A titanium / stainless steel layered composite material with high interfacial bonding strength and its preparation method

Abstract

This invention discloses a high-interfacial-bonding-strength titanium / stainless steel layered composite material and its preparation method, belonging to the technical field of metal layered composite material preparation. The titanium and stainless steel billets to be composited are softened and annealed, and their surfaces are mechanically ground. After being stacked, the composite is rolled at room temperature or below the recrystallization temperature of titanium or stainless steel. Finally, a diffusion heat treatment is performed at 450℃ to 100℃ above the recrystallization temperature of stainless steel to obtain a titanium / stainless steel layered composite material with high interfacial-bonding-strength. The main advantage of this invention is that by synergistically controlling the temperatures during heating, hot rolling, and diffusion heat treatment, it solves the problem of the easy formation of a large number of brittle intermetallic compounds at the interface of existing hot-rolled composite titanium / stainless steel layered composite materials, ensuring the acquisition of a titanium / stainless steel layered composite material with high interfacial-bonding-strength.

Description

Technical Field

[0001] This invention belongs to the field of metal layered composite material preparation technology, specifically relating to a method for preparing a titanium / stainless steel layered composite material with high interfacial bonding strength. Background Technology

[0002] Titanium / stainless steel layered composite materials combine the excellent properties of both titanium and stainless steel, and have been widely used in marine vessels, petrochemicals, aerospace and defense industries.

[0003] Interfacial bonding strength is one of the most important properties of titanium / stainless steel layered composites. Higher interfacial bonding strength leads to greater safety, longer service life, and wider application range. Currently, the main methods for producing titanium / stainless steel layered composites are explosive bonding and hot rolling bonding. Explosive bonding suffers from long production cycles, stringent environmental requirements, significant environmental pollution, safety hazards, inability to achieve continuous production, and limitations in product size specifications, and has been gradually phased out. Hot rolling bonding offers advantages such as low production cost, high production efficiency, ease of continuous production, minimal environmental impact, and flexible product size specifications, making it a widely used method for forming metal layered composites. However, hot rolling bonding of titanium and stainless steel differs significantly from hot rolling bonding of other metals. Under heating conditions, the titanium / stainless steel interface readily and rapidly reacts to generate a large amount of brittle intermetallic compounds, deteriorating the bonding strength of the composite interface. Especially under the thermo-mechanical coupling effect during hot rolling, the rate of formation of brittle intermetallic compounds at the titanium / stainless steel interface accelerates dramatically, making interface microstructure control extremely difficult. Therefore, the traditional method of hot rolling composite preparation of titanium / stainless steel layered composites at recrystallization temperatures much higher than those of stainless steel is prone to generating a large number of brittle intermetallic compounds at the titanium / stainless steel interface, making it difficult to form titanium / stainless steel layered composites with high interfacial bonding strength.

[0004] Given the shortcomings of traditional hot-rolling composite processes where a large amount of brittle intermetallic compounds easily form at the titanium / stainless steel interface, researchers have developed a rolling composite method that uses an intermediate layer metal to avoid direct contact between titanium and stainless steel, thus addressing the problem of brittle intermetallic compound formation at the titanium / stainless steel interface. Existing technologies use low-carbon steel added between titanium and stainless steel to prevent direct contact and reaction during rolling, thereby improving the interfacial bonding strength of the composite plate. However, adding an intermediate layer metal not only increases process complexity and production costs but also severely affects the overall performance of titanium / stainless steel layered composites, limiting their application areas.

[0005] Therefore, it is necessary to develop a new method for preparing titanium / stainless steel layered composite materials, which can achieve direct composite of titanium / stainless steel at low cost and high efficiency, while avoiding the formation of a large number of brittle intermetallic compounds at the titanium / stainless steel interface, and obtaining titanium / stainless steel layered composite materials with high interfacial bonding strength. Summary of the Invention

[0006] The purpose of this invention is to provide a titanium / stainless steel layered composite material with high interfacial bonding strength and its preparation method. By synergistically controlling the temperature during heating, hot rolling and diffusion heat treatment, the process parameter range in which a large number of brittle intermetallic compounds are easily generated at the titanium / stainless steel interface during rolling composite and diffusion heat treatment is avoided. This enables direct, low-cost and efficient rolling composite of titanium and stainless steel while ensuring the acquisition of a titanium / stainless steel layered composite material with high interfacial bonding strength.

