KR102225672B1 - Manufacturing method of titanium-steel composite plate - Google Patents

Abstract

The present invention relates to a method of manufacturing a titanium-steel composite plate, and bonding performance through manufacturing processes such as blank preparation, surface treatment, release agent brushing, blank symmetric assembly, electron beam sealing strip welding, heating, rolling, deformation correction and plate cutting separation, etc. This strong titanium-steel composite plate is produced. By adding the laminate plate (2) to the composite interface of titanium and steel through the blank assembly process, the titanium and steel in the composite blank cannot be sufficiently contacted, and it blocks the diffusion of elements to each other during the heating process, thereby interfacial carbide and metal interfacially. It controls the mutual formation of brittleness, such as compounds, and then destroys the interfacial oxide film by rolling with a high rolling reduction, forming a newly bonded interface between titanium and steel, sufficiently metallurgical bonding, and furthermore, quickly after rolling. By cooling and controlling the formation of brittleness with each other again, a titanium-steel composite plate having no brittle phase and having strong bonding performance is produced. Compared to the case of adding an interlayer nickel foil or copper foil, the operation is simpler, the production cost is lower, and the bonding performance is stronger.

Description

Manufacturing method of titanium-steel composite plate

The present invention relates to the field of manufacturing a bimetal composite, relates to the production of a composite plate, and more particularly, to a method of manufacturing a titanium-steel composite plate.

Titanium has remarkably excellent corrosion resistance and corrosion resistance exceeds stainless steel in most corrosive environments, so it is widely applied in all fields such as chemical industrial equipment, pressure vessels, heat exchangers, offshore platforms, and aerospace. However, the use of titanium is limited because the high price of titanium increases the material cost of manufacturing equipment. Titanium-steel composite plate has both the excellent corrosion resistance of titanium and the toughness of steel, and significantly reduces the amount of titanium, so it can save cost, and has very high economic value and excellent application prospects.

Currently, the main manufacturing methods of titanium-steel composite plates are the explosive composite method, the explosion-roll composite method, and the vacuum-rolled composite method. However, the explosive composite method is not a sustainable production method with eco-friendliness and environmental protection due to the presence of noise pollution and environmental pollution, relatively largely affected by weather, and low production efficiency. However, the vacuum rolling composite method assembles the blank through vacuum welding and implements a metallurgical competition production method with excellent base material and cladding through heating and rolling, so that the production efficiency is relatively high, pollution is low, consumption is low, and the width is wide. Can produce standard metal composite plates. Therefore, the production of titanium-steel composite plates by the vacuum rolling composite method is a trend of future development.

However, in the case of manufacturing a titanium-steel composite plate by vacuum rolling, since a serious interfacial reaction exists between titanium and steel at high temperature, if the titanium is directly rolled and composited with steel, the composite interface is easily made of Ti-Fe intermetallic compounds, It creates a brittle phase such as intermetallic compounds and TiC, which has a great influence on the bonding performance of the titanium-steel composite plate. In order to control the formation of a brittle phase at the interface, an intermediate layer such as nickel foil or copper foil is usually added between titanium and steel to block the bonding of Ti and C or Ti and Fe, thereby improving the bonding strength of the titanium-steel composite interface. For example, Patent Publication No. 201510249152.X 《High Temperature Manufacturing Method of Titanium-Steel Composite Plate Using Nickel as an Intermediate Layer》 and 201510247275.X 《Manufacturing Method of High Bond Strength Titanium-Steel Composite Plate》 both add nickel foil as an intermediate layer. By rolling, the titanium-steel composite plate was rolled to obtain a titanium-steel composite plate having excellent bonding performance. However, adding an intermediate layer not only makes the production method cumbersome, but also increases the production cost. Therefore, it is necessary to find an appropriate production method to manufacture a titanium-steel composite plate with high bonding performance.

It is an object of the present invention to provide a method for manufacturing a titanium-steel composite plate that solves the problem that severe interfacial reactions that occur when a titanium-steel composite plate is manufactured using a conventional vacuum rolling method affects the bonding performance of the composite plate. To provide.

