CN107447164A - A kind of anti-seismic steel bar and its production technology - Google Patents
A kind of anti-seismic steel bar and its production technology Download PDFInfo
- Publication number
- CN107447164A CN107447164A CN201710577584.2A CN201710577584A CN107447164A CN 107447164 A CN107447164 A CN 107447164A CN 201710577584 A CN201710577584 A CN 201710577584A CN 107447164 A CN107447164 A CN 107447164A
- Authority
- CN
- China
- Prior art keywords
- steel bar
- rolling
- seismic steel
- seismic
- production technology
- 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
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master 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
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
Abstract
The present invention proposes a kind of anti-seismic steel bar, and the anti-seismic steel bar is HRB400E high-strength anti-seismic steel bars, according to percentage by weight, including following component：C：0.20 0.25%, Si：0.30 0.40%, Mn：1.20 1.30%, Ti：0.01 0.02%, V：0.015 0.023%, remaining is Fe；Control impurity content：S≤0.045%, P≤0.045%, the percentage by weight sum of each component is 100%.Its production technology is：Converter smelting Argon continuous casting heating rolling cooling cold shears scale, which is examined, collects storage.The present invention reduces V addition, the anti-seismic performance of reinforcing bar is improved while reducing production cost by adding Ti and controlled rolling technique.
Description
Technical field
The present invention relates to construction(al)steel technical field, particularly a kind of anti-seismic steel bar and its production technology.
Background technology
Anti-seismic steel bar used has very important relation, thus anti-seismic steel bar in the anti-seismic performance and concrete of building
Cause the highest attention of professional.Contain N in reinforcing bar, active N has strain-aging, reinforcing bar can be lost with the time
Go toughness and brittle, anti-seismic performance variation.V is added into reinforcing bar in the prior art, V can combine to form precipitation with active N
Speed is fast, the spread is small, Precipitation Temperature is low, precipitation particle is thin and is not easy the VN of agglomeration.V and N combination, is served
The effect of precipitation N and reinforced concrete-bar well so that the hardness of steel finally prepared is high, stable performance.But V is expensive,
In order to reduce V addition, prior art uses cooling control after rolling (880 ± 20 DEG C of temperature on cooling table) technology, with reinforcing steel bar
, production cost can be reduced, but rolling rear rapid cooling causes the increase rate of HRB400E reinforcement yielding intensity to be more than carrying for tensile strength
High-amplitude, and then cause R ° of m/R ° of eL of strong flexor ratio to be less than 1.25, do not meet the requirement of anti-seismic steel bar.How a kind of new resist is designed
The processing technology of reinforcing bar is shaken, while reducing V addition, reducing production cost, is unlikely to influence the anti-seismic performance of reinforcing bar,
It is the current technical issues that need to address.
The content of the invention
In order to solve the above technical problems, the present invention propose that a kind of production cost is low, anti-seismic performance is good and production technology more
Simple anti-seismic steel bar.
The technical proposal of the invention is realized in this way：
A kind of anti-seismic steel bar, anti-seismic steel bar are HRB400E high-strength anti-seismic steel bars, according to percentage by weight, including it is as follows
Component：C：0.20-0.25%, Si：0.30-0.40%, Mn：1.20-1.30%, Ti：0.01-0.02%, V：0.015-
0.023%, remaining is Fe；Control impurity content：S≤0.045%, P≤0.045%, the percentage by weight sum of each component are
100%.
Principle explanation：Roll the raising that rear rapid cooling is improved compared to tensile strength to the yield strength of reinforcing bar and want more, and then cause
R ° of m/R ° of eL of strong flexor ratio is less than 1.25；Ti is added in the micro alloyed steel containing Nb and V, Nb and V precipitation can be changed, and causes to bend
Intensity decreases are taken, therefore the technical program addition microalloy Ti can make up and roll yield strength raising width of the rear rapid cooling to reinforcing bar
Degree meets the requirement that R ° of m/R ° of eL of reinforcing bar strong flexor ratio is more than 1.25 more than the increase rate of tensile strength.In addition, microalloy element
Ti can be combined into carbide, nitride strongly with carbon, nitrogen, and these compounds dissolve, separated out at low temperature at high temperature, by not
The particle of desired size can be obtained with technology controlling and process, these particles effectively can prevent crystal grain from growing up, the performance of its interception
：1. original austenite grains are prevented to grow up during heating；2. recrystal grain is hindered to grow up in the operation of rolling；3. played during low temperature
Precipitation strength acts on.
