CN106282778A - Ultra-fine grain steel Ribbed Bar wire rod and production technology thereof - Google Patents
Ultra-fine grain steel Ribbed Bar wire rod and production technology thereof Download PDFInfo
- Publication number
- CN106282778A CN106282778A CN201610828690.9A CN201610828690A CN106282778A CN 106282778 A CN106282778 A CN 106282778A CN 201610828690 A CN201610828690 A CN 201610828690A CN 106282778 A CN106282778 A CN 106282778A
- Authority
- CN
- China
- Prior art keywords
- wire rod
- ultra
- ribbed bar
- fine grain
- bar wire
- 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.)
- Pending
Links
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- 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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention relates to a kind of ultra-fine grain steel Ribbed Bar wire rod and production technology thereof；The percentage by weight chemical composition of this ultra-fine grain steel Ribbed Bar wire rod is: C:0.21% 0.24%, Mn:0.60% 1.30%, Si:0.15% 0.50%, P≤0.035%, S≤0.035%, and surplus is ferrum and inevitable impurity；Production technology uses whole process low temperature rolling, and laying temperature controls, at 650 DEG C～720 DEG C, the admission pressure of pinch roll to be adjusted to 7.0～8.0 bar, the chucking power of pinch roll is adjusted to 5.0～7.0bar；The present invention uses TMCP process to produce ultra-fine grain steel Ribbed Bar wire rod；Uniformly, oxidization burning loss is few, saves the energy, saves material, and production cost is low in the Ribbed Bar wire rod crystal grain refinement that this process is produced.
Description
Technical field
The invention belongs to metallurgical technology field, particularly relate to a kind of ultra-fine grain steel Ribbed Bar wire rod and production technology thereof.
Background technology
Before Laying head, pinch roll is the key equipment of metallurgy industry high-speed wire production line, it be responsible for by finished wire rod from
Milling train imports the critical function of Laying head smoothly；This device is mainly used in small dimension tail brake with big when producing round steel wire
Specification pinches.
When producing Ribbed Bar wire rod under the conditions of being not less than 750 DEG C of high temperature and weaving silk, owing to rolling, rear temperature drop is little, wear the water yield
Little, thus it is little to wear water resistance, can realize steady production by the conventional technology that pinches；But weaving silk technique less than 720 DEG C of low temperature
Under the conditions of when producing Ribbed Bar wire rod, owing to rolling, rear temperature drop is big, it is big to wear the water yield, thus it is big to wear water resistance, pinches with conventional
Technology is not provided that enough power, wears water resistance to offset, thus the most just cannot realize normally producing.
The most above-mentioned reason, produces Ribbed Bar wire rod the most both at home and abroad and all uses the high temperature higher than 750 DEG C of laying temperatures
Weaving silk technology, this results in: cannot with the common straightcarbon steel without any microalloy element Nb, V, Ti produce 400MPa level,
500 MPa level Ribbed Bar, it is impossible to produce 460 MPa levels with the common straightcarbon steel without any microalloy element Nb, V, Ti
The similar products such as English marker tape rib reinforcement, can only take add microalloy element Nb, V, Ti or increase the way of Mn, Si intensified element
Improve intensity, realize the high strength steels such as 400MPa level, 500 Mpa level Ribbed Bar and 460 MPa level English mark spirals
The production of muscle；And use and add microalloy element Nb, V, Ti or increase the way of Mn, Si intensified element to improve the strong of reinforcing bar
Degree, makes complex manufacturing, the cost of increase reinforcing bar.
Abroad, the state such as American-European mainly uses and rolls rear immediate quenching technique and improve steel strength；The product that this technique produces
Reduce compared with alloy strengthening product plasticity, welding performance is poor, strong flexor ratio is the highest；In China, this kind of steel are mainly used in building, by
In the steel that immediate quenching technique produces, its welding performance is poor, can only use mechanical connection, and China is in earthquake frequency during construction
Sending out district, in engineering construction, reinforcing bar great majority use welded connection technology, the product that therefore immediate quenching technique produces to be difficult at me
State's popularization and application.
In architectural engineering, improve the rank of reinforcing bar, the usage amount of reinforcing bar can be efficiently reduced, decrease steel bar welding simultaneously
Connect, the workload such as prefabricated and transport, be conducive to improving the mobility of concrete, improve work efficiency, thus be effectively reduced
Building cost.
