CN105112778B - A kind of 460MPa level automotive frame coated steel and its ultrafast cold production method - Google Patents
A kind of 460MPa level automotive frame coated steel and its ultrafast cold production method Download PDFInfo
- Publication number
- CN105112778B CN105112778B CN201510545025.4A CN201510545025A CN105112778B CN 105112778 B CN105112778 B CN 105112778B CN 201510545025 A CN201510545025 A CN 201510545025A CN 105112778 B CN105112778 B CN 105112778B
- Authority
- CN
- China
- Prior art keywords
- cooling
- steel
- carry out
- argon
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 32
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 229910052786 argon Inorganic materials 0.000 claims abstract description 11
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000005098 hot rolling Methods 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 230000011218 segmentation Effects 0.000 claims abstract description 5
- 238000003723 Smelting Methods 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 10
- 238000000576 coating method Methods 0.000 abstract description 10
- 229910045601 alloy Inorganic materials 0.000 abstract description 8
- 239000000956 alloy Substances 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 5
- 238000005246 galvanizing Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 9
- 239000010955 niobium Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 239000011572 manganese Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical group 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
A kind of 460MPa level automotive frame coated steel, its chemical composition and wt% are：C：0.06 ~ 0.09%, Si≤0.027%, Mn：1.00 ~ 1.20%, P≤0.015%, S≤0.008%, Als：0.020 ~ 0.060%, Nb：0.020~0.030%；Production stage：Argon station Argon is entered after converter smelting；Tap and be casting continuously to form after base to heating strand；Segmentation hot rolling；Carry out section cooling using becoming the speed type of cooling；Batch；Finishing and rear operation.The present invention is under relatively low design of alloy, cooled down and sub-sectional cooling using becoming speed, on the premise of the mechanical property ensureing steel plate, the coating beam steel being produced its there is excellent surface quality and platability, galvanizing production can directly be carried out, and the dent resistance of steel plate, coating adhesion is further enhanced, and surface quality is good.
Description
Technical field
The present invention relates to a kind of automobile steel and production method, specifically belong to a kind of 460MPa level automotive frame coating
Steel and its ultrafast cold production method.
Background technology
Coating hot-rolled steel is used widely in the automotive frame higher for surface quality requirements.Hot-dip galvanizing sheet steel table
Face has coating light, uniform color, the feature of good durability and aesthetic property；Meanwhile, the part such as automotive frame also requires
Steel have good dent resistance, and should have high-yield-ratio.
At present, with regard to its beam steel still in the rank steel grade such as Q345, Q235, then in such steel grade surface hot galvanized layer.
Due to the continuous development of auto industry, it can not meet the requirement manufacturing high-strength vehicle structural member and its surface galvanizing.
For this reason, steel industry manufacturer is all in the research actively developing the parties concerned and development.
In prior art, the cooling for steel plate is all cooled to requirement using a relatively low or conventional stable rate of cooling
Temperature, a large amount of analysis and research through the applicant, using this type of cooling produce steel plate, for reaching intensity and the group of regulation
Knit, generally require to add more alloying element, production cost is higher.
Through preliminary search, Chinese Patent Application No. is the document of CN200910063433.0, discloses a kind of yield strength
The production method of 460MPa level coating hot-rolled structural steel, it includes in turn including the following steps：Steel-making, continuous casting, heating of plate blank,
Hot continuous rolling, section cooling, batch；It is characterized in that in the chemical analysis of steelmaking process and percentage by weight being：C：0.05～
0.10%；Si≤0.04；Mn：1.30～1.65%；P≤0.030%；S≤0.012%；Als：0.01～0.06%；Nb：
0.035～0.060%；Balance of Fe and being inevitably mingled with；Controlled rolling, wherein slab heating temperature is adopted in hot rolling
For 1200～1260 DEG C；Roughing outlet temperature is 1020～1080 DEG C；Hot rolling finishing temperature is 790～850 DEG C；In coiling process
In, coiling temperature is 540～600 DEG C.The technical scheme enumerated is：C：0.075%；Si：0.02%；Mn：1.5%；P：0.02%；S：
0.01%；Als：0.03%；Nb：0.050%；1230 DEG C of slab heating temperature；820 DEG C of finishing temperature；570 DEG C of coiling temperature.This article
Offer the conventional laminar flow type of cooling being to adopt after hot rolled, it exists, and the alloy content of steel design is high, and relatively costly asks
Topic.
