CN112916617A - Annealing-free recrystallization hot rolling process of TA1 titanium plate and TA1 titanium plate - Google Patents
Annealing-free recrystallization hot rolling process of TA1 titanium plate and TA1 titanium plate Download PDFInfo
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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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B1/30—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 plates, strips, bands or sheets of indefinite length in a non-continuous process
- B21B1/32—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
- B21B1/34—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
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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
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C14/00—Alloys based on titanium
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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Abstract
The invention discloses an annealing-free recrystallization hot rolling process of a TA1 titanium plate and a TA1 titanium plate, belongs to the technical field of material heat treatment processes, and aims to solve the problems that in the prior art, a structure is not completely recrystallized after rolling and the hardness is reduced after annealing recrystallization treatment. The hot rolling process comprises the following steps: preheating a TA1 casting blank at 980-1050 ℃; carrying out hot rolling on the preheated TA1 casting blank, wherein the initial rolling temperature is 950-980 ℃, and the final rolling temperature is above 850 ℃ to obtain a TA1 titanium plate; the TA1 titanium plate was not subjected to the recrystallization annealing process. The annealing-free recrystallization hot rolling process of the TA1 titanium plate and the TA1 titanium plate can be used for titanium material structural parts.
Description
Technical Field
The invention belongs to the technical field of material heat treatment processes, and particularly relates to an annealing-free recrystallization hot rolling process of a TA1 titanium plate and a TA1 titanium plate.
Background
The existing hot rolling process of the TA1 titanium plate is as follows: the blank heating temperature is 830-930 ℃, the initial rolling temperature is 780-900 ℃, the final rolling temperature is 600-750 ℃, the blank is coiled into a coil after hot rolling, the coil is coiled and cooled, and then a sample is taken for hardness test, the hardness is 230-250 HV0.01, and the structure is still mainly an unrecrystallized microstructure, as shown in figure 1.
In the hot rolling production process, since the initial rolling temperature is low, sufficient dynamic recrystallization and static recrystallization cannot be achieved during the rolling process, and the titanium sheet after hot rolling has a large amount of unrecrystallized fibrous texture, it is necessary to perform sufficient annealing recrystallization treatment after hot rolling.
Generally, the annealing recrystallization treatment is as follows: and (3) keeping the temperature of the hot-rolled titanium plate at 620-720 ℃ for 5-10 h to obtain an annealing recrystallization structure, and performing a hardness test on the annealed titanium plate to obtain the hardness of 170-190 HV0.01, referring to fig. 2. It is seen that the hardness of the hot-rolled titanium sheet is significantly reduced by annealing and recrystallization.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide an annealing-free recrystallization hot rolling process for TA1 titanium sheet and TA1 titanium sheet, so as to solve the problems of incomplete recrystallization of the structure after rolling and hardness reduction after annealing recrystallization treatment in the prior art.
The purpose of the invention is mainly realized by the following technical scheme:
the invention provides an annealing-free recrystallization hot rolling process of a TA1 titanium plate, which comprises the following steps:
preheating a TA1 casting blank at 980-1050 ℃;
carrying out hot rolling on the preheated TA1 casting blank, wherein the initial rolling temperature is 950-980 ℃, and the final rolling temperature is above 850 ℃ to obtain a TA1 titanium plate;
the TA1 titanium plate was not subjected to the recrystallization annealing process.
Further, the preheating temperature is 1000 to 1050 ℃ (e.g., 1000 ℃, 1010 ℃, 1020 ℃, 1030 ℃, 1040 ℃ or 1050 ℃), the initial rolling temperature is 960 to 980 ℃ (e.g., 960 ℃, 965 ℃, 968 ℃, 972 ℃, 977 ℃ or 980 ℃), and the final rolling temperature is 900 to 950 ℃ (e.g., 900 ℃, 910 ℃, 918 ℃, 929 ℃, 944 ℃ or 950 ℃).
