CN107900625A - 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
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- CN107900625A CN107900625A CN201711281858.XA CN201711281858A CN107900625A CN 107900625 A CN107900625 A CN 107900625A CN 201711281858 A CN201711281858 A CN 201711281858A CN 107900625 A CN107900625 A CN 107900625A
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- stainless steel
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- 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
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- 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
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Abstract
The compound spiral of carbon steel stainless steel for disclosing the method for the manufacture compound spiral of carbon steel stainless steel and being manufactured by this method.The described method includes：A) carbon steel as inner core and the stainless steel as outside diameter are provided；B) carbon steel and stainless steel are subjected to assembly and are sealed using welding；C) air in the assembly of the welded seal is extracted out so that vacuum is less than or equal to 8 × 10‑2；And the assembly vacuumized d) is subjected to hot rolling, so as to obtain the compound spiral of carbon steel stainless steel.The compound spiral of carbon steel stainless steel obtained using this method has stainless steel corrosion resistance and carbon steel mechanical characteristic concurrently.
Description
Field
The application relates generally to alloy field, more specifically, this application involves compound thread reinforcing bar field.
Background
The carbon steel bar being largely used at present in ordinary reinforced concrete structure, holds under seawater or the corrosive environment of humidity
Easily by corrosion, cause the intensity decreases of facility structure, seriously affected the service life of facility structure.To change above situation,
Release one after another Epoxy Resin Reinforcement and stainless steel rebar in recent years.Epoxy Resin Reinforcement due to anticorrosion layer is thin and bond strength not
Height, in roping and the easy injured surface of work progress, corrosion resistant degree of corrosion is relatively poor, is restricted in the use of key project.
Stainless steel rebar is increasingly favored be subject to important building industry due to excellent corrosion resistance characteristic, and good mechanical performance,
The durability of structure, the service life for reducing maintenance cost, extending structure are effectively improved, abroad bridge, harbour
And rapid development and application are obtained in architectural engineering.But stainless steel rebar price is high, is limited in common facility structure
The promoting the use of of stainless reinforcing bar.In this context, a kind of stainless steel corrosion resistance and carbon steel cost advantage of having concurrently is explored
New material becomes one of direction of industry research.
General introduction
On the one hand, this application involves the method for manufacture carbon steel-stainless steel compound thread reinforcing bar, it includes：A) conduct is provided
The carbon steel of inner core and the stainless steel as outside diameter；B) carbon steel and stainless steel are subjected to assembly and are sealed using welding；
C) air in the assembly of the welded seal is extracted out so that vacuum is less than or equal to 8 × 10-2；And d) taken out described very
Empty assembly carries out hot rolling, so as to obtain the carbon steel-stainless steel compound thread reinforcing bar.
On the other hand, this application involves carbon steel-stainless steel compound thread reinforcing bar, it is manufactured by method comprising the following steps
Obtain：A) carbon steel as inner core and the stainless steel as outside diameter are provided；B) carbon steel and stainless steel are subjected to assembly and adopted
Sealed with welding；C) air in the assembly of the welded seal is extracted out so that vacuum is less than or equal to 8 × 10-2；With
And the assembly vacuumized d) is subjected to hot rolling, so as to obtain the carbon steel-stainless steel compound thread reinforcing bar.
Brief Description Of Drawings
Fig. 1 shows the compound square billet in one embodiment of the application.
Fig. 2 shows the compound round billet in one embodiment of the application.
Fig. 3 show one embodiment medium carbon steel of the application-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, component, 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 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 with described in the embodiment it is relevant 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 " 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, 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 " Q345 " means low-alloy structural steel, and Q refers to yield strength, and 345 represent intensity rank, i.e., most
Small yield strength 345MPa.
Herein, term " Q460 " means low-alloy structural steel, and Q refers to yield strength, and 460 represent intensity rank, i.e., most
Small yield strength 460MPa.
Herein, term " 42CrMo " means high alloy high strength steel, minimum yield strength 930Mpa after quenching.
Herein, term " 06Cr19Ni10 " means finger austenitic stainless steel, and component performance performs GB/T4237.
Herein, term " 06Cr17Ni12Mo2 " means finger austenitic stainless steel, and component performance performs GB/T4237.
