CN114540606A - Preparation method of high-hardness titanium alloy sheet and foil - Google Patents
Preparation method of high-hardness titanium alloy sheet and foil Download PDFInfo
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- CN114540606A CN114540606A CN202210222241.5A CN202210222241A CN114540606A CN 114540606 A CN114540606 A CN 114540606A CN 202210222241 A CN202210222241 A CN 202210222241A CN 114540606 A CN114540606 A CN 114540606A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
- C25D5/14—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
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Abstract
The invention provides a preparation method of a high-hardness titanium alloy sheet and foil, and relates to the technical field of titanium alloy plate processing. The method adopts the method of electroplating and vacuum hot pressing sintering to prepare the high-hardness titanium alloy sheet, and adopts the method of electroplating and diffusion reaction (pretreatment and second vacuum heat treatment) to prepare the high-hardness titanium alloy foil, so that the problem that TiNi60-Cr intermetallic compounds are difficult to process is solved, and the method is more suitable for preparing the high-hardness titanium alloy foil or sheet. Moreover, the preparation method provided by the invention has low production cost and high production efficiency.
Description
Technical Field
The invention relates to the technical field of titanium alloy plate processing, in particular to a preparation method of a high-hardness titanium alloy sheet and foil.
Background
The TiNi60 alloy has the advantages of high strength, high hardness (HRC can reach 58-62), high specific strength, low elastic modulus, good dimensional stability, excellent wear resistance and corrosion resistance, and not only has the characteristics of partial ceramics, but also has the elasticity and plasticity of metal materials. If 5-10% of Cr element is added to the TiNi60 alloy, the hardness, wear resistance and the like of the alloy can be further improved. However, TiNi60-Cr alloy is an ordered intermetallic compound, the processing difficulty is large, and the main preparation way at present is casting and powder metallurgy. If the conventional processing method (smelting → forging → rolling) or casting method + rolling or powder metallurgy method + rolling method of titanium and titanium alloy thin plate is adopted, the problem that TiNi60-Cr alloy is difficult to be rolled and processed cannot be avoided, and TiNi60-Cr alloy foil and thin plate cannot be prepared. Therefore, it is necessary to develop a method for preparing high-hardness titanium alloy foils and sheets to broaden the application of the materials.
Disclosure of Invention
The invention aims to provide a method for preparing a high-hardness titanium alloy thin plate and foil, which avoids the problem that TiNi60-Cr intermetallic compounds are difficult to process, can prepare the high-hardness titanium alloy foil and thin plate, and has low production cost and high production efficiency.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of a high-hardness titanium alloy sheet and foil, which comprises the following steps:
sequentially electroplating nickel and chromium on the surface of the titanium foil to obtain a titanium alloy semi-finished foil;
carrying out vacuum heat treatment on the titanium alloy semi-finished product foil to obtain a dehydrogenated titanium alloy semi-finished product foil;
aligning and stacking at least two dehydrogenation titanium alloy semi-finished foils along the thickness direction, and performing vacuum hot-pressing sintering to obtain a titanium alloy semi-finished plate;
carrying out heat treatment on the titanium alloy semi-finished plate to obtain a high-hardness titanium alloy thin plate;
the preparation method of the high-hardness titanium alloy foil comprises the following steps:
sequentially electroplating nickel and chromium on the surface of the titanium coiled material to obtain a titanium alloy semi-finished coiled material;
carrying out first vacuum heat treatment on the titanium alloy semi-finished product coiled material to obtain a dehydrogenated titanium alloy semi-finished product coiled material;
sequentially carrying out pretreatment and second vacuum heat treatment on the hydrogen-removed titanium alloy semi-finished product coiled material to obtain a titanium alloy semi-finished product foil; the pre-treatment atmosphere is atmospheric air;
and carrying out heat treatment on the titanium alloy semi-finished foil to obtain the high-hardness titanium alloy foil.
Preferably, the thicknesses of the titanium foil and the titanium coiled material are 0.04-0.1 mm independently; the titanium foil and the titanium coiled material are independently TA1 or TA 2.
Preferably, the content of nickel element in the titanium alloy semi-finished foil and the titanium alloy semi-finished coiled material is 60 wt%; the content of chromium in the titanium alloy semi-finished product foil and the titanium alloy semi-finished product coiled material is independently 5-10 wt%.