[0007] According to a first aspect of the present invention, a method for preparing a titanium / stainless steel layered composite material with high interfacial bonding strength is provided, comprising the following steps:

[0008] Step 1: Soften and anneal the titanium billet and stainless steel billet to be composited separately to obtain the titanium billet and stainless steel billet in a soft state.

[0009] Step 2: Mechanically grind the surfaces of the titanium billet and the stainless steel billet to be laminated, respectively, so that the grinding stripes are perpendicular to the length direction of the titanium billet and the stainless steel billet. Then, the billets are stacked to form a titanium / stainless steel layered billet.

[0010] Step 3: The titanium / stainless steel layered billet is rolled and compounded in 2 to 10 passes at room temperature or below the recrystallization temperature of titanium or below the recrystallization temperature of stainless steel to obtain a titanium / stainless steel layered composite billet.

[0011] Step 4: The titanium / stainless steel layered composite billet is subjected to diffusion heat treatment in an air atmosphere. The diffusion heat treatment temperature is 450℃ to 100℃ above the recrystallization temperature of the stainless steel to obtain a titanium / stainless steel layered composite material with high interfacial bonding strength.

[0012] Furthermore, in step 3, the rolling reduction rate of the first pass is ≥35%; in step 4, the diffusion heat treatment time is 0.01 to 300 min.

[0013] Furthermore, the titanium billet and the stainless steel billet are at least one of wire, bar, tube, plate, strip or profile, and are in single-piece, single-piece or coil form.

[0014] Furthermore, the mechanical polishing is either offline or online, and the polishing method is at least one of belt polishing, grinding wheel polishing, grinding wheel polishing, wire brush polishing, louver polishing, or laser polishing.

[0015] Furthermore, the stacked blanks can be offline stacked blanks or online stacked blanks.

[0016] Furthermore, the titanium / stainless steel layered billet is subjected to offline or online heating, and the heating method is at least one of resistance heating, flame heating, induction heating, pulse heating, radiation heating or laser heating, and the heating atmosphere is at least one of air atmosphere, vacuum, reducing atmosphere or protective atmosphere.

[0017] Furthermore, the heating in the diffusion heat treatment is offline heating or online heating, and the heating method is at least one of resistance heating, flame heating, induction heating, pulse heating, radiation heating or laser heating.

[0018] Furthermore, the heating atmosphere for the diffusion heat treatment is at least one of a vacuum, a reducing atmosphere, or a protective atmosphere.

[0019] Furthermore, the titanium / stainless steel layered composite material has 2 to 10 layers.

[0020] Furthermore, the titanium is pure titanium and its alloys, and the stainless steel is martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, and duplex stainless steel.

[0021] According to a second aspect of the present invention, a high interfacial bonding strength titanium / stainless steel layered composite material is provided, wherein the high interfacial bonding strength titanium / stainless steel layered composite material is prepared by the preparation method according to any one of the above aspects.

[0022] The beneficial effects of this invention are:

[0023] By employing this method, through coordinated control of the temperatures during heating, hot rolling, and diffusion heat treatment, the process parameter range in which a large number of brittle intermetallic compounds are easily generated at the titanium / stainless steel interface during rolling composite and diffusion heat treatment can be avoided. This allows for direct, low-cost, and efficient rolling composite of titanium and stainless steel while ensuring the acquisition of titanium / stainless steel layered composite materials with high interfacial bonding strength. Attached Figure Description

[0024] Figure 1 This is a flowchart illustrating the preparation method of the high interfacial bonding strength titanium / stainless steel layered composite material according to the present invention.

[0025] Figure 2 A cross-sectional photograph of the tensile-shear fracture surface of a titanium / stainless steel layered composite material with high interfacial bonding strength prepared according to the present invention.

[0026] Figure 3 The interfacial microstructure of a titanium / stainless steel layered composite material hot-rolled above the recrystallization temperature of stainless steel is shown. Detailed Implementation

[0027] The present invention will be described in detail below with reference to the embodiments. It should be noted that the following embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Those skilled in the art can make non-essential improvements and adjustments based on the content of the present invention.

[0028] This invention provides a high-interfacial-bonding-strength titanium / stainless steel layered composite material and its preparation method. For example... Figure 1 As shown, the preparation method includes the following steps:

[0029] Step 101: Soften and anneal the titanium billet and stainless steel billet to be composited separately to obtain soft titanium billet and stainless steel billet.

