CN107335971A - The compound spiral of carbon steel stainless steel and its manufacture method - Google Patents
The compound spiral of carbon steel stainless steel and its manufacture method Download PDFInfo
- Publication number
- CN107335971A CN107335971A CN201710457050.6A CN201710457050A CN107335971A CN 107335971 A CN107335971 A CN 107335971A CN 201710457050 A CN201710457050 A CN 201710457050A CN 107335971 A CN107335971 A CN 107335971A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- carbon steel
- steel
- reinforcing bar
- soaking
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Disclose the compound spiral of carbon steel stainless steel and its manufacture method.Methods described includes：A) method for using explosive welding, preferably vacuum explosive welding, stainless steel seamless pipe and carbon steel bar are welded, so as to obtain the round billet as initial blank；B) round billet is subjected to soaking；And the round billet of the soaking c) is subjected to tandem rolling, so as to obtain the compound spiral of carbon steel stainless steel.The compound spiral of carbon steel stainless steel has the corrosion resistance of stainless steel and the mechanical characteristic of carbon steel concurrently.
Description
Field
The application relates generally to alloy field, more specifically, the application is related to compound thread reinforcing bar field.
Background
The carbon steel bar being largely used at present in ordinary reinforced concrete structure, its deadly defect is resistant to rust ability,
Easily by corrosion under corrosive environment, cause the performance degradation of structure, the serious curtailment service life of structure.Steel bar corrosion is
Massive losses are caused to existing building.In recent years, stainless steel rebar is with its excellent corrosion resistance characteristic, permanent use
Life-span and good mechanical performance, are increasingly favored by important building industry, effectively improve structure durability,
Reduce maintenance cost, extend the service life of structure, obtain rapid hair in bridge, harbour and architectural engineering abroad
Exhibition and application.But stainless steel rebar has the shortcomings that expensive, mass excess, stainless steel rebar can be produced in the world at present
Enterprise is still seldom, limits the popularization of its application.In this context, explore one kind and have stainless steel corrosion resistance and carbon steel concurrently
The new material of cost advantage turns into one of direction of industry research.
General introduction
On the one hand, the application is related to the method for manufacture carbon steel-stainless steel compound thread reinforcing bar, and it includes：A) using blast
Welding, stainless steel seamless pipe and carbon steel bar is welded, so as to obtain the round billet as initial blank；B) by the round billet
Carry out soaking；And the round billet of the soaking c) is subjected to tandem rolling, so as to obtain the carbon steel-stainless steel compound thread reinforcing bar.
On the other hand, the application is related to carbon steel-stainless steel compound thread reinforcing bar, and it is manufactured by the method comprised the following steps
Obtain：A) explosive welding is used, stainless steel seamless pipe and carbon steel bar are welded, so as to obtain the circle as initial blank
Base；B) round billet is subjected to soaking；And the round billet of the soaking c) is subjected to tandem rolling, so as to obtain the carbon steel-stainless
Steel compound thread reinforcing bar.
Brief Description Of Drawings
Fig. 1 is the schematic flow sheet of vacuum explosive welding in the embodiment of the application one.
Fig. 2 is the schematic diagram of vacuum explosive welding in the embodiment of the application one.
The schematic diagram of the embodiment medium carbon steel of Fig. 3 the application one-compound round billet of stainless steel.
Fig. 4 is shown in the embodiment of the application one carries out explosion welding using the method for vacuum explosive welding, after soldering
Round billet section.
Fig. 5 shows the section of the embodiment medium carbon steel of the application one-compound spiral of stainless steel.
Fig. 6 show the embodiment medium carbon steel of the application one-stainless steel compound spiral acid it is white after surface.
It is described in detail
In the following description, including some concrete details are comprehensively managed with providing each disclosed embodiment
Solution.However, those skilled in the relevant art are not, it will be recognized that use one or more of these concrete details, and use other
Embodiment is still realized in the case of method, part, material etc..
Unless required otherwise in the application, in entire disclosure and appended claims, word " comprising ", " bag
Containing ", " containing " and " having " should be interpreted that meaning that is open, including formula, i.e., " include but is not limited to ".
