Preparation method of titanium / steel composite plate with nano TiC interface layer

Abstract

The invention belongs to the technical field of layered metal compounding, and particularly relates to a preparation method of a titanium / steel composite plate with a nano TiC interface layer. The method comprises the following steps that (1) titanium powder is deposited on the surface of a steel plate through the cold spraying technology to form a titanium / steel pre-composite plate, the cold spraying gas pressure ranges from 3.0 MPa to 4.0 MPa, and the gas heating temperature ranges from 600 DEG C to 800 DEG C; (2) the titanium / steel pre-composite plate is placed in a muffle furnace to be heated to 750-850 DEG C, and after heat preservation is conducted for 1-10 min, the titanium / steel pre-composite plate is taken out for hot rolling; (3) single-pass rolling is adopted in the hot rolling process, the rolling reduction is 30-90%, and air cooling is conducted after rolling; and (4) the cooled plate is placed in a muffle furnace, heat preservation is conducted for 1-4 h at the temperature of 500-600 DEG C, and furnace cooling is conducted. The interface compound layer of the titanium / steel composite plate is a uniform and single TiC layer, the thickness is 100-500 nm, the shear strength of the titanium / steel composite plate is larger than or equal to 300 MPa, and the ductility of the whole plate is larger than or equal to 35%.

Description

Technical Field

[0001] The invention belongs to the technical field of layered metal composites, and in particular relates to a method for preparing a titanium / steel composite plate with a nano TiC interface layer. Background Art

[0002] Titanium / steel composite plates have excellent corrosion resistance, toughness and low cost, and are widely used in the fields of petroleum, chemical industry, electric power, marine engineering, etc. At present, the main technologies for preparing titanium / steel composite plates in industry include explosive composite, rolling composite, diffusion composite, explosion-rolling composite, etc. Since the heterogeneous interface structure is difficult to control, titanium / steel composite plates face the problems of interface brittle compound cracking, oxide inclusions and insufficient toughness.

[0003] The Chinese invention patent (publication number: CN116815100A) proposes a high bonding strength titanium steel composite plate material and its preparation method. When titanium or titanium alloy is composited with steel plate, due to the mutual diffusion of titanium and iron, brittle Ti-Fe intermetallic compounds will be formed at the interface of the composite plate. This brittle Ti-Fe intermetallic compound greatly reduces the bonding strength of the composite plate. In order to prevent the formation of brittle intermetallic compounds, the application adopts a Ni-Al intermediate layer to solve the problem of low bonding strength when the titanium steel composite plate is composited, but its disadvantage is that the bonding strength of the titanium steel composite plate obtained in its embodiment is only 50MPa, because the externally introduced Ni-Al intermediate layer does not have a good matching relationship with the lattices of the titanium layer and the steel layer on both sides.

[0004] References:

[0005] [1] BXLi, ZJChen, WJHe, PJWang, JSLin, Y.Wang, L.Peng, J.Li, Q.Liu, Effect of interlayer material and rolling temperature on microstructures and mechanical properties of titanium / steel clad plates, Materials Science and Engineering: A749 (2019) 241-248.

[0006] [2] B.Li, W.He, Z.Chen, T.Mo, L.Peng, J.Li, Q.Liu, Influence of annealing on the microstructure, interfacial compounds and mechanical properties of hotrolling bonded Ti / steel clad plate with bimetallic interlayered steel andvanadium, Materials Science and Engineering: A 764 (2019).

[0007] [3]JSHa, SIHong, Deformation and fracture of Ti / 439 stainless steelclad composite at intermediate temperatures, Materials Science and Engineering: A 651 (2016) 805-809.

[0008] [4]jsLin, Study on Microstructure and Mechanical Properties of Ti / Steel Clad plates with V+Cu Interlayers, CHongqing University, 2020.

[0009] [5] R.Wan, Study on tensile mechanical properties of titanium-cladsteel, China Building Materials Science & Technology 31(1)(2022)65-67.

[0010] [6] Jiang Jianbo, Li Wenmo, Liu Fangfang, Jiang Kun, Interfacial oxidation behavior of rolled titanium steel composite plates under different vacuum levels, Hot Working Technology, 1-5.

[0011] [7]L.Hai,H.Ban,X.Yang,Y.Shi,Low-cycle fatigue behaviour of hot-rolledtitanium-clad bimetallic steel,International Journal of Mechanical Sciences254(2023).