Further, the number of passes of hot rolling is 4 to 8 (for example, 5 passes).
Further, the reduction rate of each pass of the hot rolling is 5-60%.
Further, the pressing rate of the last pass is controlled to be 5-35%.
Further, from front to back, the reduction rate of each pass is gradually reduced except for the last pass.
Furthermore, the pressing rate of the first pass is 1.5-3 times of that of the second pass.
Furthermore, in the annealing-free recrystallization hot rolling process of the TA1 titanium plate, the hot rolling passes are 4 passes, namely a first pass, a second pass, a third pass, a fourth pass and a fifth pass, the reduction rate of the first pass is 45-52%, the reduction rate of the second pass is 25-28%, the reduction rate of the third pass is 18-22%, and the reduction rate of the fourth pass is 30-35%.
Or in the annealing-free recrystallization hot rolling process of the TA1 titanium plate, the hot rolling passes are 5 passes, namely a first pass, a second pass, a third pass, a fourth pass and a fifth pass, the reduction rate of the first pass is 45-52%, the reduction rate of the second pass is 25-28%, the reduction rate of the third pass is 18-22%, the reduction rate of the fourth pass is 14-16% and the reduction rate of the fifth pass is 15-18%.
Or in the annealing-free recrystallization hot rolling process of the TA1 titanium plate, the hot rolling passes are 6 passes, namely a first pass, a second pass, a third pass, a fourth pass, a fifth pass and a sixth pass, the reduction rate of the first pass is 45-52%, the reduction rate of the second pass is 25-28%, the reduction rate of the third pass is 18-22%, the reduction rate of the fourth pass is 14-16%, the reduction rate of the fifth pass is 12-13%, and the reduction rate of the sixth pass is 6-10%.
The invention also provides an annealing recrystallization-free TA1 titanium plate which is prepared by adopting the annealing recrystallization-free hot rolling process of the TA1 titanium plate.
Further, the chemical compositions of the annealing-free recrystallization TA1 titanium plate comprise the following components in percentage by mass: fe 0.016-0.063, C0.0072-0.0074, H0.0010-0.0015, N0.05-0.18, O0.04-0.05 and Ti in balance.
Furthermore, the thickness of the TA1 titanium plate free of annealing recrystallization is 9-11 mm.
Furthermore, the TA1 titanium plate free of annealing recrystallization has hardness of 230-250 HV 0.01.
Further, the TA1 titanium plate free of annealing recrystallization has a yield strength of 360 to 450MPa (e.g., 360MPa, 385MPa, 408MPa, 435MPa, or 450MPa), a tensile strength of 500 to 550MPa (e.g., 500MPa, 512MPa, 530MPa, 545MPa, or 550MPa), and an elongation of 9.0 to 9.8% (e.g., 9.0%, 9.2%, 9.5%, 9.7%, or 9.8%).
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
a) the annealing-free recrystallization hot rolling process for the TA1 titanium plate provided by the invention greatly improves the preheating temperature, the initial rolling temperature and the final rolling temperature of a TA1 casting blank, the annealing-free recrystallization hot rolling process for the TA1 titanium plate provided by the invention is adopted to carry out hot rolling on the TA1 titanium plate, complete recrystallization of the TA1 titanium plate can be basically ensured in the hot rolling process, and the hot-rolled TA1 titanium plate does not need to be annealed and recrystallized, so that the industrial production efficiency of the TA1 titanium plate can be greatly improved. Meanwhile, in the annealing-free recrystallization hot rolling process, the initial rolling temperature and the final rolling temperature are both high, so that hot rolling passes can be effectively reduced, the hot rolling efficiency is improved, and the hot rolling process flow is shortened.
