CN115449718B - Time-resistant pickled plate and production method thereof - Google Patents
Time-resistant pickled plate and production method thereof Download PDFInfo
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- CN115449718B CN115449718B CN202211000432.3A CN202211000432A CN115449718B CN 115449718 B CN115449718 B CN 115449718B CN 202211000432 A CN202211000432 A CN 202211000432A CN 115449718 B CN115449718 B CN 115449718B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000005098 hot rolling Methods 0.000 claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims abstract description 16
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 4
- 230000032683 aging Effects 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 230000003712 anti-aging effect Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000009749 continuous casting Methods 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 238000009966 trimming Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract description 2
- 230000009471 action Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 20
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 239000010936 titanium Substances 0.000 description 12
- 229910000859 α-Fe Inorganic materials 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000005554 pickling Methods 0.000 description 7
- 229910001566 austenite Inorganic materials 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 241000510097 Megalonaias nervosa Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
-
- 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
- C22C38/06—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
-
- 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
Abstract
The invention provides a time-resistant pickled plate and a production method thereof, wherein the time-resistant pickled plate comprises the following components: c:0.020 to 0.050 percent, mn:0.25 to 0.40 percent, S is less than or equal to 0.012 percent, P is less than or equal to 0.015 percent, si is less than or equal to 0.025 percent, als:0.025 to 0.050 percent of Ti:0.0015 to 0.0025 percent, less than or equal to 0.0045 percent of N, and the balance of Fe and unavoidable impurities. According to the invention, by adding Ti, hot rolling and high-temperature rolling, full-section sparse cooling and high-temperature coiling, C is promoted to be diffused and separated out under the action of high separating-out power, meanwhile, the formation ratio of TiN is improved, and the time-resisting performance of the material is improved. The performance range of the produced product is as follows: yield strength 220-280 MPa, tensile strength 320-380 MPa, elongation A 50 Not less than 43%, and after the temperature is kept at 100 ℃ for 3 hours, 1 day, 3 days and 7 days, the stretching curve has no yield platform.
Description
Technical Field
The invention belongs to the field of steel production, and particularly relates to a low-carbon mild steel pickling plate product with anti-aging property and a production method thereof.
Background
The household appliances and the automobile industry have larger demand for low-carbon mild steel series pickling plates, and meanwhile, with the increasing competition of the market, the terminal has higher requirements for the stamping performance of materials. In the process of processing the stamping problem of the terminal customer products, the low-carbon mild steel acid-washed plate is found to be easy to generate aging phenomenon, so that the yield strength of the products is obviously increased, the stamping performance of the products is reduced, and the problems of stamping cracking and the like are solved.
Patent publication No. CN 112226672A published in 2021, 1 and 15 discloses a method for producing anti-aging low-carbon steel by adopting a ferrite rolling process, and the patent proposes to fix nitrogen by using B and solve the aging problem in a ferrite area rolling mode, but the invention is easy to cause hot rolling and tail flicking during production, affects the production efficiency and quality of products, and has higher cost of B.
Patent publication No. CN 111074163A, 4.28.2020, discloses a time-efficient low-carbon Al-killed steel belt and a production method thereof. The invention is a cold-rolled annealed product, and also uses B to fix nitrogen so as to solve the aging problem. The problems of hot rolling tail flick, high cost and the like can also occur, and slight aging still occurs during accelerated aging.
The currently disclosed patent mainly aims to realize the anti-aging of the steel plate when B element is added on the basis of aluminum killed steel, but the hot rolling difficulty is high.
Disclosure of Invention
The invention aims to provide an anti-aging pickled plate and a production method thereof, which use a proper amount of Ti element to fix nitrogen and roll in a ferrite region, so that a good anti-aging effect can be achieved. Excessive Ti can form TiC to raise the product performance and influence the product performance stability, and meanwhile, the influence of B element on the hot rolling difficulty is solved.
The specific technical scheme of the invention is as follows:
an anti-aging pickled plate comprises the following components in percentage by mass:
c:0.020 to 0.050 percent, mn:0.25 to 0.40 percent, S is less than or equal to 0.012 percent, P is less than or equal to 0.015 percent, si is less than or equal to 0.025 percent, als:0.025 to 0.050 percent of Ti:0.0015 to 0.0025 percent, less than or equal to 0.0045 percent of N, and the balance of Fe and unavoidable impurities.
