CN110961455A - Preparation process of titanium steel composite coil - Google Patents
Preparation process of titanium steel composite coil Download PDFInfo
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- CN110961455A CN110961455A CN201911187606.XA CN201911187606A CN110961455A CN 110961455 A CN110961455 A CN 110961455A CN 201911187606 A CN201911187606 A CN 201911187606A CN 110961455 A CN110961455 A CN 110961455A
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- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
-
- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The embodiment of the invention provides a preparation process of a titanium steel composite coil, which comprises the steps of firstly carrying out welding batch processing on a titanium plate and a steel plate, vacuumizing and maintaining pressure to obtain a blank, and then carrying out heat preservation, rough rolling and hot continuous rolling to finally obtain the titanium steel composite coil. The composite strip coil prepared by the preparation process provided by the embodiment of the invention has the advantages that the deformation is very large after rough rolling and finish rolling, the bonding rate reaches 100%, the dimensional precision of the whole coil reaches +/-0.3 mm, and the surface quality is good. In addition, by adopting the preparation process provided by the embodiment of the invention, the interface reaction is controllable, and the shear strength reaches 230 MPa. The appropriate temperature and time control avoids the formation of brittle phase ferrotitanium intermetallic compounds to influence the shear strength of the composite plate, and can be widely applied to consumer product markets, electric power, chemical engineering, ocean engineering, cold rolling base materials and the like.
Description
Technical Field
The invention belongs to the technical field of metal laminated composite plates, and particularly relates to a preparation process of a titanium steel composite roll.
Background
The metal laminated composite board is prepared by two or more metal boards with different properties through a special composite processing method, combines the respective advantages of two or more metal components, and can obtain comprehensive properties which are not possessed by any single metal. The performance characteristics of the metal laminated composite board are that the physical properties, chemical properties, mechanical properties and the like of two or more different metal characteristics are utilized and fully exerted by reasonably selecting each component and adopting a proper preparation process, and the metal laminated composite material capable of meeting different performance requirements is produced.
At present, the common metal composite plates in actual industrial production and scientific research and research are as follows: stainless steel composite panels, nickel/steel composite panels, copper/steel composite panels, titanium/aluminum composite panels, titanium/steel composite panels, and the like.
Titanium and titanium alloy have outstanding advantages such as specific strength height, density are low, good toughness and corrosion resistance, widely apply to fields such as aerospace, petrochemical industry, ocean, but its cost is higher, and stainless steel is cheap, has good plasticity, weldability and mechanical properties etc.. The titanium/steel layered composite board prepared by rolling, explosion connection, explosion and rolling can fully play the advantages of the titanium/steel layered composite board, make up the respective defects, save the use of titanium and titanium alloy and reduce the cost of materials.
At present, the titanium steel composite plate is a medium plate, a reversible rolling mill is used for sheet (block) rolling, tension-free rolling is adopted, the production efficiency is low, thin plates and strip coils cannot be produced, the yield is low, and the application of the titanium steel composite plate is limited.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a preparation process of the titanium steel composite coil, the preparation process adopts a hot continuous rolling technology, the composite plate with the thickness of 1.5-10.0 mm can be prepared, the production efficiency is high, and the yield is improved.
According to the preparation process of the titanium steel composite coil, the preparation process comprises the following steps:
s1: carrying out welding batch processing on the titanium plate and the steel plate, vacuumizing and maintaining pressure to obtain a blank;
s2: heating the assembly, and carrying out rough rolling to obtain a rough rolling blank;
s3: and (4) carrying out hot continuous rolling on the rough rolling blank and then coiling to obtain the titanium steel composite coil.
In the preparation process, the thickness of the titanium plate is 0.5-4 mm, and the thickness of the steel plate is 1-9 mm.
The thickness of the titanium steel composite roll is 1.5-10.0 mm.
The preparation process further comprises the step of carrying out surface treatment on the steel plate and the titanium plate before the step S1, specifically, carrying out grinding on the steel plate, and carrying out acid washing after grinding on the titanium plate, so that the surface of the joint surface can be ensured to be clean, and the thickness ratio of the steel plate to the titanium plate is consistent with the required ratio of a finished product coil.