In order to achieve the above object, the present invention,

(1) surface-treating the composite atmospheric surface blanking the base material and the coating material;

Brushing the non-composite surface of the covering material obtained in step (1) with a release agent and drying (2);

One substrate obtained in step (1) is used as the lower blank, and the periphery of the composite atmosphere surface of the lower blank is fixed by spot welding with a sealing strip, and one groove is enclosed. After fixing a plurality of laminated plates to the composite atmosphere surface of the lower blank in the groove by spot welding, the non-composite surfaces of the two cladding materials obtained in step (2) are overlapped and installed in the groove, and the other one obtained in step (1). The base material is used as the upper blank, and a plurality of laminates are fixed to the composite air surface of the upper blank by spot welding, the upper blank composite air surface covers the two cladding materials downward, and the peripheral outer edges of the upper and lower blanks are attached to the sealing strip. (3) forming a symmetrically combined blank by placing it neatly with the outer edge;

Welding (4) the symmetrically combined blank obtained in step (3) in a vacuum environment;

Heating (5) the symmetrically combined blank obtained in step (4);

A step (6) of hot rolling and cooling the largely combined blank obtained in step (5);

(7) obtaining a titanium-steel composite plate by performing deformation correction, cooling, and plate cutting separation on the symmetrically combined blank obtained in step (6); It provides a method of manufacturing a titanium-steel composite plate comprising a.

In step (1), the substrate is carbon steel or low-alloy high-strength steel, and the cladding material is industrial pure titanium such as TA1 and TA2, and its composition and performance can satisfy the corresponding standard requirements; The surface treatment method is a sanding belt polishing method or a milling machine processing method, and the purpose of the surface treatment is to expose fresh metal on the surface by removing the rusty layer and the oxide layer on the blank surface.

In step (2), the main component of the release agent is MgO powder.

In step (3), the sealing strip has a component corresponding to the base material and a width of 30 to 60 mm, and the height of the sealing strip is the sum of the thickness of the two-layered titanium plate and the thickness of the two-layer laminate; The sealing strip and the welding depth of the upper and lower blanks are all 30 to 60 mm, providing sufficient welding strength to ensure that the composite blank is not ruptured during the rolling process. Preferably, the width of the sealing strip is 35 to 55mm.

In step (3), the component of the laminated plate matches the substrate, the laminated plate is a circular laminate, the diameter of the laminated plate is 10 to 30 mm, and the width is 0.5 to 2 mm; The composite air surface of the lower blank and the composite air surface of the upper blank are arranged in the same manner as each of which is placed between 0.5 and 1.5 m. Preferably, the position of the laminated plate on the composite atmosphere surface of the lower blank corresponds to the position of the laminated plate on the composite atmosphere surface of the upper blank to prevent the titanium plate from being deformed in the process of compressing and combining the blanks, and the composite atmosphere between the titanium plate and the substrate. In addition to ensuring that the surface is isolated, it must be polished after spot welding to remove the oxide layer and welding impurities formed by spot welding to ensure that the composite surface is clean. Preferably, the thickness of the laminate is 1 to 2 mm.

Welding using a vacuum electron beam welding method in step (4), the degree of vacuum when welding is less than ^{5×10 -2 Pa;} The upper blank and the lower blank of the blank combined symmetrically through welding are joined by welding with the sealing strip, and the gap between the sealing strip and the sealing strip is welded to be joined. The welding depth is all 30~60mm.

In step (5), the heating temperature is 850 to 930°C, and the heating time is controlled to 10 to 30 min/cm by the thickness of the symmetrically combined blank. Preferably, the heating temperature is 880 to 910°C.

In step (6), the scale box is removed, the scale is not removed, and the rolling is descaling in the first step by using the traditional rolling and rapid cooling method after rolling; After rolling, high-speed throwing is performed. The final rolling temperature of the hot rolling is ≥700°C, and is rolled with a high rolling reduction, and the total rolling reduction is ≥80%, where the single step maximum rolling reduction is ≥20%. The cooling is rapid cooling or air natural cooling, the rapid cooling is cooling at a rate of 2 to 20°C/s, and a self-tempering temperature is controlled at 400 to 700°C; When the total rolling thickness is >16 mm, rapid cooling is used; When the total thickness of the rolling is ≤ 16mm, use rapid cooling or air natural cooling.