[0012] [8]T.N.Prasanthi,C.R.Sudha,S.Saroja,Explosive cladding and post-weldheat treatment of mild steel and titanium,Materials&Design 93(2016)180-193.

[0013] [9]H.Zhao,The Microstructure and Property of a Titanium-Carbon SteelClad Plate Prepared Using Explosive Welding,Metals 12(1)(2022).

[0014]

[10] X.Li,Z.Bi,Q.Wang,K.Rong,M.Xu,T.Zhang,J.Qian,Influence of copperfoil interlayer on microstructure and bonding properties of titanium-steelexplosive welded composite plate,Materials Today Communications 34(2023).

[0015]

[11] X.y.Zeng,Y.x.Wang,X.q.Li,X.j.Li,T.j.Zhao,Effects of gaseous mediaon interfacial microstructure and mechanical properties of titanium / steelexplosive welded composite plate,Fusion Engineering and Design 148(2019).

[0016]

[12] M.X.Xie,L.J.Zhang,G.F.Zhang,J.-X.Zhang,Z.Y.Bi,P.C.Li,Microstructure and mechanical properties of CP-Ti / X65 bimetallic sheetsfabricated by explosive welding and hotrolling,Materials&Design87(2015)181-197.

[0017]

[13] J.Wang,The study of the process and the rupture on the explosionwelding-rolling Ti-steel composites plate,Xian University of Architecture andTechnology,2004.

[0018]

[14] S.Kundu,S.Sam,S.Chatterjee,Interface microstructure and strengthproperties of Ti–6Al–4V and microduplex stainless steel diffusion bondedjoints,Materials&Design 32(5)(2011)2997-3003.

[0019]

[15] R.R.Kumar,R.K.Gupta,M.Sadhasivam,K.G.Pradeep,M.J.N.V.Prasad,Mechanical behaviour and interface correlative microscopic analysis of vacuumdiffusion bonded dissimilar stainless steel / α-Ti alloy joint for aerospaceapplications,Vacuum 217(2023).

[0020]

[16] S.Zakipour,M.Samavatian,A.Halvaee,A.Amadeh,A.Khodabandeh,Theeffect of interlayer thickness on liquid state diffusion bonding behavior ofdissimilar stainless steel 316 / Ti-6Al-4V system,Materials Letters 142(2015)168-171.

[0021]

[17] Z.Ren,X.Guo,X.Liu,X.Ma,S.Jiang,L.Bian,T.Wang,Q.Huang,Effect ofpulse current treatment on interface structure and mechanical behavior ofTA1 / 304 clad plates,Materials Science and Engineering:A 850(2022).

[0022]

[18] X.Chen,D.Inao,S.Tanaka,X.j.Li,I.A.Bataev,K.Hokamoto,Comparison ofexplosive welding of pure titanium / SUS 304 austenitic stainless steel andpure titanium / SUS 821L1 duplex stainless steel,Transactions of NonferrousMetals Society of China 31(9)(2021)2687-2702.

[0023]

[19] D.h.Yang,Z.a.Luo,G.m.Xie,T.Jiang,S.Zhao,R.D.K.Misra,Interfacialmicrostructure and properties of a vacuum roll-cladding titanium-steel cladplate with a nickel interlayer,Materials Science and Engineering:A 753(2019)49-58.

[0024]

[20] M.-k.Wang,Z.a.Luo,D.Li,G.m.Xie,R.D.K.Misra,Investigation on theinterfacial microstructure and mechanical properties of Ti alloy / HSLA steelclad plates fabricated by vacuum roll-cladding,Materials Science andEngineering:A 853(2022).

[0025]

[21] J.x.Zhao,Z.a.Luo,M.-k.Wang,G.m.Xie,J.p.Xv,Microstructure andmechanical property of titanium steel by vacuum roll-cladding withinterlayer,Materials Science and Technology 38(12)(2022)824-835.

[0026]

[22] C.Yu,L.Fu,H.Xiao,Q.Lv,B.Gao,Effect of carbon content on themicrostructure and bonding properties of hot-rolling pure titanium cladcarbon steel plates,Materials Science and Engineering:A 820(2021).