Preferably, the institutional framework of reinforcing bar is pearlite+sorbite+a small amount of ferrite, and wherein pearlitic grain degree is
9.5-11 level.
It is more highly preferred to, the strong flexor ratio of reinforcing bar：1.28 ＜ R ° m/R ° eL ＜ 1.31.
The present invention also proposes the production technology of above-mentioned anti-seismic steel bar, and its technological process is：Converter smelting-Argon-continuous casting pours
Note-heating-rolling-cooling-cold shears scale-inspection-collection-storage.
Preferably, Si, Mn, Ti, V are added in the form of ferrosilicon, ferromanganese, ferrotianium, vanadium iron respectively during converter smelting, and converter goes out
Be uniformly added into deoxidier sial calcium 0.5kg/t or carborundum 1.0-1.2kg/t during steel 1/4, during tapping 2/3 addition finish；Turn
Start to add ferrosilicon, ferromanganese during stove tapping 1/3, finished to addition during tapping 2/3, add vanadium iron and ferrotianium afterwards；Tap 1/3 when
Ature of coal carburant is added with steel stream.
It is further preferred that rolling include roughing, in roll and finish rolling, in roll after elder generation wear water finish rolling again in advance, carried out after finish rolling
Weak to wear water, rolling specs are Φ 16- Φ 28.
It is more highly preferred to, 1080 ± 30 DEG C of start rolling temperature during rolling, 950 ± 30 DEG C of final rolling temperature.
Compared with prior art, the present invention has the advantages that：
1st, steel bar quality is excellent, anti-seismic performance is good, the ＜ R ° m/R ° eL ＜ 1.31 of strong flexor ratio 1.28 of reinforcing bar, fully meets anti-
Shake the requirement of reinforcing bar；
2nd, reasonable mixture ratio, production cost are low, by adding appropriate Ti, reduce V addition, reduce anti-seismic steel bar
Production cost；
3rd, simple production process, easy to operate, on the basis of each component proportion is accurately controlled, passes through the work of controlled rolling
Skill parameter, you can effectively improve the anti-seismic performance of reinforcing bar, realize the steady production of anti-seismic steel bar.
Embodiment
Technical scheme is clearly and completely described below in conjunction with embodiment, it is clear that described reality
It is only part of the embodiment of the present invention to apply example, rather than whole embodiments.It is general based on the embodiment in the present invention, this area
The every other embodiment that logical technical staff is obtained under the premise of creative work is not made, belong to what the present invention protected
Scope.
Embodiment 1
Match somebody with somebody according to following quality proportioning and take various raw materials：
C：0.20%, Si：0.40%, Mn：1.20%, Ti：0.02%, V：0.015%, remaining is Fe.
Above-mentioned raw materials are produced according to following process：
Converter smelting (tapping temperature is 1680 DEG C)-Argon (is opened argon gas before converter tapping, converter tapping whole process is blown
Argon, 2min, soft blow 5min are blown by force, temperature is 1580 DEG C after argon)-continuous casting-heating-rolling-cooling-cold shears scale-inspection-
Collection-storage.
Wherein, it is uniformly added into deoxidier sial calcium 0.5kg/t in converter smelting during converter tapping 1/4, adds during tapping 2/3
Finish；Start to add ferrosilicon, ferromanganese during converter tapping 1/3, finished to addition during tapping 2/3, add vanadium iron and ferrotianium afterwards；Go out
During steel 1/3 ature of coal carburant is added with steel stream；
Wherein, rolling include roughing, in roll and finish rolling, first 1# cutting heads roll in carrying out again after roughing, in roll after elder generation wear in advance
Finish rolling again after water, 2# cutting heads, carry out weak wearing water and 3# cuts multiple length after finish rolling；Rolling specs are Φ 20, start rolling temperature during rolling
1080 DEG C, 950 DEG C of final rolling temperature；
Wherein, it is cooled on cold bed and carries out, temperature on cooling table is 880 DEG C.