Herein, term " 022Cr17Ni12Mo2N " means finger austenitic stainless steel, and component performance performs GB/
T4237。
Herein, term " 022Cr22Ni5Mo3N " means two phase stainless steel, and component performance performs GB/T4237.
Herein, term " 022Cr12 " means ferritic stainless steel, and component performance performs GB/T4237.
Herein, term " straightness " means the offset in any straight horizontal direction, suitable for description cylinder
Straight degree.
Specific embodiment
On the one hand, this application involves the method for manufacture carbon steel-stainless steel compound thread reinforcing bar, it includes：
A) carbon steel as inner core and the stainless steel as outside diameter are provided；
B) carbon steel and stainless steel are subjected to assembly and are sealed using welding；
C) air in the assembly of the welded seal is extracted out so that vacuum is less than or equal to 8 × 10-2；And
D) assembly vacuumized is subjected to hot rolling, so as to obtain the carbon steel-stainless steel compound thread reinforcing bar.
In certain embodiments, the carbon steel-stainless steel compound thread reinforcing bar obtained to step d) carries out pickling.
In certain embodiments, the sour illustrative examples that can be used in the application carrying out pickling include but 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) carbon steel as inner core and the stainless steel as outside diameter are provided；
B) carbon steel and stainless steel are subjected to assembly and are sealed using welding；
C) air in the assembly of the welded seal is extracted out so that vacuum is less than or equal to 8 × 10-2；
D) assembly vacuumized is subjected to hot rolling, so as to obtain the carbon steel-stainless steel compound thread reinforcing bar；And
E) pickling is carried out to the carbon steel-stainless steel compound thread reinforcing bar.
In certain embodiments, during welding, bottom first uses gas shield welding back cover, surface melting welding or submerged arc welding.
In certain embodiments, the inner wall of stainless steel is about bigger 0.5-1mm than the appearance and size of the carbon steel.
In certain embodiments, roll as continuous rolling, so that by roll forming of carbon steel-stainless steel composite billet.
In certain embodiments, the technique of continuous rolling includes：Heating furnace soaking --- high pressure water dephosphorization --- is thick
Mill milling --- --- --- receive middle mill milling flying shear crop end by finishing mill rolling --- multi-length shear segmentation --- cold bed
Collect --- pickling --- test package.
In certain embodiments, according to the rolling theory of stainless steel, middle each pass of sortie ensures certain hole type design
Opening degree, it is ensured that for middle sortie without over-filling, completed belt rib holes type ensures that finished size, shape reach GB1499.2-2007
Requirement.
In certain embodiments, hot rolling includes carrying out soaking to the assembly vacuumized, is then rolled again.
In certain embodiments, soaking temperature is about 1150-1250 DEG C.
In certain embodiments, soaking time is approximately less than equal to 2h, in case center portion carbon steel excessive grain is grown up.
In certain embodiments, start rolling temperature is based on the rolling temperature of stainless steel.
In certain embodiments, start rolling temperature is not less than about 1200 DEG C, to ensure to possess close heat inside and outside composite billet
Resistance of deformation, comes off in order to avoid producing outer layer in the operation of rolling.
In certain embodiments, the ratio of stainless steel and carbon steel is about 5%-30%.
In certain embodiments, the operation of rolling further includes Water cooling.
In certain embodiments, the technique of continuous rolling includes：Heating furnace soaking --- high pressure water dephosphorization --- is thick
--- --- --- Water cooling --- finishing mill rolling --- wears water cooling to middle mill milling to flying shear crop end to mill milling
But --- multi-length shear segmentation --- cold bed collection --- pickling --- test package.
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, finishing temperature is approximately less than 900 DEG C, so that crystal grain thinning, can effectively improve finished product and bend
Take intensity.
In certain embodiments, the Ra of carbon steel is about≤2.54 μm.
In certain embodiments, the straightness of carbon steel about≤0.5mm/ is elongated.
In certain embodiments, the Ra of stainless steel is about≤2.54 μm.
In certain embodiments, can be used in the stainless steel of the application illustrative examples include but not limited to shaped steel and
Steel pipe.