The preparation process further comprises the steps of trimming the titanium steel composite coil, rewinding and stripping, carrying out heat treatment, and carrying out surface continuous grinding treatment on the titanium surface and the steel surface after the step S3.
Suitable grades for the above preparation process include Q235, Q345, TA1, TA2, TA8 and TA 9.
The preparation process of the titanium steel composite coil according to the embodiment of the invention at least has the following technical effects:
the existing multilayer composite material, especially the rolling composite and hot continuous rolling technology of the titanium steel composite plate is not mature, the hot rolling temperature of the titanium steel composite plate is less than or equal to 940 ℃, the titanium steel composite plate belongs to low-temperature rolling for steel, the deformation resistance of the material is large, meanwhile, the titanium material and the steel have different stress deformation resistances, the rolling stability is difficult to control, and the technical requirement on hot continuous rolling is higher. In the technical scheme of the embodiment of the invention, the key points are to reasonably distribute the deformation of hot rolling passes and control the temperature in the rolling process.
The composite strip coil prepared by the preparation process provided by the embodiment of the invention has the advantages that the deformation is very large after rough rolling and finish rolling, the bonding rate reaches 100%, the dimensional precision of the whole coil reaches +/-0.3 mm, and the surface quality is good.
The preparation process of the embodiment of the invention has controllable interface reaction and the shear strength of 230 MPa. The appropriate temperature and time control avoids the formation of brittle phase ferrotitanium intermetallic compounds to influence the shear strength of the composite plate, and can be widely applied to consumer product markets, electric power, chemical engineering, ocean engineering, cold rolling base materials and the like.
According to some embodiments of the invention, the pressure of the dwell pressure is ≦ 10-2Pa。
According to some embodiments of the invention, the dwell time is 20 to 30 hours.
The purpose of pressure maintaining after vacuum pumping is to prevent the titanium plate and air in the heating process of the blank from reacting to form oxides, so that the titanium/steel cannot be jointed or the jointing strength is insufficient.
According to some embodiments of the invention, the temperature of the heat preservation treatment is 900-940 ℃.
According to some embodiments of the invention, the time of the heat preservation treatment is 2-8 hours.
Due to the fact that the titanium plate and the steel plate are different in heat conductivity coefficient, the steel plate and the titanium plate can be heated more uniformly due to the heat preservation temperature and the heat preservation time.
According to some embodiments of the invention, the temperature of the rough rolling is 850-900 ℃.
According to some embodiments of the invention, the number of passes of the rough rolling is 5 to 7.
The number of rough rolling passes is 5-7, the deformation of the passes is large, and the deformation of the first pass is more than or equal to 20%.
According to some embodiments of the invention, the thickness of the cogged ingot is 30 to 80 mm.
According to some embodiments of the invention, the pass deformation of the hot continuous rolling is 20-40%, the pass deformation of the hot continuous rolling is less than or equal to 15%, and the finish rolling temperature of the hot continuous rolling is more than or equal to 750 ℃.
The finishing temperature of the hot continuous rolling is more than or equal to 750 ℃, the steel strength can be properly reduced, and the problem of insufficient rolling force of a rolling mill is avoided.
The final pass deformation is less than or equal to 15 percent, the rolling force can be reduced, and the shape of the titanium steel composite coil plate can be improved.
According to some embodiments of the invention, the temperature of the coiling is 650 ℃.
The coiling temperature is more than or equal to 650 ℃, the strength of the steel can be reduced, and the steel is convenient to coil.
Drawings
FIG. 1 is a schematic view of a weld batch.
Detailed Description
The following are specific examples of the present invention, and the technical solutions of the present invention will be further described with reference to the examples, but the present invention is not limited to the examples.
Example 1
The embodiment provides a preparation process of a titanium steel composite coil, which comprises the following steps:
s1: carrying out welding batch processing on the titanium plate and the steel plate, vacuumizing and maintaining pressure to obtain a blank;
s2: heating the assembly, and carrying out rough rolling to obtain a rough rolling blank;
s3: and (4) carrying out hot continuous rolling on the rough rolling blank and then coiling to obtain the titanium steel composite coil.