The yield strength of the anti-aging pickled plate is 220 MPa-280 MPa, the tensile strength is 320 MPa-390 MPa, and the elongation A is the same as that of the anti-aging pickled plate 50 More than or equal to 43 percent. Has the advantages of good aging resistance, low cost, easy production of hot rolling, etc.
The aging-resistant acid-washing board has no yield platform in the tensile curve after being subjected to heat preservation at 100 ℃ for 3 hours, 1 day, 3 days and 7 days and artificial accelerated aging, and has yield strength of 225-290 MPa, tensile strength of 320-380 MPa and elongation A 50 ≥39％。
The invention provides a production method of an anti-aging pickled plate, which comprises the following process flows:
molten iron pretreatment, converter smelting, alloy trimming station, RH, continuous casting, hot rolling, coiling, acid washing and finished product production.
The hot rolling is carried out, the heating temperature is controlled to be 1220-1250 ℃, the sufficient austenitization of the steel billet can be ensured, and various compounds can be sufficiently dissolved.
The hot rolling is carried out, the final rolling temperature is controlled to 880-910 ℃, the temperature can ensure that the final rolling temperature is controlled to be above austenite, and mixed crystals caused by rolling in a two-phase zone are avoided.
In order to improve the stability of the rolling performance of the product, sparse laminar cooling is adopted for cooling after hot rolling, and the uniformity of the rolling temperature and the hit rate of the coiling temperature are improved.
In order to further reduce the yield strength and improve the product forming property, high-temperature coiling is adopted, and the coiling temperature is 650+/-20 ℃.
The pickling process adopts a normal pickling process, so that the finished product is not leveled for saving the cost and improving the production efficiency.
The effect of the steel alloy elements in the invention is mainly based on the following principle:
carbon (C): the transformation point of C on steel, which can affect the steel to a large extent, is one of key elements determining a ferrite rolling process window, and generally the transformation temperature of austenite to ferrite is reduced along with the increase of the content of C, and the ferrite temperature interval is reduced. Too high a C content affects the solidification of Ti on N, too low a C content causes a decrease in yield strength, affects the rolling stability of hot rolling and increases the smelting cost, and therefore, the C content is controlled to be 0.020-0.050% in the invention.
Silicon (Si): the Si content is too high, scale on the surface of the steel plate is not easy to remove, microcracks pressed by oxides are easy to form on the surface, and the microcracks are used as crack sources to easily cause the steel plate to crack in the cold forming process. In addition, the content of Si element is too high to influence the electroplating performance of the steel plate, so that Si is less than or equal to 0.025 percent in the invention.
Manganese (Mn): mn can reduce the transformation temperature of austenite to ferrite (just can compensate the transformation temperature rise of austenite to ferrite caused by the reduction of the content of C element), expands the hot working temperature range and is beneficial to refining the grain size of ferrite; however, the Mn content is too high, which is unfavorable for plasticity, stamping performance and fatigue performance, and the Mn percentage control range in the invention is 0.25-0.40% comprehensively considered.
Phosphorus (P) and sulfur (S): p and S are residual harmful elements in molten iron, and in order to ensure the production stability and the forming performance of the steel, the P is less than or equal to 0.015 percent and the S is less than or equal to 0.012 percent.
Aluminum (Al): al is used as a main deoxidizer, and aluminum plays a certain role in refining grains. The disadvantage of aluminum is that it affects the hot workability, weldability and machinability of the steel. The invention controls the Al percentage content to be between 0.025 and 0.050 percent.
Titanium (Ti): ti element is strong carbide, sulfide and nitride forming element, and can play a role of solidifying N, but too high Ti can influence the stability of the same-coil performance of the pickling product, and too low Ti can not play a role of solidifying N and reducing aging, so the Ti element of the steel grade is controlled to be 0.0015% -0.0025%.
Nitrogen (N): n precipitation at normal temperature is an important cause of aging of steel sheets, and therefore, the present invention requires reduction of N content as much as possible. Therefore, the invention controls [ N ] to be less than or equal to 0.0045 percent.