Remaining NM technological parameter uses prior art.
After tested：The structure of anti-seismic steel bar made from the present embodiment is pearlite+sorbite+a small amount of ferrite, should
The strong flexor ratio 1.29 on reinforcing bar head, pearlitic grain degree are 9.5-11 levels, and the strong flexor ratio 1.31 at middle part, pearlitic grain degree are
9.5-10 levels, the strong flexor ratio 1.28 of afterbody, pearlitic grain degree are 10-11 levels.Without adding Ti, remaining component proportion identical
The strong flexor ratio 1.25 on the reinforcing bar head of comparative example, pearlitic grain degree are 8-9 levels, the strong flexor ratio 1.27 at middle part, pearlitic grain
It is 8.5-9.5 levels to spend for 8-8.5 levels, the strong flexor ratio 1.23 of afterbody, pearlitic grain degree.
Embodiment 2
Match somebody with somebody according to following quality proportioning and take various raw materials：
C：0.25%, Si：0.30%, Mn：1.30%, Ti：0.01%, V：0.023%, remaining is Fe.
Above-mentioned raw materials are produced according to following process：
Converter smelting (tapping temperature is 1685 DEG C)-Argon (is opened argon gas before converter tapping, converter tapping whole process is blown
Argon, 2min, soft blow 5min are blown by force, temperature is 1575 DEG C after argon)-continuous casting-heating-rolling-cooling-cold shears scale-inspection-
Collection-storage.
Wherein, deoxidier sial calcium carborundum 1.0-1.2kg/t is uniformly added into converter smelting during converter tapping 1/4, is gone out
Addition finishes during steel 2/3；Start to add ferrosilicon, ferromanganese during converter tapping 1/3, finished to addition during tapping 2/3, add vanadium afterwards
Iron and ferrotianium；Tap 1/3 when with steel stream add ature of coal carburant；
Wherein, rolling include roughing, in roll and finish rolling, first 1# cutting heads roll in carrying out again after roughing, in roll after elder generation wear in advance
Finish rolling again after water, 2# cutting heads, carry out weak wearing water and 3# cuts multiple length after finish rolling；Rolling specs are Φ 20, start rolling temperature during rolling
1050 DEG C, 920 DEG C of final rolling temperature；
Wherein, it is cooled on cold bed and carries out, temperature on cooling table is 900 DEG C.
Remaining NM technological parameter uses prior art.
After tested：The structure of anti-seismic steel bar made from the present embodiment is pearlite+sorbite+a small amount of ferrite, should
The strong flexor ratio 1.29 on reinforcing bar head, pearlitic grain degree are 9.5-11 levels, and the strong flexor ratio 1.31 at middle part, pearlitic grain degree are
9.5-10 levels, the strong flexor ratio 1.28 of afterbody, pearlitic grain degree are 10-11 levels.Without adding Ti, remaining component proportion identical
The strong flexor ratio 1.25 on the reinforcing bar head of comparative example, pearlitic grain degree are 8-9 levels, the strong flexor ratio 1.27 at middle part, pearlitic grain
It is 8.5-9.5 levels to spend for 8-8.5 levels, the strong flexor ratio 1.23 of afterbody, pearlitic grain degree.
Embodiment 3
Match somebody with somebody according to following quality proportioning and take various raw materials：
C：0.23%, Si：0.35%, Mn：1.25%, Ti：0.015%, V：0.017%, remaining is Fe.
Above-mentioned raw materials are produced according to following process：
Converter smelting (tapping temperature is 1675 DEG C)-Argon (is opened argon gas before converter tapping, converter tapping whole process is blown
Argon, 2min, soft blow 5min are blown by force, temperature is 1585 DEG C after argon)-continuous casting-heating-rolling-cooling-cold shears scale-inspection-
Collection-storage.