Preferably, the temperature of the vacuum heat treatment is 600-700 ℃, and the heat preservation time is 2-6 h.
Preferably, the temperature of the vacuum hot-pressing sintering is 880-940 ℃, the sintering pressure is 10-15 MPa, and the heat preservation time is 2-5 h.
Preferably, the temperature of the first vacuum heat treatment is 600-700 ℃, and the heat preservation time is 2-6 h.
Preferably, the temperature of the pretreatment is 600-700 ℃, and the heat preservation time is 20-40 min;
the temperature of the second vacuum heat treatment is 850-900 ℃, and the heat preservation time is 2-4 h.
Preferably, the temperature of the heat treatment is 400-450 ℃, and the heat preservation time is 2-6 h.
Preferably, the thickness of the high-hardness titanium alloy sheet is 0.3-1.0 mm.
Preferably, the thickness of the high-hardness titanium alloy foil is less than 0.1 mm.
The invention provides a method for preparing a high-hardness titanium alloy thin plate and a high-hardness titanium alloy foil, which are characterized in that the method for preparing the high-hardness titanium alloy thin plate by adopting electroplating and vacuum hot pressing sintering and the method for preparing the high-hardness titanium alloy foil by adopting electroplating and diffusion reaction (pretreatment and second vacuum heat treatment) avoid the problem that TiNi60-Cr intermetallic compounds are difficult to process, and are more suitable for preparing the high-hardness titanium alloy foil or the high-hardness titanium alloy foil. Moreover, the preparation method provided by the invention has low production cost and high production efficiency.
Detailed Description
The invention provides a preparation method of a high-hardness titanium alloy sheet, which comprises the following steps:
sequentially electroplating nickel and chromium on the surface of the titanium foil to obtain a titanium alloy semi-finished foil;
carrying out vacuum heat treatment on the titanium alloy semi-finished product foil to obtain a dehydrogenated titanium alloy semi-finished product foil;
aligning and stacking at least two dehydrogenation titanium alloy semi-finished foils along the thickness direction, and performing vacuum hot-pressing sintering to obtain a titanium alloy semi-finished plate;
and carrying out heat treatment on the titanium alloy semi-finished plate to obtain the high-hardness titanium alloy sheet.
The invention sequentially electroplates nickel and chromium on the surface of the titanium foil to obtain the titanium alloy semi-finished foil. In the invention, the thickness of the titanium foil is preferably 0.04-0.1 mm, more preferably 0.05-0.08 mm, and further preferably 0.06-0.07 mm; the titanium foil is preferably TA1 or TA 2. In the present invention, the titanium foil is preferably subjected to surface degreasing before being subjected to nickel electroplating.
The present invention has no special requirements for the specific processes of nickel and chromium electroplating, and the electroplating process known to those skilled in the art can be adopted. In the invention, the thickness of the nickel layer obtained by nickel electroplating is preferably controlled by controlling the mass percent of Ni to be 60%; the thickness of the chromium layer obtained by chromium electroplating is preferably controlled by controlling the mass percent of Cr to be 5-10%. Preferably, after the nickel is electroplated, the foil is washed by water and then electroplated with chromium; the water washing is preferably deionized water washing.
In the invention, the content of nickel element in the titanium alloy semi-finished foil is preferably 60 wt%; the content of the chromium element in the titanium alloy semi-finished foil is preferably 5-10 wt%, and more preferably 8-9 wt%.
After the titanium alloy semi-finished product foil is obtained, the titanium alloy semi-finished product foil is subjected to vacuum heat treatment to obtain the dehydrogenated titanium alloy semi-finished product foil. In the invention, the temperature of the vacuum heat treatment is preferably 600-700 ℃, and more preferably 650-680 ℃; the heat preservation time is preferably 2-6 h, and more preferably 3-4 h. According to the invention, preferably, after the vacuum heat treatment, the foil is cooled to room temperature along with the furnace, so as to obtain the dehydrogenation titanium alloy semi-finished foil.
In the invention, hydrogen is easy to be separated out in the electroplating process, the performance of the plate after hydrogen separation is easy to be deteriorated, and the invention removes hydrogen by vacuum heat treatment to improve the performance of the titanium alloy.