Content of the invention
The present invention in view of the shortcomings of the prior art, provides one kind ensureing yield strength >=460MPa, tensile strength
520-670MPa, elongation percentage can reach A >=19%, and 180 ° of cross bending test D=1a are qualified, and yield tensile ratio reaches more than 0.85
Under the premise of, by using supper-fast sub-sectional cooling technique after rolling, and under relatively low alloying component, improve the dent resistance of steel plate,
460MPa level automotive frame coated steel and production method that coating adhesion is further enhanced.
Realize the measure of above-mentioned purpose：
A kind of 460MPa level automotive frame coated steel, its chemical composition and weight percent content are：C：0.06~
0.09%, Si≤0.027%, Mn：1.00 ~ 1.20%, P≤0.015%, S≤0.008%, Als：0.020 ~ 0.060%, Nb：0.020~
0.030%, balance of Fe and inevitable impurity.
Preferably：The weight percent content of Si is less than 0.02%.
Preferably：The weight percent content of Nb is 0.023 ~ 0.028%.
Produce a kind of method of 460MPa level automotive frame coated steel, its step：
1）Enter argon station Argon after converter smelting, and conventional plus aluminum steel deoxidation and composition adjustment；Control argon blowing time：Bottom
Blow and be not less than 4min, top blast is not less than 5min；
2）Through tapping and being casting continuously to form to heating strand after base, its heating and temperature control at 1265 ~ 1300 DEG C, 30 during heating ~
40min；
3）Carry out segmentation hot rolling, and control roughing end temp at 1070 ~ 1100 DEG C, control finish rolling finishing temperature 865 ~
890℃；
4）Carry out section cooling using becoming the speed type of cooling, that is,：First cool down under rate of cooling is 120 ~ 140 DEG C/sec
To 700 ~ 740 DEG C, the rate of cooling according still further to 5 ~ 10 DEG C/sec is cooled to coiling temperature；
5）Batched, controlled coiling temperature at 620 ~ 640 DEG C；
6）Carry out finishing and rear operation.
In the present invention effect of each component and main technique and control the reasons why：
Carbon：Carbon is cheap solution strengthening element.According to the range of application of this steel grade, it is mainly used in processing coating with greatly
Beam, send the parts such as transformer tower, need to carry out a certain degree of Pressing Deformation processing, therefore it is required that material is meeting intensity requirement
Meanwhile, there is good cold forming performance.If its content is less than 0.06%, the requirement of the strength of materials can not be met；If its
Content is more than 0.09%, then can not meet the favorable forming property of material.So, its content is limited to 0.06～0.09% model
Enclose.
Silicon：Silicon be cheap and effective deoxygenation of liquid steel element it is also possible to play the effect improving steel strength, but at this
It is controlled by as harmful element in bright.Should be more low better.This is because silicon can deteriorate hot-rolled steel in the present invention
The surface quality of plate, makes surface blackening in follow-up galvanizing process simultaneously, and affecting it can zinc-plated property.Therefore silicone content is carried out
Strict control, its content is limited to less than 0.027%.Preferably：The weight percent content of Si is less than 0.02%.
Manganese：Manganese is to improve intensity and the maximally effective element of toughness.If its content is less than 1. 00%, material can not be met
Intensity requirement；But add the manganese of volume, can lead to increase the quenching degree of steel, make crackle quick due to welding the appearance of hardened layer
Perception increases, and increases the cost of alloy of steel.In consideration of it, 1.20% will be defined to thereon, so, its content is limited to 1.