In step (7), the deformation correction and cooling step is performed by performing deformation correction treatment on the composite plate after rolling, cooling on cooling after deformation correction, and going offline when the surface temperature falls below 300°C; For the cutting and separation of the plate, after cutting the head, tail and both sides of the composite plate by adopting a plasma method, the upper and lower two single-sided composite plates are separated, and again, the single-sided composite plate is subjected to deformation correction, surface polishing, and performance test. And after going through the packaging treatment, finally obtain a titanium-steel composite plate product of the required standard. The total thickness of the titanium-steel composite plate product is 6 to 60 mm, where the coating material thickness is 0.5 to 5 mm.

(1) The present invention is a method of adding a laminate plate between titanium and steel in the blank assembly process, so that titanium and steel are completely isolated from the heating process, and it blocks the mutual diffusion of elements during the heating process, and interfacial TiC and TiFe It effectively prevents the formation of brittle phase, etc. By destroying the rolled interface oxide film under high pressure to form a newly bonded interface, and by preventing the formation of brittle phase again by rapid cooling after rolling, bonding performance This strong titanium-steel composite plate is obtained.

(2) The present invention reduces processes such as submerged arc welding, drilling, and vacuum pumping of conventional processes by direct sealing strip and welding in a vacuum environment. Oxidation on the complex atmosphere is reduced and the degree of vacuum is further ensured.

(3) The present invention effectively blocks the formation of a brittle phase at the titanium-steel composite plate interface by adding a laminate between the titanium and steel composite surfaces, so that the operation is simpler compared to the case of adding an interlayer nickel foil or copper foil. The production cost is lower, and the titanium-steel composite plate product with strong bonding performance can be obtained.

1 is an explanatory view in which a laminate is installed on a substrate blank composite atmosphere surface;
2 is a microstructure diagram of a titanium-steel composite plate interface of Example 2.

Example 1

This example selects Q235B steel with a base blank thickness of 66 mm, industrial pure titanium TA2 with a cladding blank thickness of 6 mm, and a TA2/Q235B composite plate with a rolled finished product thickness of 0.5+5.5 mm.

Ⅰ. Surface treatment: Polish the composite air surface of two Q235B base blanks and two TA2 cladding blanks, remove the rusty layer and oxide layer from the blank surface to expose fresh metal on the surface.

Ⅱ. Releasing agent brushing: After brushing the releasing agent on the unpolished surface of the coating material, the releasing agent is dried.

Ⅲ. Blank Symmetrical Combination: Select one of the substrates as the lower blank, and fix the periphery of the composite air surface by spot welding with a sealing strip. The sealing strip is 30mm wide and thick. Is 13 mm, and a circular laminate is installed with a distance of 0.5 m (refer to the arrow distance in Fig. 1) on the composite air surface of the substrate in the groove formed by the sealing strip, and the laminate size is φ 10 × 0.5 mm, and the spot welding method Fixing the laminate to the lower blank composite atmosphere surface; Then, the two non-bonding surfaces of the covering material are overlapped and joined together to be installed in the groove. Again, the other substrate is used as the upper blank, and the laminated plate is spot-welded at the same position for the composite atmosphere surface symmetrical to the lower blank, and then the upper blank composite atmosphere surface faces down to cover the two overlapping cladding materials, and the upper and lower substrates are separated from each other. The outer side of the sealing strip is neatly laid to form a single seal-welded composite blank.

Ⅵ. Electron beam sealing strip welding: The constructed composite blank is transported to a vacuum chamber, and then the vacuum in the vacuum chamber is pumped, and when the vacuum degree of the vacuum chamber ^{reaches 3×10 -2} Pa, the gap between the sealing strip and the substrate is formed using an electron beam. After welding, the welding depth of both the upper and lower blanks is 30 mm, and a composite blank with a total thickness of 145 mm is immediately obtained by this method.

Ⅴ. Heating: The composite blank is transported to the stepping furnace and heated, the heating temperature is 900°C, and the total heating time is 240min.

Ⅵ. Rolling and cooling: Rolling in the traditional way, scale box is removed but scale is not removed, and rolling is decaled in the first stage. The total rolling reduction rate is 91.7%, the maximum reduction rate in the process step is 28%, the final rolling temperature is controlled at around 720°C, the final rolling thickness is 12mm, and natural cooling is performed using air after rolling.

