CN104264048B - Blued packing tape with tensile strength of more than 1500MPa and production method of blued packing tape - Google Patents
Blued packing tape with tensile strength of more than 1500MPa and production method of blued packing tape Download PDFInfo
- Publication number
- CN104264048B CN104264048B CN201410480663.8A CN201410480663A CN104264048B CN 104264048 B CN104264048 B CN 104264048B CN 201410480663 A CN201410480663 A CN 201410480663A CN 104264048 B CN104264048 B CN 104264048B
- Authority
- CN
- China
- Prior art keywords
- percent
- tensile strength
- tie
- temperature
- 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
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a blued packing tape with tensile strength of more than 1500MPa. The blued packing tape comprises the following components in percentage by weight: 0.03-0.25 percent of C, 0.05-0.20 percent of Si, 0.50-2.50 percent of Mn, 0.01-0.10 percent of P, 0-0.015 percent of S, 0.01-0.20 percent of Als, 0.05-0.20 percent of Ti and 0.004-0.010 percent of N. The process comprises the following steps: smelting, performing controlled rolling and controlled cooling, and bluing and annealing. After a proper amount of Ti is added, Ti and C are combined to form nano-scale TiC, TiN and TiCN, and the product serves as the second phase precipitate which is small and disperses in steel so as to achieve the important precipitation strengthening effect; and according to the Ti in the packing tape, the austenite grain size can be controlled under extremely high soaking temperature, grain control in a heat affected zone is facilitated, and the welding performance of the high-strength packing tape is improved. Although lead bath furnace annealing is adopted, the temperature is only 200 to 300 DEG C and is far lower than volatilization temperature of lead, so that lead volatilization is avoided, and the environmental pollution is avoided. The blued packing tape disclosed by the invention is low in cost, good in performance, simple and feasible in process and high in production efficiency, and ultrahigh-strength packing tapes with the tensile strength of larger than 1500MPa are produced.
Description
Technical field
Tie and production method the present invention relates to one kind is turned blue, specifically belong to a kind of sending out of tensile strength >=1500MPa
Blue tie and production method.
Background technology
Superhigh intensity tie is a kind of thin ribbon shaped steel product ensureing safe handling of cargo and transport, and it is widely used in steel
The packaging of material, non-ferrous metal, light textile product, building materials, glass, Nicotiana tabacum L., paper roll, Pilus Caprae seu Oviss and other items.Superhigh intensity tie typically will
The features such as ask " tensile strength is not less than 1200 MPa, and elongation percentage is not less than 8%, and corrosion resisting property is good ", thus have intensity high,
Ductility is good, lash firmly and in cargo handling process not broken belt, is difficult the advantages such as Bales Off in transportation.Further, since long-term work
Under outdoor environment, require tie to have certain corrosion resistance simultaneously.
Just at present, it is applied to steel products（Hot rolled coil, cold rolling coil, pipeline, wire rod etc.）Pack the high-strength binding band tied up
It is in great demand.Because the product structure of each steel mill is different, therefore also different to the demand of tie.In general, strip product
Tie consumption more than Bar Wire Product product.According to the preliminary analyses to iron and steel enterprise, every 1000 tons of steel averagely need to consume 1 ton
Tie.In the production capacity of 7.8 hundred million tons of steel of China, if 40% ratio of only being accounted for hot-rolled product and flat steel product, to calculate, also will reach
The scale of 300000000 tons of steel, and accordingly supporting tie market capacity also reaches 300,000 tons, wherein the tie of 1500MPa rank needs
The amount of asking accounts for 10% about.
At present in steel products（Hot rolled coil, cold rolling coil, pipeline, wire rod etc.）Pack the tie tied up, its maximum intensity level
Bu Chaoguo not 1350MPa.This is for the cut deal field being applied to steel products（As heavy rail, large-sized bridge steel, heavy construction are used
Steel, the large-scale deck of boat, big tank steel etc.）For tying up for more than 100 tons of product, safety coefficient is low, is also easy to produce breakage problem.Pin
To this problem, applicant has developed turn blue tie and the production method of a kind of tensile strength >=1500MPa, its intensity and not
Tie safety affluence degree greatly, phenomenon of rupture will not be produced.