After the dehydrogenation titanium alloy semi-finished foil is obtained, aligning and stacking at least two dehydrogenation titanium alloy semi-finished foils along the thickness direction, and performing vacuum hot-pressing sintering to obtain the titanium alloy semi-finished plate. In the invention, the number of stacked pieces of the dehydrogenation titanium alloy semi-finished foil is subject to the requirement of meeting the thickness of the high-hardness titanium alloy thin plate.
In the invention, the temperature of the vacuum hot-pressing sintering is preferably 880-940 ℃, and more preferably 900-930 ℃; the sintering pressure is preferably 10-15 MPa, and more preferably 13-14 MPa; the heat preservation time is preferably 2-5 h, and more preferably 3-4 h. In the present invention, the vacuum hot press sintering is preferably performed in an alumina ceramic mold. According to the invention, preferably, after the vacuum hot-pressing sintering, the obtained plate is cooled to room temperature along with a furnace, so as to obtain the titanium alloy semi-finished plate.
After the titanium alloy semi-finished plate is obtained, the titanium alloy semi-finished plate is subjected to heat treatment to obtain the high-hardness titanium alloy sheet. In the invention, the temperature of the heat treatment is preferably 400-450 ℃, and more preferably 420-430 ℃; the heat preservation time is preferably 2-6 h, and more preferably 3-4 h. In the present invention, the atmosphere of the heat treatment is preferably vacuum. The invention can precipitate the phase which is beneficial to improving the hardness of the alloy by carrying out heat treatment.
In the present invention, the thickness of the high-hardness titanium alloy sheet is preferably 0.3 to 1.0mm, and more preferably 0.429 to 0.6 mm. In the invention, the chemical components of the high-hardness titanium alloy sheet are as follows by mass percent: the alloy comprises, by weight, Ni 60%, Cr 5-10%, and the balance titanium.
In the present invention, the hardness of the high-hardness titanium alloy thin plate is preferably HRC62 to HRC 64.
The invention provides a preparation method of a high-hardness titanium alloy foil, which comprises the following steps:
sequentially electroplating nickel and chromium on the surface of the titanium coiled material to obtain a titanium alloy semi-finished coiled material;
carrying out first vacuum heat treatment on the titanium alloy semi-finished product coiled material to obtain a dehydrogenated titanium alloy semi-finished product coiled material;
sequentially carrying out pretreatment and second vacuum heat treatment on the hydrogen-removed titanium alloy semi-finished product coiled material to obtain a titanium alloy semi-finished product foil; the pre-treatment atmosphere is atmospheric air;
and carrying out heat treatment on the titanium alloy semi-finished foil to obtain the high-hardness titanium alloy foil.
The invention sequentially electroplates nickel and chromium on the surface of the titanium coiled material to obtain the titanium alloy semi-finished coiled material. In the invention, the thickness of the titanium coiled material is preferably 0.04-0.1 mm, and more preferably 0.045-0.05 mm; the titanium coil is preferably TA1 or TA 2. In the present invention, the titanium coil is preferably subjected to surface degreasing before being subjected to nickel electroplating.
The present invention has no special requirements for the specific processes of nickel and chromium electroplating, and the electroplating process known to those skilled in the art can be adopted. In the invention, the thickness of the nickel layer obtained by nickel electroplating is preferably controlled by controlling the mass percent of Ni to be 60%; the thickness of the chromium layer obtained by chromium electroplating is preferably controlled on the basis of controlling the mass percent of Cr to be 5-10%. According to the invention, preferably, after the nickel electroplating, the obtained coiled material is washed by water and then electroplated with chromium; the water washing is preferably deionized water washing.
In the invention, the content of nickel element in the titanium alloy semi-finished coiled material is preferably 60 wt%; the content of chromium in the titanium alloy semi-finished coiled material is preferably 5-10 wt%, and more preferably 9 wt%.
After the titanium alloy semi-finished coiled material is obtained, the titanium alloy semi-finished coiled material is subjected to first vacuum heat treatment to obtain the dehydrogenation titanium alloy semi-finished coiled material. In the invention, the temperature of the first vacuum heat treatment is preferably 600-700 ℃, and more preferably 650-680 ℃; the heat preservation time is preferably 2-6 h, and more preferably 3-5 h. According to the invention, preferably, after the first vacuum heat treatment, the obtained coiled material is cooled to room temperature along with the furnace, so as to obtain the dehydrogenation titanium alloy semi-finished coiled material.
