CN110665969A - Preparation method of high-performance titanium/steel bimetal composite board - Google Patents
Preparation method of high-performance titanium/steel bimetal composite board Download PDFInfo
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- CN110665969A CN110665969A CN201910954923.3A CN201910954923A CN110665969A CN 110665969 A CN110665969 A CN 110665969A CN 201910954923 A CN201910954923 A CN 201910954923A CN 110665969 A CN110665969 A CN 110665969A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- 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
- B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
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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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Abstract
The invention discloses a preparation method of a high-performance titanium/steel bimetal composite plate, and belongs to the technical field of bimetal composite plate preparation. Annealing the pure titanium plate blank and the low-carbon steel plate blank to reduce the hardness of the blank and enable the hardness of the blank to be close to that of the blank, cleaning and degreasing the surface of the blank to be compounded, polishing the surface of the blank to be compounded, enabling the direction of polishing stripes to be perpendicular to the rolling direction, stacking the pure titanium plate blank and the low-carbon steel plate blank to obtain a combined blank, riveting the head of the combined blank, performing single-pass cold rolling pre-compounding on the combined blank, heating, and finally performing single-pass hot rolling final compounding to obtain the high-performance titanium/steel bimetal composite plate. The method has the advantages of low equipment requirement, short process flow, high production efficiency and low production cost, the interface bonding strength of the prepared titanium/steel bimetal composite plate is more than 230MPa, the area bonding rate is 100 percent, and the method is particularly suitable for preparing the high-performance thin-thickness titanium/steel bimetal composite plate or the thin-titanium-layer titanium/steel bimetal composite plate.
Description
Technical Field
The invention belongs to the technical field of bimetal composite board preparation, and particularly provides a preparation method of a high-performance titanium/steel bimetal composite board.
Background
The titanium/steel bimetal composite board formed by laminating the titanium plate and the steel plate not only has the excellent corrosion resistance of titanium, but also has the advantages of high strength, low cost and the like of steel, and has wide application in the fields of petroleum, chemical engineering, shipbuilding and the like.
At present, the method for preparing the titanium/steel bimetal composite plate mainly comprises an explosion cladding method and a hot rolling cladding method. The explosive cladding method has been gradually replaced by the hot rolling cladding method because of the problems of large energy consumption, serious environmental pollution, potential safety hazard and the like. The traditional hot rolling compounding method is that the surfaces to be compounded of a titanium plate and a steel plate are mechanically treated and then assembled, then the periphery of the interface to be compounded is welded and vacuumized, then the blank is heated to a certain temperature and then is subjected to heat preservation, and finally multi-pass hot rolling is carried out. Although the traditional hot rolling composite method solves the problems of environmental pollution, low yield, incapability of producing large-size heavy-coil or thin-thickness titanium/steel bimetal composite plates and the like of the explosive composite method, the following main problems still exist:
(1) the interface to be compounded of the titanium plate and the steel plate is easy to react with oxygen in the air at high temperature to generate oxides, and the compounding quality is influenced, so the traditional hot rolling compounding method needs to weld and vacuumize the periphery of the interface to be compounded of the blank or weld the periphery of the interface to be compounded of the blank in a vacuum environment to avoid the oxidation of the interface during heating or hot rolling, and has high requirements on equipment, complex process and low production efficiency.
(2) The traditional hot rolling composite method needs multi-pass hot rolling, the total rolling reduction is more than 90%, the initial rolling temperature is more than 900 ℃ generally, the final rolling temperature cannot be lower than 750 ℃, when the temperature reaches 882 ℃, titanium is subjected to alpha → beta phase transition, TiC and Ti-Fe equal brittle intermetallic compounds are easily generated at the interface of the titanium and the steel when the temperature exceeds 882 ℃, particularly the interface bonding strength of the titanium/steel bimetal composite plate is seriously influenced by the generation of a Ti-Fe phase, so that a transition layer of copper, nickel or niobium and the like is sometimes added between the titanium and the steel to prevent the titanium and the steel from directly contacting, and the Ti-Fe phase is prevented from being generated at the interface by the traditional hot rolling composite method; the addition of the transition layer improves the raw material cost and reduces the production efficiency, and the transition layer can react with titanium and steel to generate a new intermetallic compound, so that the interface bonding strength is unstable.