b) The TA1 titanium plate prepared by the annealing-free recrystallization hot rolling process of the TA1 titanium plate provided by the invention is not subjected to annealing recrystallization treatment any more, and the hardness of the TA1 titanium plate is not influenced, so that the hardness of the preheating-free hot-rolled TA1 titanium plate prepared by the annealing-free recrystallization hot rolling process and the hardness of the hot-rolled TA1 titanium plate obtained by the conventional annealing-free recrystallization hot rolling process can be kept at the same level.
c) According to the annealing-free recrystallization hot rolling process for the TA1 titanium plate, when the hot rolling temperature (preheating temperature, initial rolling temperature and final rolling temperature) is low, higher reduction rate of each pass of hot rolling is needed to promote recrystallization nucleation, the recrystallization nucleation driving force is deformation energy storage, the recrystallization nucleation difficulty is increased along with the gradual reduction of the temperature, but the recrystallization driving force can be increased by increasing the reduction rate of each pass of hot rolling and increasing the deformation energy storage, and the recrystallization nucleation can be promoted. According to the annealing-free recrystallization hot rolling process for the TA1 titanium plate, the reduction rate of each pass of hot rolling is properly adjusted on the basis of effectively increasing the hot rolling temperature (preheating temperature, initial rolling temperature and final rolling temperature), so that the annealing-free recrystallization of the TA1 titanium plate can be further promoted.
d) According to the annealing-free recrystallization hot rolling process for the TA1 titanium plate, the pressing rate of the last pass is too low, so that the annealing-free recrystallization of the TA1 titanium plate is not facilitated, the pressing rate of the last pass is too high, the influence on the recrystallization rate of the annealing-free recrystallization of the TA1 titanium plate is not large, the hot rolling cost is increased, and the industrial production is not facilitated. According to the annealing-free recrystallization hot rolling process of the TA1 titanium plate, the reduction rate of each pass is reduced, the rolling deformation speed can be reduced, and the recrystallization proportion of the TA1 titanium plate is favorably improved.
e) According to the annealing-free recrystallization hot rolling process for the TA1 titanium plate, provided by the invention, the microstructure of the TA1 titanium plate casting blank can be effectively damaged at the initial stage of hot rolling through the large-proportion reduction rate of the first pass, so that the later recrystallization is more favorably realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating the particular invention and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the figures.
FIG. 1 is a metallographic structure diagram of a TA1 titanium plate before annealing by using a conventional hot rolling process;
FIG. 2 is a metallographic structure diagram of a TA1 titanium plate after annealing by a conventional hot rolling process;
FIG. 3a is a metallographic structure diagram of a TA1 titanium plate free of annealing recrystallization provided in example 1 of the present invention;
FIG. 3b is a metallographic structure diagram of a TA1 titanium plate free of annealing recrystallization provided in example 2 of the present invention;
fig. 3c is a metallographic structure diagram of a TA1 titanium plate free of annealing recrystallization provided in example 3 of the present invention.
Detailed Description
The preferred invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the description serve to explain the principles of the invention.
The invention provides an annealing-free recrystallization hot rolling process of a TA1 titanium plate, which comprises the following steps:
preheating a TA1 casting blank at 980-1050 ℃;
carrying out hot rolling on the preheated TA1 casting blank, wherein the initial rolling temperature is 950-980 ℃, and the final rolling temperature is above 850 ℃ to obtain a TA1 titanium plate;
the TA1 titanium plate was not subjected to the recrystallization annealing process.
Compared with the prior art, the annealing-free recrystallization hot rolling process for the TA1 titanium plate provided by the invention greatly improves the preheating temperature, the initial rolling temperature and the final rolling temperature of a TA1 casting blank, the annealing-free recrystallization hot rolling process for the TA1 titanium plate provided by the invention is adopted to carry out hot rolling on the TA1 titanium plate, in the hot rolling process, the TA1 titanium plate can be basically ensured to be completely recrystallized, and the hot-rolled TA1 titanium plate does not need to be annealed and recrystallized, so that the industrial production efficiency of the TA1 titanium plate can be greatly improved. Meanwhile, in the annealing-free recrystallization hot rolling process, the initial rolling temperature and the final rolling temperature are both high, so that hot rolling passes can be effectively reduced, the hot rolling efficiency is improved, and the hot rolling process flow is shortened.