[0027]

[23] X.Guo,Z.Ren,X.Ma,N.Li,L.Bian,T.Wang,Effect of temperature andreduction ratio on the interface bonding properties of TC4 / 304platesmanufactured by EA rolling,Journal of Manufacturing Processes 64(2021)664-673.

[0028]

[24] HtJiang, Summary of the invention

[0029] In view of this, the purpose of the present invention is to provide a method for preparing a titanium / steel composite plate with a nano-TiC interface layer, which can accurately control the heat treatment to form a TiC layer by in-situ reaction between the titanium layer and the steel layer, which can ensure good metallurgical bonding and lattice matching with the metals on both sides, and inhibit the generation of Fe-Ti brittle compounds. The bonding strength of the obtained titanium-steel composite plate exceeds 300MPa. It can solve the problems of interface brittle compound cracking, oxidation inclusions and insufficient toughness of titanium / steel composite plates in the prior art.

[0030] The technical solution of the present invention is:

[0031] A method for preparing a titanium / steel composite plate having a nano-TiC interface layer comprises the following steps:

[0032] (1) Using cold spraying technology to deposit titanium powder on the surface of the steel plate to form a titanium / steel pre-composite plate, the cold spraying gas pressure is 3.0-4.0 MPa, and the gas heating temperature is 600-800°C;

[0033] (2) placing the titanium / steel pre-composite plate in a muffle furnace and heating it to 750-850° C., keeping the temperature for 1-10 minutes, and then taking it out for hot rolling;

[0034] (3) The hot rolling process is a single-pass rolling process with a reduction of 30-90%, followed by air cooling after rolling;

[0035] (4) The cooled plate is placed in a muffle furnace for annealing heat treatment, heated to 500-600°C and kept at this temperature for 1-4 hours, and then cooled in the furnace.

[0036] In the method for preparing the titanium / steel composite plate with a nano-TiC interface layer, in step (1), the titanium powder raw material is pure titanium or titanium alloy powder, and its particle size is 300-500 meshes.

[0037] In the method for preparing the titanium / steel composite plate with a nano-TiC interface layer, preferably, the titanium powder raw material is TA2 or TC4 powder, and the steel plate grade is Q235 or Q345.

[0038] In the method for preparing the titanium / steel composite plate with a nano-TiC interface layer, in step (1), the thickness of the titanium layer of the titanium / steel pre-composite plate is 0.1-2 mm, and the thickness of the steel plate is 1-10 mm.

[0039] In the method for preparing the titanium / steel composite plate with a nano-TiC interface layer, in step (2), the preferred heating temperature is 800-850° C. and the heat preservation time is 3-5 minutes.

[0040] In the method for preparing the titanium / steel composite plate with a nano-TiC interface layer, in step (3), the preferred rolling reduction is 50% to 70%.

[0041] In the method for preparing the titanium / steel composite plate with a nano-TiC interface layer, in step (4), the preferred annealing temperature is 530-550° C., and the temperature is maintained for 2-3 hours.

[0042] In the method for preparing the titanium / steel composite plate with a nano-TiC interface layer, the interface compound layer of the titanium / steel composite plate is a uniform and single TiC layer with a thickness of 100-500nm.

[0043] The method for preparing the titanium / steel composite plate with a nano-TiC interface layer has a shear strength of ≥300MPa and a fracture elongation of ≥35%.

[0044] The design concept of the present invention is:

[0045] The present invention utilizes the low temperature, high speed and non-oxidation characteristics of cold spraying to prepare a titanium / steel pre-composite plate. Due to the high-density deformation energy accumulated during the spraying process, the diffusion barrier at the titanium / steel interface is reduced, so that the critical rolling temperature for titanium / steel to achieve metallurgical bonding is reduced to below 850°C. By strictly controlling the rolling and annealing processes, a continuous nano-scale TiC layer can be in-situ generated at the titanium / steel interface to act as a diffusion barrier, thereby inhibiting the generation of brittle compounds such as FeTi, and obtaining a high-performance titanium / steel composite plate.

[0046] Since the in-situ generated nano-scale TiC interface layer maintains a good lattice coherence with the titanium layer and steel layer on both sides, the strength and toughness of the interface layer are greatly improved, and the debonding or cracking of the interface layer is effectively avoided. However, the traditional composite plate preparation process will produce micron-level Fe-Ti compounds at the interface, and the technology of adding an intermediate layer externally cannot prepare a titanium-steel composite plate with a nano-scale interface layer.