Therefore, aiming at the problems in the traditional titanium/steel bimetal composite board preparation, the method for preparing the titanium/steel bimetal composite board with excellent performance at low cost and high efficiency is developed, and the method has very important significance.
Disclosure of Invention
The invention aims to provide a preparation method of a high-performance titanium/steel bimetal composite plate, which can be used for preparing the titanium/steel bimetal composite plate with high interface bonding strength at low cost and high efficiency by directly adopting a single pure titanium plate blank and a single low-carbon steel plate blank as raw materials without welding the periphery of an interface to be compounded of a combined blank, vacuumizing and adding a transition layer.
According to a first aspect of the invention, a preparation method of a high-performance titanium/steel bimetal composite plate is provided, which comprises the following steps:
step 1: and annealing the pure titanium plate blank and the low-carbon steel plate blank to ensure that the hardness of the pure titanium plate blank is less than 180HV, the hardness of the low-carbon steel plate blank is less than 160HV, and the hardness difference between the pure titanium plate blank and the low-carbon steel plate blank is less than 20 HV. The critical reduction of the cold rolling of the titanium/steel blank can be obviously reduced by adjusting the hardness of the plate blank through annealing treatment;
step 2: adopting a louver blade, a grinding wheel or a grinding wheel to polish the surfaces to be compounded of the pure titanium plate blank and the low-carbon steel plate blank after surface cleaning and degreasing, removing pollutants and an oxide layer on the surfaces to be compounded to obtain a clean and rough surface to be compounded, wherein the direction of polishing stripes formed by polishing is vertical to the rolling direction;
and step 3: placing the pure titanium plate blank and the low-carbon steel plate blank after the surface treatment to be compounded in an up-and-down stacking mode, riveting and fixing two sides of the head of the pure titanium plate blank and the two sides of the head of the low-carbon steel plate blank by using an aluminum rivet to obtain a combined blank, wherein the length and the width of the pure titanium plate blank are equal to those of the low-carbon steel plate blank, and the thickness matching of the pure titanium plate blank and the low-carbon steel plate blank is determined by the layer thickness ratio of the titanium/steel bimetal composite plate to be prepared;
and 4, step 4: carrying out single-pass cold rolling pre-compounding on the combined blank to obtain a titanium/steel bimetal cold rolling pre-compounded plate;
and 5: heating and insulating the titanium/steel bimetal cold-rolled pre-clad plate;
step 6: and carrying out single-pass hot rolling final compounding on the heated titanium/steel bimetal cold-rolled pre-composite plate, and then air-cooling to room temperature to obtain the titanium/steel bimetal composite plate.
Furthermore, in the step 4, the cold rolling speed is less than 0.1m/s, and the cold rolling reduction is 35-60%. The rolling speed is less than 0.1m/s, the critical reduction of the titanium/steel blank cold rolling pre-compounding can be obviously reduced, and the cold rolling reduction is controlled to be 35-60% according to the initial thickness of the blank, so that the titanium/steel blank is ensured to realize the cold rolling pre-compounding and the interface has certain bonding strength.
Further, in the step 5, the heating temperature is 840-880 ℃, and the heat preservation time is 10-40 min. The heating temperature is controlled to be 840-880 ℃, so that beta phase transformation of titanium can be avoided, Ti-Fe phase generated on an interface is prevented from damaging the interface bonding quality, the interface of the titanium/steel bimetal pre-composite plate can be softened, interface atom diffusion is promoted, and the interface bonding strength is improved. The purpose of heat preservation for 10-40 min is to ensure that the temperature of the titanium/steel bimetal cold rolling pre-composite plate is uniform and prevent a large amount of TiC generated on an interface from damaging the interface bonding quality.