In addition, the TA1 titanium plate prepared by the annealing-free recrystallization hot rolling process of the TA1 titanium plate is not subjected to annealing recrystallization treatment any more, so that the hardness of the TA1 titanium plate is not influenced, and the hardness of the preheating-free hot-rolled TA1 titanium plate prepared by the annealing-free recrystallization hot rolling process and the hardness of the hot-rolled TA1 titanium plate prepared by the conventional annealing-free recrystallization hot rolling process can be kept at the same level.
In order to further improve the recrystallization rate of the TA1 titanium plate obtained by the annealing-free recrystallization hot rolling process of the TA1 titanium plate provided by the invention, the preheating temperature is 1000-1050 ℃ (for example, 1000 ℃, 1010 ℃, 1020 ℃, 1030 ℃, 1040 ℃ or 1050 ℃), the initial rolling temperature is 960-980 ℃ (for example, 960 ℃, 965 ℃, 968 ℃, 972 ℃, 977 ℃ or 980 ℃), and the final rolling temperature is 900-950 ℃ (for example, 900 ℃, 910 ℃, 918 ℃, 929 ℃, 944 ℃ or 950 ℃).
It is understood that, in order to refine the microstructure of the TA1 titanium plate, the hot rolling is multi-pass hot rolling, exemplarily, the number of passes of the hot rolling is 4 to 8 (for example, 5 passes), and the microstructure refinement of the TA1 titanium plate can be promoted by the multi-pass hot rolling.
Considering that the increase of the preheating temperature, the initial rolling temperature and the final rolling temperature is beneficial to the improvement of the reduction rate of the hot rolling, particularly, the reduction rate of each pass of the hot rolling can be controlled to be 5-60%. In the research of the invention, it is found that when the hot rolling temperature (preheating temperature, initial rolling temperature and final rolling temperature) is lower, higher reduction rate of each pass of hot rolling is needed to promote recrystallization nucleation, the recrystallization nucleation driving force is deformation energy storage, the difficulty of recrystallization nucleation is increased along with the gradual reduction of the temperature, but the recrystallization driving force can be increased by increasing the reduction rate of each pass of hot rolling and increasing the deformation energy storage, and the recrystallization nucleation can be promoted. According to the annealing-free recrystallization hot rolling process for the TA1 titanium plate, the reduction rate of each pass of hot rolling is properly adjusted on the basis of effectively increasing the hot rolling temperature (preheating temperature, initial rolling temperature and final rolling temperature), so that the annealing-free recrystallization of the TA1 titanium plate can be further promoted.
Regarding the adjustment of the reduction ratio of each pass, the reduction ratio of the last pass in the hot rolling process is controlled to be 5-35% in consideration of the fact that the reduction ratio of the last pass in the hot rolling process has a large influence on the annealing-free recrystallization of the TA1 titanium plate. This is because too small a reduction ratio in the last pass is not favorable for annealing-free recrystallization of the TA1 titanium sheet, and too large a reduction ratio in the last pass is not favorable for recrystallization of the TA1 titanium sheet, and this causes a rise in hot rolling cost, which is not favorable for industrial production. According to the annealing-free recrystallization hot rolling process of the TA1 titanium plate, the reduction rate of each pass is reduced, the rolling deformation speed can be reduced, and the recrystallization proportion of the TA1 titanium plate is favorably improved.
It is noted that, in addition to the last pass of hot rolling, other passes have some effect on the recrystallization rate of TA1 without annealing recrystallization, specifically, the rolling reduction rate of each pass is gradually reduced from front to back except the last pass. By adjusting the reduction ratios in the other passes except the last pass of the hot rolling in this manner, the annealing-free recrystallization of the TA1 titanium sheet can be further promoted.