Ⅶ. Deformation correction and plate cutting separation: After deformation correction, it is cooled on a cooling bed, and when the surface temperature drops below 300℃, proceed offline. After cutting the head, tail, and both sides, separate the top and bottom two-sided composite plates, and again, the single-layer composite plate is subjected to deformation correction, and the coating material is surface-polished, and finally, the TA2/Q235B composite with a thickness of 0.5+5.5mm of the finished product. Get a plate product.

As a result of the inspection, the TA2/Q235B composite plate has a cutting strength of around 272 MPa, which has a very strong bonding performance.

Example 2

In this example, a Q345B steel with a base blank thickness of 100 mm, an industrial pure titanium plate TA2 with a cladding blank thickness of 10 mm, and a TA2/Q345B composite plate with a rolled finished product thickness of 2+20 mm are selected.

Ⅰ. Surface treatment: Polishing the composite air surface of two Q345B base blanks and two TA2 cladding blanks, removing the rusty layer and oxide layer from the blank surface to expose fresh metal on the surface.

Ⅱ. Releasing agent brushing: After brushing the releasing agent on the unpolished surface of the coating material, the releasing agent is dried.

Ⅲ. Blank symmetrical combination: One of the substrates is selected and used as the lower blank, and the periphery of the composite air surface is spot-welded and fixed with a sealing strip.The sealing strip is 45mm wide and 23mm thick, and is surrounded by a sealing strip. One circular laminate was installed with a distance of 0.8 meters on the composite atmospheric surface of the substrate in the formed groove, the size of the laminate was φ20×1.5 mm, and the laminate was fixed to the lower blank composite atmospheric surface by a spot welding method; Then, the two non-bonding surfaces of the covering material are overlapped and joined together to be installed in the groove. Again, the other substrate is taken as the upper blank, and the laminated plate is spot-welded at the same position for the composite atmosphere surface symmetrical to the lower blank, and then the upper blank composite atmosphere surface is directed downward to cover the two overlapping cladding materials. The periphery of the upper and lower substrates and the outer side of the sealing strip are evenly arranged to form a single sealing-welded composite blank.

Ⅵ. Electron beam sealing strip welding: The constructed composite blank is transported to a vacuum chamber, and then the vacuum in the vacuum chamber is pumped, and when the vacuum degree of the vacuum chamber ^{reaches 4×10 -2} Pa, the gap between the sealing strip and the substrate is formed using an electron beam. After welding, the welding depth of both the upper and lower blanks is 45mm, and a composite blank with a total thickness of 223mm is immediately obtained by this method.

Ⅴ. Heating: The composite blank is transported to the stepping furnace and heated, the heating temperature is 850℃, and the total heating time is 360min.

Ⅵ. Rolling and cooling: Rolled in the traditional way, scale box is removed but scale is not removed, and rolling is descaled in the first stage. The total rolling reduction ratio is 80.3%, the maximum reduction ratio in the process step is 25%, the final rolling temperature is controlled around 790°C, and the final rolling thickness is 44mm. After rolling, high-speed throwing is performed, and the composite plate rapidly enters the ultra-high-speed cooling stage and cools, the cooling rate is 4°C/s, and the self-tempering temperature is 650°C.

Ⅶ. Deformation correction and plate cutting separation: Then, after deformation correction, it is cooled on a cooling bed, and when the surface temperature drops below 300℃, proceed offline. After cutting the head, tail and both sides, separate the top and bottom two single-layer composite plates, and again, the single-layer composite plate is subjected to deformation correction treatment, and the coating material is polished to the surface. Finally, the finished product thickness of the TA2/Q345B composite plate is 2+20mm. Get the product.

As a result of the inspection, the cutting strength of the TA2/Q345B composite plate of the blank assembly to which the laminated plate was added is around 252 MPa, which has a very strong bonding performance, and as can be seen by contrast with the reference example 1, the same thickness TA2 with the addition of the interlayer nickel foil The cutting strength of the /Q345B composite plate is also only 243 MPa as shown in Table 1. As can be seen from this, the addition of the laminate effectively blocks the reaction of the titanium-steel interface, resulting in very high cutting strength. As can be seen from the interfacial microstructure diagram of the TA2/Q345B titanium-steel composite plate shown in FIG. 2, an unbonded region between titanium and steel was not found, and the composite plate can implement excellent metallurgical bonding.

Example 3

This example selects Q370R steel with a base blank thickness of 275mm, industrial pure titanium TA1 with a covering blank thickness of 25mm, and a TA1/Q370R composite plate with a rolled finished product thickness of 5+55mm.