Summary of the invention
The present invention is the production technology of a kind of ultra-fine grain steel Ribbed Bar wire rod, and it is by pinching before improving Laying head
The power of roller and chucking power；I.e. before Laying head, be >=650～＜ 720 DEG C of laying temperatures entering the temperature of pinch roll, niproll
The supply gas pressure of entrance is >=7bar, and the chucking power of pinch roll is 5.0～7.0bar, can without microalloy element Nb, V,
In the case of Ti, and high strength ribbed reinforced bar wire rod can be produced under >=650～＜ 720 DEG C of low temperature weave silk process conditions.
The present invention is by the following technical solutions:
The production technology of ultra-fine grain steel Ribbed Bar wire rod, is C:0.21-0.24%, Mn:0.60-including selecting chemical composition
1.30%, Si:0.15-0.50%, P≤0.035%, the steel billet of S≤0.035%, it is heated to 900～1000 DEG C, at high line roughing mill
Upper start rolling temperature is 900～1000 DEG C；Milling train, pre-finishing mill, finishing mill, reducing sizing mill in high line, laying temperature controls
650～720 DEG C, the admission pressure of pinch roll is adjusted to 7.0～8.0 bar, the chucking power of pinch roll is adjusted to 5.0～
7.0bar, just can produce 400MPa-500 MPa level Ф 6-Ф 8 mm English marker tape rib reinforcement；Described Ribbed Bar wire rod
Percentage by weight chemical composition is: C:0.21-0.24%, Mn:0.60-1.30%, Si:0.15-0.50%, P≤0.035%, S≤
0.035%, surplus is Fe and inevitable impurity.
Described ultra-fine grain steel Ribbed Bar wire rod is by weight percentage by following elementary composition: C:0.21～0.23%,
Mn:0.60-1.05%, Si:0.15-0.50%, S≤0.035%, P≤0.035%, remaining is Fe and inevitable impurity.
Described ultra-fine grain steel Ribbed Bar wire rod is by weight percentage by following elementary composition: C:0.22-0.24%,
Mn1.0-1.30%、Si0.15-0.30%、P≤0.035%、S≤0.035%；Remaining is Fe and inevitable impurity.
Described ultra-fine grain steel Ribbed Bar wire rod is by weight percentage by following elementary composition: C:0.21-0.23%, Mn:
0.70-1.10%, Si:0.20-0.45%, P≤0.035%, S≤0.035%；Remaining is Fe and inevitable impurity.
The method have the advantages that
Due to the fact that the supply gas pressure increasing niproll, the chucking power of niproll just can raise, and provides enough for pinching
Power, just can meet >=650～＜ 720 DEG C of low temperature and weave silk the needs of production Ribbed Bar wire rod under process conditions；Separately due to
Can use >=650～＜ 720 DEG C of low temperature weave silk, the heating-up temperature that can be produced by former tradition reinforcing bar be 1000～1200 DEG C and drop to add
Hot temperature is 900～1000 DEG C, and under this heating-up temperature, its austenite achieves homogenization, austenite crystal within a short period of time
Grain is not roughened yet, and oxidization burning loss is few, has saved the energy, has saved raw material, and production cost is substantially reduced；Therefore, present invention tool
Have and can produce high strength ribbed reinforced bar wire rod in the case of without microalloy element Nb, V, Ti；Crystal grain refinement is uniform, oxygen
Change scaling loss few, save the energy, save material, the features such as production cost is low.The usage amount of reinforcing bar, minimizing is reduced for architectural engineering
The workloads such as reinforcement welding, prefabricated and transport, improve construction quality and work efficiency；Create for being effectively reduced building cost
Condition.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the invention will be further described, but the present invention is not limited to this；
The production technology of ultra-fine grain steel Ribbed Bar wire rod, is C:0.21-0.24%, Mn:0.60-including selecting chemical composition
1.30%, Si:0.15-0.50%, P≤0.035%, the steel billet of S≤0.035%, it is heated to 900～1000 DEG C, at high line roughing mill
Upper start rolling temperature is 900～1000 DEG C；Milling train, pre-finishing mill, finishing mill, reducing sizing mill in high line, laying temperature controls
650～720 DEG C, the admission pressure of pinch roll is adjusted to 7.0～8.0 bar, the chucking power of pinch roll is adjusted to 5.0～
7.0bar, just can produce 400MPa-500MPa level Ф 6-Ф 8 mm English marker tape rib reinforcement；The weight of described Ribbed Bar wire rod
Amount percentage ratio chemical composition is: C:0.21-0.24%, Mn:0.60-1.30%, Si:0.15-0.50%, P≤0.035%, S≤
0.035%, surplus is Fe and inevitable impurity.
