CN106964649A - Preparation method of high-corrosion-resistance bimetal composite steel bar - Google Patents
Preparation method of high-corrosion-resistance bimetal composite steel bar Download PDFInfo
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- CN106964649A CN106964649A CN201710305193.5A CN201710305193A CN106964649A CN 106964649 A CN106964649 A CN 106964649A CN 201710305193 A CN201710305193 A CN 201710305193A CN 106964649 A CN106964649 A CN 106964649A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 55
- 239000010962 carbon steel Substances 0.000 claims abstract description 55
- 238000005260 corrosion Methods 0.000 claims abstract description 47
- 230000007797 corrosion Effects 0.000 claims abstract description 44
- 239000000956 alloy Substances 0.000 claims abstract description 38
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 34
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 229910021556 Chromium(III) chloride Inorganic materials 0.000 claims description 9
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 9
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 claims description 9
- QSWDMMVNRMROPK-UHFFFAOYSA-K chromium(3+) trichloride Chemical compound [Cl-].[Cl-].[Cl-].[Cr+3] QSWDMMVNRMROPK-UHFFFAOYSA-K 0.000 claims description 9
- 239000011636 chromium(III) chloride Substances 0.000 claims description 9
- 229910000856 hastalloy Inorganic materials 0.000 claims description 9
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000002203 pretreatment Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims 2
- 238000002788 crimping Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- 238000005275 alloying Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 3
- 239000010970 precious metal Substances 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 238000005238 degreasing Methods 0.000 abstract 1
- 238000009713 electroplating Methods 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 239000004567 concrete Substances 0.000 description 6
- 238000005272 metallurgy Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000011780 sodium chloride Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000370738 Chlorion Species 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000005413 snowmelt Substances 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- 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
- B21B1/163—Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0272—Cleaning compositions
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The application discloses a preparation method of a high-corrosion-resistance bimetal composite steel bar, which comprises the following steps: preparing raw materials: preparing a corrosion-resistant alloy plate and carbon steel round steel; preparation of corrosion resistant alloy pipe: cleaning, deoiling, drying, pipe coiling and welding the corrosion-resistant alloy plate to prepare a corrosion-resistant alloy pipe; pre-alloying carbon steel round steel: cleaning, degreasing and electroplating NiCrP alloy on the outer surface of the carbon steel round steel to enable the outer surface of the carbon steel round steel to cover a prealloying layer to obtain prealloyed carbon steel round steel, assembling the prealloyed carbon steel round steel into a corrosion-resistant alloy pipe, and manufacturing a blank; and heating the blank, and rolling according to the existing rolling process to obtain the high-corrosion-resistance bimetal composite steel bar. The corrosion-resistant alloy/carbon steel bimetal composite steel bar prepared by the method can save a large amount of precious metals, and has high strength and good corrosion resistance.
Description
Technical field
The application is related to a kind of preparation method of high anticorrosive bimetal composite reinforcing steel bar, belongs to technical field of composite materials.
Background technology
Reinforcing bar is the important raw and processed materials that building trade produces armored concrete, and current reinforcing bar is produced using carbon steel material, steel
Muscle corrosion is the one of the main reasons for causing reinforced concrete structure durability to fail.As bridge spanning the sea, artificial islands and reefs etc. exist
Continuous application under marine environment, the etching condition of marine environment is more severe, and ordinary reinforced concrete structure is because of the corruption of reinforcing bar
Lose and expand, cause cracking and the failure of concrete structure.It is important at some in order to improve the decay resistance of building structure
In structure, bridge, structural steel building, the viaduct on such as seashore, what is had employs stainless steel rebar, overcomes carbon steel reinforcing bar and exists
Seawater and need in environment commonly using snow melt salt, chlorion contacts reinforcing bar through concrete, so that the drawbacks of producing corrosion.
It is also possible to avoid the calcium hydroxide in the carbon dioxide and cement in air, chemistry occurs under conditions of with the presence of water
Effect, generation calcium carbonate and water, reduce the basicity of concrete, weaken the protective effect to reinforcing bar, cause steel bar corrosion.Using resistance to
The skeleton that erosion alloy prepares concrete structure can meet corrosion resistance requirement, but corrosion resistant alloy is expensive, and intensity is not high, so that
The skeleton that it is limited separately as concrete structure is used.