The production technology of tie has three kinds of modes, that is,：First, the work that hot rolling raw material is annealed after cold rolling strengthening again
Skill, is currently used primarily in and produces tensile strength 800 ~ 900MPa, the tie of elongation percentage >=4%, this process is simple, low production cost,
But it is high to the prescription of tie raw material；2nd, adopt the bainite strengthening treatment process of lead-pot furnace isothermal hardening, mainly
Produce tensile strength >=980MPa, the tie of elongation percentage >=10%, but lead to easily cause environment due to employing lead-pot furnace
Pollution and potential safety hazard, simultaneously relatively costly；3rd, adopt the martensite strengthening handling process of two-phase section quenching, main production resists
Tensile strength >=940MPa, the tie of elongation percentage >=8%, this process contamination is little, efficiency of utilization is high, but due to cost, equipment and
Some problems such as technology lead to it to improve not enough and ripe.
Through retrieval, the existing at present tensile strength highest tie that can find is document 1（Wang Qiang；Cao Dongjie. superelevation is strong
The development of degree steel belt for packages. China E-Commerce Business .2011 (1). ~ 222 ~ 222）In " Baosteel develop 1350MPa superhigh intensity
Steel band, main technique for cold rolling feedses adopt lead bath modulation treatment occur tissue change, after through slitting, japanning waxing form,
Lead bath temperature is 355～365 DEG C, strip speed 15～19m/min, is heated to more than 860 DEG C of austenitic temperature, enters back into lead bath
Deng literary composition quenching, then through scraping lead, water-cooled, batch semi-finished product after air cooling.Therefore, a kind of tensile strength of this project development >=
1500MPa tie is the tie that currently the only intensity rank is more than 1500MPa, is also existing intensity rank highest packaging bundle
Band.
Content of the invention
The present invention in view of the shortcomings of the prior art, provides a kind of tensile strength R of tie finished productm>=1500 MPa,
Elongation percentage A50>=8%, tensile strength R of welding pointm>=1500 MPa, tie up cut deal product safety coefficient greatly, and adopt lead
Turn blue tie its production method that 200～300 DEG C of temperature does not result in volatilization of lead without environmental pollution is moved back in bath.
Realize the measure of above-mentioned purpose：
A kind of tie that turns blue of tensile strength >=1500MPa, its component and weight percent content are：C：0.03~
0.25%, Si：0.05 ~ 0.20%, Mn：0.50 ~ 2.50%, P：0.01 ~ 0.10%, S：0 ~ 0.015%, Als：0.01 ~ 0.20%, Ti：
0.05 ~ 0.20%, N：0.004 ~ 0.010%, remaining is Fe and inevitable tramp element.
Preferably：Si weight percent content is 0.05 ~ 0.13%.
Preferably：P weight percent content is 0.01 ~ 0.085%.
Produce a kind of method of the tie that turns blue of tensile strength >=1500MPa, its step：
1）Smelt：Molten iron pretreatment RH application of vacuum inclusions class, wherein：Control into stove molten iron S content
≤0.005%；Vacuum processing time is no less than 15 minutes；In ladle furnace feed CaSi line, feed quantity according to 700 ~ 800 grams/
Ton, wire-feeding velocity is in 250 ~ 300m/min；
2）Carry out controlled rolling and controlled cooling
Therebetween：By heating of plate blank to 1200 ~ 1300 DEG C；Control finishing temperature at 750 ~ 950 DEG C；Coiling temperature is controlled to exist
450~800℃；Control rate of cooling in 5 ~ 30 DEG C/s；Control yield strength R of hot-rolled sheet coileL>=400MPa, tensile strength Rm
>=600 MPa, elongation percentage A50≥18%；
3）Cold-rolling process：Control cold rolling accumulative reduction ratio 40 ~ 90%；
4）Carry out blue annealing technique
Therebetween, control：High temperature furnace austenitizing heating-up temperature is at 880 ~ 950 DEG C；Lead-pot furnace annealing temperature is 200 ~ 300
℃；, at 400 ~ 500 DEG C, belt speed is in 5 ~ 7m/min for temperature of turning blue.