" embodiment " mentioned throughout the specification, " embodiment ", " in another embodiment " or " at certain
In a little embodiments " mean an at least embodiment include it is related to described in the embodiment with specific reference to key element,
Structure or feature.Therefore, throughout the specification diverse location occur phrase " in one embodiment " or " in embodiment
In " or " in another embodiment " or " in certain embodiments " same embodiment need not be all referred to.In addition, specifically
Element, structure or feature can combine in one or more embodiments in any suitable manner.
Definition
Herein, term " explosive welding " mean using impulsive force caused by explosive charge cause workpiece collide rapidly and
The method for realizing welding.
Herein, term " seamless pipe " is meant with hollow section, the non-jointed strip steel in periphery.
Herein, term " guide and guard " is meant during rolling of sectional iron, helps rolled piece to press before and after roll pass
Set direction and state exactly, the device of stably into and out roll pass.
Herein, term " soaking " means the last stage of heating steel billet, and steel billet is heated at a certain temperature,
Make steel billet internal and external temperature gradually consistent.
Herein, it is cold by force to mean that rolled piece is carried out through water cooling plant immediately after being shut out from milling train for term " Water cooling "
But control cooling means.
Herein, " 0Cr18Ni9 " is meant based on percentage by weight, contains C≤0.08, Si≤1.00, Mn≤2.00, S
≤ 0.030, P≤0.045, Cr 18.00-20.00, Ni 8.00-10.50, surplus are Fe and other inevitable impurity
Stainless steel.
Herein, term " 316 stainless steel " is meant based on percentage by weight, contains C≤0.08, Si≤1, Mn≤2, P
≤ 0.045, S≤0.030, Ni 10.0-14.0, Cr 16.0-18.0, Mo 2.00-3.00, N 0, surplus be Fe and other not
The stainless steel of evitable impurity.
Herein, " term two phase stainless steel " means that ferrite respectively accounts for 50% with austenite, and general less phase contains
Amount at least is also required to reach 30% stainless steel.
Herein, term " ferrite " means interstitial solid solution of the carbon dissolution in α-Fe, and it has body-centered cubic brilliant
Lattice, conventional sign F are represented.Pure ferritic structure has good plasticity and toughness, but intensity and hardness are all relatively low.
Herein, term " austenite " means the nonmagnetic solid solution that a small amount of carbon is dissolved in γ-Fe, and there is the center of area to stand for it
Square structure.Austenite plasticity is preferable, and intensity is relatively low, has certain toughness, without ferromagnetism.
Herein, term " Q345 " means a kind of low-alloy steel, wherein " Q " means yield strength, Q345 represents this
Steel yield strength is 345MPa.General phosphorus content is less than or equal to 0.20%, and manganese content is less than or equal to 1.70%.
Herein, term " X70 " means pipe line steel, wherein " X " represents pipe line steel, " 70 " represent intensity rank, i.e., most
Small yield strength is 700kpsi, and it is about 483MPa to be converted into metric unit.
Herein, term " X80 " means pipe line steel, wherein " X " represents pipe line steel, " 80 " represent intensity rank, i.e., most
Small yield strength is 800kpsi, and it is about 552MPa to be converted into metric unit.
Herein, term " linearity " means the offset in any straight horizontal direction, suitable for description cylinder
Straight degree.
Specific embodiment
On the one hand, the application is related to the method for manufacture carbon steel-stainless steel compound thread reinforcing bar, and it includes：A) using blast
Welding, stainless steel seamless pipe and carbon steel bar is welded, so as to obtain the round billet as initial blank；B) by the round billet
Carry out soaking；And the round billet of the soaking c) is subjected to tandem rolling, so as to obtain the carbon steel-stainless steel compound thread reinforcing bar.
In certain embodiments, using vacuum explosive welding, stainless steel seamless pipe and carbon steel bar are welded, from
And obtain the round billet as initial blank.
In certain embodiments, vacuum explosive welding includes：Stainless steel seamless pipe and carbon steel bar are provided, to it is described not
The steel seamless pipe that becomes rusty examines size and carries out surface derusting to the carbon steel bar, and by the stainless steel seamless pipe and to described
Carbon steel bar group pair simultaneously carries out Explosion composite.
In certain embodiments, the exemplary approach that can be used in the surface derusting of the application includes but is not limited to shot-peening
And reconditioning.