In the preparation process, the thickness of the titanium plate is 0.5-4 mm, and the thickness of the steel plate is 1-9 mm. The thickness of the titanium steel composite roll is 1.5-10.0 mm.
The preparation process further comprises the step of carrying out surface treatment on the steel plate and the titanium plate before the step S1, specifically, carrying out grinding on the steel plate, and carrying out acid washing after grinding on the titanium plate, so that the surface of the joint surface can be ensured to be clean, and the thickness ratio of the steel plate to the titanium plate is consistent with the required ratio of a finished product coil. And after the step S3, performing edge cutting, rewinding and peeling, performing heat treatment on the titanium steel composite coil, and performing surface continuous grinding treatment on the titanium surface and the steel surface.
Suitable designations include Q235, Q345, TA1, TA2, TA8, and TA 9.
The welding batch has a structure as shown in fig. 1, and comprises a first steel plate 110, a second steel plate 120, a first titanium plate 210, a second titanium plate 220, a first steel edge strip 310, a second steel edge strip 320, and a release agent brushed between the first titanium plate 210 and the second titanium plate 220. The quality of the weld seam of a weld batch is critical and requires long-time pressure holding without leakage.
The preparation method of the separant comprises the following steps: magnesium oxide, silicate and polyethylene (mixing ratio is 2: 1: 1), and water is added to dilute and mix evenly. And (4) brushing the separant, namely rolling for 3 times (the thickness of a film layer is 0.3mm), and welding and assembling after drying.
The pressure for pressure maintaining is less than or equal to 10-2Pa. The pressure maintaining time is 20-30 h. The temperature of the heat preservation treatment is 900-940 ℃. The time of heat preservation treatment is 2-8 h. The rough rolling temperature is 850-900 ℃. The number of rough rolling passes is 5-7. The number of rough rolling passes is 5-7, the deformation of the passes is large, and the deformation of the first pass is more than or equal to 20%. The thickness of the rough rolling blank is 30-80 mm. The final rolling temperature of the hot continuous rolling is more than or equal to 750 ℃, the pass deformation of the hot continuous rolling is 20-40%, and the pass deformation of the hot continuous rolling needs to be less than or equal to 15%. The coiling temperature is more than or equal to 650 ℃.
Example 2
The example actually prepares a titanium steel composite roll, and the specification of the titanium steel composite roll is TA 1/Q235R 11/5 multiplied by 1200 XC GB/T8547-2006. The thickness of the adopted titanium plate is 15mm, and the mark is TA 1; the thickness of the steel plate is 75mm, and the mark is Q235.
Firstly, carrying out surface treatment on a steel plate and a titanium plate, specifically, carrying out grinding on the steel plate, carrying out grinding and then pickling on the titanium plate to ensure that the surface of a bonding surface is clean, and then preparing according to the following steps:
s1: carrying out welding batch processing on the titanium plate and the steel plate, vacuumizing and maintaining pressure to obtain a blank;
s2: heating the assembly, and carrying out rough rolling to obtain a rough rolling blank;
s3: and (4) carrying out hot continuous rolling on the rough rolling blank and then coiling to obtain the titanium steel composite coil.
After step S3, the titanium steel composite coil is subjected to processes such as trimming, rewinding and peeling, heat treatment, surface treatment, and the like.
In the preparation process, the pressure for maintaining the pressure is less than or equal to 10-2Pa. The dwell time was 25 h. The temperature of the heating treatment is 910-930 ℃. The heat preservation time of the heat treatment is 4 h. The rough rolling temperature is 870-890 ℃. The number of passes of rough rolling is 5. The number of rough rolling passes is 5, the deformation of the passes is large, and the deformation of the first pass is more than or equal to 20%. The thickness of the roughing blank was 60 mm. The final rolling temperature of the hot continuous rolling is more than or equal to 750 ℃, the pass deformation is 20-40%, and the final pass deformation is less than or equal to 15%. The coiling temperature is more than or equal to 650 ℃.