[0030] The titanium billet and stainless steel billet are, for example, at least one of wire, bar, tube, plate, strip or profile, and can be in single piece, single piece or coil form. Here, titanium is, for example, pure titanium and its alloys, and stainless steel is, for example, martensitic stainless steel, ferritic stainless steel, austenitic stainless steel and duplex stainless steel.

[0031] Step 102: Mechanically grind the surfaces of the titanium billet and the stainless steel billet to be laminated, respectively. The grinding stripes are perpendicular to the length of the titanium billet and the stainless steel billet. Then, the billets are stacked to form a titanium / stainless steel layered billet.

[0032] The mechanical grinding can be offline or online, and the grinding method can be at least one of belt grinding, abrasive wheel grinding, grinding wheel grinding, wire brush grinding, louvered grinding, or laser grinding. The laminated preform assembly can be offline or online.

[0033] Step 103: Roll the titanium / stainless steel layered billet in 2 to 10 passes at room temperature or below the recrystallization temperature of titanium or stainless steel. The rolling reduction rate of the first pass is ≥35% to obtain the titanium / stainless steel layered composite billet.

[0034] Offline or online heating is performed on titanium / stainless steel layered billets, with the heating method being at least one of resistance heating, flame heating, induction heating, pulse heating, radiation heating, or laser heating, and the heating atmosphere being at least one of air atmosphere, vacuum, reducing atmosphere, or protective atmosphere.

[0035] Step 104: The titanium / stainless steel layered composite blank is subjected to diffusion heat treatment in an air atmosphere. The diffusion heat treatment temperature is 450℃ to 100℃ above the recrystallization temperature of stainless steel, and the diffusion heat treatment time is 0.01 to 300 min to obtain a titanium / stainless steel layered composite material with high interfacial bonding strength.

[0036] The heating in the diffusion heat treatment is, for example, offline or online heating, and the heating method is at least one of resistance heating, flame heating, induction heating, pulse heating, radiation heating, or laser heating. The heating atmosphere for the diffusion heat treatment is at least one of vacuum, reducing atmosphere, or protective atmosphere. The number of layers in the titanium / stainless steel layered composite material is, for example, 2 to 10 layers.

[0037] The present invention provides a high-interfacial-bonding-strength titanium / stainless steel layered composite material prepared using any of the preparation methods described above. For example... Figure 2 As shown, the interfacial bonding strength of the titanium / stainless steel layered composite material with high interfacial bonding strength prepared according to the present invention exceeds the strength of the component metals.

[0038] In fact, the applicants of this invention have found that the rate at which brittle intermetallic compounds are formed at the titanium / stainless steel interface is mainly affected by the recrystallization temperature of the stainless steel. When the heating temperature is more than 100°C higher than the recrystallization temperature of the stainless steel, the titanium / stainless steel interface will react rapidly to form a large number of brittle intermetallic compounds, which will seriously deteriorate the bonding strength of the composite interface. If the heating time is longer, the problem will be more serious. Under the effect of thermo-mechanical coupling, such as in the hot rolling composite process, the temperature at which the titanium / stainless steel interface reacts rapidly to form a large number of brittle intermetallic compounds will be reduced to the recrystallization temperature of the stainless steel. During heating, atoms in stainless steel rapidly diffuse towards the titanium side, forming a large amount of brittle intermetallic compounds. When the temperature exceeds the recrystallization temperature of stainless steel, the atomic activity in stainless steel increases significantly, especially when the temperature exceeds the recrystallization temperature by more than 100°C. This leads to an excessively rapid and uncontrollable diffusion rate of atoms from stainless steel towards the titanium side to form brittle intermetallic compounds, and the problem worsens with longer heating times. During hot rolling under thermo-mechanical coupling, the rolling force further promotes the diffusion of atoms from stainless steel towards the titanium side, causing the temperature at which the titanium / stainless steel interface rapidly reacts to form a large amount of brittle intermetallic compounds to drop to the recrystallization temperature of stainless steel. However, when rolling composite titanium / stainless steel layered composites below the recrystallization temperature of stainless steel, although the titanium / stainless steel interface is less prone to forming a large amount of brittle intermetallic compounds, the interface is prone to low interfacial bonding strength due to insufficient atomic diffusion. By controlling the temperatures during heating, hot rolling, and diffusion heat treatment, a 2-10 pass rolling composite process is employed to fully break down the hardened and oxide layers at the titanium / stainless steel interface, improving the bonding rate and consistency of the titanium / stainless steel interface. This facilitates precise control of the microstructure of the titanium / stainless steel interface and further enhances the interfacial bonding strength of the titanium / stainless steel layered composite material. Therefore, the applicant of this invention has discovered that by performing a 2-10 pass rolling composite process at room temperature or below the recrystallization temperature of titanium or stainless steel, followed by a short-time diffusion heat treatment at 450°C to 100°C above the recrystallization temperature of stainless steel, a titanium / stainless steel layered composite material with high interfacial bonding strength can be obtained. See the following embodiments and comparative examples for details.

