CN211080780U - Corrosion-resistant titanium-steel composite steel bar - Google Patents
Corrosion-resistant titanium-steel composite steel bar Download PDFInfo
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- CN211080780U CN211080780U CN201920808678.0U CN201920808678U CN211080780U CN 211080780 U CN211080780 U CN 211080780U CN 201920808678 U CN201920808678 U CN 201920808678U CN 211080780 U CN211080780 U CN 211080780U
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Abstract
The utility model discloses a corrosion-resistant titanium-steel composite reinforcement. The corrosion-resistant titanium-steel composite steel bar comprises a carbon steel core and a titanium coating wrapped on the surface of the carbon steel core, and the carbon steel core and the titanium coating are metallurgically bonded. The corrosion-resistant titanium-steel composite reinforcing steel bar provided by the utility model has excellent corrosion resistance, and especially can prevent chloride ions in the marine environment from corroding far beyond stainless steel bars; and the mechanical property is close to that of common carbon steel. The reinforcing steel bar adopts a composite structure, so that precious metal resources can be saved, and the cost is reduced.
Description
Technical Field
The utility model relates to a bimetal combined material technical field, in particular to corrosion-resistant titanium-steel composite reinforcement.
Background
With the development of marine economy in China and the construction requirements of remote islands, the demand for construction of reinforced concrete projects on offshore islands increases. The development of China on oceans enters the golden period, but the severe ocean environment leads the concrete structure with strong durability to be generally recognized to be damaged prematurely due to insufficient durability, and the development of China's ocean economy is severely restricted.
The reinforcing steel bar is an important raw material of reinforced concrete, the reinforcing steel bar is produced by adopting a carbon steel material at present, and the corrosion of the reinforcing steel bar is one of the main reasons for the durability failure of a reinforced concrete structure. In the marine environment, chloride ion corrosion is the most prominent factor causing corrosion of steel bars. Chloride ions in the seawater sand chemically react with the steel bars to cause corrosion and expansion of the steel bars along the steel bars, so that concrete cracks appear, the durability of the concrete structure is reduced, and the design service life of the concrete structure is prolonged.
In order to improve the corrosion resistance of the building engineering and sea-island marine defense engineering in coastal areas, measures are taken to prevent the carbon steel bars from being corroded by chloride ions which permeate concrete and contact the steel bars in seawater and an environment which needs to use snow melting salt frequently. The technical measures adopted in the prior art mainly comprise: coated steel bars or special steel bars such as stainless steel bars are used.
The construction of the epoxy coating steel bar is complex, the anticorrosion effect depends on the construction quality control to a great extent, and the large-scale application of the epoxy coating steel bar is limited. The corrosion resistance of the stainless steel bar is greatly improved compared with the common steel bar, but the stainless steel bar has low yield strength and high price, the reinforcement ratio needs to be increased in actual use to ensure the strength, and the cost of the method is high.
In view of the above, it is necessary to provide a new reinforcing bar structure to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a corrosion-resistant titanium-steel composite steel bar, which has excellent corrosion resistance and mechanical property close to that of common carbon steel; the reinforcing steel bar adopts a composite structure, so that precious metal resources can be saved, and the cost is reduced.
In order to solve the above problem, the technical scheme of the utility model is as follows:
the corrosion-resistant titanium-steel composite steel bar comprises a carbon steel core and a titanium coating wrapped on the surface of the carbon steel core, wherein the carbon steel core and the titanium coating are metallurgically bonded.
Further, the corrosion-resistant titanium-steel composite steel bar is a ribbed steel bar or a plain steel bar.
Further, the carbon steel core is made of low-carbon steel or low-alloy steel.
Further, the thickness of the titanium coating is 0.2-1 mm.
Further, the carbon steel core part takes a carbon steel bar as a raw material, the titanium coating layer takes a titanium pipe as a raw material, and the corrosion-resistant titanium-steel composite steel bar is prepared by a hot rolling process after the carbon steel bar and the titanium pipe are assembled.
Further, the titanium pipe is consistent with the carbon steel bar in cross-sectional shape.
Furthermore, the cross section of the carbon steel bar is square or round, and the cross section of the titanium pipe is correspondingly square or round.
Further, the side length or the outer diameter of the cross section of the carbon steel bar is 120-180 mm.
Further, the length of the carbon steel bar stock is 3-12 m.