In the invention, hydrogen is easy to be separated out in the electroplating process, the performance of the plate after hydrogen separation is easy to be deteriorated, and the invention removes hydrogen through the first vacuum heat treatment, thereby improving the performance of the titanium alloy.
After the hydrogen-removing titanium alloy semi-finished coiled material is obtained, the hydrogen-removing titanium alloy semi-finished coiled material is subjected to pretreatment and second vacuum heat treatment in sequence to obtain the titanium alloy semi-finished foil. In the present invention, the atmosphere of the pretreatment is the atmosphere, and the pretreatment is preferably performed in a continuous atmospheric annealing furnace. In the invention, the temperature of the pretreatment is preferably 600-700 ℃, and more preferably 650 ℃; the heat preservation time is preferably 20-40 min, and more preferably 30 min; the temperature of the second vacuum heat treatment is preferably 850-900 ℃, and more preferably 880 ℃; the heat preservation time is preferably 2-4 h, and more preferably 3 h.
According to the invention, the coiled material is subjected to atmospheric annealing before the second vacuum heat treatment, so that an oxide film appears on the surface of the foil, and the adhesion of the foil during the second vacuum heat treatment can be avoided. According to the invention, after the pretreatment, the second vacuum heat treatment is carried out, so that the diffusion reaction can be carried out among the three-layer materials of Ti, Ni and Cr to form the TiNi60-Cr alloy.
After the titanium alloy semi-finished foil is obtained, the invention carries out heat treatment on the titanium alloy semi-finished foil to obtain the high-hardness titanium alloy foil. In the invention, the temperature of the heat treatment is preferably 400-450 ℃, and more preferably 420-430 ℃; the heat preservation time is preferably 2-6 h, and more preferably 3-5 h. In the present invention, the atmosphere of the heat treatment is preferably vacuum. The invention can precipitate the phase which is beneficial to improving the hardness of the alloy by carrying out heat treatment.
In the invention, the thickness of the high-hardness titanium alloy foil is preferably not more than 0.1mm, and more preferably 0.09-0.1 mm. In the invention, the high-hardness titanium alloy foil comprises the following chemical components in percentage by mass: ni 60%, Cr 5-10%, and the balance titanium.
In the present invention, the hardness of the high-hardness titanium alloy foil is preferably HRC62 to HRC 65.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Step one, selecting 10 sheets of TA1 foil with the thickness of 0.05mm multiplied by 300mm multiplied by 800 mm;
step two, degreasing the surfaces of the 10 TA1 foils selected in the step one;
step three, electroplating nickel on the surface of the 10 sheets of TA1 foil obtained in the step two, wherein the thickness of the electroplated nickel layer is 0.041mm, and the mass percent of Ni is 60%;
step four, after the 10 sheets of semi-finished foil obtained in the step three are cleaned by deionized water, electroplating chromium on the surface of the foil, wherein the thickness of the electroplated chromium layer is 0.009mm, and the mass percent of the Cr is 9%;
step five: performing vacuum heat treatment on the 10 semi-finished foils obtained in the fourth step, wherein the temperature of the vacuum heat treatment is 650 ℃, the heat preservation time is 2 hours, and cooling the foils to room temperature along with a furnace;
step six, aligning and stacking the 10 semi-finished foils obtained in the step five along the thickness direction, placing the foils in an alumina ceramic mould, carrying out vacuum hot-pressing sintering at the temperature of 940 ℃, the sintering pressure of 10MPa and the heat preservation time of 3h, and naturally cooling the foils to room temperature along with a furnace;
step seven: and (5) preserving the heat of the semi-finished plate obtained in the sixth step for 4 hours under the vacuum heating condition of 420 ℃ to obtain 1 high-hardness titanium alloy thin plate with the thickness of 1.0mm, wherein the hardness of the titanium alloy thin plate is HRC 65.