[0039] Example 1:

[0040] Pure titanium / 304 stainless steel composite plates were prepared using single-sheet pure titanium slabs and 304 stainless steel slabs, each with a thickness of 3 mm, as raw materials.

[0041] First, the pure titanium slab and the 304 stainless steel slab were softened and annealed respectively to obtain the soft pure titanium slab and the 304 stainless steel slab.

[0042] Next, an angle grinder equipped with a grinding wheel was used to perform offline mechanical grinding on the surfaces of the pure titanium slab and the 304 stainless steel slab to be laminated, respectively, to remove contaminants and oxide layers from the surfaces to be laminated. The direction of the stripes formed by the mechanical grinding was perpendicular to the length direction of the slab.

[0043] Then, the mechanically ground pure titanium slab and 304 stainless steel slab are stacked together to obtain pure titanium / 304 stainless steel layered billet. The pure titanium / 304 stainless steel layered billet is then fed into a rolling mill for two-pass rolling composite. The rolling reduction rates of the two passes are 45% and 35% respectively, to obtain pure titanium / 304 stainless steel layered composite billet.

[0044] Finally, the pure titanium / 304 stainless steel layered composite billet was sent into a resistance furnace at 750℃ for diffusion heat treatment for 30 minutes to obtain a pure titanium / 304 stainless steel composite plate with an interfacial bonding strength of 290MPa.

[0045] Example 2:

[0046] Titanium / 430 stainless steel composite plates were prepared using pure titanium slabs and 430 stainless steel slabs with thicknesses of 1 mm and 4 mm, respectively, in coil form as raw materials.

[0047] First, the pure titanium slab and the 430 stainless steel slab in coil form are softened and annealed respectively to obtain the soft pure titanium slab and the 430 stainless steel slab.

[0048] The pure titanium slab and the 430 stainless steel slab were uncoiled using an uncoiling equipment, and the surfaces of the pure titanium slab and the 430 stainless steel slab to be laminated were mechanically polished online using an online polishing equipment equipped with louvers to remove contaminants and oxide layers from the surfaces to be laminated. The direction of the stripes formed by mechanical polishing was perpendicular to the length direction of the slab.

[0049] Then, the polished pure titanium slab and 430 stainless steel slab are stacked together using an online billet assembly equipment, and then fed into an online induction heating equipment for online induction heating. The induction heating atmosphere is argon atmosphere, the heating temperature is 500℃, and the heating time is 0.5min. After that, it is fed into a rolling mill for three passes of composite rolling. The rolling reduction rates of each pass are 40%, 30%, and 50% respectively, to obtain pure titanium / 430 stainless steel layered composite billet.

[0050] Then, the pure titanium / 430 stainless steel layered composite billet is fed into an online induction heating device for online induction heating diffusion heat treatment. The diffusion heat treatment temperature is 650℃ and the diffusion heat treatment time is 10min. Finally, at the outlet of the induction heating device, a coiled pure titanium / 430 stainless steel composite plate with an interface bonding strength of 250MPa is obtained.

[0051] Example 3:

[0052] Pure titanium / 316 stainless steel / pure titanium composite plates were prepared using single-sheet pure titanium slabs and 316 stainless steel slabs with thicknesses of 1 mm and 3 mm, respectively, as raw materials.

[0053] First, the pure titanium slab and the 316 stainless steel slab were softened and annealed respectively to obtain the soft pure titanium slab and the 316 stainless steel slab.

[0054] Next, an angle grinder equipped with a grinding wheel was used to perform offline mechanical grinding on the surfaces of the pure titanium slab and the 316 stainless steel slab to be laminated, respectively, to remove contaminants and oxide layers from the surfaces to be laminated. The direction of the stripes formed by the mechanical grinding was perpendicular to the length direction of the slab.