Furthermore, in the step 6, the hot rolling speed is more than 0.2m/s, and the hot rolling reduction is 20-60%. Considering that the thickness of the titanium/steel bimetal cold rolling pre-composite plate is small, the temperature drop is fast during hot rolling, the hot rolling speed is required to be more than 0.2m/s in order to avoid the influence of the temperature drop on the interface bonding quality, and meanwhile, the hot rolling reduction is improved as much as possible, the interface atom diffusion is promoted, and the interface bonding strength of the titanium/steel bimetal composite plate is improved.
Further, the low-carbon steel is Q235, Q275 or 20#, and the thickness is 1-10 mm; the pure titanium is TA1, TA2, TA3 or TA10, and the thickness of the pure titanium is 0.2-3 mm. By reasonably matching the thicknesses of the titanium composite layer and the steel base layer, the corrosion resistance and the mechanical property of the titanium/steel bimetal composite plate can be ensured, and the cost is reduced.
Furthermore, the microscopic appearance of the interface of the titanium/steel bimetal cold rolling pre-composite plate is a mutual embedded sawtooth structure, the height of the sawtooth is 1-5 mu m, mechanical meshing of the titanium/steel interface is facilitated, the contact area of the interface is increased, and atomic diffusion of the titanium/steel interface during hot rolling is facilitated.
Further, the thickness of the titanium/steel bimetal composite plate is 0.3-5 mm, the ratio of the thickness of the pure titanium to the thickness of the titanium/steel bimetal composite plate is 1% -50%, and the ratio of the thickness of the low-carbon steel to the thickness of the titanium/steel bimetal composite plate is 50% -99%. The thickness is reduced while the comprehensive performance of the titanium/steel bimetal composite board is ensured, and the application field of the titanium/steel bimetal composite board is expanded.
Furthermore, the composite interface of the titanium/steel bimetal composite plate has no Ti-Fe phase and only a small amount of TiC, the thickness of the atomic diffusion layer of the composite interface is 3-5 mu m, and the interface realizes good metallurgical bonding. The interface bonding strength of the titanium/steel bimetal composite plate is more than 230MPa, the area bonding rate is 100 percent, and the requirements of class 0 titanium/steel composite plates in the national standard GB/T8547-2006 titanium-steel composite plate are met.
Further, straightening, trimming and surface grinding are carried out on the titanium/steel bimetal composite plate.
According to a second aspect of the invention, a high-performance titanium/steel bimetal composite plate is provided, which is characterized in that the high-performance titanium/steel bimetal composite plate is obtained by adopting the preparation method according to any one of the above aspects.
Detecting the interface bonding strength of the TA2 titanium/Q235 steel bimetal composite plate according to the national standard GB/T6396-2008 composite steel plate mechanics and process performance test method; according to the national standard GB/T8547-.
The invention has the beneficial effects that:
(1) the invention firstly reduces the hardness and the deformation resistance of the blank through annealing treatment, and reduces the critical reduction of the titanium/steel blank cold rolling pre-compounding. And then, the titanium/steel interface is tightly attached through single-pass cold rolling pre-compounding, so that air is isolated, and the interface is prevented from being oxidized in the subsequent single-pass hot rolling final compounding process. Because the interface bonding strength of the titanium/steel bimetal pre-composite plate prepared by single-pass cold rolling pre-compounding is not high, the interface bonding strength of the titanium/steel bimetal composite plate can be obviously improved by single-pass hot rolling final compounding. The titanium/steel bimetal composite plate is prepared simply and efficiently by skillfully combining annealing treatment, single-pass cold rolling pre-compounding and single-pass hot rolling final compounding.
(2) The method adopts a cold rolling mode to pre-compound the pure titanium plate blank and the low-carbon steel plate blank, discharges air in an interface to be compounded of the pure titanium and the low-carbon steel, avoids the oxidation of the interface between the pure titanium and the low-carbon steel in the subsequent heating and hot rolling processes, and has the advantages of simple and convenient pretreatment, low equipment requirement, high production efficiency and cleaner interface.