00～1.20% scope.
Phosphorus：In order to avoid the welding performance of material, stamping formabilily, toughness, suitability for secondary processing deteriorate, set
Its upper content limit is 0.015%.So its content is controlled below 0.015%.
Sulfur：Sulfur is very harmful element.Sulfur in steel is often existed with the oxide morphology of manganese, this sulphide inculsion pair
The impact flexibility of steel is very unfavorable, and causes the anisotropy of performance, therefore, sulfur content in steel need to be controlled more low more
Good.Based on the consideration to Steel Sheet technique Manufacturing cost, plan sulfur content in steel and control below 0.008%.
Aluminum：Aluminum adds for deoxidation, when Als content is less than 0.020% it is impossible to play its effect；The opposing party
Face, the aluminum due to adding volume easily forms aluminium oxide agglomerate, so it is stipulated that the Als upper limit is 0.060%.Therefore, Als content limit
It is scheduled on 0.020～0.060% scope.
Niobium：Niobium mainly improves the intensity of steel by crystal grain thinning and precipitation hardening, is strong carbon, nitrogen compound
Form element, main in steel existed with Nb (C, N) form, stops growing up of austenite crystal, finally makes ferrite crystal grain chi
Very little diminish, thinning microstructure.When its content is less than 0.020% it is impossible to meet the requirement of material high intensity；And the niobium adding is higher than
When 0.030%, can meet the requirement of its intensity and processability, if adding, cost of alloy can significantly rise again.So, according to
The performance objective of steel grade requires, and its content is limited to 0.020～0.030% scope.Preferably：The weight percent content of Nb
0.023 ~ 0.028%.
For improve steel surface quality it is ensured that material can zinc-plated property, present invention employs strand high temperature rapid firing technique
To carry out heating strand, to be one of critical process.The present invention takes 1265 ~ 1300 DEG C of heating-up temperatures to be to ensure that the alloy in steel billet
The minimum temperature that element is completely dissolved, reduces the heating strand time, being controlled in 30 ~ 40min is to reduce steel billet simultaneously
The stove internal oxidition time, reduce billet surface iron scale, improve surface quality.
With regard to carrying out segmentation rolling, and control roughing end temp at 1070 ~ 1100 DEG C, control finish rolling finishing temperature to exist
865~890℃.
Why the present invention carries out section cooling using cooling speed change cooling, at ultrafast cold section according to rate of cooling is first
120 ~ 140 DEG C/sec carry out that front end is cold by force, and according still further to rate of cooling, 5 ~ 10 DEG C/sec are cooled to 620 ~ 640 DEG C of coiling temperature, be through
After lot of experiments analysis, this type of cooling can make steel plate reach respective strengths and require under relatively low design of alloy.
Using sub-sectional cooling mode, not only can guarantee that the recrystal grain in steel does not have started and cooled down in time when growing up, it is to avoid
The generation of thick tissue, to obtain tiny metallographic structure, increases number of grain boundaries, improves the yield tensile ratio of material, and be conducive to
To uniform metallographic structure, so that the precipitate even dispersion such as carbide is distributed in base steel it is ensured that material possess good
Cold forming performance.
The present invention compared with prior art, under relatively low design of alloy, using ultra-rapid cooling and sub-sectional cooling
Technique, the coating beam steel being produced its there is excellent surface quality and platability, directly can carry out galvanizing production, full
The requirement of sufficient subsequent thermal galvanizer ordered pair plate surface quality, simultaneously steel plate there is yield strength ReL >=460MPa, tensile strength
520-670MPa, elongation percentage can reach A >=19%, and 180 ° of cross bending test D=1a are qualified, and yield tensile ratio reaches more than 0.85
Under the premise of, improve the dent resistance of steel plate, coating adhesion is further enhanced, and has good surface quality.
Brief description
Accompanying drawing is metallographic structure figure of the present invention.