In certain embodiments, the elongated linearity of carbon steel bar is about≤1mm.
In certain embodiments, the elongated linearity of stainless steel seamless pipe is about≤1mm.
In certain embodiments, the length of carbon steel bar and the length of stainless steel seamless pipe are consistent.
In certain embodiments, the inner wall size of stainless steel seamless pipe and the diameter dimension difference of carbon steel bar are approximately less than
In 1mm, so that it is guaranteed that blast soldering and welding quality.
In certain embodiments, carbon steel material is by before final rolling pass, making rolled piece be rapidly cooled to about 700
DEG C, mechanical property can be made to reach more than 400MPa, be easy to substitute 400MPa level Epoxy Resin Coated Steel Bars.
In certain embodiments, it can be used in the illustrative methods for making rolled piece be rapidly cooled to about 700 DEG C of the application
Including but not limited to through make rolled piece water tank, by water pipe and reversely water spray.
In certain embodiments, the carbon steel-stainless steel compound thread reinforcing bar obtained to step c) carries out pickling.
In certain embodiments, the sour illustrative examples that can be used in the application carrying out pickling include but is not limited to
H2SO4With HF and HNO4Nitration mixture.
In certain embodiments, the method for manufacturing carbon steel-stainless steel compound thread reinforcing bar, it includes：A) using blast
Welding, stainless steel seamless pipe and carbon steel bar is welded, so as to obtain the round billet as initial blank；B) by the round billet
Carry out soaking；C) round billet of the soaking is subjected to tandem rolling, so as to obtain carbon steel-stainless steel compound thread reinforcing bar；It is and d) right
The carbon steel-stainless steel compound thread reinforcing bar carries out pickling.
In certain embodiments, the illustrative examples that can be used in the stainless steel seamless pipe of the application include but is not limited to
0Cr18Ni9,316 stainless steels and two phase stainless steel.
In certain embodiments, the illustrative examples that can be used in the carbon steel bar of the application include but is not limited to
Q345, X70 and X80.
In certain embodiments, the surface of the inwall to stainless steel seamless pipe and carbon steel bar is cleaned and is allowed to light
It is bright, it can be ensured that the degree of purity of composite billet.
In certain embodiments, by explosive close arrangement during explosive welding, it is possible to reduce gas is brought into, can be with
Ensure the degree of purity of composite billet.
In this application, it is high with finished product rib will to take into account cost for the wall thickness of stainless steel seamless pipe, it is ensured that finished product cross rib, longitudinal rib are
Stainless steel.
In certain embodiments, the diameter of round billet is about 80-100mm.
In certain embodiments, stainless steel layer thickness is about 5-10mm in round billet.
In certain embodiments, soaking temperature is about 1100-1150 DEG C.
In certain embodiments, soaking time was approximately less than equal to 2 hours, and core carbon steel excessive grain can be avoided to grow
Greatly.
In certain embodiments, soaking time was approximately less than equal to 1 hour.
In certain embodiments, the start rolling temperature of tandem rolling, which is approximately more than, is equal to 1000 DEG C, it is ensured that inside and outside compound round billet
Possess close Deformation Resistance, come off in order to avoid producing outer layer in the operation of rolling.
In certain embodiments, continuous rolling process also includes Water cooling.
In certain embodiments, finished product mechanical property can be improved by Water cooling.
In certain embodiments, the yield strength of carbon steel-stainless steel compound thread reinforcing bar can be made by Water cooling
Reach more than 450MPa.
In certain embodiments, the finishing temperature of tandem rolling is approximately less than 900 DEG C, can effectively improve finished product with crystal grain thinning
Yield strength.
In certain embodiments, tandem rolling include heating furnace soaking, roughing mill rolling, flying shear crop end, middle mill milling,
Water cooling and finisher rolling.
In certain embodiments, 4 frame roughing mills can be used to roll.
In certain embodiments, mill milling in 4 framves can be used.
In certain embodiments, product mill milling can be put up using 2.
In certain embodiments, in the carbon steel-stainless steel compound thread reinforcing bar, thickness is about big at stainless steel basic circle
In 1mm.