Preferably：Temperature of turning blue is at 400 ~ 465 DEG C.
In the present invention, the effect of each element and master operation is as follows：
Carbon（C）
In high-strength binding band steel, carbon has a great impact to the mechanical property of steel, and its tensile strength and hardness all contain with carbon
The increase of amount and increase, but its fragility also increases therewith.The carbon content general control of high-strength binding band steel is 0.03～0.25%
Between.If being less than 0.03%, tie low strength can not meet technical standard and require；If above 0.25%, tie plasticity is relatively
Difference, percentage elongation is low to be also difficult to meet technical standard requirement.
Manganese（Mn）
Manganese belongs to beneficial element in tie steel, can improve the tensile strength of tie, the raising quenching degree of appropriateness, and both
Improve toughness and improve cold-rolling workability energy again.Manganese is also that the element as deoxidation sulphur removal adds, and can improve the deoxidation of silicon and aluminum
Effect, can combine to form Manganese monosulfide. with sulfur simultaneously, so that red brittleness that sulfur causes and cold brittleness is minimized.High-strength binding band is used
The manganese content general control of steel is between 0.50～2.50%.If being less than 0.50%, tie low strength can not meet technical bid
Alignment request；If above 2.50%, tie plasticity is poor, and percentage elongation is low to be also difficult to meet technical standard and require.
Silicon（Si）
Silicon is ferritic formation element.It had not only improved A1 temperature but also had improved A3 temperature.Because silicon has graphited effect,
So it is combined as the stabilizer of carbide in steel with manganese, quenching degree, intensity can be improved.But again can not in tie steel
Too high because silicon can make tie steel antioxidation lead to turn blue technique when turn blue effect on driving birds is not good.Preferably Si content be 0.05 ~
0.13%.If being less than 0.05%, not, after heat treatment, intensity is easily low for the quenching degree of tie；If high by 0.2%, may result in bundle
Belt surface turns blue layer thinner thickness it is impossible to meet requirement.
Phosphorus, sulfur（P、S）
Phosphorus in steel, sulfur content are too high to lead to produce Temper brittleness when manufacturing the lead annealing Technology for Heating Processing of tie finished product
Property, because
This need to strictly control phosphorus, sulfur content, improves the degree of purity of steel.In the present invention, phosphorus plays corrosion-resistant effect, therefore
Its content cannot be below 0.01%, but P content nor be higher than 0.10%, otherwise it is easily caused the lead annealing heat of tie finished product
Temper brittleness is produced during process；Preferably P content is 0.01 ~ 0.085%.
If S content is higher than 0.015%, the same with phosphorus, during the lead annealing heat treatment being easily caused tie finished product, produce tempering
Fragility, leads to tie broken belt.
Aluminum（Al）
Aluminum produces into effective small and dispersed thing and inhibiting grain growth with nitrogen or oxygen, can obtain more tiny block ferrum
The intensity of ferritic and pearlite colony raising steel and toughness.Meanwhile, aluminum is also excellent deoxidizer.If less than 0.01% it is impossible to press down
Combinations grain length is greatly it is impossible to improve intensity and the toughness of tie；If above 0.20%, inhibiting grain growth acts on no longer with it
Content increases and increases, and continues interpolation aluminium content role and has no meaning.Als content is therefore controlled to be 0.01 ~ 0.20%.
Titanium（Ti）
Titanium can be combined with N at high temperature, forms the TiN Second Phase Precipitation thing of highly stable tiny Mass, it can lead to
Cross precipitation strength effect increase substantially tie yield strength meet its superhigh intensity require, it can be at a relatively high simultaneously
Control austenite grain size, the crystal grain being also beneficial to weld heat affected zone controls, crystal grain during suppression welding under soaking temperature
Abnormality is grown up, and improves the welding performance of superhigh intensity tie.If being less than 0.05%, TiN second phase of the tiny Mass being formed
Precipitate negligible amounts are it is difficult to meet high-strength binding band intensity requirement；If above 0.20%, excessive titanium can be formed in steel
Larger particles field trash, is easily caused tie broken belt.
