CN117026120A - Ultrathin titanium alloy TA4 strip performance modulation process for electronic product - Google Patents
Ultrathin titanium alloy TA4 strip performance modulation process for electronic product Download PDFInfo
- Publication number
- CN117026120A CN117026120A CN202310895913.3A CN202310895913A CN117026120A CN 117026120 A CN117026120 A CN 117026120A CN 202310895913 A CN202310895913 A CN 202310895913A CN 117026120 A CN117026120 A CN 117026120A
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- Prior art keywords
- annealing
- furnace
- cooling section
- equal
- titanium alloy
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 15
- 238000000137 annealing Methods 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 claims abstract description 24
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052786 argon Inorganic materials 0.000 claims abstract description 10
- 238000010583 slow cooling Methods 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 30
- 238000005496 tempering Methods 0.000 abstract description 12
- 238000005097 cold rolling Methods 0.000 abstract description 9
- 238000005096 rolling process Methods 0.000 abstract description 7
- 238000010791 quenching Methods 0.000 abstract description 6
- 230000000171 quenching effect Effects 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000005485 electric heating Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000956 alloy Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
The mechanical property and the surface flatness of the titanium alloy TA4 thin plate applied in the electronic industry have high requirements. Because the titanium alloy TA4 has high strength, the material of the strip is seriously hardened in the cold rolling process, and after the rolling deformation reaches about 45-50%, the yield strength is not less than 750MPa, the strip cannot be directly used, and the material must be subjected to modulation treatment. The method comprises the following steps: and quenching and tempering annealing is performed by adopting a full-continuous annealing furnace, wherein the annealing furnace is a furnace type electric heating annealing furnace, and the annealing furnace is divided into a heating section and a cooling section. Wherein, the cooling section is divided into a slow cooling section and a fast cooling section. The cooling rate of the slow cooling section is less than or equal to 25 ℃/S, and the cooling rate of the fast cooling section is more than or equal to 40 ℃/S. Annealing temperature of the annealing furnace is 580 ℃, and the furnace is used for quenching and tempering annealingThe inside is protected by high-purity argon, the purity of the argon is 99.999 percent, the pressure of the argon in the furnace is about 1500Pa, and the TV value=2.4 is produced. When in modulating annealing, the unit tension of the annealing furnace process section material is 50N/mm 2 . The annealed titanium alloy TA4 can meet the requirement that the grain size is more than or equal to 8 grades and the flatness is less than or equal to 0.5 mm/m.
Description
Technical Field
The manufacturing process and the manufacturing quality in the metallurgical industry.
Background
State of the art: in the manufacture of thin strips in the metallurgical industry, the material conditioning process is one of the key processes affecting the quality of the manufacture. Traditionally, quenching and tempering of metals are one form of material modulation. Because titanium alloy is of a large variety, the material characteristics of different brands are greatly different, and even if the components are relatively close, the heat treatment process is different. .
Problems of the prior art: the TA4 thin strip is mainly used for electronic products, such as a 0.15mm thick plate, and is applied to a touch screen backboard on an intelligent folding screen mobile phone. The touch screen backboard has high requirements on mechanical properties, surfaces and flatness of TA4 sheet materials. Such as: the surface and the plate shape of the strip are good, no scratch, convex points and pits exist, the unevenness is less than or equal to 0.5 mm/m, the tensile strength is less than or equal to 700MPa, the yield strength is less than or equal to 650MPa, and the hardness (0.5) is less than or equal to 270HV. However, the deformation of the TA4 high-strength titanium alloy strip is large in the cold rolling process, the cold work hardening of the material is serious, the tensile strength and the yield strength are improved to different degrees, and when the deformation of each rolling process reaches about 45-50%, the yield strength is not less than 750Mpa. As the titanium alloy is hardened and plastic in the cold rolling process, the grain size is extended in the longitudinal direction of the material under the action of large tension and rolling force, and the grains are lengthened. If the cold rolling deformation exceeds a certain limit, the material breaks under tension. On the other hand, the thickness difference (thickness difference of the edge, middle and side) of the strip in the width direction generated by the TA4 material during hot rolling is eliminated during cold rolling, so that the thickness of the material is uniform and uniform, the thickness of the material is convenient to use, the rolling of a thick place is more likely to be carried out during cold rolling, the rolling of a thin place is less, namely the deformation amount of each place is different, in other words, the mechanical property of the TA4 material has a certain degree of non-uniformity in the width direction, and if the non-uniformity difference exceeds about 10%, the use of an electronic product cannot be satisfied. Internal stress generated by the above factors can deform the TA4 material, and the flatness is poor, so that the TA4 material cannot be used due to the influence of stamping and etching of the TA4 material in a later process, and therefore, the TA4 material needs to be modulated. In addition, because of the large number of titanium alloy materials, even if the material composition is slightly fine-tuned, the mechanical properties and rolling characteristics of the titanium alloy materials are greatly changed, especially in the rolling process of ultrathin sheets. However, up to now, no published report has been made on how to apply the modulation treatment to the touch screen of the mobile phone by using the titanium alloy TA4 ultrathin plate.
Disclosure of Invention
The purpose of the invention is that: the preparation process of the titanium alloy TA4 ultrathin steel strip for the electronic product is provided.