In certain embodiments, in the carbon steel-stainless steel compound thread reinforcing bar, thickness is about at stainless steel basic circle
1.5-3mm。
It can be produced using the manufacture method of the application and have stainless steel corrosion resistance, the carbon steel-no of carbon steel mechanical characteristic concurrently
Become rusty steel compound thread reinforcing bar.
On the other hand, the application is related to carbon steel-stainless steel compound thread reinforcing bar, and it is manufactured by the method comprised the following steps
Obtain：A) explosive welding is used, stainless steel seamless pipe and carbon steel bar are welded, so as to obtain the circle as initial blank
Base；B) round billet is subjected to soaking；And the round billet of the soaking c) is subjected to tandem rolling, so as to obtain the carbon steel-stainless
Steel compound thread reinforcing bar.
In certain embodiments, carbon steel-stainless steel compound thread reinforcing bar is Ф 20- Ф 28mm.
The carbon steel-stainless steel compound thread reinforcing bar of the application possesses excellent mechanical property and corrosion resisting property, can substitute
Epoxy Resin Coated Steel Bars and stainless spiral.
Hereinafter, the application will be explained in detail by following examples to more fully understand each side of the application
Face and its advantage.It will be appreciated, however, that following embodiment is the nonrestrictive some realities for being simply used for illustrating the application
Apply scheme.
Embodiment
Embodiment 1
Handled according to preprepared stainless steel seamless pipe, carbon steel Surface of Rod Bar, the side for weldering of being exploded using vacuum
Method carries out explosion welding.
The technique of vacuum explosive welding includes：
(1) carbon steel bar surface derusting
Carbon steel bar any surface finish non-corroding is made by modes such as shot-peening or reconditionings.
(2) specification is matched：
Carbon steel bar：Elongated linearity requirement≤1mm；
Stainless steel seamless pipe：Elongated linearity requirement≤1mm；It is and length of steel pipe is consistent with round steel length.
(3) Parameters of Explosive Cladding
Spacing：3-8mm；
Explosive height：35-55mm, with internal diameter 180-190mm pvc pipe confined explosive；
One blasting cap initiation, fire point are located at cylinder one end.
Round steel shown in Fig. 2 is carbon steel bar, and steel pipe is stainless steel seamless pipe, and gap is carbon steel bar and stainless steel jointless
Gap between pipe, explosive are the orthodox explosive for exploding, and pvc pipe is used for confined explosive, and carries the appearance of internal pressure
Device, base are used to undertake whole Explosion composite process, ensure the stable pedestal of whole process.
Round billet section after soldering is as shown in Figure 4.Wherein, stainless steel seamless pipe material is that 0Cr18Ni9, carbon steel material connect
Nearly Q345, compound round billet external diameter are 85mm, and stainless steel layer thickness is 8mm.
This round billet is subjected to soaking in resistance-type trolley heating furnace, soaking temperature is 1100-1150 DEG C, is gone out after soaking 1h
Steel rolling.
Deflection is computed, on the premise of ensureing that cross rib, longitudinal rib are stainless steel, it is trimmed size to choose Ф 28mm, is rolled
Line uses Continuous mill train, and rolling parameter is：
In the present embodiment, 2 blanks are rolled altogether, from the point of view of process, have no that stainless steel layer sticks up skin, obscission, success
Carbon steel-stainless steel compound thread reinforcing bar is shut out, hot rolling basic circle size is 27.6mm, a height of 1.4mm of longitudinal rib, is spreaded basic with carbon steel
Unanimously, finished product stainless steel layer thickness is 1.5-2mm, is influenceed by finished product guide centering uniformity, each position distortions slightly have difference.It is horizontal
Rib, longitudinal rib are stainless steel layer, can ensure turning screw thread allowance in following process (cross section is as shown in Figure 5).
Carbon steel-stainless steel compound thread reinforcing bar after hot rolling is through H2SO4After pickling, appearance is consistent with stainless steel (as schemed
Shown in 6), reach the corrosion resistances (table 1) of 304 stainless steels.
The finished product mechanical experimental results of table 1.
| Specification | Surrender | Tension | Elongation percentage | Shrinkage factor | Bending | Ballistic work |
| Ф28 | 351 | 566 | 30.5 | 23.2 | 3a is qualified | 230 |
As a result visible, the compound thread steel bar mechanics performance remains Q345 characteristic.