The present invention compared with prior art, adds the composition design system of appropriate Ti so as to resist due to employing low C ~ Mn steel
Tensile strength reaches more than 1500MPa.Because after with the addition of appropriate Ti in steel, due to the chemical property of Ti element active so as to
Combine to form nanoscale TiC, TiN and TiCN with C, its as small and dispersed in steel Second Phase Precipitation thing serve critically important
Precipitation strength acts on, and meets the intensity requirement of superhigh intensity tie；Pass through the hot rolling of coupling, cold rolling, Technology for Heating Processing
The superhigh intensity tie that tensile strength reaches 1500MPa can be produced eventually；It can be at a relatively high simultaneously for Ti in tie simultaneously
Control austenite grain size, the crystal grain being also beneficial to weld heat affected zone controls, crystal grain during suppression welding under soaking temperature
Abnormality is grown up, and improves the welding performance of superhigh intensity tie；Meanwhile, the method applied in the present invention lead-pot furnace annealing temperature only has
200～300 DEG C of volatilization temperatures being far below lead, therefore it is not result in lead volatility without causing environmental pollution.Therefore, it has into
This low, better performances and simple process is easy, production efficiency is high, achievable large-scale production and the supply of material, and it is notable to be that enterprise creates
Social benefit and economic benefit.
Brief description
Fig. 1 is the metallographic structure figure of the present invention；
Fig. 2 is Second Phase Precipitation thing figure of the present invention；
Fig. 3 is Second Phase Precipitation thing tem observation figure.
Specific embodiment
Below the present invention is described in detail：
Table 1 is the comparative example of various embodiments of the present invention and comparative example；
Table 2 is the main technologic parameters list of various embodiments of the present invention and comparative example；
Table 3 is various embodiments of the present invention and comparative example performance text list.
Various embodiments of the present invention produce according to following steps：
1）Smelt：Molten iron pretreatment RH application of vacuum inclusions class, wherein：Control into stove molten iron S content
≤0.005%；Vacuum processing time is no less than 15 minutes；In ladle furnace feed CaSi line, feed quantity according to 700 ~ 800 grams/
Ton, wire-feeding velocity is in 250 ~ 300m/min；
2）Carry out controlled rolling and controlled cooling
Therebetween：By heating of plate blank to 1200 ~ 1300 DEG C；Control finishing temperature at 750 ~ 950 DEG C；Coiling temperature is controlled to exist
450~800℃；Control rate of cooling in 5 ~ 30 DEG C/s；Control yield strength R of hot-rolled sheet coileL>=400MPa, tensile strength Rm
>=600 MPa, elongation percentage A50≥18%；
3）Cold-rolling process：Control cold rolling accumulative reduction ratio 40 ~ 90%；
4）Carry out blue annealing technique
Therebetween, control：High temperature furnace austenitizing heating-up temperature is at 880 ~ 950 DEG C；Lead-pot furnace annealing temperature is 200 ~ 300
℃；, at 400 ~ 500 DEG C, belt speed is in 5 ~ 7m/min for temperature of turning blue.
Table 1 present invention and the melting chemical composition of comparative example（wt%）List
Table 2 various embodiments of the present invention and the rolling technological parameter of comparative example（One）
Table 2 various embodiments of the present invention and the rolling technological parameter of comparative example（Two）
Table 3 various embodiments of the present invention and comparative example performance text list
From table 3 it can be seen that the application is simple in composition, in the case that process contamination is relatively light, its finished product tie producing
Tensile strength is above 1500MPa, elongation percentage A50It is not less than 10%, be entirely capable of meeting market required.
Above-described embodiment only most preferably enumerates, and is not the restriction to embodiments of the present invention.
