Titanium-steel clad plate material with high bonding strength and preparation method thereof

Abstract

The application provides a titanium-steel composite plate material with high bonding strength and corrosion resistance and a preparation method thereof. In the application, one or more of more efficient cold spraying, supersonic flame spraying and atmospheric plasma spraying methods are used to spray a Ni-Al intermediate and surface Ti or Ti alloy coating on one side or both sides of a steel plate, and a composite steel plate is obtained through rolling and then heat treatment. The application can mass-produce the titanium-steel composite plate in a continuous manner, precisely control the thickness of the composite layer, save material cost to the maximum extent, and the titanium-steel composite plate prepared by the application has higher bonding strength than that prepared by a traditional method.

Description

TECHNICAL FIELD

[0001] The application provides a titanium-steel composite plate material with high bonding strength and corrosion resistance and a preparation method thereof, and belongs to the technical field of metal corrosion prevention. BACKGROUND

[0002] Titanium and its alloys have a dense oxide film on the surface, and have good stability in acidic, alkaline, neutral salt aqueous solutions and oxidizing media, and are widely used as various chemical reaction containers, heat exchanger materials and in the field of corrosion prevention, but the disadvantage is that the cost is high, especially when used as a structural component, this problem is particularly prominent. The titanium-steel composite plate produced by explosion bonding has the corrosion resistance of titanium and the strength and plasticity of ordinary steel plate as a structural component, and importantly, the cost is greatly reduced. With the continuous progress of equipment manufacturing technology in China, the application field of titanium-steel composite plate materials will be continuously expanded.

[0003] The commonly used manufacturing methods of titanium-steel composite plates include rolling bonding method, explosion bonding method and surfacing method. The most commonly used method is rolling. In the rolling process, the surface of the base material and the cladding metal bonded with the base material is cleaned, the cladding metal and the base material are stacked and hot rolling or cold rolling is performed. The cladding metal and the base metal are metallurgically bonded. In this method, titanium or titanium alloy is used as the cladding metal, and carbon steel, low alloy steel and high alloy steel are used as the base material. When titanium or titanium alloy is combined 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, a Cu, Ni, Mo, Nb, V metal transition layer is introduced between titanium and steel.

[0004] There are two problems in the traditional use of Mo, Nb or V as a transition layer. The first problem is the increase in manufacturing cost because Mo, Nb or V metal materials are expensive. The second problem is that the Mo, Nb or V transition layer lacks toughness and is prone to fracture during rolling. These problems make the titanium-steel composite plate using Mo, Nb or V as a transition layer unable to be put into practical application. When Cu, Ni is used as a transition layer, the bonding strength of the titanium-steel composite layer is not enough. SUMMARY

[0005] In view of the above technical problems, the application provides a titanium-steel composite plate material with high bonding strength and a preparation method thereof. The application aims to solve the following technical problems:

[0006] 1. Overcome the problem of low bonding strength in the preparation of titanium steel composite plate by traditional method. When titanium or titanium alloy is combined with steel plate, brittle Ti-Fe intermetallic compound will be formed at the interface of the composite plate due to the mutual diffusion of titanium and iron. This brittle Ti-Fe intermetallic compound greatly reduces the bonding strength of the composite plate. The present application uses Ni-Al intermediate layer to solve the problem of low bonding strength in the preparation of titanium steel composite plate.

[0007] 2. The problems of high production cost, low production efficiency, complex process, large investment, high equipment requirement and pollution of Mo, Nb, V, Cu and Ni as transition layer are solved. The method described in the present application has short preparation process and excellent performance of the composite plate.

[0008] 3. The product variety of corrosion-resistant composite steel plate is expanded, the corrosion-resistant performance of the composite steel plate is greatly improved by realizing the combination of various corrosion-resistant metals / ceramic materials.

[0009] The technical scheme adopted by the present application is as follows:

[0010] A preparation method of a titanium steel composite plate material with high bonding strength, comprising the following steps:

[0011] S1, pretreating the base steel plate, which includes mechanical polishing and sand blasting treatment of the steel plate.

[0012] S2, spraying a NiAl intermediate layer and a Ti or titanium alloy coating on one side or both sides of the steel plate by using one or more of cold spraying, high-velocity oxygen fuel spraying and atmospheric plasma spraying; wherein the alloy composition of the NiAl intermediate layer is 35%-45% of Al by mass percentage and 55%-65% of Ni by mass percentage, the thickness is 100-300 mu m, the thickness of the titanium or titanium alloy coating is 500-1000 mu m;

[0013] The cold spraying parameters are as follows: spraying distance: 10-30 mm, gas temperature: 250-450 DEG C, main gas pressure: 2-5 MPa, powder feeding pressure: 2-5 MPa, and gun moving speed: 50-200 mm / s.