In order to effectively destroy the microstructure of the TA1 titanium plate casting blank in the initial stage of hot rolling and facilitate later recrystallization, the reduction rate of the first pass is 1.5-3 times of the reduction rate of the second pass. The microstructure of the TA1 titanium plate casting blank can be effectively destroyed in the early stage of hot rolling through the large-proportion reduction rate of the first pass, so that the later recrystallization is more facilitated.
Illustratively, in the annealing-free recrystallization hot rolling process of the TA1 titanium plate, the hot rolling passes are 4 passes, namely a first pass, a second pass, a third pass, a fourth pass and a fifth pass, the reduction rate of the first pass is 45-52%, the reduction rate of the second pass is 25-28%, the reduction rate of the third pass is 18-22%, and the reduction rate of the fourth pass is 30-35%.
Or in the annealing-free recrystallization hot rolling process of the TA1 titanium plate, the hot rolling passes are 5 passes, namely a first pass, a second pass, a third pass, a fourth pass and a fifth pass, the reduction rate of the first pass is 45-52%, the reduction rate of the second pass is 25-28%, the reduction rate of the third pass is 18-22%, the reduction rate of the fourth pass is 14-16% and the reduction rate of the fifth pass is 15-18%.
Or in the annealing-free recrystallization hot rolling process of the TA1 titanium plate, the hot rolling passes are 6, namely a first pass, a second pass, a third pass, a fourth pass, a fifth pass and a sixth pass, the reduction rate of the first pass is 45-52%, the reduction rate of the second pass is 25-28%, the reduction rate of the third pass is 18-22%, the reduction rate of the fourth pass is 14-16%, the reduction rate of the fifth pass is 12-13% and the reduction rate of the sixth pass is 6-10%.
The invention also provides an annealing recrystallization-free TA1 titanium plate which is prepared by adopting the annealing recrystallization-free hot rolling process of the TA1 titanium plate.
Compared with the prior art, the beneficial effects of the annealing-recrystallization-free TA1 titanium plate provided by the invention are basically the same as those of the annealing-recrystallization-free hot rolling process of the TA1 titanium plate, and are not repeated herein.
In view of the chemical composition of the TA1 titanium plate free of annealing recrystallization, the hot rolling temperature (preheating temperature, starting rolling temperature, and finishing rolling temperature), the hot rolling pass, and the hot rolling reduction, the chemical composition of the TA1 titanium plate free of annealing recrystallization includes, in mass percent: fe 0.016-0.063, C0.0072-0.0074, H0.0010-0.0015, N0.05-0.18, O0.04-0.05 and Ti in balance.
Illustratively, the thickness of the TA1 titanium plate free of annealing recrystallization is 9-11 mm.
It can be understood that the hardness of the annealing-free recrystallization TA1 titanium plate prepared by the annealing-free recrystallization hot rolling process of the TA1 titanium plate is 230-250 HV 0.01.
In addition, the mechanical strength of the annealing-free recrystallization-free TA1 titanium plate can be effectively improved by adopting the annealing-free recrystallization hot rolling process of the TA1 titanium plate, and tests show that the yield strength of the annealing-free recrystallization-free TA1 titanium plate is 360-450 MPa (for example, 360MPa, 385MPa, 408MPa, 435MPa or 450MPa), the tensile strength is 500-550 MPa (for example, 500MPa, 512MPa, 530MPa, 545MPa or 550MPa), and the elongation is 9.0-9.8% (for example, 9.0%, 9.2%, 9.5%, 9.7% or 9.8%).
Example 1
The embodiment provides a TA1 titanium plate and an annealing-free recrystallization hot rolling process thereof, wherein the TA1 titanium plate comprises the following chemical components in percentage by mass: fe 0.02, C0.0072, H0.0012, N0.06 and O0.04, and the balance Ti.