Claims (2)
1. a kind of tie that turns blue of tensile strength >=1500MPa, its component and weight percent content are：C：0.03 ~ 0.24%,
Si：0.05 ~ 0.14%, Mn：0.50 ~ 1.3%, P：0.02 ~ 0.10%, S：0 ~ 0.015%, Als：0.01 ~ 0.20%, Ti：0.07~
0.20%, N：0.004 ~ 0.010%, remaining is Fe and inevitable tramp element.
2. produce a kind of method of the tie that turns blue of tensile strength >=1500MPa, its step：
1）Smelt：Molten iron pretreatment RH application of vacuum inclusions class, wherein：Control into stove molten iron S content≤
0.005%；Vacuum processing time is no less than 15 minutes；In ladle furnace feed CaSi line, feed quantity according to：700 ~ 740 g ton
Or 760 ~ 800 g ton, wire-feeding velocity is in 250 ~ 265m/min or 275 ~ 300m/min；The component of final molten steel and weight percent
Than content it is：C：0.03 ~ 0.24%, Si：0.05 ~ 0.14%, Mn：0.50 ~ 1.3%, P：0.02 ~ 0.10%, S：0 ~ 0.015%, Als：
0.01 ~ 0.20%, Ti：0.07 ~ 0.20%, N：0.004 ~ 0.010%, remaining is Fe and inevitable tramp element；
2）Carry out controlled rolling and controlled cooling
Therebetween：By heating of plate blank to 1200 ~ 1290 DEG C；Control finishing temperature at 751 ~ 950 DEG C；Control coiling temperature 500 ~
800℃；Control rate of cooling in 6 ~ 30 DEG C/s；Control yield strength R of hot-rolled sheet coileL>=400MPa, tensile strength Rm≥600
MPa, elongation percentage A50≥18%；
3）Cold-rolling process：Control cold rolling accumulative reduction ratio 45 ~ 90%；
4）Carry out blue annealing technique
Therebetween, control：High temperature furnace austenitizing heating-up temperature is at 880 ~ 950 DEG C；Lead-pot furnace annealing temperature is at 200 ~ 300 DEG C；Send out
, at 400 ~ 440 DEG C, belt speed is in 5.1 ~ 7m/min for blue annealing temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410480663.8A CN104264048B (en) | 2014-09-19 | 2014-09-19 | Blued packing tape with tensile strength of more than 1500MPa and production method of blued packing tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410480663.8A CN104264048B (en) | 2014-09-19 | 2014-09-19 | Blued packing tape with tensile strength of more than 1500MPa and production method of blued packing tape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104264048A CN104264048A (en) | 2015-01-07 |
| CN104264048B true CN104264048B (en) | 2017-02-15 |
Family
ID=52155620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410480663.8A Active CN104264048B (en) | 2014-09-19 | 2014-09-19 | Blued packing tape with tensile strength of more than 1500MPa and production method of blued packing tape |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104264048B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104726765A (en) * | 2015-02-16 | 2015-06-24 | 唐山钢铁集团有限责任公司 | 1000MPa-grade high-strength cold-rolled packed steel strip and production method thereof |
| CN105256234A (en) * | 2015-10-29 | 2016-01-20 | 首钢总公司 | Low-carbon microalloyed steel, preparing method and application of low-carbon microalloyed steel, ventilator blade and ventilator |
| CN110263375B (en) * | 2019-05-20 | 2023-04-07 | 武汉钢铁有限公司 | Method for predicting breakage of binding band of hot-rolled steel coil |
| CN112322973A (en) * | 2020-10-19 | 2021-02-05 | 攀钢集团攀枝花钢铁研究院有限公司 | Wet environment corrosion-resistant steel rail and production method thereof |
| CN112899561A (en) * | 2021-01-14 | 2021-06-04 | 山东钢铁集团日照有限公司 | Production method of low-cost high-titanium high-crack-resistance X70 pipeline steel hot-rolled coil |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383031A (en) * | 2011-10-28 | 2012-03-21 | 武汉钢铁(集团)公司 | High-strength binding band and production method thereof |
| CN103757536A (en) * | 2014-01-24 | 2014-04-30 | 宝山钢铁股份有限公司 | Thin strip continuous casting economic high-strength binding strip with tensile strength of at least 1100 MPa and manufacturing method thereof |
-
2014
- 2014-09-19 CN CN201410480663.8A patent/CN104264048B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383031A (en) * | 2011-10-28 | 2012-03-21 | 武汉钢铁(集团)公司 | High-strength binding band and production method thereof |