Therefore, in order to overcome the above-mentioned deficiency in the presence of prior art, spy proposes this application.
The content of the invention
The purpose of the application is that there is provided a kind of preparation method of high anticorrosive bimetal composite reinforcing steel bar.
A kind of preparation method of high anticorrosive bimetal composite reinforcing steel bar, the preparation method comprises the following steps：
(1) raw material prepares：Get out corrosion resistant alloy plate and carbon steel round steel；
(2) preparation of corrosion resistant alloy pipe：By the ready corrosion resistant alloy plate of step (1) through over cleaning, oil removing, drying, volume
Corrosion resistant alloy pipe is made in the step of pipe, welding；
(3) carbon steel round steel is pre-alloyed：The outer surface of the ready carbon steel round steel of step (1) is cleaned, oil removing,
Electroplated Ni CrP alloys so that the outer surface of carbon steel round steel covers pre-alloyed layer, obtain it is pre-alloyed after carbon steel round steel, and
It is described it is pre-alloyed after carbon steel round steel diameter small 0.3-0.8mm of the internal diameter than the corrosion resistant alloy pipe obtained by step (2), institute
The length for stating carbon steel round steel is consistent with the length of the corrosion resistant alloy pipe；
(4) the carbon steel round steel after pre-alloyed obtained by step (3) is assembled in corrosion resistant alloy pipe, blank is made；
(5) blank obtained by step (4) is heated, is rolled according still further to existing rolling mill practice, obtain institute
The high anticorrosive bimetal composite reinforcing steel bar stated.
Preferably, the electroplated Ni CrP alloys refer to that in current density be 3-15A/dm2Under conditions of, electrolyte temperature
It is progress under conditions of 1-3 for 40-80 DEG C, pH value.
Preferably, the electroplate liquid includes following composition：NiCl2:15-35g/L, CrCl3·6H2O:60-100g/L,
H3PO3:10-30g/L；H3PO4:10-30g/L。
Preferably, the electroplate liquid includes following composition：NiCl2:20-30g/L, CrCl3·6H2O:70-90g/L,
H3PO3:15-25g/L；H3PO4:15-25g/L。
Preferably, the electroplate liquid includes following composition：NiCl2:25g/L, CrCl3·6H2O:80g/L, H3PO3:20g/
L；H3PO4:20g/L。
Preferably, described in step (3) cleaning, oil removing is specifically included：
Pre-treatment step is carried out to the outer surface of described carbon steel round steel for 10% sodium hydroxide solution with mass fraction,
Under 70 DEG C of water temperatures, preceding cleaning is carried out to the outer surface greasy dirt of the carbon steel round steel, soak time is 10~20min；Then use
Mass fraction for 10% HCl/water solution etch 20min at normal temperatures；Finally use deionized water rinsing dry for standby.
Preferably, in step (5), the heating refers to be heated to temperature for 1000~1200 DEG C so that middle carbon steel
Round steel fusing diffusion.
Preferably, the internal diameter of the carbon steel round steel after pre-alloyed described in step (3) is than the anti-corrosion conjunction obtained by step (2)
The small 0.5mm of diameter of golden pipe.
Preferably, the thickness of the pre-alloyed layer described in step (3) is 0.2mm.
Preferably, the corrosion resistant alloy plate includes stainless steel, Hastelloy and titanium alloy.
The beneficial effect of the application is：The corrosion resistant alloy prepared using the present processes/carbon steel bimetallic composite reinforcing steel bar
A large amount of precious metals can be saved, ocean engineering cost is reduced, and intensity is high, corrosion resistance is good, has weight for ocean development
Big economic and social benefit.
Brief description of the drawings
Fig. 1 is the preparation technology flow chart of the high anticorrosive bimetal composite reinforcing steel bar of the application；
Fig. 2 is the cross-sectional view of the high anticorrosive bimetal composite reinforcing steel bar of the application；
Fig. 3 is the metallographic structure figure of the high anticorrosive bimetal composite reinforcing steel bar of the gained of embodiment 1；
Fig. 4 is the finished figure of the high anticorrosive bimetal composite reinforcing steel bar of the gained of embodiment 1.