Ⅰ. Surface treatment: Polish the composite air surface of two Q370R base blanks and two TA1 cladding blanks, remove the rusty layer and oxide layer from the blank surface to expose fresh metal on the surface.

Ⅱ. Releasing agent brushing: After brushing the releasing agent on the unpolished surface of the coating material, the releasing agent is dried.

Ⅲ. Blank symmetrical combination: Select one of the substrates as the lower blank, and fix the periphery of the composite air surface by spot welding with a sealing strip, the sealing strip is 60 mm wide, 54 mm thick, and surrounded by a sealing strip. One circular laminate was installed with a distance of 1.5 meters on the composite atmospheric surface of the substrate in the formed groove, the laminate size was φ30×2.0 mm, and the laminate was fixed to the lower blank composite atmospheric surface by a spot welding method; Then, the two non-bonding surfaces of the covering material are overlapped and joined together to be installed in the groove. Again, the other substrate is taken as the upper blank, and the laminated plate is spot-welded at the same position for the composite atmosphere surface symmetrical to the lower blank, and then the upper blank composite atmosphere surface is directed downward to cover the two overlapping cladding materials. The periphery of the upper and lower substrates and the outer side of the sealing strip are evenly arranged to form a single sealing-welded composite blank.

Ⅵ. Electron beam sealing strip welding: The constructed composite blank is transported to a vacuum chamber, and then the vacuum in the vacuum chamber is pumped, and when the vacuum degree of the vacuum chamber ^{reaches 5×10 -2} Pa, the gap between the sealing strip and the substrate is formed using an electron beam. After welding, the welding depth of both the upper and lower blanks is 60 mm, and a composite blank with a total thickness of 604 mm is immediately obtained by this method.

Ⅴ. Heating: The composite blank is transported to a bogie type furnace and heated, the heating temperature is 880°C, and the total heating time is 820min.

Ⅵ. Rolling and cooling: Rolled in the traditional way, scale box is removed but scale is not removed, and rolling is descaled in the first stage. The total rolling reduction rate is 80.1%, the maximum rolling reduction rate in the process step is 22%, the final rolling thickness is 120mm, and the final rolling temperature is controlled around 810°C. After rolling, high-speed throwing is performed, and the composite plate rapidly enters the ultra-high-speed cooling stage and cools, the cooling rate is 6°C/s and the self-tempering temperature is 630°C.

Ⅶ. Deformation correction and plate cutting separation: Then, after deformation correction, it is cooled on a cooling bed, and when the surface temperature drops below 300℃, proceed offline. After cutting the head, tail, and both sides, separate the upper and lower two single-layer composite plates, and again, the single-layer composite plate is subjected to deformation correction, and the coating material is polished to the surface. Finally, the finished product thickness of the TA1/Q370R composite plate is 5+55mm. Get the product.

As a result of the inspection, the cutting strength of TA1/Q370R composite plate is around 232 MPa, and it still has very high bonding performance among thick composite plates.

Example 4

In this example, X70 steel having a base blank thickness of 98 mm, an industrial pure titanium plate TA1 having a cladding blank thickness of 14 mm, and a composite plate for a TA1/X70 pipeline having a rolled finished product thickness of 2+14 mm are selected.

Ⅰ. Surface treatment: Polishing the composite atmosphere surface of two X70 base blanks and two TA1 cladding blanks. Remove the rusty layer and oxide layer from the blank surface to expose fresh metal to the surface.

Ⅱ. Releasing agent brushing: After brushing the releasing agent on the unpolished surface of the coating material, the releasing agent is dried.

Ⅲ. Blank symmetrical combination: One of the substrates is selected and used as the lower blank, and the periphery of the composite atmosphere is fixed by spot welding with a sealing strip.The sealing strip is 40 mm wide and 30 mm thick, and is surrounded by a sealing strip. One circular laminate was installed with a distance of 0.5 meters on the composite atmospheric surface of the substrate in the formed groove, the size of the laminate was φ10×1.0 mm, and the laminate was fixed to the lower blank composite atmospheric surface by a spot welding method; Then, the two non-bonding surfaces of the covering material are overlapped and joined together to be installed in the groove. Again, the other substrate is used as the upper blank, and the laminated plate is spot-welded in the same position for the composite atmosphere surface symmetrical to the lower blank, and then the upper blank composite atmosphere surface faces down to cover the two overlapping cladding materials, and around the upper and lower substrates. And the outer side of the sealing strip are neatly arranged to form a single sealing-welded composite blank.