Specific embodiment
Below the present invention is described in detail：
Table 1 is the comparative example of various embodiments of the present invention；
Table 2 is the main technologic parameters list of various embodiments of the present invention；
Table 3 is various embodiments of the present invention performance text list.
Various embodiments of the present invention produce according to following steps：
1）Enter argon station Argon after converter smelting, and conventional plus aluminum steel deoxidation and composition adjustment；Control argon blowing time：Bottom
Blow and be not less than 4min, top blast is not less than 5min；
2）Through tapping and being casting continuously to form to heating strand after base, its heating and temperature control at 1265 ~ 1300 DEG C, 30 during heating ~
40min；
3）Carry out segmentation hot rolling, and control roughing end temp at 1070 ~ 1100 DEG C, control finish rolling finishing temperature 865 ~
890℃；
4）Carry out section cooling using becoming the speed type of cooling, that is,：First cool down under rate of cooling is 120 ~ 140 DEG C/sec
To 700 ~ 740 DEG C, the rate of cooling according still further to 5 ~ 10 DEG C/sec is cooled to coiling temperature；
5）Batched, controlled coiling temperature at 620 ~ 640 DEG C；
6）Carry out finishing and rear operation.
Table 1 various embodiments of the present invention and the composition value list of comparative example（wt%）
Table 2 various embodiments of the present invention and the main technologic parameters list of comparative example
Table 3 various embodiments of the present invention and comparative example mechanical properties test the results list
Can analyze from table 3, the present invention using under ultra-rapid cooling and sub-sectional cooling technique, with far below comparative example
Design of alloy, obtain the mechanical property close with comparative example, production cost is substantially reduced, product is cold simultaneously
Forming property is improved, and is 2 times of comparative example.
This specific embodiment only most preferably enumerates, not the restricted enforcement to technical solution of the present invention.
Claims (1)
1. produce a kind of method of 460MPa level automotive frame coated steel, its step：
1）Enter argon station Argon after converter smelting, and conventional plus aluminum steel deoxidation and composition adjustment；Control argon blowing time：Bottom blowing is not
Less than 4min, top blast is not less than 5min；Molten steel terminal chemical composition and weight percent content are：C：0.06 ~ 0.09%, Si≤
0.027%, Mn：1.00 ~ 1.20%, P≤0.015%, S≤0.008%, Als：0.020 ~ 0.060%, Nb：0.020 ~ 0.029%, remaining
Measure as Fe and inevitable impurity；
2）Through tapping and being casting continuously to form to heating strand after base, its heating and temperature control at 1265 ~ 1300 DEG C, 30 during heating ~
40min；
3）Carry out segmentation hot rolling, and control roughing end temp at 1070 ~ 1100 DEG C, control finish rolling finishing temperature 865 ~ 890
℃；
4）Carry out section cooling using becoming the speed type of cooling, that is,：First under rate of cooling is 120 ~ 140 DEG C/sec, it is cooled to 705
~ 740 DEG C, the rate of cooling according still further to 5 ~ 7 DEG C/sec is cooled to coiling temperature；
5）Batched, controlled coiling temperature at 623 ~ 640 DEG C；
6）Carry out finishing and rear operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510545025.4A CN105112778B (en) | 2015-08-31 | 2015-08-31 | A kind of 460MPa level automotive frame coated steel and its ultrafast cold production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510545025.4A CN105112778B (en) | 2015-08-31 | 2015-08-31 | A kind of 460MPa level automotive frame coated steel and its ultrafast cold production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105112778A CN105112778A (en) | 2015-12-02 |
| CN105112778B true CN105112778B (en) | 2017-03-08 |
Family
