steel, and excessive aluminum content is easy to exist Al 2 O 3 The enrichment phenomenon of the inner container part of the oven causes the line defect (shown in figure 3) to appear during the enamel process. Thus, reducing the aluminium content can increase the resistance of the enamelled steel to grain defects. The rolling reduction rate of 70-80% is adopted in cold rolling, the large rolling reduction rate is beneficial to improving the r value of the annealed strip steel, coarse cementite is obtained by hot rolling and high-temperature coiling, the cementite is crushed in cold rolling deformation, and the formed micro holes or micro cracks are used as irreversible hydrogen storage traps, so that the anti-scaling performance is improved.
An ultra-deep drawing cold-rolled enamel steel for an oven with the line defect resistance, wherein the ultra-deep drawing cold-rolled enamel steel for the oven has the following properties: yield strength of 120-160 MPa, tensile strengthThe strength is 290-330 MPa, n 90 ≥0.20，r 90 ≥2.7，A 80 More than or equal to 43.0 percent; TH value of hydrogen permeation test is 15-17 min/mm 2 。
The production method of the ultra-deep drawing cold-rolled enamel steel for the high-grain-defect-resistant oven comprises the following steps of: cold rolling a substrate, cleaning, continuous annealing, leveling, trimming, surface quality inspection, oiling, coiling and finished product forming.
Further, the method adopts a continuous annealing control process, the annealing temperature is 700-780 ℃, and the slow cooling end point temperature is 640-690 ℃; the rapid cooling end temperature is 400-440 ℃, and the cooling speed of the rapid cooling section is more than 35 ℃/s; the temperature of the overaging section is 320-400 ℃, and the leveling elongation is 0.5-1.8%. The temperature of the soaking section is set to 700-780 ℃, the heat preservation time is 80-180 s, and the temperature of the soaking section is preferably 720-760 ℃; preferably, the flat elongation is set to 0.5 to 1.0%. The continuous annealing control process is produced by using a continuous annealing unit.
The chilled base plate enters a continuous annealing furnace after being welded and cleaned, and rapid heating is adopted in critical zone annealing to avoid coarsening of grains after annealing; the temperature of the soaking section is set to 700-780 ℃, the heat preservation time is 80-180 s, and the preferable temperature is 720-760 ℃ from the aspects of equipment requirements and economy of the continuous annealing unit; the final temperature of slow cooling is 640-690 ℃, the solid solution carbon content and gamma-alpha transformation in steel are controlled through slow cooling rate, {111} texture is fully developed, the anisotropy difference of strip steel is reduced, and the r value of the strip steel is improved; the final temperature of the rapid cooling section is 400-440 ℃, the cooling speed of the rapid cooling section is more than 35 ℃/s, the solid solution C content in the steel before overaging is ensured, a large amount of cementite is precipitated in ferrite grains in the subsequent overaging section to serve as a hydrogen storage trap, and meanwhile, the solid solution carbon content in a finished product is reduced, so that the elongation of the strip steel is improved. The temperature of the overaging section is 320-400 ℃, so that a large amount of cementite is precipitated in the steel to be used as a hydrogen storage trap; the flattening elongation is set to be 0.5-1.0% according to the thickness range of the strip steel, and the yield point extension of the strip steel is eliminated.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention forms a key technology for producing ultra-deep drawing enamel steel for ovens on a continuous annealing unit.
(2) The low-carbon cold-rolled enamel steel produced by the invention fully utilizes the characteristics of a continuous annealing unit, has lower annealing temperature and ageing-losing temperature, and has the advantage of low cost. The smelting cost is lower, and the produced product has excellent surface quality, good forming performance and anti-scaling performance and good economic benefit.
(3) The ultra-deep drawing cold rolling enamel steel for the oven with the anti-grain line defect has the characteristics of excellent stamping forming performance and capability of effectively resisting the grain line defect on the enamel surface, and when the oven liner part is produced, the enamel surface is batched due to Al 2 O 3 The enamel steel produced by the process can effectively eliminate the defects, improve the production efficiency and reduce the defect rate.
Drawings
FIG. 1 is a photograph of a microstructure of ultra-deep drawing cold rolled enamel steel for a striae defect resistant oven of example 1;
FIG. 2 is a photograph of a microstructure of ultra-deep drawing cold rolled enamel steel for a striae defect resistant oven of example 2;
FIG. 3 is a photograph of a ridge defect occurring in a prior art oven part;
fig. 4 is a photograph of the ultra-deep drawing cold-rolled enamel steel with the anti-grain line defect prepared in the example applied to an oven.
Detailed Description
The invention is further illustrated below in connection with specific examples, but is not limited in any way. For the sake of avoiding redundancy, the raw materials in the following examples are all commercially available unless specifically stated, and the quality grades are all industrial grades; the methods used are conventional methods unless otherwise specified.
Table 1 Components of each chilled coil in examples
| Numbering device | C | Si | Mn | P | S | Als | Ti | Fe and other unavoidable impurities |
| Example 1 | 0.0051 | 0.006 | 0.118 | 0.006 | 0.024 | 0.019 | 0.076 | 99.7459 |
| Example 2 | 0.0044 | 0.008 | 0.113 | 0.005 | 0.025 | 0.020 | 0.099 | 99.7256 |
The production method of the ultra-deep drawing cold-rolled enamel steel for the oven for resisting the line defects comprises the following steps of: cold rolling a substrate, cleaning, continuous annealing, leveling, trimming, surface quality inspection, oiling, coiling and finished product forming. The continuous annealing control process is produced by using a continuous annealing unit.