The annealing-free recrystallization hot rolling process of the TA1 titanium plate comprises the following steps:
step 1: preheating a TA1 casting blank at 980 ℃;
step 2: and (3) carrying out hot rolling on the preheated TA1 casting blank, wherein the initial rolling temperature is 950 ℃, the final rolling temperature is 850 ℃, the hot rolling passes are 6, the rolling reduction of each pass is 24-16-14-12-10-9 mm, the rolling reduction of the last pass is 7.1%, so that a TA1 titanium plate is obtained, the TA1 titanium plate is not subjected to recrystallization annealing process, and the thickness of the prepared TA1 titanium plate is 9.29 mm.
The TA1 titanium plate of this example was tested for metallographic structure (see fig. 3a), hardness, yield strength, tensile strength and elongation.
The test results were as follows:
as can be seen from FIG. 3a, the TA1 titanium sheet provided in this example was substantially completely recrystallized. The hardness is 235HV0.01, the yield strength is 385MPa, the tensile strength is 545MPa, and the elongation is 9.2%.
Example 2
The embodiment provides a TA1 titanium plate and an annealing-free recrystallization hot rolling process thereof, wherein the TA1 titanium plate comprises the following chemical components in percentage by mass: fe 0.05, C0.0074, H0.0015, N0.010 and O0.05, and the balance Ti.
The annealing-free recrystallization hot rolling process of the TA1 titanium plate comprises the following steps:
step 1: preheating a TA1 casting blank at 1010 ℃;
step 2: and (3) carrying out hot rolling on the preheated TA1 casting blank, wherein the initial rolling temperature is 960 ℃, the final rolling temperature is 862 ℃, the number of hot rolling passes is 5, the reduction of each pass is 26-16-14-12-10 mm, the reduction rate of the last pass is 16.58%, so as to obtain the TA1 titanium plate, the TA1 titanium plate is not subjected to recrystallization annealing process, and the thickness of the prepared TA1 titanium plate is 10.11 mm.
The TA1 titanium plate of this example was tested for metallographic structure (see fig. 3b), hardness, yield strength, tensile strength and elongation.
The test results were as follows:
as can be seen from FIG. 3b, the TA1 titanium sheet provided in this example was substantially completely recrystallized. The hardness is 250HV0.01, the yield strength is 435MPa, the tensile strength is 512MPa, and the elongation is 9.7%.
Example 3
The embodiment provides a TA1 titanium plate and an annealing-free recrystallization hot rolling process thereof, wherein the TA1 titanium plate comprises the following chemical components in percentage by mass: fe 0.06, C0.0074, H0.0012, N0.015 and O0.05, and the balance of Ti.
The annealing-free recrystallization hot rolling process of the TA1 titanium plate comprises the following steps:
step 1: preheating a TA1 casting blank at 1050 ℃;
step 2: and (3) carrying out hot rolling on the preheated TA1 casting blank, wherein the initial rolling temperature is 980 ℃, the final rolling temperature is 875 ℃, the hot rolling passes are 4, the rolling reduction of each pass is 24-16-14-9.17 mm, the rolling reduction of the last pass is 34.5%, so that a TA1 titanium plate is obtained, the TA1 titanium plate is not subjected to recrystallization annealing process, and the thickness of the prepared TA1 titanium plate is 9.29 mm.
The TA1 titanium plate of this example was tested for metallographic structure (see fig. 3c), hardness, yield strength, tensile strength and elongation.
The test results were as follows:
as can be seen from fig. 3c, the TA1 titanium sheet provided in this example was substantially completely recrystallized. The hardness is 240HV0.01, the yield strength is 408MPa, the tensile strength is 500MPa, and the elongation is 9.5%.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. An annealing-free recrystallization hot rolling process of a TA1 titanium plate is characterized by comprising the following steps:
preheating a TA1 casting blank at 980-1050 ℃;
carrying out hot rolling on the preheated TA1 casting blank, wherein the initial rolling temperature is 950-980 ℃, and the final rolling temperature is above 850 ℃ to obtain a TA1 titanium plate;
the TA1 titanium plate was not subjected to the recrystallization annealing process.