[0047] The advantages and beneficial effects of the present invention are:

[0048] The present invention deposits titanium powder on the surface of a steel plate by cold spraying to form a titanium / steel pre-composite plate, places the pre-composite plate in a muffle furnace, heats it to a certain temperature, and then performs hot rolling, and then performs annealing treatment to obtain a titanium / steel composite plate. The interface compound layer of the titanium / steel composite plate of the present invention is a uniform and single TiC layer with a thickness of 100 to 500 nm, the shear strength of the titanium / steel composite plate is ≥300 MPa, the elongation of the whole plate is ≥35%, and the mechanical properties are better than those of other processes.

[0049] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 The transmission electron microscope photos of the interface structure of the titanium / steel composite plate prepared in Example 1. Among them, (a) is a bright field photo of the interface structure, (b) is a concentration distribution diagram of the Ti element at the titanium / steel interface, (c) is a concentration distribution diagram of the Fe element at the titanium / steel interface, (d) is a selected area electron diffraction diagram of the TiC compound at the titanium / steel interface, (e) is a concentration distribution diagram of the C element at the titanium / steel interface, and (f) is a concentration distribution diagram of the O element at the titanium / steel interface.

[0051] Figure 2 The figure is a comparison of the mechanical properties of the titanium / steel composite plate obtained in Example 1 of the present invention with the properties of other titanium / steel composite plates reported in the literature. In the figure, the tensile strength and elongation of the titanium / steel composite plate obtained in Example 1 are 630 MPa and 29% in the hot-rolled state, and 599 MPa and 36% in the annealed state, respectively, which are better than the titanium / steel composite plates prepared by various other technologies reported in the references.

[0052] Figure 3 The present invention is a flow chart for preparing a titanium / steel composite plate having a nano-TiC interface layer. DETAILED DESCRIPTION

[0053] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0054] In order to make the technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with specific embodiments.

[0055] Example 1

[0056] like Figure 3 As shown, this embodiment provides a method for preparing a titanium / steel composite plate with a nano-TiC interface layer, comprising the following steps:

[0057] (1) Using cold spraying technology, TA2 powder with a particle size of 300-400 mesh is deposited on the surface of Q235 steel plate to form a TA2 / Q235 pre-composite plate. The cold spraying gas pressure is 4.0 MPa and the gas heating temperature is 800°C.

[0058] In this embodiment, the compressed air outlet in the high-pressure gas cylinder is divided into two routes: one route is connected to the powder feeder, and the compressed air carries the TA2 powder in the powder feeder and is output through the pipeline; the other route is connected to the heater, and the compressed air heated by the heater is output through the pipeline; the two pipelines converge at the nozzle to preheat the TA2 powder, and then spray it on the surface of the Q235 steel plate to form a titanium layer. The thickness of the Q235 steel plate is 2mm, and the thickness of the titanium layer is 2mm.

[0059] (2) The TA2 / Q235 pre-clad plate was placed in a muffle furnace and heated to 800°C. After keeping the temperature for 3 minutes, the plate was taken out for hot rolling. The hot rolling process was a single-pass rolling process with a reduction of 50%. After rolling, the plate was air-cooled to room temperature.

[0060] (3) The cooled plate is placed in a muffle furnace for annealing heat treatment, heated to 550°C and kept at this temperature for 2 h, and then cooled to room temperature.

[0061] like Figure 1 As shown, the interface structure of the titanium / steel composite plate obtained in this embodiment has a uniform single TiC layer on the interface with a thickness of about 200 nm.

[0062] like Figure 2 As shown, the tensile strength of the titanium / steel composite plate obtained in this embodiment reaches 599 MPa, the elongation at break reaches 36%, and the shear strength reaches 306 MPa, and the mechanical properties exceed those of the titanium / steel composite plates prepared by other methods reported in the references.

[0063] Example 2

[0064] like Figure 3 As shown, this embodiment provides a method for preparing a titanium / steel composite plate with a nano-TiC interface layer, comprising the following steps:

[0065] (1) Using cold spraying technology, TC4 powder with a particle size of 300-400 mesh is deposited on the surface of Q345 stainless steel plate to form a TC4 / Q345 pre-composite plate. The cold spraying gas pressure is 3.5 MPa and the gas heating temperature is 700°C.