(3) The composite interface of the titanium/steel bimetal cold-rolled pre-composite plate prepared by cold rolling is of a zigzag structure, the contact area of the composite interface of pure titanium and low-carbon steel is increased, the atomic diffusion between the composite interfaces during subsequent heating and hot rolling is facilitated, the interaction between the composite interfaces during hot rolling is improved, the generation of a Ti-Fe phase at the composite interface of pure titanium and low-carbon steel is avoided by controlling the heating temperature and the heat preservation time before hot rolling, and the high-performance titanium/steel bimetal composite plate with the interface bonding strength larger than 230MPa and the area bonding rate of 100% is prepared only by adopting a rolling mode.
(4) When the titanium/steel bimetal composite board is prepared, a transition layer does not need to be added between pure titanium and low-carbon steel, multi-pass hot rolling is not needed, subsequent diffusion heat treatment is not needed, the production process is simple, the production flow is short, energy is saved, the utilization rate of raw materials is high, and the production cost is low.
(5) The thickness ratio of the titanium/steel bimetal composite board and the thickness uniformity of the pure titanium layer prepared by the invention are easy to control, and the quality of the titanium/steel bimetal composite board is high.
(6) The method can obtain the titanium/steel bimetal composite board which is difficult to prepare by the traditional method, and is particularly suitable for preparing the high-performance thin-thickness titanium/steel bimetal composite board or the thin-titanium layer titanium/steel bimetal composite board.
Drawings
Fig. 1 is a flow chart of a preparation method of a high-performance titanium/steel bimetal composite plate according to the invention.
FIG. 2 is a topographic map of a zigzag structure of TA2 titanium/Q235 steel cold-rolled pre-composite plate with mutually embedded interfaces.
FIG. 3 is a structural morphology diagram of the TA2 titanium/Q235 steel hot rolled composite plate interface.
Detailed Description
The present invention is described in detail with reference to the following embodiments, it should be noted that the embodiments are only used for further illustration of the present invention, and should not be construed as limiting the scope of the present invention, and those skilled in the art can make modifications and adaptations in the light of the above disclosure.
As shown in fig. 1, the method for preparing a high-performance titanium/steel bimetal composite plate according to the present invention comprises the following steps:
step 101: annealing the pure titanium plate blank and the low-carbon steel plate blank to ensure that the hardness of the pure titanium plate blank is less than 180HV, the hardness of the low-carbon steel plate blank is less than 160HV, and the hardness difference between the pure titanium plate blank and the low-carbon steel plate blank is less than 20 HV;
step 102: adopting a louver blade, a grinding wheel or a grinding wheel to polish the surfaces to be compounded of the pure titanium plate blank and the low-carbon steel plate blank after surface cleaning and degreasing, removing pollutants and an oxide layer on the surfaces to be compounded to obtain a clean and rough surface to be compounded, wherein the direction of polishing stripes formed by polishing is vertical to the rolling direction;
step 103: placing the pure titanium plate blank and the low-carbon steel plate blank after the surface treatment to be compounded in an up-and-down stacking mode, riveting and fixing two sides of the head of the pure titanium plate blank and the two sides of the head of the low-carbon steel plate blank by using an aluminum rivet to obtain a combined blank, wherein the length and the width of the pure titanium plate blank are equal to those of the low-carbon steel plate blank, and the thickness matching of the pure titanium plate blank and the low-carbon steel plate blank is determined by the layer thickness ratio of the titanium/steel bimetal composite plate to be prepared;
step 104: carrying out single-pass cold rolling pre-compounding on the combined blank, wherein the cold rolling speed is less than 0.1m/s, and the cold rolling reduction is 35-60%, so as to obtain a titanium/steel bimetal cold rolling pre-compounded plate;
step 105: heating the titanium/steel bimetal cold rolling pre-clad plate at 840-880 ℃ for 10-40 min;
step 106: and carrying out single-pass hot rolling final compounding on the heated titanium/steel bimetal cold rolling pre-composite plate, wherein the hot rolling speed is more than 0.2m/s, the hot rolling reduction is 20-60%, and then air cooling to room temperature to obtain the titanium/steel bimetal composite plate.