Embodiment 2
It is similar with the method for embodiment 1, but increase water cooling means in 7,8 framves, the mechanics of finished product is improved by crystal grain thinning
Performance, improve finished product tissue, yield strength can be made to bring up to more than 450MPa.
In this application, using existing production line of bar and stainless screw-thread steel series pass, size essence can be produced
Degree, rib thread form shape reach the carbon steel-stainless steel compound thread reinforcing bar of standard, and finished product basic circle stainless steel thickness is more than 1mm.
From the foregoing it is appreciated that although describing specific embodiments of the present invention for the purpose of exemplary illustration,
But under condit without departing from the spirit and scope of the present invention, technical staff described in this area can make various modifications or change
Enter.These deformations or modification should all fall into the application scope of the following claims.
Claims (10)
1. manufacturing the method for carbon steel-stainless steel compound thread reinforcing bar, it includes：
A) method for using explosive welding, preferably vacuum explosive welding, stainless steel seamless pipe and carbon steel bar are welded, from
And obtain the round billet as initial blank；
B) round billet is subjected to soaking；And
C) round billet of the soaking is subjected to tandem rolling, so as to obtain the carbon steel-stainless steel compound thread reinforcing bar.
2. the method as described in claim 1, it also includes：
D) the carbon steel-stainless steel compound thread reinforcing bar obtained to step c) carries out pickling, preferably using H2SO4Carry out pickling.
3. method as claimed in claim 1 or 2, wherein the stainless steel seamless pipe is selected from 0Cr18Ni9,316 stainless steels and double
Phase stainless steel.
4. the method as described in any claim in claim 1-3, wherein the carbon steel rod material be selected from Q345, X70 and
X80。
5. the method as described in any claim in claim 1-4, wherein the soaking temperature is 1100-1150 DEG C, it is excellent
Soaking time is selected to be less than or equal to 2 hours, more preferably less than or equal to 1 hour.
6. method according to any one of claims 1 to 5, wherein the thickness of the stainless steel seamless pipe is 5-
10mm。
7. the method as described in any claim in claim 1-6, wherein the continuous rolling process also includes Water cooling.
8. the method as described in any claim in claim 1-7, wherein the start rolling temperature of the tandem rolling is more than or equal to
1000 DEG C, finishing temperature is less than 900 DEG C.
9. the method as described in any claim in claim 1-8, wherein in the carbon steel-stainless steel compound thread reinforcing bar
In, thickness is more than 1mm, preferably 1.5-3mm at stainless steel basic circle.
10. the carbon steel-stainless steel compound thread reinforcing bar manufactured as the method described in any claim in claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710457050.6A CN107335971A (en) | 2017-06-16 | 2017-06-16 | The compound spiral of carbon steel stainless steel and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710457050.6A CN107335971A (en) | 2017-06-16 | 2017-06-16 | The compound spiral of carbon steel stainless steel and its manufacture method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107335971A true CN107335971A (en) | 2017-11-10 |
Family
ID=60219951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710457050.6A Pending CN107335971A (en) | 2017-06-16 | 2017-06-16 | The compound spiral of carbon steel stainless steel and its manufacture method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107335971A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900625A (en) * | 2017-12-07 | 2018-04-13 | 太原钢铁(集团)有限公司 | The compound spiral of carbon steel stainless steel and its manufacture method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002364121A (en) * | 2001-06-05 | 2002-12-18 | Araya Industrial Co Ltd | Concrete reinforcing material |
| CN2648225Y (en) * | 2003-07-02 | 2004-10-13 | 赵惠敏 | Thin layer stainless steel composite steel pipe |
| CN101032783A (en) * | 2007-04-16 | 2007-09-12 | 束润涛 | Explosion welding technique of composite steel pipes of stainless steel and carbon steel |
| CN102011463A (en) * | 2010-11-01 | 2011-04-13 | 山东大学 | Stainless steel composite corrosion-resisting reinforcement bar and preparation method thereof |