Compared with the prior art, the invention mainly promotes C to be diffused and separated out under the action of high separating-out power by adding Ti, hot rolling and high-temperature rolling, full-section sparse cooling and high-temperature coiling, and simultaneously improves the formation ratio of TiN and the time-resisting performance of the material. The performance range of the produced product is as follows: yield strength 220-280 MPa, tensile strength 320-380 MPa, elongation A 50 More than or equal to 43 percent; after the temperature is kept at 100 ℃ for 3 hours, 1 day, 3 days and 7 days and the artificial accelerated aging is carried out, the tensile curve has no yield platform, the yield strength is 225-290 MPa, the tensile strength is 320-380 MPa, and the elongation A 50 ≥39％。
Drawings
FIG. 1 is an accelerated aging tensile curve (3 h hold) of example 1;
FIG. 2 is an accelerated aging tensile curve (3 h hold) for example 2;
FIG. 3 is an accelerated aging tensile curve (3 h hold) for comparative example 1;
FIG. 4 is an accelerated aging tensile curve (3 h hold) for comparative example 2.
Detailed Description
Example 1-example 2
An anti-aging pickled plate comprises the following components in percentage by mass: as shown in table 1, the balance not shown in table 1 is Fe and unavoidable impurities.
Comparative example 1-comparative example 2
An anti-aging pickled plate comprises the following components in percentage by mass: as shown in table 1, the balance not shown in table 1 is Fe and unavoidable impurities.
Table 1 chemical compositions of examples and comparative examples, wt%
The production method of the anti-aging pickled plate of each example and comparative example comprises the following process flows:
molten iron pretreatment, converter smelting, alloy trimming station, RH, continuous casting, hot rolling, coiling, acid washing and finished product production.
The hot rolling is carried out, the heating temperature is controlled to be 1220-1250 ℃, the sufficient austenitization of the steel billet can be ensured, and various compounds can be sufficiently dissolved.
The hot rolling is carried out, the final rolling temperature is controlled to 880-910 ℃, the temperature can ensure that the final rolling temperature is controlled to be above austenite, and mixed crystals caused by rolling in a two-phase zone are avoided.
In order to improve the stability of the rolling performance of the product, a sparse laminar cooling mode is adopted for hot rolling cooling.
In order to further reduce the yield strength and improve the product forming property, high-temperature coiling is adopted, and the coiling temperature is 650+/-20 ℃.
The pickling process adopts a normal pickling process, so that the finished product is not leveled for saving the cost and improving the production efficiency.
The specific production process parameters of each example and comparative example are shown in table 2.
Table 2 production process parameters for each of the examples and comparative examples
Examples 1 and 2 contained Ti and used a coiling temperature of 650.+ -. 20 ℃ and comparative example 1 and comparative example 2 did not contain Ti, the coiling temperature of comparative example 1 was 560 ℃ and the coiling temperature of comparative example 2 was 600 ℃.
The properties of the time-resistant acid-washed panels produced in each example and comparative example are shown in Table 3.
Table 3 product properties for each of the examples and comparative examples
| Category(s) | Direction | R p0.2 /MPa | R m /MPa | A 50 /％ |
| Example 1 | 90° | 225 | 347 | 48 |
| Example 2 | 90° | 231 | 365 | 45 |
| Comparative example 1 | 90° | 278 | 389 | 41 |
| Comparative example 2 | 90° | 263 | 373 | 41 |
After the artificial accelerated aging is carried out at 100 ℃ for 3 hours, the performances of the example 1 and the example 2 are not changed, the yield strength of the comparative example 1 and the comparative example 2 is increased by about 30MPa, and the elongation is also obviously reduced; after 1 day of incubation, the properties of example 1 and example 2 were unchanged, and the yield strength of comparative example 1 and comparative example 2 was increased by about 20MPa; after 3 and 7 days of incubation, the properties remained essentially unchanged and no further aging occurred.
TABLE 4 Properties after artificially accelerated aging for examples and comparative examples
The above examples illustrate that the acid wash boards of the present invention have a relatively strong resistance to aging.
The foregoing description is only illustrative of the present invention, and it is to be understood that the specific implementation of the present invention is not limited by the foregoing manner, and it is within the scope of the present invention to apply the technical concept and technical solution of the present invention to other situations without any substantial improvement or any improvement.