Example 2
Step one, selecting 3 sheets of TA2 foil with the thickness of 0.1mm multiplied by 300mm multiplied by 700 mm;
step two, removing oil on the surfaces of the 3 TA2 foils selected in the step one;
step three, electroplating nickel on the surface of the 3 sheets of TA2 foil obtained in the step two, wherein the thickness of the electroplated nickel layer is 0.09mm, and the mass percent of Ni is 60%;
step four, cleaning the 3 sheets of semi-finished foil obtained in the step three by using deionized water, and then electroplating chromium on the surface of the foil, wherein the thickness of the electroplated chromium layer is 0.01mm, and the mass percent of the Cr is 5%;
step five: carrying out vacuum heat treatment on the 3 semi-finished foils obtained in the fourth step, wherein the temperature of the vacuum heat treatment is 600 ℃, the heat preservation time is 4 hours, and cooling to room temperature along with the furnace;
step six, aligning and stacking the 3 semi-finished foils obtained in the step five along the thickness direction, placing the foils in an alumina ceramic mould, carrying out vacuum hot-pressing sintering at 880 ℃, the sintering pressure of 15MPa and the heat preservation time of 5h, and naturally cooling the foils to room temperature along with a furnace;
step seven: and (5) preserving the heat of the semi-finished plate obtained in the sixth step for 3 hours under the vacuum heating condition of 450 ℃ to obtain 1 high-hardness titanium alloy thin plate with the thickness of 0.6mm, wherein the hardness of the titanium alloy thin plate is HRC 63.
Example 3
Step one, selecting 2 TA1 foils with the thickness of 0.07mm multiplied by 280mm multiplied by 600 mm;
step two, degreasing the surfaces of the 2 TA1 foils selected in the step one;
step three, electroplating nickel on the surface of the 2 sheets of TA1 foil obtained in the step two, wherein the thickness of the electroplated nickel layer is 0.07mm, and the mass percent of Ni is 60%;
step four, after the 2 semi-finished foils obtained in the step three are cleaned by deionized water, electroplating chromium on the surfaces of the foils, wherein the thickness of the electroplated chromium layer is 0.01mm, and the mass percent of the Cr is 8%;
step five: carrying out vacuum heat treatment on the 2 semi-finished foils obtained in the fourth step, wherein the temperature of the vacuum heat treatment is 700 ℃, the heat preservation time is 3 hours, and cooling to room temperature along with the furnace;
step six, aligning and stacking the 2 semi-finished foils obtained in the step five along the thickness direction, placing the foils in an alumina ceramic mould, carrying out vacuum hot-pressing sintering at 900 ℃, the sintering pressure of 13MPa and the heat preservation time of 2h, and naturally cooling the foils to room temperature along with a furnace;
step seven: and (5) preserving the heat of the semi-finished plate obtained in the sixth step for 4 hours under the vacuum heating condition of 400 ℃ to obtain 1 high-hardness titanium alloy thin plate with the thickness of 0.3mm, wherein the hardness of the titanium alloy thin plate is HRC 64.
Example 4
Step one, selecting 3 TA2 foils with the thickness of 0.06mm, 300mm and 600 mm;
step two, degreasing the surfaces of the 3 sheets of TA2 foils selected in the step one;
step three, electroplating nickel on the surface of the 3 sheets of TA2 foil obtained in the step two, wherein the thickness of the electroplated nickel layer is 0.07mm, and the mass percent of Ni is 60%;
step four, cleaning the 3 sheets of semi-finished foil obtained in the step three by using deionized water, and then electroplating chromium on the surface of the foil, wherein the thickness of the electroplated chromium layer is 0.013mm, and the mass percent of the Cr is 10%;
step five: carrying out vacuum heat treatment on the 3 semi-finished foils obtained in the fourth step, wherein the temperature of the vacuum heat treatment is 680 ℃, the heat preservation time is 4 hours, and cooling to room temperature along with the furnace;
step six, aligning and stacking the 3 semi-finished foils obtained in the step five along the thickness direction, placing the foils in an alumina ceramic mould, performing vacuum hot-pressing sintering at 930 ℃, the sintering pressure being 14MPa and the heat preservation time being 4h, and naturally cooling the foils to room temperature along with a furnace;
step seven: and (5) preserving the heat of the semi-finished plate obtained in the sixth step for 2 hours under the vacuum heating condition of 430 ℃ to obtain 1 high-hardness titanium alloy thin plate with the thickness of 0.429mm, wherein the hardness of the titanium alloy thin plate is HRC 64.