Embodiment one, rolling ultra-fine grain steel HRB400Mpa Ф 6mm level Ribbed Bar wire rod:
Selecting chemical composition is C:0.21～0.23%, Mn:0.60-1.05%, Si:0.15-0.50%, S≤0.035%, P≤
The steel billet of 0.035%, is heated to 900 DEG C, and on high line roughing mill, start rolling temperature is 900 DEG C；In high line milling train, pre-finishing mill,
Finishing mill, reducing sizing mill, laying temperature controls, at 710 DEG C, the admission pressure of pinch roll to be adjusted to 7.0bar, by pinch roll
Chucking power is adjusted to 5.0bar, just can produce the Ribbed Bar wire rod of HRB400MPa Ф 6mm level.
The mass parameter of above-mentioned HRB400MPa Ф 6mm level Ribbed Bar wire rod is: grain size 12 grades-13 grades, yield strength
420MPa-480MPa, tensile strength 560Mpa-650Mpa, percentage elongation 25%-35%.
Embodiment two, rolling ultra-fine grain steel HRB500MPa Ф 8mm level Ribbed Bar wire rod:
Selection chemical composition is C:0.22-0.24%, Mn:1.0-1.30%, Si:0.15-0.30%, P≤0.035%, S≤0.035%
Steel billet, be heated to 950 DEG C, on high line roughing mill, start rolling temperature is 950 DEG C；Milling train, pre-finishing mill, finish rolling in high line
Machine, reducing sizing mill, laying temperature controls, at 650 DEG C, the admission pressure of pinch roll to be adjusted to 8.0 bar, by the folder of pinch roll
Holding force is adjusted to 7.0bar, just can produce the Ribbed Bar wire rod of HRB500MPa Ф 8mm level.
The mass parameter of above-mentioned HRB500MPa Ф 8mm level Ribbed Bar wire rod is: grain size 11 grades-12 grades, yield strength
520MPa-580MPa, tensile strength 660MPa-730MPa, percentage elongation 20%-30%.
Embodiment three, rolling ultra-fine grain steel 460 MPa level Ф 8 mm English marker tape rib reinforcement wire rod:
Selection chemical composition is C:0.21-0.23%, Mn:0.70-1.10%, Si:0.20-0.45%, P:0.025%, S:0.025%
Steel billet, be heated to 1000 DEG C, on high line roughing mill, start rolling temperature is 1000 DEG C；Milling train, pre-finishing mill, finish rolling in high line
Machine, reducing sizing mill, laying temperature controls, at 680 DEG C, the admission pressure of pinch roll to be adjusted to 7.5 bar, by the folder of pinch roll
Holding force is adjusted to 6.0bar, just can produce 460 MPa level Ф 8 mm English marker tape rib reinforcements.
The mass parameter of above-mentioned 460 MPa level Ф 8 mm level Ribbed Bar wire rods is: grain size 11 grades-12 grades, and surrender is strong
Degree 480Mpa-540MPa, tensile strength 620MPa-700MPa, percentage elongation 22%-32%.
Therefore, the present invention, by increasing the admission pressure of pinch roll, improves the chucking power of pinch roll, to meet low temperature
The power needs of Ribbed Bar wire rod are produced under process conditions of weaving silk；Another owing to reducing the temperature weaved silk, it is possible to reduce steel billet
Heating-up temperature, dropped to 900～1000 DEG C by original 1000～1200 DEG C, one is can significantly to reduce energy consumption, saves
The energy；Two is the coarse grains that can stop austenite recrystallization, makes the crystal grain of product more refine, more uniform, thus reaches
Improve the purpose of product strength；Therefore, the present invention has and can produce height in the case of without microalloy element Nb, V, Ti
Intensity band rib reinforcement wire rod；Uniformly, oxidization burning loss is few in crystal grain refinement, saves the energy, saves material, and production cost is low waits spy
Point；Reduce the usage amount of reinforcing bar for architectural engineering, reduce the workloads such as reinforcement welding, prefabricated and transport, improve construction quality
And work efficiency；Condition is created for being effectively reduced building cost.
In addition to the implementation, the present invention can also have other embodiments, all employing equivalents or equivalent transformation shape
The technical scheme become, all falls within the protection domain of application claims.