In certain embodiments, the illustrative examples that can be used in the stainless steel of the application include but not limited to
06Cr19Ni10,022Cr19Ni10N, 06Cr17Ni12Mo2,022Cr17Ni12Mo2N, 022Cr22Ni5Mo3N and 022Cr12
Stainless steel.
In certain embodiments, the illustrative examples that can be used in the carbon steel of the application include but not limited to square billet or rod
Material.
In certain embodiments, can be used in the carbon steel of the application illustrative examples include but not limited to X70,
Q345, Q420 and 42CrMo.
In certain embodiments, the surface of the inner wall to stainless steel and carbon steel is cleaned and is allowed to bright, can be true
Protect the degree of purity of composite billet.
In certain embodiments, in the carbon steel-stainless steel compound thread reinforcing bar, thickness is about at stainless steel basic circle
0.3-3mm。
In certain embodiments, the compression ratio of compound square billet and finished product is approximately more than 4.
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, this application involves carbon steel-stainless steel compound thread reinforcing bar, it is manufactured by method comprising the following steps
Obtain：
A) carbon steel as inner core and the stainless steel as outside diameter are provided；
B) carbon steel and stainless steel are subjected to assembly and are sealed using welding；
C) air in the assembly of the welded seal is extracted out so that vacuum is less than or equal to 8 × 10-2；And
D) assembly vacuumized is subjected to hot 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 about Ф 10- Ф 40mm.
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.
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 non-limiting some realities for being simply used for explanation the application
Apply scheme.
Embodiment
Embodiment 1
1. billet material X70, specification：220 × 220 × 3300 orStainless steel 304, specification 12 × 890 ×
3300 or
2. a pair billet surface is machined, Ra≤2.54 μm are required after machining；Straightness≤0.5mm/ is elongated.No
Rust steel surface is first processed by shot blasting that Ra≤2.54 μm, after finish reaches requirement, according to side's (circle) base specification, process shaped steel
(pipe), it is desirable to shaped steel and square billet gap≤1mm.
3. side's (circle) base carries out assembly, upper-lower compacting, per point pressure >=5000kg, it is desirable to stainless with stainless steel shaped steel (circle)
Steel face and steel billet gap≤0.5mm, are first welded after compression with gas shield welding back cover, then weld full interface with submerged-arc welding.
4. two is sealed with arc welding, in port perforating after sealing, extraction air is carried out, vacuum reaches≤8 × 10-2。
5. this square billet is subjected to soaking, 1150-1250 DEG C of soaking temperature, soaking time 2h in resistance-type trolley heating furnace
After go out steel rolling.
6. being computed deflection, on the premise of ensureing that cross rib, longitudinal rib are stainless steel, selection 16mm is trimmed size.
7. stainless steel layer does not stick up skin, obscission, carbon steel-stainless steel compound thread reinforcing bar, hot rolling basic circle are successfully shut out
Size 16mm, finished product stainless steel layer thickness are 0.8mm.
8. the carbon steel-stainless steel compound thread reinforcing bar after hot rolling is through H2SO4After pickling, appearance is consistent with stainless steel, reaches
To the corrosion resistance of 304 stainless steels.
9. finished product mechanical property is after tested, as a result as follows：
| Specification | Surrender | Tension | Elongation percentage | Shrinking percentage | Bending | Ballistic work |
| Ф16 | 408 | 662 | 31.5 | 18.8 | 3a is qualified | 180/170/170 |
As a result as it can be seen that the compound thread steel bar mechanics performance reaches HRB400 requirements, and the corrosion resistance with stainless steel.
Embodiment 2
It is similar with the method for embodiment 1, but frame increases water cooling means, and the mechanical property of finished product is improved by crystal grain thinning,
Improve finished product tissue, yield strength can be made to bring up to more than 450MPa.
From the foregoing it is appreciated that although for the purpose specific embodiment that the invention has been described 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
Into.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) carbon steel as inner core and the stainless steel as outside diameter are provided；
B) carbon steel and stainless steel are subjected to assembly and are sealed using welding；
C) air in the assembly of the welded seal is extracted out so that vacuum is less than or equal to 8 × 10-2；And
D) assembly vacuumized is subjected to hot rolling, so as to obtain the carbon steel-stainless steel compound thread reinforcing bar.