ID=54660876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510545025.4A Active CN105112778B (en) | 2015-08-31 | 2015-08-31 | A kind of 460MPa level automotive frame coated steel and its ultrafast cold production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105112778B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369135B (en) * | 2015-12-22 | 2017-11-17 | 武汉钢铁有限公司 | A kind of 450MPa levels car Galvanized Dual Phase Steel and production method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3616472B2 (en) * | 1997-04-10 | 2005-02-02 | 新日本製鐵株式会社 | Method for producing high-strength hot-dip galvanized steel sheet with excellent workability |
| CN102094149A (en) * | 2011-03-08 | 2011-06-15 | 攀钢集团钢铁钒钛股份有限公司 | Niobium-containing high-strength hot-galvanized steel plate and production method thereof |
| CN102776442B (en) * | 2012-07-27 | 2014-04-09 | 武汉钢铁(集团)公司 | Hot rolled steel used for stirrer in automotive stirring tank and production method thereof |
| CN104032215B (en) * | 2014-05-30 | 2016-08-17 | 武汉钢铁(集团)公司 | 420MPa level steel for automobile wheel and production method thereof |
-
2015
- 2015-08-31 CN CN201510545025.4A patent/CN105112778B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105112778A (en) | 2015-12-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105088068B (en) | A kind of 500MPa grades of automotive frame coated steel and its ultrafast cold production method | |
| CN109097705A (en) | A kind of 800MPa grade cold rolling hot dip galvanizing dual phase steel and its production method | |
| CN110643894B (en) | Ultra-high strength hot rolled steel sheet and steel strip having good fatigue and hole expansion properties, and method for manufacturing same | |
| CN104032215B (en) | 420MPa level steel for automobile wheel and production method thereof | |
| CN105803334B (en) | Tensile strength 700MPa level hot rolling Multiphase Steels and its production method | |
| CN109423577B (en) | High-strength multi-phase steel tinning raw plate and manufacturing method thereof | |
| CN103509997A (en) | 440MPa-class cold-rolled high-intensity automobile structural steel and manufacturing method thereof | |
| CN105950984B (en) | Tensile strength 650MPa level hot rolling Multiphase Steels and its production method | |
| CN105925903A (en) | Cold-rolled low-alloy high-strength steel for automobiles and production method thereof | |
| CN113416889A (en) | Ultrahigh-strength hot-dip galvanized DH1470 steel with good welding performance and preparation method thereof | |
| CN113528940A (en) | A kind of aluminum-silicon alloy coating hot forming steel and preparation method thereof | |
| CN115125439A (en) | Hot stamping forming steel with zinc-based coating layer of 1800Mpa grade and preparation method | |
| CN108342654A (en) | The manufacturing method of the cold rolling glassed steel of yield strength 230MPa or more | |
| CN108588559A (en) | The cold rolling glassed steel of yield strength 230MPa or more | |
| CN110983198A (en) | Alloying hot galvanizing dual-phase steel and preparation method thereof | |
| CN104213026A (en) | Hot galvanizing high-strength steel with tensile strength of 370 MPa for car outer covering piece and production method thereof | |
| CN110714165A (en) | Cold-rolled sheet for 320 MPa-level household appliance panel and production method thereof | |
| CN107829038A (en) | A kind of high strength and ductility, high platability fine grain hot dip galvanized dual phase steel and its production method | |
| CN105112778B (en) | A kind of 460MPa level automotive frame coated steel and its ultrafast cold production method | |
| CN113718166A (en) | Hot-dip aluminum-zinc steel plate with yield strength of 320MPa and manufacturing method thereof | |
| CN105238999A (en) | 350MPa grade thick standard hot-dip galvanized steel and production method thereof | |
| CN106834937B (en) | A kind of 530MPa levels Thin Specs galvanized steel and its production method | |
| CN105821315B (en) | Tensile strength 750MPa level hot rolling Multiphase Steels and its production method | |
| CN114934228A (en) | Hot-formed steel plate and production method thereof | |
| CN112226674B (en) | Aging-resistant cold-rolled hot-galvanized steel plate for household appliances and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170711 Address after: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2 Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |
|
| TR01 | Transfer of patent right |