[0014] The high-velocity oxygen fuel spraying parameters are as follows: oxygen flow: 1900-2000 SCFH, kerosene flow: 20-21 LPH, powder feeding speed: 4.5-5.5 RPN, and spraying distance: 360-400 mm.

[0015] The plasma spraying parameters are as follows: spraying distance: 80-120 mm, spraying current: 350-500 A, spraying voltage: 40-50 V, powder feeding voltage: 4-7 V, gun moving speed: 50-200 mm / s, H2 flow: 1-5 L / min, and Ar2 flow: 50-70 L / min.

[0016] The electric arc spraying parameters are as follows: the spraying distance is 100mm-200mm, the spraying gun moving speed is 30cm / s-50cm / s, the wire feeding speed is 1cm / s-15cm / s, the air pressure used in spraying is 0.4MPa-0.7MPa, the spraying voltage is 28-40V, and the spraying current is 150-300A.

[0017] S3, the composite plate after spraying is subjected to rolling treatment until the composite plate is rolled to a specified deformation amount (>30%), and a composite steel plate is obtained;

[0018] S4, the composite steel plate after rolling is subjected to stress relief heat treatment, the heat treatment temperature is 600-900℃, and the atmosphere is protected;

[0019] S5, the high-performance corrosion-resistant composite steel plate is obtained by cooling.

[0020] The beneficial effects brought by the technical scheme of the present application are as follows:

[0021] 1. The present application can mass-produce high-performance titanium steel composite plates, precisely control the thickness of the composite layer, save material costs to the maximum, and the prepared titanium steel composite plate has higher bonding strength than the traditional preparation method.

[0022] 2. The present application uses Ni-Al as the intermediate layer, which saves material costs to the maximum and improves the bonding strength of the titanium steel composite plate.

[0023] 3. The present application can not be affected by the properties of the composite layer material, and can expand the types of finished products. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the titanium steel structure of the present application. DETAILED DESCRIPTION

[0025] The specific technical scheme of the present application is illustrated in combination with the embodiments.

[0026] The technical scheme adopted by the present application is as follows:

[0027] Embodiment 1

[0028] Example 1 The surface of 120X400X2mm steel plate is mechanically polished to remove surface scale and impurities such as contaminants, the surface of the steel plate is treated by sand blasting machine, the Ni40Al intermediate layer with a thickness of 150μm and the TiAl outer layer with a thickness of 750μm are sprayed on the surface of the steel by supersonic flame spraying, the spraying parameters are as follows: oxygen flow rate: 1900SCFH; kerosene flow rate: 20LPH; powder feeding speed: 4.5RPN; spraying distance: 360mm. The sprayed composite plate is sent to a two-roller experimental rolling mill for rolling treatment, the single pass reduction is 15%, the total deformation of the plate is 30% after repeated rolling for two times, finally the composite titanium steel plate after rolling is stress relieved to obtain the titanium steel composite plate, the annealing temperature is 850℃, argon is introduced into the heating zone to prevent the composite steel plate from being oxidized at high temperature, the purity of the argon is greater than or equal to 99.99%.

[0029] The titanium steel composite plate of the present example has a composite rate of more than 99%, the bonding strength is 50MPa, has good bonding strength and high yield, and no delamination and cracking occurs.

[0030] Example 2

[0031] Example 2 The surface of 120X400X2mm steel plate is mechanically polished to remove surface scale and impurities such as contaminants, the surface of the steel plate is treated by sand blasting machine, the Ni40Al intermediate layer with a thickness of 100μm and the pure titanium outer layer with a thickness of 500μm are sprayed on the surface of the steel by arc spraying, the spraying process parameters are as follows: spraying distance: 100mm, compressed air pressure: 0.6MPa, spraying voltage: 36V, spraying current: 240A, wire feeding speed: 9cm / s. The sprayed composite plate is sent to a two-roller experimental rolling mill for rolling treatment, the single pass reduction is 10%, the total deformation of the plate is 30% after repeated rolling for three times, finally the composite titanium steel plate after rolling is stress relieved to obtain the titanium steel composite plate, the annealing temperature is 600℃, argon is introduced into the heating zone to prevent the composite steel plate from being oxidized at high temperature, the purity of the argon is greater than or equal to 99.99%.