2. the method as described in claim 1, wherein the inner wall of the stainless steel is bigger 0.5- than the appearance and size of the carbon steel
1mm。
3. method as claimed in claim 1 or 2, wherein when welding, bottom first uses gas shield welding back cover, surface melting welding or submerged arc
Weldering welding.
4. the method as described in any claim in claims 1 to 3, it is further included：
E) the carbon steel-stainless steel compound thread reinforcing bar obtained to step d) carries out pickling, preferably using H2SO4Carry out pickling.
5. the method as described in any claim in Claims 1-4, wherein the hot rolling is included to the group vacuumized
Base carries out soaking, and preferably soaking temperature is 1150-1250 DEG C, is then rolled again.
6. the method as described in any claim in claim 1 to 5, the wherein operation of rolling further include Water cooling.
7. the method as described in any claim in claim 1 to 6, wherein Ra≤2.54 μm of the carbon steel and straight line
Degree≤0.5mm/ is elongated.
8. the method as described in any claim in claim 1 to 6, wherein Ra≤2.54 μm of the stainless steel.
9. the carbon steel-stainless steel compound thread reinforcing bar manufactured as the method described in any claim in claim 1 to 8.
10. carbon steel-stainless steel compound thread reinforcing bar as claimed in claim 9, its mechanical property reach more than 400MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711281858.XA CN107900625A (en) | 2017-12-07 | 2017-12-07 | The compound spiral of carbon steel stainless steel and its manufacture method |
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| CN201711281858.XA CN107900625A (en) | 2017-12-07 | 2017-12-07 | The compound spiral of carbon steel stainless steel and its manufacture method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113210419A (en) * | 2021-05-08 | 2021-08-06 | 湖南三泰新材料股份有限公司 | Corrosion-resistant HRB600E composite anti-seismic steel bar and manufacturing method thereof |
| CN113695399A (en) * | 2021-09-14 | 2021-11-26 | 鞍钢股份有限公司 | Rolling method for square billet of bimetal composite large round billet |
| CN114985901A (en) * | 2022-06-17 | 2022-09-02 | 鞍钢集团北京研究院有限公司 | Method for preparing composite steel bar by adopting laser wire feeding additive manufacturing technology |
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| CN105150608A (en) * | 2015-10-23 | 2015-12-16 | 湖南三泰新材料股份有限公司 | Stainless steel/carbon steel bi-metal thread steel and composite molding technology thereof |
| CN105772507A (en) * | 2016-03-25 | 2016-07-20 | 首钢总公司 | Carbon steel and duplex stainless steel composite steel plate and production method thereof |
| CN107335971A (en) * | 2017-06-16 | 2017-11-10 | 山西太钢不锈钢股份有限公司 | The compound spiral of carbon steel stainless steel and its manufacture method |
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Patent Citations (3)
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| CN105150608A (en) * | 2015-10-23 | 2015-12-16 | 湖南三泰新材料股份有限公司 | Stainless steel/carbon steel bi-metal thread steel and composite molding technology thereof |
| CN105772507A (en) * | 2016-03-25 | 2016-07-20 | 首钢总公司 | Carbon steel and duplex stainless steel composite steel plate and production method thereof |
| CN107335971A (en) * | 2017-06-16 | 2017-11-10 | 山西太钢不锈钢股份有限公司 | The compound spiral of carbon steel stainless steel and its manufacture method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113210419A (en) * | 2021-05-08 | 2021-08-06 | 湖南三泰新材料股份有限公司 | Corrosion-resistant HRB600E composite anti-seismic steel bar and manufacturing method thereof |
| CN113695399A (en) * | 2021-09-14 | 2021-11-26 | 鞍钢股份有限公司 | Rolling method for square billet of bimetal composite large round billet |
| CN113695399B (en) * | 2021-09-14 | 2023-03-03 | 鞍钢股份有限公司 | Rolling method for square billet of bimetal composite large round billet |
| CN114985901A (en) * | 2022-06-17 | 2022-09-02 | 鞍钢集团北京研究院有限公司 | Method for preparing composite steel bar by adopting laser wire feeding additive manufacturing technology |
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Application publication date: 20180413 |