Compared with the prior art, the utility model provides a corrosion-resistant titanium-steel composite reinforcement, beneficial effect lies in:
the corrosion-resistant titanium-steel composite reinforcing steel bar provided by the utility model has the advantages that the surface of the common reinforcing steel bar is coated with the titanium coating, so that the coated reinforcing steel bar has better corrosion resistance, and the reinforced concrete is ensured to have excellent resistance to corrosion of ocean chlorides; and the main material of the composite steel bar is carbon steel, so that the composite steel bar has the same mechanical properties as common steel bars, and the reinforced concrete can have higher compressive strength, tensile strength and yield strength without additionally increasing the amount of reinforcing steel bars.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a corrosion-resistant titanium-steel composite reinforcing bar provided by the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the corrosion-resistant titanium-steel composite steel bar provided by the present invention;
FIG. 3 is a schematic structural diagram of a composite steel billet according to the present invention;
FIG. 4 is a schematic structural view of the composite steel slab of FIG. 3;
fig. 5 is another schematic structural view of the composite billet shown in fig. 3.
Detailed Description
In order to make the technical solution in the embodiments of the present invention better understood and make the above objects, features and advantages of the present invention more obvious and understandable, the following description of the embodiments of the present invention is provided with reference to the accompanying drawings.
It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Please refer to fig. 1 and fig. 2 in combination, wherein fig. 1 is a schematic structural diagram of an embodiment of the corrosion-resistant titanium-steel composite steel bar according to the present invention; fig. 2 is a schematic structural diagram of another embodiment of the corrosion-resistant titanium-steel composite steel bar provided by the present invention. The utility model discloses a corrosion-resistant titanium-steel composite reinforcement 100 includes carbon steel core 11 and wraps up in the titanium coating 12 on carbon steel core 11 surface, wherein carbon steel core 11 combines with titanium coating 12 metallurgy. The corrosion-resistant titanium-steel composite reinforcement bar 100 may be a ribbed reinforcement bar (as shown in fig. 1) or a round reinforcement bar (as shown in fig. 2).
The utility model discloses in, carbon steel core 11 chooses for use carbon steel bar to obtain through surface treatment, and used carbon steel bar can be twisted steel or plain steel muscle. The carbon steel bar material used for the carbon steel core 11 is low carbon steel or low alloy steel, such as grades of HRB400, HRB400E, HRB500E and the like for rolling deformed steel bars, grades of HPB300 and the like for rolling round steel.
The length of the carbon steel bar is 3-12m, the cross section is round or square, the corresponding outer diameter or side length is 120-180mm, and the length is determined according to the design requirement.
In the utility model, the titanium coating 12 is made of titanium material; preferably, the titanium cladding 12 is formed from a seamless titanium tube; specifically, the titanium pipe is sleeved outside the carbon steel bar, and then the titanium pipe is formed through a hot rolling process. After the hot rolling process, the titanium clad layer 12 is metallurgically bonded to the carbon steel core 11, and the thickness of the formed titanium clad layer 12 is 0.2-1 mm. The seamless titanium tube can be made of pure titanium tube or titanium alloy tube, wherein the grade of the pure titanium tube is TA1, TA2, TA3 and the like, and the grade of the titanium alloy is TC4, TA7 and the like.
The cross section of the titanium pipe used for the titanium coating 12 is consistent with that of the carbon rod bar, and is corresponding to that of the carbon steel bar listed above, the cross section of the titanium pipe is circular or square, the length of the titanium pipe is consistent with that of the carbon steel bar, and is 3-12m, and the titanium pipe is specifically determined according to design requirements. In the production and preparation process, the seamless titanium pipe is required to be directly sleeved on the surface of the carbon steel core part, a certain gap is formed between the seamless titanium pipe and the carbon steel core part, and specifically, the gap is 0.1-2 mm.
The utility model also provides a preparation method of corrosion-resistant titanium-steel composite steel bar, and the preparation method comprises the following steps:
step S1, providing a carbon steel bar 21 and carrying out surface treatment on the carbon steel bar;
specifically, the scale on the surface of the carbon steel bar 21 is removed by one of shot blasting, acid pickling or machining.
Step S2, providing the titanium tube 22, and performing surface treatment on the inner surface thereof;
specifically, the titanium pipe is a seamless titanium pipe, and the inner surface of the titanium pipe is subjected to scale removing treatment by adopting a shot blasting or acid pickling process.