| CN103757536A (en) * | 2014-01-24 | 2014-04-30 | 宝山钢铁股份有限公司 | Thin strip continuous casting economic high-strength binding strip with tensile strength of at least 1100 MPa and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 钢铁发蓝工艺研究;黄菲等;《武汉工程职业技术学院学报》;20100630;第22卷(第2期);第14-17页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104264048A (en) | 2015-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110565016B (en) | 630MPa high-strength anti-seismic index reinforcing steel bar and production method thereof | |
| CN104264048B (en) | Blued packing tape with tensile strength of more than 1500MPa and production method of blued packing tape | |
| CN101376944B (en) | High-strength high-tensile ratio cold-rolled steel sheet and manufacturing method thereof | |
| CN102965574B (en) | Titanium microalloying hot-rolling thick steel plate with low yield ratio and high strength and production process of steel plate | |
| CN111088451A (en) | 600 MPa-level steel bar for reinforced concrete and production method thereof | |
| CN103451535B (en) | A kind of 510MPa level automotive frame hot continuous rolling Strip and production technique thereof | |
| CN109957712A (en) | A kind of soft X70M line steel hot rolling coiled sheet and its manufacturing method | |
| CN102383031A (en) | High-strength binding band and production method thereof | |
| CN112226676B (en) | Low-cost L320MS/X46MS hot-rolled steel strip for hydrogen sulfide corrosion resistant welded pipe and manufacturing method thereof | |
| CN102505096A (en) | Steel with good property and ultra-high strength for engineering machinery and manufacturing method thereof | |
| CN114686762B (en) | Production method of high-strength high-toughness hot continuous rolling thin steel plate with Brinell hardness of 500HBW | |
| CN102828124A (en) | Non-quenched/tempered heavy plate for low-temperature pressure vessel and production method thereof | |
| JP2015124442A (en) | Steel material for pressure vessel excellent in low temperature toughness and hydrogen sulfide stress corrosion cracking resistance, method for producing the same, and method for producing deep-drawn product therefrom | |
| CN101760702B (en) | High-strength anti-fatigue atmospheric corrosion resistant hot-rolled steel strip and method for producing same | |
| CN114934156A (en) | Production method of high-strength and high-toughness hot continuous rolling thin steel plate with Brinell hardness of 450HBW | |
| CN106636894A (en) | Low carbon ferrite soft magnetic free-cutting stainless steel and production method thereof | |
| CN103757536A (en) | Thin strip continuous casting economic high-strength binding strip with tensile strength of at least 1100 MPa and manufacturing method thereof | |
| CN111893401A (en) | L450MS pipeline steel with excellent SSCC resistance under high loading stress and manufacturing method thereof | |
| JP2009263772A (en) | METHOD FOR MANUFACTURING THICK HIGH-TENSILE STRENGTH STEEL PLATE HAVING EXCELLENT WELDABILITY AND LOW-TEMPERATURE JOINT TOUGHNESS AND TENSILE STRENGTH OF AT LEAST 780 MPa | |
| CN103757533A (en) | Thin strip continuous casting economic high-strength binding strip with tensile strength of at least 1000 MPa and manufacturing method thereof | |
| CN114990432B (en) | Hot rolled strip steel with tensile strength not lower than 1500MPa produced by TSR production line and method | |
| CN101463449A (en) | 640-800Mpa high strength steel for engineering machinery and production method thereof | |
| CN113481429A (en) | High-strength bluing bundled steel with tensile strength greater than 980MPa and manufacturing method thereof | |
| CN104233081A (en) | Production technology of high-strength binding tape | |
| CN114737136B (en) | Production method of high-strength high-toughness hot continuous rolling thin steel plate with Brinell hardness of 400HBW |
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 |