Wherein, it is uniformly added into deoxidier sial calcium 0.5kg/t in converter smelting during converter tapping 1/4, adds during tapping 2/3
Finish；Start to add ferrosilicon, ferromanganese during converter tapping 1/3, finished to addition during tapping 2/3, add vanadium iron and ferrotianium afterwards；Go out
During steel 1/3 ature of coal carburant is added with steel stream；
Wherein, rolling include roughing, in roll and finish rolling, first 1# cutting heads roll in carrying out again after roughing, in roll after elder generation wear in advance
Finish rolling again after water, 2# cutting heads, carry out weak wearing water and 3# cuts multiple length after finish rolling；Rolling specs are Φ 20, start rolling temperature during rolling
1110 DEG C, 980 DEG C of final rolling temperature；
Wherein, it is cooled on cold bed and carries out, temperature on cooling table is 860 DEG C.
Remaining NM technological parameter uses prior art.
After tested：The structure of anti-seismic steel bar made from the present embodiment is pearlite+sorbite+a small amount of ferrite, should
The strong flexor ratio 1.29 on reinforcing bar head, pearlitic grain degree are 9.5-11 levels, and the strong flexor ratio 1.31 at middle part, pearlitic grain degree are
9.5-10 levels, the strong flexor ratio 1.28 of afterbody, pearlitic grain degree are 10-11 levels.Without adding Ti, remaining component proportion identical
The strong flexor ratio 1.25 on the reinforcing bar head of comparative example, pearlitic grain degree are 8-9 levels, the strong flexor ratio 1.27 at middle part, pearlitic grain
It is 8.5-9.5 levels to spend for 8-8.5 levels, the strong flexor ratio 1.23 of afterbody, pearlitic grain degree.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (7)
1. a kind of anti-seismic steel bar, it is characterised in that the anti-seismic steel bar is HRB400E high-strength anti-seismic steel bars, according to weight hundred
Divide ratio, including following component：C：0.20-0.25%, Si：0.30-0.40%, Mn：1.20-1.30%, Ti：0.01-0.02%,
V：0.015-0.023%, remaining is Fe；Control impurity content：S≤0.045%, P≤0.045%, the weight percent of each component
It is 100% than sum.
2. anti-seismic steel bar according to claim 1, it is characterised in that the institutional framework of the reinforcing bar is pearlite+Soxhlet
Body+ferrite, wherein pearlitic grain degree are 9.5-11 levels.
3. anti-seismic steel bar according to claim 1, it is characterised in that the strong flexor ratio of the reinforcing bar：1.28 ＜ R ° m/R ° eL
＜ 1.31.
4. a kind of production technology of anti-seismic steel bar as claimed in claim 1, it is characterised in that its technological process is：Converter smelting
Refining-Argon-continuous casting-heating-rolling-cooling-cold shears scale-inspection-collection-storage.
5. the production technology of anti-seismic steel bar according to claim 4, it is characterised in that Si, Mn, Ti, V points during converter smelting
Added not in the form of ferrosilicon, ferromanganese, ferrotianium, vanadium iron, be uniformly added into during converter tapping 1/4 deoxidier sial calcium 0.5kg/t or
Person carborundum 1.0-1.2kg/t, tapping 2/3 when addition finish；Start to add ferrosilicon, ferromanganese during converter tapping 1/3, to tapping 2/3
Shi Tianjia is finished, and adds vanadium iron and ferrotianium afterwards；Tap 1/3 when with steel stream add ature of coal carburant.
6. the production technology of anti-seismic steel bar according to claim 4, it is characterised in that rolling include roughing, in roll and smart
Roll, in roll after first wear water finish rolling again in advance, carried out after finish rolling it is weak wear water, rolling specs are Φ 16- Φ 28.