Step S3, assembling a carbon steel bar into an inner hole of the titanium tube to form a composite steel billet 200, vacuumizing the composite steel billet 200, and welding and sealing two ends of the composite steel billet by adopting titanium plates 23 in a vacuum environment to form a closed vacuum environment in a gap between the carbon steel bar and the titanium tube;
specifically, in the composite steel billet, the clearance formed by the carbon steel bar and the titanium pipe is 0.1-2 mm; in the vacuumizing treatment stage, the composite billet is placed into a vacuum chamber for vacuumizing, and the vacuum degree is not lower than 0.001 Pa; when two ends of the composite steel billet are welded and sealed, a titanium plate is paved on the end part of the composite steel billet respectively, and the titanium plate 23 is welded with the titanium pipe 22, so that a gap is not left between the titanium pipe 22 and the titanium plate 23, and a sealed vacuum environment is formed in a gap between the carbon steel bar and the titanium pipe. With reference to fig. 3 to 5, fig. 3 is a schematic structural diagram of a composite steel billet according to the present invention; FIG. 4 is a schematic structural view of the composite steel slab of FIG. 3; FIG. 5 is a schematic view of another configuration of the composite steel blank of FIG. 3; the composite steel billet shown in fig. 4 is a composite round billet, and the composite steel billet shown in fig. 5 is a composite square billet.
Step S4, heating the composite steel billet 200 to 980-1100 ℃ in weak oxidizing atmosphere or under the protection of inert gas, wherein the heating time is 3-5 h;
the internal and external temperature of the composite steel billet can be ensured to be uniform through the specific heating temperature and heating time, so that the crystal phase at the combination interface is uniform.
Wherein, when the oxygen is in the weak oxidizing atmosphere, the oxygen volume content of the weak oxidizing atmosphere is less than or equal to 5 percent.
And step S5, hot rolling to obtain the corrosion-resistant titanium-steel composite steel bar.
Specifically, the heated composite steel billet is hot-rolled by using the existing hot rolling process, and the specific process steps are not described herein again.
In this embodiment, according to the core and cladding materials of the composite steel billet 200, the initial rolling temperature of the hot rolling process is controlled to be 950-; the finishing temperature is controlled to be 850-950 ℃.
The corrosion-resistant titanium-steel composite steel bar obtained by the hot rolling process comprises a carbon steel core part formed by carbon steel bar stock and a titanium coating layer formed by a titanium pipe, wherein the thickness of the titanium coating layer is 0.2-1 mm.
The corrosion-resistant steel composite reinforcement bar and the preparation method thereof according to the present invention will be described in detail through specific embodiments.
Example 1
In the embodiment, a pure titanium pipe and an HRB400 round blank are compounded and finally rolled into the bimetal thread steel bar with the diameter of phi 25 mm. Referring to fig. 3 and 4 in combination, the selected carbon steel bar stock 21 and titanium pipe 22 forming the titanium cladding are both circular in configuration.
In the embodiment, the titanium pipe is made of pure titanium, the specific size of the titanium pipe is phi 150mm × 5mm × 6 m (the length of the outer diameter × wall thickness ×), the carbon steel bar 21 of the core is made of a blank used for producing HRB400 deformed steel bar, the specific size of the carbon steel bar 21 is phi 139mm × 6 m (the length of the outer diameter ×), and the gap between the carbon steel bar 21 and the titanium pipe 22 blank is 0.5 mm/edge.
The surface treatment of the material comprises the steps of firstly removing flash burrs on the inner surface of a titanium pipe blank, then carrying out acid cleaning treatment, finally cleaning with acetone, turning a carbon steel bar at the core part to remove oxide skin on the surface, ensuring that the steel core blank has the size phi of 139mm × 6 m, and then cleaning with acetone.
Carbon steel bar stock is put into the titanium pipe to form the titanium-steel bimetal composite billet 200.
Placing the assembled composite billet 200 in a vacuum chamber, and vacuumizing to ensure that the vacuum degree is 0.0001 Pa; respectively paving a titanium plate 23 at the end part, and then welding the titanium plate 23 and the titanium pipe in a vacuum environment to ensure that no gap is left between the titanium pipe 22 and the titanium plate 23, so that a gap between the carbon steel bar 21 and the titanium pipe 22 forms a closed vacuum environment.
The composite billet 200 is placed in a heating furnace to be heated in a weak oxygen environment, the oxygen volume content of the weak oxidizing atmosphere is less than or equal to 5 percent, the heating time is 4 hours, and the tapping temperature is controlled at 1060 ℃.
Hot rolling and rolling into corrosion-resistant titanium-steel composite steel bar with the diameter of phi 25mm, wherein the thickness of the titanium coating is 0.83 mm. Wherein the initial rolling temperature is controlled to be 980 ℃, and the final rolling temperature is controlled to be 850 ℃.