The low-carbon steel is Q235, Q275 or 20#, and the thickness is 1-10 mm; the pure titanium is TA1, TA2, TA3 or TA10, and the thickness is 0.2-3 mm. The interface micro-morphology of the titanium/steel bimetal cold-rolled pre-composite plate is a mutual embedded sawtooth-shaped structure (shown in figure 2), and the height of sawteeth is 1-5 mu m.
The thickness of the titanium/steel bimetal composite plate is 0.3-5 mm, the layer thickness ratio of pure titanium (the ratio of the thickness of the pure titanium to the thickness of the titanium/steel bimetal composite plate) is 1% -50%, and the layer thickness ratio of low-carbon steel (the ratio of the thickness of the low-carbon steel to the thickness of the titanium/steel bimetal composite plate) is 50% -99%.
The composite interface of the titanium/steel bimetal composite plate has no Ti-Fe phase and only a small amount of TiC, the thickness of the atomic diffusion layer of the composite interface is 3-5 mu m, the interface bonding strength of the titanium/steel bimetal composite plate is more than 230MPa, and the area bonding rate is 100% (as shown in figure 3). And (4) straightening, trimming and surface grinding the titanium/steel bimetal composite plate.
Example 1
TA2 titanium/Q235 steel bimetallic composite plates were prepared.
Annealing a TA2 pure titanium plate blank with the thickness of 1mm and a Q235 low-carbon steel plate blank with the thickness of 4.5mm, wherein the annealing schedule of the TA2 pure titanium plate blank is furnace cooling after the temperature is kept at 750 ℃ for 0.5h, the hardness after annealing is 148HV, the annealing schedule of the Q235 low-carbon steel plate blank is furnace cooling after the temperature is kept at 870 ℃ for 0.5h, and the hardness after annealing is 136 HV; mechanically polishing the surfaces to be compounded of the annealed TA2 pure titanium plate blank and the Q235 low-carbon steel plate blank with the surfaces cleaned and degreased by adopting a louver blade, removing pollutants and an oxidation layer on the surfaces to be compounded to obtain a clean and rough surface to be compounded, wherein the direction of polishing stripes formed by polishing treatment is vertical to the rolling direction; placing the TA2 pure titanium plate blank and the Q235 low-carbon steel plate blank which are subjected to composite surface treatment in an up-and-down laminating mode, riveting and fixing two sides of the head of the TA2 pure titanium plate blank and the Q235 low-carbon steel plate blank by using an aluminum rivet to obtain a combined blank, wherein the lengths and the widths of the TA2 pure titanium plate blank and the Q235 low-carbon steel plate blank are equal; carrying out single-pass cold rolling pre-compounding on the combined blank, wherein the cold rolling speed is 0.04m/s, and the cold rolling reduction is 49%, so as to obtain the TA2 titanium/Q235 steel bimetal cold rolling pre-compounded plate (shown in figure 2); heating the TA2 titanium/Q235 steel bimetal cold-rolled pre-clad plate at 850 ℃ for 15 min; and (3) carrying out single-pass hot rolling final compounding on the heated TA2 titanium/Q235 steel bimetal cold rolling pre-composite plate, wherein the hot rolling speed is 0.5m/s, the hot rolling reduction is 30%, and then air-cooling to room temperature to obtain the TA2 titanium/Q235 steel bimetal composite plate with the pure titanium layer-thickness ratio of 18%. The interface bonding strength of the TA2 titanium/Q235 steel bimetal composite plate is measured to be 234MPa according to the national standard GB/T6396-2008 'test method for mechanical and technological properties of composite steel plate'; according to the national standard GB/T8547-.
Example 2
TA1 titanium/Q235 steel bimetallic composite plates were prepared.