7. the production technology of the anti-seismic steel bar according to claim any one of 4-6, it is characterised in that start rolling temperature during rolling
1080 ± 30 DEG C, 950 ± 30 DEG C of final rolling temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710577584.2A CN107447164A (en) | 2017-07-15 | 2017-07-15 | A kind of anti-seismic steel bar and its production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710577584.2A CN107447164A (en) | 2017-07-15 | 2017-07-15 | A kind of anti-seismic steel bar and its production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107447164A true CN107447164A (en) | 2017-12-08 |
Family
ID=60488528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710577584.2A Pending CN107447164A (en) | 2017-07-15 | 2017-07-15 | A kind of anti-seismic steel bar and its production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107447164A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108570532A (en) * | 2018-05-11 | 2018-09-25 | 南京钢铁股份有限公司 | A method of improving directly upper steel grade quality and stopper rod flow control time |
| CN110125174A (en) * | 2019-03-28 | 2019-08-16 | 盐城市联鑫钢铁有限公司 | A kind of HRB400E-F valve snail fine grain rolling mill practice method |
| CN110791704A (en) * | 2019-10-16 | 2020-02-14 | 邯郸钢铁集团有限责任公司 | 400 MPa-grade vanadium-titanium composite microalloyed disc screw and production method thereof |
| CN110846568A (en) * | 2019-10-16 | 2020-02-28 | 邯郸钢铁集团有限责任公司 | 400 MPa-level straight reinforcing steel bar and production method thereof |
| CN111172459A (en) * | 2020-01-19 | 2020-05-19 | 江苏省沙钢钢铁研究院有限公司 | HRB600E vanadium-titanium microalloyed high-strength anti-seismic hot-rolled steel bar |
| CN115283434A (en) * | 2022-09-30 | 2022-11-04 | 中冶检测认证有限公司 | Novel cost-reducing and efficiency-improving process method for producing HRB400E spiral steel bar |
| CN115786814A (en) * | 2023-01-13 | 2023-03-14 | 山西建龙实业有限公司 | High-strength low-alloy structural steel and preparation process of hot-rolled steel strip thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210279A (en) * | 2006-12-25 | 2008-07-02 | 承德新新钒钛股份有限公司 | Technique for producing HRB400 stage reinforcing steel bar |
| CN102703813A (en) * | 2012-06-27 | 2012-10-03 | 攀枝花钢城集团有限公司 | Vanadium and titanium compound microalloyed steel bar and production method thereof |
| CN103469064A (en) * | 2013-08-23 | 2013-12-25 | 安阳钢铁股份有限公司 | High-strength anti-seismic HRB400E reinforcement bar and preparation method thereof |
| CN104745969A (en) * | 2015-04-03 | 2015-07-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | HRB400E high-strength corrosion-resistant steel bar and production process thereof |
-
2017
- 2017-07-15 CN CN201710577584.2A patent/CN107447164A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210279A (en) * | 2006-12-25 | 2008-07-02 | 承德新新钒钛股份有限公司 | Technique for producing HRB400 stage reinforcing steel bar |
| CN102703813A (en) * | 2012-06-27 | 2012-10-03 | 攀枝花钢城集团有限公司 | Vanadium and titanium compound microalloyed steel bar and production method thereof |
| CN103469064A (en) * | 2013-08-23 | 2013-12-25 | 安阳钢铁股份有限公司 | High-strength anti-seismic HRB400E reinforcement bar and preparation method thereof |
| CN104745969A (en) * | 2015-04-03 | 2015-07-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | HRB400E high-strength corrosion-resistant steel bar and production process thereof |
Non-Patent Citations (2)
| Title |
|---|
| 周琳等: "《中国长材轧制技术与装备》", 30 June 2014, 冶金工业出版社 * |
| 王引真等: "《材料工程基础》", 30 May 2015, 中国石油大学出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108570532A (en) * | 2018-05-11 | 2018-09-25 | 南京钢铁股份有限公司 | A method of improving directly upper steel grade quality and stopper rod flow control time |
| CN110125174A (en) * | 2019-03-28 | 2019-08-16 | 盐城市联鑫钢铁有限公司 | A kind of HRB400E-F valve snail fine grain rolling mill practice method |
| CN110791704A (en) * | 2019-10-16 | 2020-02-14 | 邯郸钢铁集团有限责任公司 | 400 MPa-grade vanadium-titanium composite microalloyed disc screw and production method thereof |