Example 2
This example prepared a composite rebar of the same type as example 1. The preparation process is basically the same, and the difference is that:
heating the composite steel billet under the protection of inert gas; and the heating temperature was controlled to 980 ℃.
Example 3
This example prepared a composite rebar of the same type as example 1. The preparation process is basically the same, and the difference is that:
the heating temperature of the composite steel billet in the heating furnace is controlled to be 1100 ℃.
The corrosion-resistant titanium-steel composite steel bar provided by the utility model has better corrosion resistance because the coating material is titanium; and the oxidation resistance of the titanium material is superior to that of austenitic stainless steel, and the corrosion resistance in wet chlorine is far superior to that of other metals. Therefore, the utility model provides a corrosion-resistant titanium-steel composite reinforcement has the significance to improving the building engineering quality, increase of service life.
The utility model provides a corrosion-resistant titanium-steel composite reinforcement has better mechanical properties, and accessible tensile test and clod wash test explain. The mechanical property test results of the composite steel bar are as follows:
test result of mechanical property of composite steel bar
Wherein R isElDenotes the lower yield strength, RmTensile strength is shown, and A is elongation after fracture.
The utility model provides a corrosion-resistant titanium-steel composite reinforcement, its tensile test fracture department all does not appear delaminating, combines phenomenons such as bad, explains the two to combine for the metallurgy, and bonding performance is excellent.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The embodiments of the present invention are described in detail with reference to the drawings, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.
Claims (9)
1. The corrosion-resistant titanium-steel composite steel bar is characterized by comprising a carbon steel core and a titanium coating layer wrapping the surface of the carbon steel core, wherein the carbon steel core is metallurgically bonded with the titanium coating layer; the titanium coating is prepared by adopting a pure titanium pipe or a titanium alloy pipe.
2. The corrosion-resistant titanium-steel composite rebar of claim 1, wherein the corrosion-resistant titanium-steel composite rebar is a ribbed rebar or a plain round rebar.
3. The corrosion-resistant titanium-steel composite reinforcing bar according to claim 1, wherein the carbon steel core is made of low carbon steel or low alloy steel.
4. The corrosion-resistant titanium-steel composite reinforcement according to claim 1, wherein the thickness of the titanium coating is 0.2-1 mm.
5. The corrosion-resistant titanium-steel composite steel bar according to any one of claims 1 to 4, wherein the carbon steel core is made of a carbon steel bar stock, the titanium coating is made of a titanium pipe, and the corrosion-resistant titanium-steel composite steel bar is prepared by a hot rolling process after the carbon steel bar stock and the titanium pipe are assembled.
6. The corrosion resistant titanium-steel composite rebar of claim 5, wherein the titanium tube conforms to the cross-sectional shape of the carbon steel bar.
7. The corrosion-resistant titanium-steel composite steel bar according to claim 6, wherein the carbon steel bar has a square or circular cross-sectional shape, and the titanium tube has a corresponding square or circular cross-sectional shape.
8. The corrosion-resistant titanium-steel composite steel bar as recited in claim 7, wherein the carbon steel bar has a side length or an outer diameter of 120-180 mm.
9. The corrosion-resistant titanium-steel composite rebar of claim 8, wherein the carbon steel bar has a length of 3-12 m.
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| CN201920808678.0U CN211080780U (en) | 2019-05-30 | 2019-05-30 | Corrosion-resistant titanium-steel composite steel bar |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110181231A (en) * | 2019-05-30 | 2019-08-30 | 湖南三泰新材料股份有限公司 | A kind of corrosion-resistant titanium-steel composite reinforcing steel bar and preparation method thereof |
| CN113417406A (en) * | 2021-06-18 | 2021-09-21 | 湖南湘投金天科技集团有限责任公司 | Beam structure and preparation method thereof |
| CN113622597A (en) * | 2021-08-20 | 2021-11-09 | 湖南三泰新材料股份有限公司 | Stainless steel composite finish-rolled twisted steel and manufacturing method thereof |
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2019
- 2019-05-30 CN CN201920808678.0U patent/CN211080780U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110181231A (en) * | 2019-05-30 | 2019-08-30 | 湖南三泰新材料股份有限公司 | A kind of corrosion-resistant titanium-steel composite reinforcing steel bar and preparation method thereof |
| CN113417406A (en) * | 2021-06-18 | 2021-09-21 | 湖南湘投金天科技集团有限责任公司 | Beam structure and preparation method thereof |
| CN113622597A (en) * | 2021-08-20 | 2021-11-09 | 湖南三泰新材料股份有限公司 | Stainless steel composite finish-rolled twisted steel and manufacturing method thereof |
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