Annealing a TA1 pure titanium plate blank with the thickness of 2mm and a Q235 low-carbon steel plate blank with the thickness of 4mm, wherein the annealing schedule of the TA1 pure titanium plate blank is furnace cooling after the temperature is kept at 750 ℃ for 0.5h, the hardness after annealing is 140HV, the annealing schedule of the Q235 low-carbon steel plate blank is furnace cooling after the temperature is kept at 920 ℃ for 0.5h, and the hardness after annealing is 132 HV; mechanically polishing the surfaces to be compounded of the annealed TA1 pure titanium plate blank and the Q235 low-carbon steel plate blank with the surfaces cleaned and degreased by using a grinding wheel, removing pollutants and an oxide layer on the surfaces to be compounded to obtain a clean and rough surface to be compounded, wherein the direction of polishing stripes formed by polishing is vertical to the rolling direction; placing the TA1 pure titanium plate blank and the Q235 low-carbon steel plate blank which are subjected to composite surface treatment in an up-and-down laminating mode, riveting and fixing two sides of the head of the TA1 pure titanium plate blank and the Q235 low-carbon steel plate blank by using an aluminum rivet to obtain a combined blank, wherein the lengths and the widths of the TA1 pure titanium plate blank and the Q235 low-carbon steel plate blank are equal; carrying out single-pass cold rolling pre-compounding on the combined blank, wherein the cold rolling speed is 0.04m/s, and the cold rolling reduction is 51%, so as to obtain a TA1 titanium/Q235 steel bimetal cold rolling pre-compounded plate; heating the TA1 titanium/Q235 steel bimetal cold rolling pre-clad plate at 865 ℃ for 30 min; and (3) carrying out single-pass hot rolling final compounding on the heated TA1 titanium/Q235 steel bimetal cold rolling pre-composite plate, wherein the hot rolling speed is 1.7m/s, the hot rolling reduction is 32%, and then air-cooling to room temperature to obtain the TA1 titanium/Q235 steel bimetal composite plate with the pure titanium layer-thickness ratio of 36%. The interface bonding strength of the TA1 titanium/Q235 steel bimetal composite plate is 232MPa measured according to the test method of mechanical and technological properties of the composite steel plate of the national standard GB/T6396-2008; according to the national standard GB/T8547-.
Example 3
TA1 titanium/Q275 steel bimetallic composite plates were prepared.
Annealing a TA1 pure titanium plate blank with the thickness of 1mm and a Q275 low-carbon steel plate blank with the thickness of 3mm, wherein the annealing schedule of the TA1 pure titanium plate blank is furnace cooling after the temperature is kept at 750 ℃ for 0.5h, the hardness after annealing is 146HV, the annealing schedule of the Q275 low-carbon steel plate blank is furnace cooling after the temperature is kept at 900 ℃ for 0.5h, and the hardness after annealing is 140 HV; mechanically polishing the surfaces to be compounded of the annealed TA1 pure titanium plate blank and the Q275 low-carbon steel plate blank with the surfaces cleaned and degreased by using a grinding wheel, removing pollutants and an oxide layer on the surfaces to be compounded to obtain a clean and rough surface to be compounded, wherein the direction of polishing stripes formed by polishing is vertical to the rolling direction; placing the TA1 pure titanium plate blank and the Q275 low-carbon steel plate blank which are subjected to composite surface treatment in an up-and-down laminating mode, riveting and fixing two sides of the head of the TA1 pure titanium plate blank and the head of the Q275 low-carbon steel plate blank by using an aluminum rivet to obtain a combined blank, wherein the lengths and the widths of the TA1 pure titanium plate blank and the Q275 low-carbon steel plate blank are equal; carrying out single-pass cold rolling pre-compounding on the combined blank, wherein the cold rolling speed is 0.04m/s, and the cold rolling reduction is 49%, so as to obtain a TA1 titanium/Q275 steel bimetal cold rolling pre-compounded plate; heating the TA1 titanium/Q275 steel bimetal cold-rolled pre-clad plate at 870 ℃ for 25 min; and (3) carrying out single-pass hot rolling final compounding on the heated TA1 titanium/Q275 steel bimetal cold-rolled pre-composite plate at the hot rolling speed of 0.5m/s and the hot rolling reduction of 45%, and then air-cooling to room temperature to obtain the TA1 titanium/Q275 steel bimetal composite plate with the pure titanium layer-thickness ratio of 28%. The interface bonding strength of the TA1 titanium/Q275 steel bimetal composite plate is measured to be 245MPa according to the national standard GB/T6396-2008 test method for mechanical and technological properties of composite steel plate; according to the national standard GB/T8547-.