Claims (4)
1. the production technology of ultra-fine grain steel Ribbed Bar wire rod, is C:0.21%-0.24%, Mn including selecting chemical composition:
0.60%-1.30%, Si:0.15%-0.50%, P≤0.035%, the steel billet of S≤0.035%, it is heated to 900 DEG C～1000 DEG C, at height
On line roughing mill, start rolling temperature is 900 DEG C～1000 DEG C；In high line, milling train, pre-finishing mill, finishing mill, reducing sizing mill, weave silk
Temperature controls, at 650 DEG C～720 DEG C, the admission pressure of pinch roll to be adjusted to 7.0～8.0 bar, by the chucking power of pinch roll
It is adjusted to 5.0～7.0bar, just can produce 400-500 Mpa level Ф 6-Ф 8 mm English marker tape rib reinforcement English marker tape rib reinforcement；
The percentage by weight chemical composition of described Ribbed Bar wire rod is: C:0.21%-0.24%, Mn:0.60%-1.30%, Si:0.15%-
0.50%, P≤0.035%, S≤0.035%, surplus is Fe and inevitable impurity.
2. the production technology of ultra-fine grain steel Ribbed Bar wire rod as claimed in claim 1, it is characterised in that: described band rib steel
Muscle wire rod is by weight percentage by following elementary composition: C:0.21%～0.23%, Mn:0.60%-1.05%, Si:0.15%-
0.50%, S≤0.035%, P≤0.035%, remaining is Fe and inevitable impurity.
3. the production technology of ultra-fine grain steel Ribbed Bar wire rod as claimed in claim 1, it is characterised in that: described band rib steel
Muscle wire rod is by weight percentage by following elementary composition: C:0.22%-0.24%, Mn1.0%-1.30%, Si0.15%-0.30%, P≤
0.035%, S≤0.035%, remaining is Fe and inevitable impurity.
4. the production technology of ultra-fine grain steel Ribbed Bar wire rod as claimed in claim 1, it is characterised in that: described band rib steel
Muscle wire rod is by weight percentage by following elementary composition: C:0.21%-0.23%, Mn:0.70%-1.10%, Si:0.20%-0.45%,
P≤0.025%, S≤0.025%, remaining is Fe and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610828690.9A CN106282778A (en) | 2016-09-19 | 2016-09-19 | Ultra-fine grain steel Ribbed Bar wire rod and production technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610828690.9A CN106282778A (en) | 2016-09-19 | 2016-09-19 | Ultra-fine grain steel Ribbed Bar wire rod and production technology thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106282778A true CN106282778A (en) | 2017-01-04 |
Family
ID=57712036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610828690.9A Pending CN106282778A (en) | 2016-09-19 | 2016-09-19 | Ultra-fine grain steel Ribbed Bar wire rod and production technology thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106282778A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107675076A (en) * | 2017-09-21 | 2018-02-09 | 上海宝钢包装钢带有限公司 | A kind of high-intensity packing steel band and its processing method |
| CN109092891A (en) * | 2018-07-12 | 2018-12-28 | 石横特钢集团有限公司 | The production method of 400Mpa grades of ultra-fine grain steel Ribbed Bar wire rods |
| CN112226682A (en) * | 2020-09-22 | 2021-01-15 | 石横特钢集团有限公司 | Titanium microalloying production process for deformed steel bar |
| CN114000051A (en) * | 2021-09-29 | 2022-02-01 | 武钢集团昆明钢铁股份有限公司 | Ultra-fine grain HRB400E wire rod anti-seismic steel bar and preparation method thereof |
| CN114318141A (en) * | 2021-12-14 | 2022-04-12 | 石横特钢集团有限公司 | Production process of high-performance smooth steel bar |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01123034A (en) * | 1987-11-05 | 1989-05-16 | Kawasaki Steel Corp | Method and apparatus for directly heat-treating hot-rolled wire rod |
| CN1745918A (en) * | 2004-09-07 | 2006-03-15 | 安阳钢铁集团有限责任公司 | Production of ultra-fine crystal hot-rolled ribbed reinforcing rob |
| CN101015839A (en) * | 2007-02-14 | 2007-08-15 | 山东石横特钢集团有限公司 | Laying head front nip and feed technique for producing wire roll with high speed under low temperature |
| CN101185938A (en) * | 2006-11-09 | 2008-05-28 | 钢铁研究总院 | Method for producing steel bar with rib |
-
2016
- 2016-09-19 CN CN201610828690.9A patent/CN106282778A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01123034A (en) * | 1987-11-05 | 1989-05-16 | Kawasaki Steel Corp | Method and apparatus for directly heat-treating hot-rolled wire rod |
| CN1745918A (en) * | 2004-09-07 | 2006-03-15 | 安阳钢铁集团有限责任公司 | Production of ultra-fine crystal hot-rolled ribbed reinforcing rob |
| CN101185938A (en) * | 2006-11-09 | 2008-05-28 | 钢铁研究总院 | Method for producing steel bar with rib |