The technical scheme for solving the problems is as follows: and quenching and tempering annealing is performed by adopting a full-continuous annealing furnace, wherein the annealing furnace is a general furnace type electric heating annealing furnace, the heating section of the annealing furnace is 10 meters long, the cooling section is 7 meters long, and the cooling section is divided into a slow cooling section and a fast cooling section. The cooling rate of the slow cooling section is less than or equal to 25 ℃/S, and the cooling rate of the fast cooling section is less than or equal to 40 ℃/S. Meets the grain size requirement (grain size is larger than or equal to 8 grade) of the annealing material. The annealing temperature of the annealing furnace is 580 ℃, high-purity argon is adopted for protection in the furnace during quenching and tempering annealing, the purity of the argon is 99.999%, and the pressure in the furnace is about 1500 Pa. When the modulation annealing is carried out under a certain production TV value, the tension of the annealing furnace process section material is required to be more than 40N/mm 2 . The TA4 thin strip of the titanium alloy is modulated through a continuous annealing furnace, the mechanical property of the TA4 material is effectively improved and balanced, the uniformity deviation of the tensile strength and the yield strength is about 1.5%, the grain size of the material is thinned, and the elongation is adjusted to about 8.5% from 5% after cold rolling. The mechanical properties of the TA4 ultrathin belt are as follows:
before tempering: the thickness of the strip material is 0.15 (mm); hardness (HV) 286; tensile strength (MPa) 285; yield strength (MPa) 785; elongation% 8.5
After tempering: the thickness of the strip material is 0.15 (mm); hardness (HV) 275; tensile strength (MPa) 715; yield strength (MPa) 653; elongation percentage 26.5
The technical effects are as follows: 1) The technical method for solving the cold rolling tempering treatment of the titanium alloy TA4 ultrathin plate is provided; 2) The ultrathin plate obtained by the quenching and tempering process has uniform metallographic structure, stable mechanical property and no warping of the plate shape; 3) The process method is reproducible, simple, economical, practical and reliable.
The specific embodiment is as follows: examples: modulated material: TA4, thickness is 0.15mm, and breadth is 600mm; modulation apparatus: full continuous annealing furnace, heat treatment parameters and conditions: the annealing temperature of the annealing furnace is 580 ℃, high-purity argon is adopted for protection in the furnace during the modulation annealing, the purity of the argon is 99.999%, the pressure in the furnace is about 1500Pa, and the TV value=2.4 is produced; the unit tension of the annealing furnace process section material is 50N/mm < 2 >. Tempering requirements are as follows: the surface and the plate shape of the strip are good, no scratch, convex points and pits exist, the unevenness is less than or equal to 0.5 mm/m, the tensile strength is less than or equal to 700MPa, the yield strength is less than or equal to 650MPa, and the hardness (0.5) is less than or equal to 270HV. The key point of modulation is as follows: the method is characterized in that a full continuous annealing furnace is adopted for modulating annealing, the annealing furnace is a general furnace type electric heating annealing furnace, the heating section of the annealing furnace is 10 meters long, the cooling section is 7 meters long, and the cooling section is divided into a slow cooling section and a fast cooling section. The cooling rate of the slow cooling section is less than or equal to 25 ℃/S, and the cooling rate of the fast cooling section is less than or equal to 40 ℃/S. The elongation percentage can be adjusted to about 8.5% from 5% after cold rolling. The mechanical properties of the material after the TA4 ultrathin belt is quenched and tempered are as follows:
before tempering: the thickness of the strip material is 0.15 (mm); hardness (HV) 286; tensile strength (MPa) 865; yield strength (MPa) 785; elongation% 8.5
After tempering: the thickness of the strip material is 0.15 (mm); hardness (HV) 275; tensile strength (MPa) 715; yield strength (MPa) 653; elongation% 26.5.
Claims (2)
1. A preparation process method of a titanium alloy TA4 ultrathin plate for electronic products.
2. During the preparation, the annealing temperature of the annealing furnace is 580 ℃, high-purity argon is adopted for protection in the furnace during the preparation annealing, the purity of the argon is 99.999%, and the pressure of the argon in the furnace is about 1500 Pa. Annealing is divided into a slow cooling section and a fast cooling section, wherein: the cooling rate of the slow cooling section is less than or equal to 25 ℃/S, the cooling rate of the fast cooling section is less than or equal to 40 ℃/S, namely the ratio of the cooling rate to the fast cooling section is more than or equal to 1:1.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310895913.3A CN117026120A (en) | 2023-07-20 | 2023-07-20 | Ultrathin titanium alloy TA4 strip performance modulation process for electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310895913.3A CN117026120A (en) | 2023-07-20 | 2023-07-20 | Ultrathin titanium alloy TA4 strip performance modulation process for electronic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117026120A true CN117026120A (en) | 2023-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310895913.3A Pending CN117026120A (en) | 2023-07-20 | 2023-07-20 | Ultrathin titanium alloy TA4 strip performance modulation process for electronic product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117026120A (en) |
-
2023
- 2023-07-20 CN CN202310895913.3A patent/CN117026120A/en active Pending
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