[0055] Then, the mechanically polished pure titanium slab and 316 stainless steel slab are stacked in the order of pure titanium / 316 stainless steel / pure titanium to obtain a pure titanium / 316 stainless steel / pure titanium layered billet. The pure titanium / 316 stainless steel / pure titanium layered billet is then fed into a resistance furnace at a temperature of 400℃ and heated for 10 minutes in an air atmosphere. Subsequently, it is fed into a rolling mill for two-pass rolling composite, with rolling reduction rates of 40% and 45% for the two passes, respectively, to obtain a pure titanium / 316 stainless steel / pure titanium layered composite billet.

[0056] Finally, the pure titanium / 316 stainless steel / pure titanium layered composite billet was sent into a resistance furnace at 750℃ for diffusion heat treatment for 20 minutes to obtain a pure titanium / 316 stainless steel / pure titanium composite plate with an interfacial bonding strength of 285MPa.

[0057] Example 4:

[0058] TC4 titanium alloy / S32304 duplex stainless steel composite plates were prepared using TC4 titanium alloy slabs with thicknesses of 2 mm and 3 mm and S32304 duplex stainless steel slabs, respectively, as raw materials.

[0059] First, the TC4 titanium alloy slab and the S32304 duplex stainless steel slab were softened and annealed respectively to obtain the soft TC4 titanium alloy slab and the S32304 duplex stainless steel slab.

[0060] Next, an offline mechanical grinding machine equipped with grinding wheels was used to grind the surfaces of the TC4 titanium alloy slab and the S32304 duplex stainless steel slab to be laminated, respectively, to remove contaminants and oxide layers from the surfaces to be laminated. The direction of the stripes formed by the mechanical grinding was perpendicular to the length direction of the slab.

[0061] Then, the mechanically polished TC4 titanium alloy slab and S32304 duplex stainless steel slab are stacked together and fed into a resistance furnace at 550℃ for 10 minutes in an argon atmosphere. After that, it is fed into a rolling mill for two-pass rolling composite, with rolling reduction rates of 50% and 30% for the two passes, respectively, to obtain TC4 titanium alloy / S32304 duplex stainless steel layered composite billet.

[0062] Finally, the TC4 titanium alloy / S32304 duplex stainless steel layered composite billet was placed in a resistance furnace at 700℃ for diffusion heat treatment for 60 minutes to obtain a TC4 titanium alloy / S32304 duplex stainless steel composite plate with an interfacial bonding strength of 400MPa.

[0063] Comparative Example 1:

[0064] Compared with Example 1, pure titanium / 304 stainless steel composite plates were prepared using single-sheet pure titanium slabs and 304 stainless steel slabs, each with a thickness of 3 mm, as raw materials.

[0065] First, the pure titanium slab and the 304 stainless steel slab were softened and annealed respectively to obtain the soft pure titanium slab and the 304 stainless steel slab.

[0066] Next, an angle grinder equipped with a grinding wheel was used to perform offline mechanical grinding on the surfaces of the pure titanium slab and the 304 stainless steel slab to be laminated, respectively, to remove contaminants and oxide layers from the surfaces to be laminated. The direction of the stripes formed by the mechanical grinding was perpendicular to the length direction of the slab.

[0067] Then, the mechanically ground pure titanium slab and 304 stainless steel slab are stacked together to obtain pure titanium / 304 stainless steel layered billet. The pure titanium / 304 stainless steel layered billet is then fed into a rolling mill for two-pass rolling composite. The rolling reduction rates of the two passes are 45% and 35% respectively, to obtain pure titanium / 304 stainless steel layered composite billet.

[0068] Finally, the pure titanium / 304 stainless steel layered composite billet was placed in a resistance furnace at 800℃ for diffusion heat treatment for 30 minutes, resulting in a pure titanium / 304 stainless steel composite plate with an interfacial bonding strength of 50 MPa. Figure 3 As shown, because the diffusion heat treatment temperature is increased to 150°C above the recrystallization temperature of 304 stainless steel, the rate at which brittle intermetallic compounds are formed at the interface of the titanium / 304 stainless steel composite plate is too fast, resulting in a sharp decrease in the interfacial bonding strength of the composite plate after diffusion heat treatment.

[0069] Comparative Example 2:

[0070] Compared with Example 3, pure titanium / 316 stainless steel / pure titanium composite plates were prepared using single-sheet pure titanium slabs and 316 stainless steel slabs with thicknesses of 1 mm and 3 mm, respectively, as raw materials.