Example 5
Step one, selecting 3 sheets of TA1 foil with the thickness of 0.08mm multiplied by 300mm multiplied by 800 mm;
step two, degreasing the surfaces of the 3 sheets of TA1 foils selected in the step one;
step three, electroplating nickel on the surface of the 3 sheets of TA1 foil obtained in the step two, wherein the thickness of the electroplated nickel layer is 0.07mm, and the mass percent of Ni is 60%;
step four, cleaning the 3 sheets of semi-finished foil obtained in the step three by using deionized water, and then electroplating chromium on the surface of the foil, wherein the thickness of the electroplated chromium layer is 0.007mm, and the mass percent of the Cr is 5%;
step five: carrying out vacuum heat treatment on the 3 semi-finished foils obtained in the fourth step, wherein the temperature of the vacuum heat treatment is 680 ℃, the heat preservation time is 4 hours, and cooling to room temperature along with the furnace;
step six, aligning and stacking the 3 semi-finished foils obtained in the step five along the thickness direction, placing the foils in an alumina ceramic mould, carrying out vacuum hot-pressing sintering at the temperature of 920 ℃, wherein the sintering pressure is 13MPa, and the heat preservation time is 4 hours, and naturally cooling the foils to the room temperature along with a furnace;
step seven: and (5) preserving the heat of the semi-finished plate obtained in the sixth step for 2 hours under the vacuum heating condition of 400 ℃ to obtain 1 high-hardness titanium alloy thin plate with the thickness of 0.471mm, wherein the hardness of the titanium alloy thin plate is HRC 62.
Example 6
Step one, selecting 1 roll of TA1 coiled material of 0.04mm multiplied by 300mm multiplied by length (L) mm;
step two, degreasing the surface of the TA1 coiled material in the step one;
step three, electroplating nickel on the surface of the coiled material obtained in the step two, wherein the thickness of the electroplated nickel layer is 0.042mm, and the mass percent of Ni is 60%;
step four, cleaning the semi-finished coiled material obtained in the step three by using deionized water, and then electroplating chromium on the surface of the coiled material, wherein the thickness of the electroplated chromium layer is 0.008mm, and the mass percent of the Cr is 9%;
fifthly, carrying out vacuum heat treatment on the semi-finished coiled material obtained in the fourth step, wherein the temperature of the vacuum heat treatment is 600 ℃, the heat preservation time is 6 hours, and cooling the semi-finished coiled material to the room temperature along with the furnace;
step six: carrying out pretreatment on the semi-finished coiled material obtained in the fifth step in a continuous atmospheric annealing furnace at the heating temperature of 600 ℃ for 40min, then carrying out vacuum heat treatment on the pretreated coiled material at the temperature of 850 ℃ for 4h, and cooling the coiled material to room temperature along with the furnace;
step seven: and (5) preserving the heat of the semi-finished foil obtained in the sixth step for 6 hours under the vacuum heating condition of 400 ℃ to obtain a high-hardness titanium alloy foil with the thickness of 0.09mm, wherein the hardness of the titanium alloy foil is HRC 64.
Example 7
Step one, selecting 1 roll of 0.045mm multiplied by 260mm multiplied by Lmm TA2 coiled material;
step two, degreasing the surface of the TA2 coiled material in the step one;
step three, electroplating nickel on the surface of the coiled material obtained in the step two, wherein the thickness of the electroplated nickel layer is 0.04mm, and the mass percent of Ni is 60%;
step four, cleaning the semi-finished coiled material obtained in the step three by using deionized water, and then electroplating chromium on the surface of the coiled material, wherein the thickness of the electroplated chromium layer is 0.005mm, and the mass percent of the Cr is 6%;
fifthly, carrying out vacuum heat treatment on the semi-finished coiled material obtained in the fourth step, wherein the temperature of the vacuum heat treatment is 650 ℃, the heat preservation time is 5 hours, and cooling the semi-finished coiled material to room temperature along with the furnace;
step six: performing pretreatment on the semi-finished coiled material obtained in the fifth step in a continuous atmospheric annealing furnace at the heating temperature of 650 ℃ for 30min, performing vacuum heat treatment on the pretreated coiled material at the temperature of 880 ℃ for 3h, and cooling the coiled material to room temperature along with the furnace;
step seven: and (5) preserving the heat of the semi-finished product foil obtained in the sixth step for 5 hours under the vacuum heating condition of 450 ℃ to obtain a high-hardness titanium alloy foil with the thickness of 0.09mm, wherein the hardness of the titanium alloy foil is HRC 62.