According to the technical scheme of the invention, the periphery of the interface to be compounded of the combined blank does not need to be welded and vacuumized, a transition layer does not need to be added, the equipment requirement is low, the process flow is short, the production efficiency is high, the production cost is low, the interface bonding strength of the prepared titanium/steel bimetal composite plate is more than 230MPa, the area bonding rate is 100%, and the method is particularly suitable for preparing the high-performance thin-thickness titanium/steel bimetal composite plate or the thin titanium layer titanium/steel bimetal composite plate.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The preparation method of the high-performance titanium/steel bimetal composite plate is characterized by comprising the following steps of:
step 1: annealing the pure titanium plate blank and the low-carbon steel plate blank to ensure that the hardness of the pure titanium plate blank is less than 180HV, the hardness of the low-carbon steel plate blank is less than 160HV, and the hardness difference between the pure titanium plate blank and the low-carbon steel plate blank is less than 20 HV;
step 2: adopting a louver blade, a grinding wheel or a grinding wheel to polish the surfaces to be compounded of the pure titanium plate blank and the low-carbon steel plate blank after surface cleaning and degreasing, removing pollutants and an oxide layer on the surfaces to be compounded to obtain a clean and rough surface to be compounded, wherein the direction of polishing stripes formed by polishing is vertical to the rolling direction;
and step 3: placing the pure titanium plate blank and the low-carbon steel plate blank after the surface treatment to be compounded in an up-and-down stacking mode, riveting and fixing two sides of the head of the pure titanium plate blank and the two sides of the head of the low-carbon steel plate blank by using an aluminum rivet to obtain a combined blank, wherein the length and the width of the pure titanium plate blank are equal to those of the low-carbon steel plate blank, and the thickness matching of the pure titanium plate blank and the low-carbon steel plate blank is determined by the layer thickness ratio of the titanium/steel bimetal composite plate to be prepared;
and 4, step 4: carrying out single-pass cold rolling pre-compounding on the combined blank to obtain a titanium/steel bimetal cold rolling pre-compounded plate;
and 5: heating and insulating the titanium/steel bimetal cold-rolled pre-clad plate;
step 6: and carrying out single-pass hot rolling final compounding on the heated titanium/steel bimetal cold-rolled pre-composite plate, and then air-cooling to room temperature to obtain the titanium/steel bimetal composite plate.
2. The method for preparing a high-performance titanium/steel bimetal composite plate according to claim 1, wherein in the step 4, the cold rolling speed is less than 0.1m/s, and the cold rolling reduction is 35-60%.
3. The preparation method of the high-performance titanium/steel bimetal composite plate according to claim 1, wherein in the step 5, the heating temperature is 840-880 ℃, and the heat preservation time is 10-40 min.
4. The method for preparing a high performance titanium/steel bimetal composite plate according to claim 1, wherein in the step 6, the hot rolling speed is more than 0.2m/s, and the hot rolling reduction is 20-60%.
5. The method for preparing a high-performance titanium/steel bimetal composite plate according to claim 1, wherein the low-carbon steel is Q235, Q275 or 20#, and the thickness is 1-10 mm; the pure titanium is TA1, TA2, TA3 or TA10, and the thickness of the pure titanium is 0.2-3 mm.