Claims (4)
1. The anti-aging pickled plate is characterized by comprising the following components in percentage by mass:
c:0.020 to 0.050 percent, mn:0.25 to 0.40 percent, S is less than or equal to 0.012 percent, P is less than or equal to 0.015 percent, si is less than or equal to 0.025 percent, als:0.025 to 0.050 percent of Ti:0.0015 to 0.0025 percent, N is less than or equal to 0.0045 percent, and the balance is Fe and unavoidable impurities;
the production method of the anti-aging pickled plate comprises the following process flows: molten iron pretreatment, converter smelting, alloy trimming station, RH, continuous casting, hot rolling, coiling, acid washing and finished product obtaining;
the hot rolling is carried out, and the heating temperature is controlled to be 1220-1250 ℃; the final rolling temperature is controlled to be 880-910 ℃; coiling after hot rolling, wherein the coiling temperature is 650+/-20 ℃;
the yield strength of the anti-aging acid washing plate is 220-280 MPa, the tensile strength is 320-390 MPa, and the elongation is more than or equal to 43%;
the aging-resistant acid-washing board has no yield platform in the tensile curve after being subjected to heat preservation at 100 ℃ for 3 hours, 1 day, 3 days and 7 days and artificial accelerated aging, and has yield strength of 225-290 MPa, tensile strength of 320-380 MPa and elongation A 50 ≥39%。
2. The time-resistant acid-washed plate of claim 1, wherein the time-resistant acid-washed plate comprises the following components in percentage by mass:
c:0.045%, si:0.016%, mn:0.330%, S:0.006%, P: 0.010%, als:0.030%, ti:0.0024%, N0.0035%, and the balance of Fe and unavoidable impurities.
3. The time-resistant acid-washed plate of claim 1, wherein the time-resistant acid-washed plate comprises the following components in percentage by mass:
c:0.037%, si:0.020%, mn:0.350%, S:0.004%, P: 0.012%, als:0.035%, ti:0.0020%, N0.0029%, and the balance of Fe and unavoidable impurities.
4. A method of producing a time-resistant pickled plate as claimed in any one of claims 1 to 3, comprising the steps of: molten iron pretreatment, converter smelting, alloy trimming station, RH, continuous casting, hot rolling, coiling, acid washing and finished product production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211000432.3A CN115449718B (en) | 2022-08-19 | 2022-08-19 | Time-resistant pickled plate and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211000432.3A CN115449718B (en) | 2022-08-19 | 2022-08-19 | Time-resistant pickled plate and production method thereof |
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| Publication Number | Publication Date |
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| CN115449718A CN115449718A (en) | 2022-12-09 |
| CN115449718B true CN115449718B (en) | 2024-01-16 |
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| KR20010060648A (en) * | 1999-12-27 | 2001-07-07 | 이구택 | A method for manufacturing hot rolled steel sheet with excellent nonaging and uniform elongation properties |
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| KR20120044141A (en) * | 2010-10-27 | 2012-05-07 | 현대제철 주식회사 | Extemely low carbon steel with excellent aging resistance and workability and method of manufacturing the low carbon steel |
| CN103498101A (en) * | 2013-10-22 | 2014-01-08 | 武汉钢铁(集团)公司 | Low-cost aging resistant household appliance color coated sheet and production method thereof |
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| CN107723593A (en) * | 2017-09-30 | 2018-02-23 | 日照宝华新材料有限公司 | Based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling |
| CN107779743A (en) * | 2016-08-30 | 2018-03-09 | 上海梅山钢铁股份有限公司 | Micro- carbon hot rolling acid-cleaning steel plate and its manufacture method with good deep drawability |
| CN108796388A (en) * | 2018-08-06 | 2018-11-13 | 首钢集团有限公司 | A kind of color coating hot-dip galvanizing sheet steel and its manufacturing method |
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2022
- 2022-08-19 CN CN202211000432.3A patent/CN115449718B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010060648A (en) * | 1999-12-27 | 2001-07-07 | 이구택 | A method for manufacturing hot rolled steel sheet with excellent nonaging and uniform elongation properties |
| JP2005008904A (en) * | 2003-06-16 | 2005-01-13 | Sumitomo Metal Ind Ltd | Cold rolled high tensile strength steel sheet and manufacturing method |
| JP2005008940A (en) * | 2003-06-18 | 2005-01-13 | Sumitomo Metal Ind Ltd | Cold rolled high tensile strength steel sheet and its manufacturing method |
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| CN103643118A (en) * | 2013-12-26 | 2014-03-19 | 马钢(集团)控股有限公司 | Hot-rolled and pickled steel plate for 380MPa-grade single-sided enamel and production method thereof |
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| CN107723593A (en) * | 2017-09-30 | 2018-02-23 | 日照宝华新材料有限公司 | Based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling |
| CN108796388A (en) * | 2018-08-06 | 2018-11-13 | 首钢集团有限公司 | A kind of color coating hot-dip galvanizing sheet steel and its manufacturing method |
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| CN115449718A (en) | 2022-12-09 |
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