Ⅵ. Electron beam sealing strip welding: The constructed composite blank is transported to a vacuum chamber, and then the vacuum in the vacuum chamber is pumped, and when the vacuum degree of the vacuum chamber ^{reaches 3×10 -2} Pa, the gap between the sealing strip and the substrate is formed using an electron beam. After welding, the welding depth of both the upper and lower blanks is 40 mm, and a composite blank with a total thickness of 226 mm is immediately obtained by this method.

Ⅴ. Heating: The composite blank is transported to a walking beam furnace and heated, the heating temperature is 930°C, and the total heating time is 350min.

Ⅵ. Rolling and cooling: Rolled in the traditional way, scale box is removed but scale is not removed, and rolling is descaled in the first stage. The total rolling reduction rate is 85.8%, the maximum rolling reduction rate in the process step is 27%, the final rolling thickness is 32mm, and the final rolling temperature is controlled around 800℃. After rolling, high-speed throwing is performed, and the composite plate rapidly enters the ultra-high-speed cooling stage and cools, the cooling rate is 20°C/s, and the self-tempering temperature is 400°C.

Ⅶ. Deformation correction and plate cutting separation: Then, after deformation correction, it is cooled on a cooling bed, and when the surface temperature drops below 300℃, proceed offline. After cutting the head, tail and both sides, separate the top and bottom two single-layer composite plates, and again, the single-layer composite plate is subjected to deformation correction treatment, and the coating material is surface-polished, and finally, the TA1/X70 pipeline with a finished product thickness of 2+14mm. To obtain a composite plate product for use.

As a result of the inspection, the cutting strength of the TA1/X70 composite plate is around 268 MPa, which has very high competition performance.

Cited example 1

The manufacturing method is the same as in Example 2, and the difference is that when the blanks are symmetrically combined in step III, the technical scheme of adding an interlayer nickel foil without adding a laminate is selected. The specific process is as follows. First, two separate sheets of nickel foil having the same length and width of the covering material and a thickness of 0.5 mm are separately prepared, and the oxidized layer on the upper and lower surfaces of the nickel foil is removed to ensure the cleanliness of the upper and lower surfaces. One of the substrates is selected as a lower blank, and the periphery of the composite atmosphere is fixed by spot welding with a sealing strip, and the sealing strip is 45mm wide and 21mm thick, and the substrate composite atmosphere in the groove formed by surrounding the sealing strip. One sheet of nickel foil is installed on the side; Then, the two non-composite surfaces of the cladding material are overlapped and combined, and installed on the upper surface of the nickel foil in the groove, and another nickel foil is installed on the cladding material that is overlapped by two. Then, use the other substrate as the upper blank, and the composite air surface of the upper blank faces down to cover the nickel foil, and at the same time, the four sides of the upper and lower substrates and the outer edge of the sealing strip are aligned, and one sealing-welding Construct the composite blank you want to do. The electron beam sealing strip welding in step VI can immediately obtain a composite blank with a total thickness of 221 mm. Then, after heating, rolling and cooling, deformation correction and plate cutting separation, an intermediate layer nickel foil is added immediately and a TA2/Q345B composite plate with a thickness of 2+20mm can be obtained. As a result of the detection, as shown in Table 1, the cutting strength was 243 MPa.

Cited example 2

The manufacturing method is the same as in Example 2, the difference is that when the blanks are symmetrically assembled in step III, a method of directly assembling the blanks was used, but no laminate was added, no intermediate layer was added, and the thickness was 2+. It is to manufacture a 20mm TA2/Q345B composite plate. As a result of the inspection, the titanium-steel composite plate TA2/Q345B, which directly assembles the blank, has a cutting strength of only 178 MPa, as shown in Table 1.

As can be seen from the comparison of the data in Table 1, by adding a laminate, a titanium-steel composite plate with high bonding performance can be manufactured, and the cutting strength corresponds to the cutting strength obtained by adding the interlayer nickel foil. It greatly exceeds the cutting strength of the assembled titanium-steel composite plate. However, if the blank is assembled by adding laminates, the process is simple and the cost is low; If an intermediate layer of nickel foil is added, the price of nickel foil is expensive, the operation of cleaning the upper and lower surfaces of the nickel foil is cumbersome, and the cost is very high.