| CN110846568A (en) * | 2019-10-16 | 2020-02-28 | 邯郸钢铁集团有限责任公司 | 400 MPa-level straight reinforcing steel bar and production method thereof |
| CN111172459A (en) * | 2020-01-19 | 2020-05-19 | 江苏省沙钢钢铁研究院有限公司 | HRB600E vanadium-titanium microalloyed high-strength anti-seismic hot-rolled steel bar |
| CN115283434A (en) * | 2022-09-30 | 2022-11-04 | 中冶检测认证有限公司 | Novel cost-reducing and efficiency-improving process method for producing HRB400E spiral steel bar |
| CN115283434B (en) * | 2022-09-30 | 2023-01-24 | 中冶检测认证有限公司 | Process method for producing HRB400E spiral steel bar |
| CN115786814A (en) * | 2023-01-13 | 2023-03-14 | 山西建龙实业有限公司 | High-strength low-alloy structural steel and preparation process of hot-rolled steel strip thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107447164A (en) | A kind of anti-seismic steel bar and its production technology | |
| CN111519100B (en) | Niobium-vanadium microalloyed 400 MPa-grade ultrafine-grain high-toughness anti-seismic reinforcing steel bar and preparation method thereof | |
| CN111748741B (en) | Thick pipeline steel and low compression ratio production process thereof | |
| CN102943212B (en) | NM500 high-strength wear-resistant steel plate and heat treatment technique thereof | |
| CN100519812C (en) | Pearlite like high strength low alloy rail steel producing method | |
| JP2021526587A (en) | Hot-rolled H-shaped steel with a thick gauge having a yield strength of 500 MPa grade and its manufacturing method | |
| CN102383033A (en) | 600-MPa grade vanadium-containing high-strength hot-rolled steel bar and production method thereof | |
| CN104294162B (en) | A kind of 785MPa grade high-strength prestressed structure spiral and preparation method thereof | |
| JP2022502569A (en) | Wear-resistant steel with excellent hardness and impact toughness and its manufacturing method | |
| CN104018075A (en) | Hot rolled ribbed steel bar with yield-to-tensile ratio of less than or equal to 0.8 and Rel of more than or equal to 600MPa, and production method | |
| CN111101079A (en) | Large-size fine-grain high-strength anti-seismic reinforcing steel bar and preparation method thereof | |
| CN104087850B (en) | A kind of anti-H2Anchor bar steel and the production method for mine of S corrosion | |
| CN109881089B (en) | High-strength wear-resistant steel and preparation method thereof | |
| CN103898406A (en) | Steel plate with 890MPa-grade yield strength and low welding crack sensitivity and manufacturing method thereof | |
| CN108342655A (en) | A kind of quenching and tempering type acid-resistant pipeline steel and its manufacturing method | |
| JP2022502570A (en) | Wear-resistant steel with excellent hardness and impact toughness and its manufacturing method | |
| JP2023506822A (en) | High-hardness wear-resistant steel with excellent low-temperature impact toughness and method for producing the same | |
| TWI415954B (en) | High strength steel and its manufacturing method | |
| JPH10306316A (en) | Production of low yield ratio high tensile-strength steel excellent in low temperature toughness | |
| CN104372249A (en) | 960MPa high-strength twisted steel bar for prestressed structures and preparation method thereof | |
| CN109943771B (en) | High-toughness weldable steel plate with fine grain structure and production method thereof | |
| JP2007191785A (en) | Method for manufacturing high-tensile steel material superior in weld cracking resistance | |
| CN109536842A (en) | A kind of wear-resistant hot rolling steel strengthened by titanium carbonitride hard particles and production method | |
| JP2002363696A (en) | Pearlitic rail having excellent toughness and ductility and production method therefor | |
| CN110878401B (en) | Preparation method of 1300 MPa-grade rare earth reverse transformation Q & P steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for 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: 20171208 |