Embodiment
The application is described in detail with reference to embodiment, but the application is not limited to these embodiments.
Unless otherwise instructed, the raw material and catalyst in embodiments herein are bought by commercial sources.
Embodiment 1：
Stainless steel/carbon bimetallic composite anticorrosive reinforcing bar, a diameter of 14mm of reinforcing bar, the chemical composition of middle reinforcing bar
Q235 steel, middle metallurgy layer is ternary alloy three-partalloy, and outside is thickness 2mm 316L stainless steels, and combination is metallurgical binding.
(1) the Q235 carbon steel round steel prepared from existing steel rolling process, length 5m, diameter 14mm pole.
(2) preparation technology from anti-corrosion coating is prepared into 316L stainless-steel pipes, and length is 5m, the internal diameter of steel pipe
14.5mm, external diameter 16.5mm.
(3) with the sodium hydroxide solution pre-treatment step that mass fraction is 10%, under 70 DEG C of water temperatures, to billet material table
Face greasy dirt is cleaned before carrying out, and soak time is 10~20min.With the HCl/water solution etch at normal temperatures that mass fraction is 10%
20min, removes billet surface oxide skin.Dried with deionized water rinsing, drying is kept, using electroplated Ni CrP techniques in Qian Chu
Carbon steel surface after reason prepares the thick pre-alloyed layers of one layer of 0.2mm.
Electroplated Ni CrP alloying technologys are as follows：
NiCl2:25g/L
CrCl3●6H2O:80g/L
H3PO3:20g/L
H3PO4:20g/L
pH:1-3
T:40-80℃
Current density：3-15A/dm2；
(4) carbon steel after will be pre-alloyed is assembled up with corrosion resistant alloy pipe, and blank is made.
(5) stepping stove heat is used to blank, is heated to 1000~1200 DEG C, make middle metallurgy layer fusing diffusion.By height
Bimetallic composite blank under temperature is rolled by existing rolling mill practice, realizes that the metallurgy of corrosion resistant alloy and carbon steel is combined.
The stainless steel/carbon bimetallic composite anticorrosive reinforcing bar produced as stated above, centre is carbon steel plug, and outside is
The corrosion-resistant alloy layer of corrosion resistant alloy material formation, can reach the corrosion resistance of stainless steel while keeping the high intensity of carbon steel, production
Method is simple, good appearance, and functional, its tensile strength sigma b=630MPa, and is 3.5% in mass percent concentration
Corrosion rate in NaCl solution is less than 0.05mm/a.
Embodiment 2：
Hastelloy/carbon steel bimetallic composite reinforcing steel bar, a diameter of 14mm of reinforcing bar, the chemical composition of middle carbon steel is 45
Steel, outside is thickness 2mm HASTELLOY B-2 Hastelloys, and combination is metallurgical binding.
(1) the 45 steel round steel reinforcing bars prepared from existing rolling mill practice, length 5m, diameter 25mm.
(2) preparation technology from the anti-corrosion coating in the present invention prepares Hastelloy pipe, and length is 5m, compo pipe
Internal diameter is 25.5mm, and external diameter is 27.5mm.
(3) with the sodium hydroxide solution pre-treatment step that mass fraction is 10%, under 70 DEG C of water temperatures, to billet material table
Face greasy dirt is cleaned before carrying out, and soak time is 10~20min.With the HCl/water solution etch at normal temperatures that mass fraction is 10%
20min, removes billet surface oxide skin.Dried with deionized water rinsing, keep drying.Using electroplated Ni CrP techniques in Qian Chu
Carbon steel surface after reason prepares the thick pre-alloyed layers of one layer of 0.2mm.
Electroplated Ni CrP alloying technologys are as follows：
NiCl2:35g/L
CrCl3●6H2O:100g/L
H3PO3:30g/L
H3PO4:30g/L
pH:1-3
T:40-80℃
Current density：3-15A/dm2；
(4) carbon steel after will be pre-alloyed is assembled up with compo pipe, and blank is made.
(5) blank is heated in induction furnace, is heated to 1000~1200 DEG C, make middle metallurgy layer fusing diffusion.
Bimetallic composite blank under high temperature is rolled by existing rolling mill practice, the metallurgy of Hastelloy layer and 45 steel is realized
With reference to.