| CN105921947A (en) * | 2016-05-03 | 2016-09-07 | 陈志明 | Preparation method of stainless steel coated reinforcing steel bar, flat steel, round steel and deformed steel |
-
2017
- 2017-06-16 CN CN201710457050.6A patent/CN107335971A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002364121A (en) * | 2001-06-05 | 2002-12-18 | Araya Industrial Co Ltd | Concrete reinforcing material |
| CN2648225Y (en) * | 2003-07-02 | 2004-10-13 | 赵惠敏 | Thin layer stainless steel composite steel pipe |
| CN101032783A (en) * | 2007-04-16 | 2007-09-12 | 束润涛 | Explosion welding technique of composite steel pipes of stainless steel and carbon steel |
| CN102011463A (en) * | 2010-11-01 | 2011-04-13 | 山东大学 | Stainless steel composite corrosion-resisting reinforcement bar and preparation method thereof |
| CN105921947A (en) * | 2016-05-03 | 2016-09-07 | 陈志明 | Preparation method of stainless steel coated reinforcing steel bar, flat steel, round steel and deformed steel |
Non-Patent Citations (1)
| Title |
|---|
| 汪旭光: "《爆炸合成新材料与高效、安全爆破关键科学和工程技术》", 30 August 2011, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900625A (en) * | 2017-12-07 | 2018-04-13 | 太原钢铁(集团)有限公司 | The compound spiral of carbon steel stainless steel and its manufacture method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2028284B1 (en) | High-strength seamless steel pipe for mechanical structure which has excellent toughness and weldability, and method for manufacture thereof | |
| EP1288316B1 (en) | Method for making high-strength high-toughness martensitic stainless steel seamless pipe | |
| WO2020169077A1 (en) | Low-cost weathering steel and production method thereof | |
| CN101869911B (en) | Production technology of precise stainless steel strip used for high-level mobile phone | |
| CN105568143B (en) | Thick pipeline steel hot continuous rolling steel strip easy to wind and excellent in low-temperature performance and manufacturing method thereof | |
| JP6874913B2 (en) | Square steel pipe and its manufacturing method and building structure | |
| EP1563106B1 (en) | Cold-worked steels with packet-lath martensite/austenite microstructure | |
| WO2019047587A1 (en) | Hot continuous rolled steel coil for high collapse strength sew oil casing and production method therefor | |
| CN105624382A (en) | Hot-rolling method for V-Ti microalloyed steel | |
| CN105177423B (en) | A kind of big wall thickness X65M Pipeline Steel Plates and its manufacture method | |
| CN108193141A (en) | A kind of Q550 rank hot-strips of V-N-Cr microalloyings and preparation method thereof | |
| CN110629129B (en) | Flexible manufacturing method capable of simultaneously producing X52 and X60 grade pipeline steel | |
| CN116083792A (en) | Anti-seismic weather-resistant steel plate for V-system 550 MPa-level building structure and preparation method thereof | |
| CN111719082A (en) | Hot-rolled weather-resistant steel strip and flexible manufacturing method thereof | |
| CN105063511B (en) | Ultra-low carbon bainite thin gauge steel plate rolled through heavy and medium plate mill and production method of ultra-low carbon bainite thin gauge steel plate | |
| TW202045745A (en) | Rectangular steel tube and method for manufacturing same, and building structure | |
| EP2671962B1 (en) | Steel sheet for bottom of aerosol cans with high resistance to pressure and high formability and method for manufacturing the same | |
| CN107900625A (en) | The compound spiral of carbon steel stainless steel and its manufacture method | |
| CN107335971A (en) | The compound spiral of carbon steel stainless steel and its manufacture method | |
| CN110004359A (en) | A kind of high uniform vertically and horizontally toughness wide cut steel plate and its TMCP technique production method | |
| TWI754213B (en) | Square steel pipe, method for manufacturing the same, and building structure | |
| JP5515353B2 (en) | Hot rolled T-section steel and manufacturing method thereof | |
| CN113802071A (en) | Production method of high manganese steel plate with good obdurability matching and used for LNG storage tank | |
| JP2017078196A (en) | Production method of thick hot rolled steel strip for steel tube and production method of square steel tube | |
| CN108672515B (en) | Rolling method of high-manganese medium plate for LNG storage tank |
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 |
Application publication date: 20171110 |
|
| RJ01 | Rejection of invention patent application after publication |