[0032] The titanium steel composite plate of the present example has a composite rate of more than 99%, the bonding strength is 30MPa, has good bonding strength and high yield, and no delamination and cracking occurs.

[0033] Example 3

[0034] Example 3 The surface of a 120X400X2mm steel plate was mechanically polished to remove surface oxides and contaminants and the like impurities, the surface of the steel plate was sandblasted using a sandblasting machine, a 100μm-thick Ni35Al intermediate layer and a 750μm-thick TC4 outer layer were sprayed on the surface of the steel plate by plasma spraying, the spraying parameters were as follows: spraying distance: 120mm, spraying current: 500A, spraying voltage: 50V, powder feeding voltage: 7V, spraying gun moving speed: 100mm / s, H2flow rate: 2L / min, Ar2flow rate: 70L / min. The sprayed composite plate was sent to a two-roller experimental rolling mill for rolling treatment, the single pass reduction was 10%, the total deformation of the plate was 40% after repeated rolling four times, finally the rolled composite titanium steel plate was stress relieved to obtain a titanium steel composite plate, the annealing temperature was 900℃, argon was introduced into the heating zone to prevent the composite steel plate from being oxidized at high temperature, the purity of the argon was greater than or equal to 99.99%.

[0035] The titanium steel composite plate prepared in this example had a composite rate of more than 95% and a bonding strength of 30MPa, had good bonding strength and high yield, and did not have delamination and cracking.

Claims

1. A method for manufacturing a high bonding strength titanium steel clad plate material, characterized by, It comprises the following steps: S1, pretreating the base steel plate; S2, spraying the intermediate layer and titanium coating on one side or both sides of the steel plate; The spraying method is one or more of cold spraying, high velocity oxygen fuel spraying, atmospheric plasma spraying and arc spraying; The intermediate layer is NiAl, and the alloy composition of the NiAl is 35-45% of Al by mass percentage and 55-65% of Ni by mass percentage; the thickness of the intermediate layer is 100-300 μm; the titanium coating is pure titanium or titanium alloy coating; the thickness of the pure titanium or titanium alloy coating is 500-1000 μm; S3, rolling the sprayed composite plate until the composite plate is rolled to a specified deformation amount to obtain a composite steel plate; S4, stress relieving the rolled composite steel plate; S5, cooling to obtain a titanium-steel composite plate with high bonding strength.

2. The method of claim 1, wherein the method further comprises the steps of: The cold spraying parameters are as follows: spraying distance: 10-30 mm, gas temperature: 250-450℃, main gas pressure: 2-5 MPa, powder feeding pressure: 2-5 MPa, and gun moving speed: 50-200 mm / s. ​ 3. The method of claim 1, wherein the high bonding strength titanium steel clad plate material is prepared by the steps of: preparing a titanium plate; preparing a steel plate; and bonding the titanium plate and the steel plate to each other. The high velocity oxygen fuel spraying parameters are as follows: oxygen flow rate: 1900-2000 SCFH; kerosene flow rate: 20-21 LPH; and spraying distance: 360-400 mm.

4. The method of claim 1, wherein the high bonding strength titanium steel clad plate material is prepared by the steps of: preparing a titanium plate; preparing a steel plate; and bonding the titanium plate and the steel plate to each other. The plasma spraying parameters are as follows: spraying distance: 80-120 mm, spraying current: 350-500 A, spraying voltage: 40-50 V, powder feeding voltage: 4-7 V, gun moving speed: 50-200 mm / s, H2 flow rate: 1-5 L / min, and Ar2 flow rate: 50-70 L / min.

5. The method of claim 1, wherein the high bonding strength titanium steel clad plate material is prepared by the steps of: preparing a titanium plate; preparing a steel plate; and bonding the titanium plate and the steel plate to each other. The arc spraying parameters are as follows: spraying distance: 100-200 mm, gun moving speed: 30-50 cm / s, wire feeding speed: 1-15 cm / s, air pressure: 0.4-0.7 MPa, spraying voltage: 28-40 V, and spraying current: 150-300 A.

6. The method according to claim 1, wherein the heat treatment temperature in the step S4 is 600-900℃ under atmosphere protection.

7. A titanium-steel composite plate with high bonding strength, which is prepared by the method according to any one of claims 1 to 6.

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