Table 2 hot rolling process in examples
| Numbering device | Heating temperature/. Degree.C | Finishing temperature/°c | Coiling temperature/. Degree.C | Thickness/mm of hot rolling |
| Example 1 | 1258 | 930 | 760 | 4.2 |
| Example 2 | 1239 | 925 | 753 | 3.5 |
Example 1
An ultra-deep drawing cold-rolled enamel steel for a grain line defect resistant oven and a production method thereof are provided:
the chemical composition of example 1 in Table 1 was selected for production with a thickness of 0.8mm, hot rolling temperature control as shown in Table 2, cold rolling reduction of 80.5%, annealing temperature of 778℃and elongation at flattening of 0.5%; the transverse mechanical properties of the finished product are shown in Table 3, and the microstructure is shown in FIG. 1. The enameling test is carried out as shown in FIG. 4, the coating has good adhesion and no scaling phenomenon after aging for 30 days. The enamel process has no line defect in batch production and good line defect resistance. Hydrogen permeation test was performed using European standard EN 10209-2013, with a TH value of 16.02min/mm 2 。
TABLE 3 mechanical Properties of the products of the examples
| Numbering device | Yield strength (MPa) | Tensile strength (MPa) | Elongation A 80 (％) | n 90 Value of | r 90 Value of |
| Example 1 | 138 | 308 | 43.5 | 0.2326 | 2.791 |
| Example 2 | 152 | 316 | 44.0 | 0.2354 | 2.815 |
Example 2
An ultra-deep drawing cold-rolled enamel steel for a grain line defect resistant oven and a production method thereof are provided:
the chemical composition of example 2 in Table 1 was selected for production with a thickness of 0.7mm, hot rolling temperature control as shown in Table 2, cold rolling reduction of 79.2% and annealing temperature of 792 ℃. The elongation at flatness was 0.6%, the transverse mechanical properties of the finished product were as shown in Table 3, and the microstructure was as shown in FIG. 2. The coating has good adhesion and no scaling phenomenon after aging for 30 days. The enamel process has no line defect in batch production and good line defect resistance. Hydrogen permeation test was performed using European standard EN 10209-2013, with a TH value of 15.81min/mm 2 。
Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall still fall within the scope of the technical solution of the present invention.
Claims (6)
1. The ultra-deep drawing cold-rolled enamel steel for the oven with the grain line defect resistance is characterized by comprising the following chemical components in percentage by mass: 0.03 to 0.08 percent of C, less than or equal to 0.05 percent of Si, 0.10 to 0.60 percent of Mn, less than or equal to 0.050 percent of P, less than or equal to 0.025 percent of S, less than or equal to 0.025 percent of Als, less than or equal to 0.01 percent of N, 0.05 to 0.15 percent of Ti, and the balance of Fe and unavoidable impurities.
2. According to claimThe ultra-deep drawing cold-rolled enamel steel for an oven with the grain line defect resistance as claimed in claim 1, wherein the ultra-deep drawing cold-rolled enamel steel for the oven has the following properties: the yield strength is 120-160 MPa, the tensile strength is 290-330 MPa, n 90 ≥0.20，r 90 ≥2.7，A 80 More than or equal to 43.0 percent; TH value of hydrogen permeation test is 15-17 min/mm 2 。
3. A method for producing ultra-deep drawing cold rolled enamel steel for a striae defect resistant oven according to any one of claims 1-2, characterized in that the method comprises the steps of: cold rolling a substrate, cleaning, continuous annealing, leveling, trimming, surface quality inspection, oiling, coiling and finished product forming.
4. A method according to claim 3, characterized in that: the method adopts a continuous annealing control process, the annealing temperature is 700-780 ℃, and the slow cooling end point temperature is 640-690 ℃; the rapid cooling end temperature is 400-440 ℃, and the cooling speed of the rapid cooling section is more than 35 ℃/s; the temperature of the overaging section is 320-400 ℃, and the leveling elongation is 0.5-1.8%.
5. The method according to claim 4, wherein: the soaking section temperature of the continuous annealing control process is set to 700-780 ℃, the heat preservation time is 80-180 s, and the preferable soaking section temperature is 720-760 ℃; preferably, the flat elongation is set to 0.5 to 1.0%.
6. The method according to claim 5, wherein: the continuous annealing control process is produced by using a continuous annealing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310771232.6A CN117089762A (en) | 2023-06-27 | 2023-06-27 | Ultra-deep drawing cold-rolled enamel steel for oven with grain line defect resistance and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310771232.6A CN117089762A (en) | 2023-06-27 | 2023-06-27 | Ultra-deep drawing cold-rolled enamel steel for oven with grain line defect resistance and production method thereof |
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| Publication Number | Publication Date |
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| CN117089762A true CN117089762A (en) | 2023-11-21 |
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| CN202310771232.6A Pending CN117089762A (en) | 2023-06-27 | 2023-06-27 | Ultra-deep drawing cold-rolled enamel steel for oven with grain line defect resistance and production method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN117089762A (en) |
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- 2023-06-27 CN CN202310771232.6A patent/CN117089762A/en active Pending
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