[0071] First, the pure titanium slab and the 316 stainless steel slab were softened and annealed respectively to obtain the soft pure titanium slab and the 316 stainless steel slab.

[0072] Next, an angle grinder equipped with a grinding wheel was used to perform offline mechanical grinding on the surfaces of the pure titanium slab and the 316 stainless steel slab to be laminated, respectively, to remove contaminants and oxide layers from the surfaces to be laminated. The direction of the stripes formed by the mechanical grinding was perpendicular to the length direction of the slab.

[0073] Then, the mechanically polished pure titanium slab and 316 stainless steel slab are stacked in the order of pure titanium / 316 stainless steel / pure titanium to obtain a pure titanium / 316 stainless steel / pure titanium layered billet. The pure titanium / 316 stainless steel / pure titanium layered billet is then fed into a resistance furnace at 750℃ and heated for 10 minutes in an argon atmosphere. It is then immediately fed into a rolling mill for single-pass hot rolling composite with a rolling reduction rate of 60%, to obtain a pure titanium / 316 stainless steel / pure titanium composite plate. The interfacial bonding strength of the composite plate is 70MPa, and metallographic observation shows that a large number of brittle intermetallic compounds have been formed at the interface.

[0074] The above are merely specific embodiments of the present invention, but the protection of the present invention is not limited thereto. Any equivalent variations or substitutions of the features of the present technical solution that can be conceived by those skilled in the art are covered within the protection scope of the present invention. The protection scope of the present invention should be determined by the scope of the claims.

Claims

1. A method for producing a high interfacial bonding strength titanium / stainless steel layered composite material, characterized by, The method avoids generating a large amount of brittle intermetallic compounds at the titanium / stainless steel interface by synergistically controlling the temperature during roll bonding and diffusion heat treatment processes; The method comprises the following steps: Step 1: separately softening annealing titanium and stainless steel blanks to be compounded to obtain soft titanium and stainless steel blanks; Step 2: mechanically polishing the surfaces of the titanium and stainless steel blanks to be compounded, and forming polishing striations perpendicular to the length direction of the titanium and stainless steel blanks, and then layering and grouping the blanks into titanium / stainless steel layered blanks; Step 3: roll bonding the titanium / stainless steel layered blanks at room temperature for 2-10 passes to obtain titanium / stainless steel layered composite blanks; Step 4: short-time diffusion heat treatment of the titanium / stainless steel layered composite blanks in an air atmosphere for 10-60 min, and the diffusion heat treatment temperature is 100°C above the recrystallization temperature of the stainless steel, to obtain titanium / stainless steel layered composite materials with high interfacial bonding strength.

2. The method of claim 1, wherein the method is characterized by: In step 3, the rolling reduction rate of the first pass is ≥35%.

3. The method of claim 1, wherein the titanium / stainless steel laminate composite has an interfacial bonding strength of 50 MPa or more. The titanium and stainless steel blanks are at least one of wire, rod, pipe, plate, strip or profile, and are in single form, single block form or coiled form.

4. The method of claim 1, wherein the method is characterized by: The mechanical polishing is offline mechanical polishing or online mechanical polishing, and the polishing method is at least one of belt polishing, wheel polishing, abrasive wheel polishing, steel wire brush polishing, louver polishing or laser polishing.

5. The method of claim 1, wherein the method is characterized by: The layering and grouping of blanks are offline layering and grouping of blanks or online layering and grouping of blanks.

6. The method of claim 1, wherein the method is characterized by: The diffusion heat treatment heating is offline heating or online heating, and the heating method is at least one of resistance heating, flame heating, induction heating, pulse heating, radiation heating or laser heating.

7. The method of claim 1, wherein the titanium / stainless steel laminate composite has an interfacial bonding strength of 50 MPa or more. The titanium / stainless steel layered composite material has 2-10 layers.

8. The method of claim 1, wherein the titanium / stainless steel laminate composite has an interfacial bonding strength of 50 MPa or more. The titanium is pure titanium or an alloy thereof, and the stainless steel is martensitic stainless steel, ferritic stainless steel, austenitic stainless steel or duplex stainless steel.

9. A high interfacial bonding strength titanium / stainless steel laminate composite, characterized by, The titanium / stainless steel layered composite material with high interfacial bonding strength is prepared by the preparation method according to any one of claims 1-8.

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