[0066] In this embodiment, the compressed air outlet in the high-pressure gas cylinder is divided into two routes: one route is connected to the powder feeder, and the compressed air carries the TC4 powder in the powder feeder and is output through the pipeline; the other route is connected to the heater, and the compressed air heated by the heater is output through the pipeline; the two pipelines converge at the nozzle to preheat the TC4 powder, and then spray it on the surface of the Q345 steel plate to form a titanium layer. The thickness of the Q345 steel plate is 4mm, and the thickness of the titanium layer is 1mm.

[0067] (2) The TC4 / Q345 pre-clad plate was placed in a muffle furnace and heated to 850°C. After keeping the temperature for 3 minutes, the plate was taken out for hot rolling. The hot rolling process was a single-pass rolling process with a reduction of 70%. After rolling, the plate was air-cooled to room temperature.

[0068] (3) The cooled plate is placed in a muffle furnace for annealing heat treatment, heated to 500°C for 3 hours, and then cooled to room temperature.

[0069] The interface structure of the titanium / steel composite plate obtained in this embodiment has a uniform single TiC layer on the interface with a thickness of about 500nm. The tensile strength of the whole plate reaches 560MPa, the elongation at break reaches 35%, and the shear strength reaches 320MPa.

[0070] The implementation results show that the shear strength of the titanium / steel composite plate obtained by the method of the present invention is ≥300MPa, and the elongation at break is ≥35%, which is better than the titanium / steel composite plate prepared by other technologies reported in the literature. The present invention is a continuous and necessary step combined with specific process parameters to achieve the effect described in this application.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A method for preparing a titanium / steel composite plate having a nano-TiC interface layer, characterized in that: The following steps are included: (1) Using cold spraying technology to deposit titanium powder on the surface of the steel plate to form a titanium / steel pre-composite plate, the cold spraying gas pressure is 3.0-4.0 MPa, and the gas heating temperature is 600-800°C; (2) placing the titanium / steel pre-composite plate in a muffle furnace and heating it to 750-850° C., keeping the temperature for 1-10 minutes, and then taking it out for hot rolling; (3) The hot rolling process is a single-pass rolling process with a reduction of 30-90%, followed by air cooling after rolling; (4) The cooled plate is placed in a muffle furnace for annealing heat treatment, heated to 500-600°C and kept at this temperature for 1-4 hours, and then cooled in the furnace.

2. The method for preparing a titanium / steel composite plate having a nano-TiC interface layer according to claim 1, characterized in that: In step (1), the titanium powder raw material is pure titanium or titanium alloy powder, and its particle size is 300-500 mesh.

3. The method for preparing a titanium / steel composite plate having a nano-TiC interface layer according to claim 2, characterized in that: Preferably, the titanium powder raw material is TA2 or TC4 powder, and the steel plate grade is Q235 or Q345.

4. The method for preparing a titanium / steel composite plate having a nano-TiC interface layer according to claim 1, characterized in that: In step (1), the thickness of the titanium layer of the titanium / steel pre-composite plate is 0.1 to 2 mm, and the thickness of the steel plate is 1 to 10 mm.

5. The method for preparing a titanium / steel composite plate having a nano-TiC interface layer according to claim 1, characterized in that: In step (2), the preferred heating temperature is 800-850° C. and the insulation time is 3-5 min.

6. The method for preparing a titanium / steel composite plate having a nano-TiC interface layer according to claim 1, characterized in that: In step (3), the preferred rolling reduction is 50% to 70%.

7. The method for preparing a titanium / steel composite plate having a nano-TiC interface layer according to claim 1, characterized in that: In step (4), the preferred annealing temperature is 530-550° C., and the temperature is maintained for 2-3 hours.

8. The method for preparing a titanium / steel composite plate having a nano-TiC interface layer according to claim 1, characterized in that: The interface compound layer of the titanium / steel composite plate is a uniform and single TiC layer with a thickness of 100 to 500 nm.

9. The method for preparing a titanium / steel composite plate having a nano-TiC interface layer according to any one of claims 1 to 8, characterized in that: The shear strength of the titanium / steel composite plate is ≥300MPa and the elongation at break is ≥35%.

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