| CN101015839A (en) * | 2007-02-14 | 2007-08-15 | 山东石横特钢集团有限公司 | Laying head front nip and feed technique for producing wire roll with high speed under low temperature |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107675076A (en) * | 2017-09-21 | 2018-02-09 | 上海宝钢包装钢带有限公司 | A kind of high-intensity packing steel band and its processing method |
| CN109092891A (en) * | 2018-07-12 | 2018-12-28 | 石横特钢集团有限公司 | The production method of 400Mpa grades of ultra-fine grain steel Ribbed Bar wire rods |
| CN109092891B (en) * | 2018-07-12 | 2020-01-03 | 石横特钢集团有限公司 | Production method of 400Mpa grade superfine crystal grain steel ribbed steel bar wire rod |
| CN112226682A (en) * | 2020-09-22 | 2021-01-15 | 石横特钢集团有限公司 | Titanium microalloying production process for deformed steel bar |
| CN114000051A (en) * | 2021-09-29 | 2022-02-01 | 武钢集团昆明钢铁股份有限公司 | Ultra-fine grain HRB400E wire rod anti-seismic steel bar and preparation method thereof |
| CN114000051B (en) * | 2021-09-29 | 2022-05-10 | 武钢集团昆明钢铁股份有限公司 | Ultra-fine grain HRB400E wire rod anti-seismic steel bar and preparation method thereof |
| CN114318141A (en) * | 2021-12-14 | 2022-04-12 | 石横特钢集团有限公司 | Production process of high-performance smooth steel bar |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106282778A (en) | Ultra-fine grain steel Ribbed Bar wire rod and production technology thereof | |
| CN100513614C (en) | High-strength rebar and manufacturing process thereof | |
| CN104451410B (en) | Steel for 600MPa-level high-strength steel bars and thermal mechanical rolling method thereof | |
| CN101407894A (en) | High strength X100 pipeline steel produced by steekle mill and production technique thereof | |
| CN103643143B (en) | A kind of 600MPa level Green heat treatment high strength cast iron and working method thereof | |
| CN101613828A (en) | Super-thick steel plate for low yield ratio buildings with 460 MPa grade yield strength and manufacture method | |
| CN102277539A (en) | High-strength steel with low yield ratio, high plasticity and ultrafine grain and preparation method thereof | |
| CN101007316A (en) | Method for producing niobium-contained HRB400 grade reinforcing steel | |
| CN106756556A (en) | Korea Spro marks SD400 spirals with ribbing and its production method | |
| CN103233161A (en) | Low-yield-ratio high-strength hot-rolled Q&P steel and manufacturing method thereof | |
| CN106756618A (en) | 100mm thickness Q420GJCD controlled rolling state high-strength structure steel plates | |
| CN102061370A (en) | Production process of rebar for concrete | |
| CN111570537B (en) | Hot rolling process for improving strength and fracture toughness of steel bar | |
| CN104988409A (en) | Non-annealed cold forging steel hot-rolled wire rod and production method thereof | |
| CN114411061B (en) | High-strength anti-seismic steel bar and preparation method thereof | |
| CN112239830A (en) | Low-cost high-ductility disc strip for CRB600H and rolling process thereof | |
| CN105886912B (en) | A kind of low compression ratio think gauge X70 levels steel for gas delivering pipeline and production method | |
| CN102643970A (en) | Production method of hot-rolled ribbed bar coil | |
| CN102828117A (en) | Low-yield ratio high-intensity hot-rolled double-phase steel plate and production method thereof | |
| CN101928884B (en) | X52 pipeline steel and production method thereof | |
| CN114058944B (en) | Q500 steel grade low-alloy structural steel bar and controlled rolling and controlled cooling rolling method thereof | |
| CN109092891A (en) | The production method of 400Mpa grades of ultra-fine grain steel Ribbed Bar wire rods | |
| CN104561490B (en) | A kind of high hot-rolled ribbed anti-seismic steel bar of line small dimension coils cooling control after rolling method | |
| CN104561781B (en) | A kind of Q460 level shock resisting steel and the method producing Q460 level shock resisting steel with steekle mill | |
| CN104073744B (en) | The high tenacity X80 pipe line steel coiled sheet of thickness >=18.5mm and production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information |
Address after: 271612 Feicheng City, Shandong Province Shi Heng Town Applicant after: Shiheng Special Steel Group Co., Ltd. Address before: 271612 Feicheng City, Shandong Province Shi Heng Town Applicant before: Shandong Shiheng Special Steel Group Co., Ltd. |
|
| COR | Change of bibliographic data | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170104 |