Example 8
Step one, selecting 1 roll of TA1 coiled material with the diameter of 0.05mm multiplied by 280mm multiplied by Lmm;
step two, degreasing the surface of the TA1 coiled material in the step one;
step three, electroplating nickel on the surface of the coiled material obtained in the step two, wherein the thickness of the electroplated nickel layer is 0.045mm, and the mass percent of Ni is 60%;
step four, cleaning the semi-finished coiled material obtained in the step three by using deionized water, and then electroplating chromium on the surface of the coiled material, wherein the thickness of the electroplated chromium layer is 0.005mm, and the mass percent of the Cr is 5%;
fifthly, carrying out vacuum heat treatment on the semi-finished coiled material obtained in the fourth step, wherein the temperature of the vacuum heat treatment is 700 ℃, the heat preservation time is 5 hours, and cooling the semi-finished coiled material to room temperature along with the furnace;
step six: carrying out pretreatment on the semi-finished coiled material obtained in the fifth step in a continuous atmospheric annealing furnace at the heating temperature of 700 ℃ for 20min, then carrying out vacuum heat treatment on the pretreated coiled material at the temperature of 900 ℃ for 2h, and cooling the coiled material to room temperature along with the furnace;
step seven: and (5) preserving the heat of the semi-finished foil obtained in the sixth step for 5 hours under the vacuum heating condition of 420 ℃ to obtain a high-hardness titanium alloy foil with the thickness of 0.1mm, wherein the hardness of the titanium alloy foil is HRC 65.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A preparation method of a high-hardness titanium alloy sheet and foil comprises the following steps:
sequentially electroplating nickel and chromium on the surface of the titanium foil to obtain a titanium alloy semi-finished foil;
carrying out vacuum heat treatment on the titanium alloy semi-finished product foil to obtain a dehydrogenated titanium alloy semi-finished product foil;
aligning and stacking at least two dehydrogenation titanium alloy semi-finished foils along the thickness direction, and performing vacuum hot-pressing sintering to obtain a titanium alloy semi-finished plate;
carrying out heat treatment on the titanium alloy semi-finished plate to obtain a high-hardness titanium alloy thin plate;
the preparation method of the high-hardness titanium alloy foil comprises the following steps:
sequentially electroplating nickel and chromium on the surface of the titanium coiled material to obtain a titanium alloy semi-finished coiled material;
carrying out first vacuum heat treatment on the titanium alloy semi-finished product coiled material to obtain a dehydrogenated titanium alloy semi-finished product coiled material;
sequentially carrying out pretreatment and second vacuum heat treatment on the hydrogen-removed titanium alloy semi-finished product coiled material to obtain a titanium alloy semi-finished product foil; the pre-treatment atmosphere is atmospheric air;
and carrying out heat treatment on the titanium alloy semi-finished foil to obtain the high-hardness titanium alloy foil.
2. The preparation method according to claim 1, wherein the thicknesses of the titanium foil and the titanium coiled material are independently 0.04-0.1 mm; the titanium foil and the titanium coiled material are independently TA1 or TA 2.
3. The production method according to claim 1, wherein the content of nickel element in the titanium alloy semi-finished foil and the titanium alloy semi-finished coil is 60 wt%; the content of chromium in the titanium alloy semi-finished product foil and the titanium alloy semi-finished product coiled material is independently 5-10 wt%.
4. The preparation method according to claim 1, wherein the temperature of the vacuum heat treatment is 600-700 ℃ and the holding time is 2-6 h.
5. The preparation method of claim 1, wherein the temperature of the vacuum hot-pressing sintering is 880-940 ℃, the sintering pressure is 10-15 MPa, and the heat preservation time is 2-5 h.
6. The preparation method according to claim 1, wherein the temperature of the first vacuum heat treatment is 600-700 ℃ and the holding time is 2-6 h.
7. The preparation method according to claim 1, wherein the temperature of the pretreatment is 600-700 ℃, and the holding time is 20-40 min;
the temperature of the second vacuum heat treatment is 850-900 ℃, and the heat preservation time is 2-4 h.
8. The preparation method according to claim 1, wherein the heat treatment temperature is 400-450 ℃ and the holding time is 2-6 h.
9. The method according to claim 1, wherein the high-hardness titanium alloy sheet has a thickness of 0.3 to 1.0 mm.
10. The method of claim 1, wherein the high-hardness titanium alloy foil has a thickness of less than 0.1 mm.
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