Table 1 Comparison of the cutting strength of the titanium-steel composite plate manufactured by adding a laminated plate, adding an intermediate layer of nickel foil, and assembling a direct blank

In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by equivalent substitution or equivalent conversion are included in the scope of protection required by the present invention.

1: base blank
2: laminated plate

Claims (10)

(1) surface-treating the composite atmospheric surface blanking the base material and the coating material;
Brushing the non-composite surface of the covering material obtained in step (1) with a release agent and drying (2);
One substrate obtained in step (1) is taken as a lower blank, and the periphery of the composite atmosphere surface of the lower blank is fixed by spot welding with a sealing strip, and a single groove is enclosed. After fixing a plurality of laminates on the composite air surface of the lower blank in the groove by spot welding, the non-composite surfaces of the two cladding materials obtained in step (2) are overlapped and installed in the groove, and the other one obtained in step (1) The base material is used as the upper blank, and a plurality of laminates are fixed to the composite air surface of the upper blank by spot welding, the upper blank composite air surface covers the two cladding materials downward, and the peripheral outer edges of the upper and lower blanks are attached to the sealing strip. Forming a symmetrically combined blank by placing it neatly with the outer edge (3);
Welding (4) the symmetrically combined blank obtained in step (3) in a vacuum environment;
Heating (5) the symmetrically combined blank obtained in step (4);
A step (6) of hot rolling and cooling the largely combined blank obtained in step (5);
(7) obtaining a titanium-steel composite plate by performing deformation correction, cooling, and plate cutting separation on the symmetrically combined blank obtained in step (6); . The method of claim 1,
In step (1), the substrate is carbon steel or low-alloy high-strength steel, and the cladding material is industrial pure titanium; The surface treatment method is a method of manufacturing a titanium-steel composite plate, characterized in that a sanding belt polishing method or a milling machine processing method. The method of claim 1,
In step (2), the releasing agent is a method of manufacturing a titanium-steel composite plate, characterized in that the main component is MgO powder. The method of claim 1,
In step (3), the composition of the sealing strip matches the substrate, the width of the sealing strip is 30-60 mm, and the height of the sealing strip is the sum of the thickness of the two-layered laminate and the thickness of the two-layer laminate. A method of manufacturing a titanium-steel composite plate, characterized in that it is. The method of claim 1,
In step (3), the component of the laminated plate is consistent with the substrate, the laminated plate is a circular laminate, the diameter of the laminated plate is 10 to 30 mm, and the width is 0.5 to 2 mm; The method of manufacturing a titanium-steel composite plate, characterized in that the laminated plate arrangement method is the same for the composite atmospheric surface of the lower blank and the composite atmospheric surface of the upper blank, and one laminate is installed at a distance of 0.5 to 1.5 m. The method of claim 1,
In step (4), the upper blank and the lower blank of the symmetrically combined blank are welded using a vacuum electron beam welding method by welding a sealing strip and a gap between the sealing strip, and the welding depth is all 30~60mm. When the vacuum degree is a method of manufacturing a titanium-steel composite plate, characterized in that less than ^{5 × 10 -2 Pa.} The method of claim 1,
In step (5), the heating temperature is 850 to 930°C, and the heating time is controlled to 10 to 30 min/cm by the thickness of the symmetrically combined blank. The method of claim 1,
In step (6), the final rolling temperature of the hot rolling is ≥700°C, the total rolling reduction is ≥80%, and the single step maximum rolling reduction is ≥20%. Way. The method of claim 1,
In step (6), the cooling is rapid cooling or air natural cooling; The rapid cooling is cooled at a rate of 2 to 20° C./s, and the self-tempering temperature is controlled at 400 to 700° C.; When the total rolling thickness is >16 mm, rapid cooling is used; When the total thickness of rolling ≤ 16mm, a method for producing a titanium-steel composite plate, characterized in that using rapid cooling or air natural cooling. The method of claim 1,
In step (7), the total thickness of the titanium-steel composite plate product is 6 to 60 mm, wherein the coating material thickness is 0.5 to 5 mm.

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