The Hastelloy produced as stated above/carbon steel bimetallic composite anticorrosive reinforcing bar, centre is carbon steel plug, outside
For the corrosion-resistant alloy layer of Hastelloy formation, the corrosion resistance of Hastelloy can be reached, while the high intensity of carbon steel is kept, production
Method is simple, good appearance, function admirable, its tensile strength sigma b=810MPa, in the NaCl that mass percent concentration is 3.5%
Corrosion rate in solution is less than 0.01mm/a.
Embodiment 3：
Titanium alloy/carbon steel bimetallic composite reinforcing steel bar, a diameter of 54mm of reinforcing bar, the part of reinforcing bar is carbon steel core,
Outside is thickness 2mm TC4 titanium alloys, and combination is metallurgical binding.
(1) the Q235 carbon steel reinforcing bars prepared from existing steel rolling process, length is 5m, diameter 14mm.
(2) TC4 titanium alloy tubes are prepared from the tube-making process in the present invention, length is 5m, and cross section is internal diameter diameter
For 54.5mm concentric circles, external diameter is 56.5mm.
(3) with the sodium hydroxide solution pre-treatment step that mass fraction is 10%, under 70 DEG C of water temperatures, to billet material table
Face greasy dirt is cleaned before carrying out, and soak time is 10~20min.With the HCl/water solution etch at normal temperatures that mass fraction is 10%
20min, removes billet surface oxide skin.Dried with deionized water rinsing, keep drying.Using electroplated Ni CrP techniques in Qian Chu
Carbon steel surface after reason prepares the thick pre-alloyed layers of one layer of 0.2mm.
Electroplated Ni CrP alloying technologys are as follows：
NiCl2:15g/L
CrCl3●6H2O:60g/L
H3PO3:10g/L
H3PO4:10g/L
pH:1-3
T:40-80℃
Current density：3-15A/dm2；
(4) carbon steel after will be pre-alloyed is assembled up with compo pipe, and blank is made.
(5) stove heat is answered to blank use feeling, is heated to 1000~1200 DEG C, make middle metallurgy layer fusing diffusion.By height
Bimetallic composite blank under temperature is rolled by existing rolling mill practice.Realize the metallurgical binding of corrosion resistant alloy and carbon steel.
The titanium produced as stated above/carbon steel bimetallic composite reinforcing steel bar, centre is carbon steel plug, and outside is titanium alloy conduct
Corrosion-resistant alloy layer.The corrosion resistance of titanium alloy can be reached while keeping the high intensity of carbon steel, production method is simple, good appearance,
Functional, its tensile strength sigma b=630MPa is small for the corrosion rate in 3.5% NaCl solution in mass percent concentration
In 0.003mm/a.
It is described above, only it is several embodiments of the application, any type of limitation is not done to the application, although this Shen
Please disclosed as above with preferred embodiment, but and be not used to limit the application, any those skilled in the art are not taking off
In the range of technical scheme, make a little variation using the technology contents of the disclosure above or modification is equal to
Case study on implementation is imitated, is belonged in the range of technical scheme.
Claims (10)
1. a kind of preparation method of high anticorrosive bimetal composite reinforcing steel bar, it is characterised in that the preparation method comprises the following steps：
(1) raw material prepares：Get out corrosion resistant alloy plate and carbon steel round steel；
(2) preparation of corrosion resistant alloy pipe：By the ready corrosion resistant alloy plate of step (1) through over cleaning, oil removing, drying, pipe crimping, weldering
Corrosion resistant alloy pipe is made in the step of connecing；
(3) carbon steel round steel is pre-alloyed：The outer surface of the ready carbon steel round steel of step (1) is cleaned, oil removing, plating
NiCrP alloys so that the outer surface of carbon steel round steel covers pre-alloyed layer, obtain it is pre-alloyed after carbon steel round steel, it is and described
The internal diameter of carbon steel round steel after pre-alloyed is than the small 0.3-0.8mm of diameter of the corrosion resistant alloy pipe obtained by step (2), the carbon
The length of steel round steel is consistent with the length of the corrosion resistant alloy pipe；
(4) the carbon steel round steel after pre-alloyed obtained by step (3) is assembled in corrosion resistant alloy pipe, blank is made；
(5) blank obtained by step (4) is heated, rolled according still further to existing rolling mill practice, obtain described
High anticorrosive bimetal composite reinforcing steel bar.