Example 3
The example actually prepares a titanium steel composite roll, and the specification of the titanium steel composite roll is TA 2/Q345R 12/7 multiplied by 1500 multiplied by C GB/T8547-2006. The thickness of the adopted titanium plate is 20mm, and the mark is TA 2; the thickness of the steel plate is 70mm, and the mark is Q345.
Firstly, carrying out surface treatment on a steel plate and a titanium plate, specifically, carrying out grinding on the steel plate, carrying out grinding and then pickling on the titanium plate to ensure that the surface of a bonding surface is clean, and then preparing according to the following steps:
s1: carrying out welding batch processing on the titanium plate and the steel plate, vacuumizing and maintaining pressure to obtain a blank;
s2: heating the assembly, and carrying out rough rolling to obtain a rough rolling blank;
s3: and (4) carrying out hot continuous rolling on the rough rolling blank and then coiling to obtain the titanium steel composite coil.
After step S3, the titanium steel composite coil is subjected to processes such as trimming, rewinding and peeling, heat treatment, surface treatment, and the like.
In the preparation process, the pressure for maintaining the pressure is less than or equal to 10-2Pa. The dwell time was 25 h. The temperature of the heating treatment is 920-940 ℃. The heat preservation time of the heat treatment is 4 h. The rough rolling temperature is 880-900 ℃. The number of passes of rough rolling is 7. The number of rough rolling passes is 7, the deformation of the passes is large, and the deformation of the first pass is more than or equal to 20%. The thickness of the roughing blank was 45 mm. The final rolling temperature of the hot continuous rolling is more than or equal to 750 ℃, the pass deformation is 20-40%, and the final pass is changedThe shape amount is 10%. The coiling temperature is more than or equal to 650 ℃.
Example of detection
In this example, the titanium steel composite coils prepared in example 2 and example 3 were examined, and the bonding rate, the dimensional accuracy of the whole coil, and the surface quality of the titanium steel composite coil were measured, and the results are shown in table 1.
TABLE 1
| Titanium steel composite coil | Bonding rate | Shear strength MPa | Dimensional accuracy of whole roll | Surface quality | Bending test |
| Example 2 | 100％ | 232 | ±0.3mm | Good taste | Qualified |
| Example 3 | 100％ | 214 | ±0.5mm | Good taste | Qualified |
Claims (10)
1. The preparation process of the titanium steel composite coil is characterized by comprising the following steps:
s1: carrying out welding batch processing on the titanium plate and the steel plate, vacuumizing and maintaining pressure to obtain a blank;
s2: heating the assembly, and carrying out rough rolling to obtain a rough rolling blank;
s3: and (4) carrying out hot continuous rolling on the rough rolling blank and then coiling to obtain the titanium steel composite coil.
2. The process for preparing titanium-steel composite coil according to claim 1, wherein the pressure for pressure holding is 10 or less- 2Pa。
3. The process for preparing the titanium steel composite coil according to claim 2, wherein the pressure maintaining time is 20-30 h.
4. The preparation process of the titanium steel composite coil according to claim 1, wherein the heating treatment temperature is 900-940 ℃, and the heating treatment time is 2-8 hours.
5. The preparation process of the titanium steel composite coil according to claim 1, wherein the rough rolling temperature is 850-900 ℃.
6. The process for preparing the titanium steel composite coil according to claim 1, wherein the first-pass deformation of the rough rolling is not less than 20%.
7. The process for preparing the titanium steel composite coil according to claim 6, wherein the number of passes of rough rolling is 5-7.
8. The process for preparing the titanium steel composite coil according to claim 1, wherein the thickness of the rough rolled blank is 30-80 mm.
9. The preparation process of the titanium steel composite coil according to claim 1, wherein the pass deformation of the hot continuous rolling is 20-40%, and the pass deformation of the final rolling of the hot continuous rolling is less than or equal to 15%.
10. The process for preparing the titanium steel composite coil according to claim 9, wherein the finishing temperature of the hot continuous rolling is not less than 750 ℃.
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Application publication date: 20200407 |