6. The method for preparing the high-performance titanium/steel bimetal composite plate according to claim 1, wherein the interface micro-morphology of the titanium/steel bimetal cold-rolled pre-composite plate is a mutual embedded sawtooth-shaped structure, and the sawtooth height is 1-5 μm.
7. The method for preparing a high-performance titanium/steel bimetal composite plate according to claim 1, wherein the thickness of the titanium/steel bimetal composite plate is 0.3-5 mm, the ratio of the thickness of the pure titanium to the thickness of the titanium/steel bimetal composite plate is 1% -50%, and the ratio of the thickness of the low-carbon steel to the thickness of the titanium/steel bimetal composite plate is 50% -99%.
8. The preparation method of the high-performance titanium/steel bimetal composite plate according to claim 1, wherein a composite interface of the titanium/steel bimetal composite plate has no Ti-Fe phase and only a small amount of TiC, the thickness of an atomic diffusion layer of the composite interface is 3-5 μm, the interface bonding strength of the titanium/steel bimetal composite plate is more than 230MPa, and the area bonding rate is 100%.
9. The method according to claim 1, wherein the titanium/steel bimetal composite plate is subjected to straightening, trimming and surface grinding.
10. A high-performance titanium/steel bimetal composite plate, characterized in that it is obtained by the production method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910954923.3A CN110665969B (en) | 2019-10-09 | 2019-10-09 | Preparation method of high-performance titanium/steel bimetal composite board |
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| CN111922076A (en) * | 2020-07-13 | 2020-11-13 | 奥科宁克（昆山）铝业有限公司 | Novel hot rolling composite pass process for aluminum alloy composite ingot |
| CN111940502A (en) * | 2020-07-09 | 2020-11-17 | 武汉科技大学 | Method for improving interface bonding strength of titanium/steel composite material |
| CN112108518A (en) * | 2020-08-03 | 2020-12-22 | 北京科技大学 | Preparation method of metal layered composite material with strong metallurgical bonding interface |
| CN112475584A (en) * | 2020-10-19 | 2021-03-12 | 伊莱特能源装备股份有限公司 | Plate blank surface treatment method for vacuum seal welding |
| CN112705570A (en) * | 2020-12-11 | 2021-04-27 | 沈州 | Method for manufacturing titanium steel composite board and titanium steel liner cup |
| CN113172980A (en) * | 2021-05-12 | 2021-07-27 | 北京科技大学 | Preparation method of stainless steel/carbon steel composite thin plate strip |
| CN113305171A (en) * | 2021-05-12 | 2021-08-27 | 北京科技大学 | Preparation method of titanium/aluminum laminated composite thin plate strip |
| CN114571827A (en) * | 2022-02-28 | 2022-06-03 | 北京科技大学 | Method for preparing titanium/steel laminated composite material by regulating and controlling interface intermetallic compound |
| CN115026129A (en) * | 2022-08-10 | 2022-09-09 | 太原科技大学 | Method for preparing magnesium/titanium layered waveform interface composite material based on rolling method |
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| CN113305171A (en) * | 2021-05-12 | 2021-08-27 | 北京科技大学 | Preparation method of titanium/aluminum laminated composite thin plate strip |
| CN113172980A (en) * | 2021-05-12 | 2021-07-27 | 北京科技大学 | Preparation method of stainless steel/carbon steel composite thin plate strip |
| CN113305171B (en) * | 2021-05-12 | 2022-11-04 | 北京科技大学 | Preparation method of titanium/aluminum laminated composite thin plate strip |
| CN113172980B (en) * | 2021-05-12 | 2023-01-03 | 北京科技大学 | Preparation method of stainless steel/carbon steel composite sheet strip |
| CN114571827A (en) * | 2022-02-28 | 2022-06-03 | 北京科技大学 | Method for preparing titanium/steel laminated composite material by regulating and controlling interface intermetallic compound |
| CN115026129A (en) * | 2022-08-10 | 2022-09-09 | 太原科技大学 | Method for preparing magnesium/titanium layered waveform interface composite material based on rolling method |
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