2. the preparation method of high anticorrosive bimetal composite reinforcing steel bar according to claim 1, it is characterised in that the plating
NiCrP alloys refer to that in current density be 3-15A/dm2Under conditions of, the bar that electrolyte temperature is 40-80 DEG C, pH value is 1-3
Carried out under part.
3. the preparation method of high anticorrosive bimetal composite reinforcing steel bar according to claim 2, it is characterised in that the electrolyte
Include following composition：NiCl2:15-35g/L, CrCl3·6H2O:60-100g/L, H3PO3:10-30g/L；H3PO4:10-
30g/L。
4. the preparation method of high anticorrosive bimetal composite reinforcing steel bar according to claim 3, it is characterised in that the electroplate liquid
Including following composition：NiCl2:20-30g/L, CrCl3·6H2O:70-90g/L, H3PO3:15-25g/L；H3PO4:15-25g/L。
5. the preparation method of high anticorrosive bimetal composite reinforcing steel bar according to claim 4, it is characterised in that the electroplate liquid
Including following composition：NiCl2:25g/L, CrCl3·6H2O:80g/L, H3PO3:20g/L；H3PO4:20g/L。
6. the preparation method of the high anticorrosive bimetal composite reinforcing steel bar according to any one in claim 1-5, its feature exists
In cleaning, oil removing described in step (3) are specifically included：
Pre-treatment step is carried out to the outer surface of described carbon steel round steel for 10% sodium hydroxide solution with mass fraction, 70
Under DEG C water temperature, cleaned before being carried out to the outer surface greasy dirt of the carbon steel round steel, soak time is 10~20min；Then quality is used
Fraction for 10% HCl/water solution etch 20min at normal temperatures；Finally use deionized water rinsing dry for standby.
7. the preparation method of the high anticorrosive bimetal composite reinforcing steel bar according to any one in claim 1-5, its feature exists
In in step (5), the heating refers to be heated to temperature for 1000~1200 DEG C so that middle carbon steel round steel fusing diffusion.
8. the preparation method of the high anticorrosive bimetal composite reinforcing steel bar according to any one in claim 1-5, its feature exists
In, it is pre-alloyed described in step (3) after carbon steel round steel internal diameter it is smaller than the diameter of the corrosion resistant alloy pipe obtained by step (2)
0.5mm。
9. the preparation method of the high anticorrosive bimetal composite reinforcing steel bar according to any one in claim 1-5, its feature exists
In the thickness of the pre-alloyed layer described in step (3) is 0.2mm.
10. the preparation method of the high anticorrosive bimetal composite reinforcing steel bar according to any one in claim 1-5, its feature exists
In the corrosion resistant alloy plate includes stainless steel, Hastelloy and titanium alloy.
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| CN201710305193.5A CN106964649A (en) | 2017-05-03 | 2017-05-03 | Preparation method of high-corrosion-resistance bimetal composite steel bar |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109277502A (en) * | 2018-11-08 | 2019-01-29 | 南京工业大学 | Bimetal composite spring and preparation method thereof |
| CN109518178A (en) * | 2018-11-08 | 2019-03-26 | 南京工业大学 | Preparation method of bimetal composite round steel |
| CN109570257A (en) * | 2018-11-08 | 2019-04-05 | 南京工业大学 | Bimetal composite flat steel, strip steel and preparation method thereof |
| CN112090955A (en) * | 2020-09-04 | 2020-12-18 | 新疆八一钢铁股份有限公司 | Composite rolling method of corrosion-resistant spring flat steel |
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| CN109518178A (en) * | 2018-11-08 | 2019-03-26 | 南京工业大学 | Preparation method of bimetal composite round steel |
| CN109570257A (en) * | 2018-11-08 | 2019-04-05 | 南京工业大学 | Bimetal composite flat steel, strip steel and preparation method thereof |
| CN112090955A (en) * | 2020-09-04 | 2020-12-18 | 新疆八一钢铁股份有限公司 | Composite rolling method of corrosion-resistant spring flat steel |
| 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 |
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