2. The annealing-free recrystallization hot rolling process of the TA1 titanium plate as claimed in claim 1, wherein the preheating temperature is 1000-1050 ℃, the initial rolling temperature is 960-980 ℃, and the final rolling temperature is 900-950 ℃.
3. The process of claim 1, wherein the hot rolling passes are 4-8 passes.
4. The process of claim 1, wherein the reduction rate per pass is 5-60%.
5. The annealing-free recrystallization hot rolling process of TA1 titanium plate as claimed in claim 4, wherein the reduction ratio of the last pass is controlled to be 7-58%.
6. The process of claim 4, wherein the reduction rate of each pass is gradually reduced from front to back except the last pass.
7. The process of claim 4, wherein the reduction ratio of the first pass is 1.5-3 times the reduction ratio of the second pass.
8. An annealing-free recrystallized TA1 titanium sheet, characterized in that it is obtained by an annealing-free recrystallization hot rolling process of TA1 titanium sheet as claimed in claims 1 to 7.
9. The annealing-free recrystallized TA1 titanium sheet according to claim 8, wherein the chemical composition comprises, in mass percent: fe 0.016-0.063, C0.0072-0.0074, H0.0010-0.0015, N0.05-0.18, O0.04-0.05 and Ti in balance.
10. The annealing-free recrystallized TA1 titanium sheet according to claim 8, wherein the hardness is 230-250 HV 0.01.
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| CN202110090476.9A Active CN112916617B (en) | 2021-01-22 | 2021-01-22 | Annealing-free recrystallization hot rolling process of TA1 titanium plate and TA1 titanium plate |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811135A (en) * | 2009-11-30 | 2010-08-25 | 莱芜钢铁股份有限公司 | Method for producing titanium strip by adopting conventional hot continuous rolling machine set |
| CN103599927A (en) * | 2013-11-26 | 2014-02-26 | 四川西南不锈钢有限责任公司 | Hot rolling titanium plate production method and system |
| CN105728459A (en) * | 2016-03-02 | 2016-07-06 | 湖南湘投金天钛金属有限公司 | Method for producing TA18 titanium alloy strip coil by means of conventional hot continuous rolling unit |
| CN106925612A (en) * | 2017-03-24 | 2017-07-07 | 西部钛业有限责任公司 | A kind of processing method of high dimensional accuracy TA15 titanium alloy wide medium-thick plates |
| CN111014288A (en) * | 2019-11-27 | 2020-04-17 | 西安庄信新材料科技有限公司 | Titanium plate rolling method |
| CN111940507A (en) * | 2020-07-02 | 2020-11-17 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Process for rolling thin and wide titanium plate in one fire |
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2021
- 2021-01-22 CN CN202110090476.9A patent/CN112916617B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811135A (en) * | 2009-11-30 | 2010-08-25 | 莱芜钢铁股份有限公司 | Method for producing titanium strip by adopting conventional hot continuous rolling machine set |
| CN103599927A (en) * | 2013-11-26 | 2014-02-26 | 四川西南不锈钢有限责任公司 | Hot rolling titanium plate production method and system |
| CN105728459A (en) * | 2016-03-02 | 2016-07-06 | 湖南湘投金天钛金属有限公司 | Method for producing TA18 titanium alloy strip coil by means of conventional hot continuous rolling unit |
| CN106925612A (en) * | 2017-03-24 | 2017-07-07 | 西部钛业有限责任公司 | A kind of processing method of high dimensional accuracy TA15 titanium alloy wide medium-thick plates |
| CN111014288A (en) * | 2019-11-27 | 2020-04-17 | 西安庄信新材料科技有限公司 | Titanium plate rolling method |
| CN111940507A (en) * | 2020-07-02 | 2020-11-17 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Process for rolling thin and wide titanium plate in one fire |
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