CN110643912A - Vibration heat treatment process method for hot-rolled aluminum alloy ring piece - Google Patents
Vibration heat treatment process method for hot-rolled aluminum alloy ring piece Download PDFInfo
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- CN110643912A CN110643912A CN201911042354.1A CN201911042354A CN110643912A CN 110643912 A CN110643912 A CN 110643912A CN 201911042354 A CN201911042354 A CN 201911042354A CN 110643912 A CN110643912 A CN 110643912A
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- ring piece
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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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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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
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
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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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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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
- C22F3/00—Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons
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- Crystallography & Structural Chemistry (AREA)
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a vibration heat treatment process method for a hot-rolled aluminum alloy ring piece, which mainly comprises the following steps: (a) after the aluminum alloy ring piece is subjected to hot rolling, the aluminum alloy ring piece is immediately taken down from a ring rolling mill, and the ring piece is directly and uniformly heated to a certain temperature under the condition that the ring piece has residual rolling temperature, and subjected to solution treatment; (b) selecting a proper quenching cooling speed for cooling the ring piece, and measuring the temperature of the ring piece taken out from the quenching medium by an infrared thermometer or controlling the temperature of the ring piece taken out from the quenching medium to be 170 +/-5 ℃ by practical experience, and immediately carrying out vibration aging treatment on the ring piece; (c) and uniformly heating the ring piece to a certain temperature, and carrying out aging treatment. The novel vibration heat treatment process of carrying out solution quenching, vibration treatment and aging treatment by using rolling residual temperature is energy-saving and environment-friendly, can effectively inhibit or eliminate the residual stress of the ring piece, and can obtain the aluminum alloy ring piece with high strength, high plasticity and high toughness.
Description
Technical Field
The patent relates to the technical field of ring rolling and heat treatment, in particular to a vibration heat treatment process method for a hot-rolled aluminum alloy ring.
Background
The rolling of the ring piece is also called ring rolling or reaming, and is a special plastic processing process that the diameter of the ring piece is continuously increased, the wall thickness is reduced and the section is gradually formed by utilizing a roller to drive the ring piece to rotate and continuously rolling and deforming a rolling pass. The ring rolling is classified according to temperature and can be divided into cold rolling and hot rolling, wherein the basic flow of the hot rolling process comprises smelting, steel ingot casting, steel ingot cogging, bar stock, sawing machine blanking, blank (heating) upsetting, punching, heating, hot ring rolling, forming (cooling), solid solution (heating), quenching, aging treatment (heating), machining, inspection and finished product forming.
In the above process operations, solution quenching and aging treatment are an important process in the heat treatment process after rolling the aluminum alloy ring piece, after the supersaturated solid solution is formed by quenching, the aluminum alloy ring piece is placed at room temperature or a slightly higher appropriate temperature for a longer time, and aging treatment is performed to improve the hardness, strength, electric property, magnetism and the like of the alloy.
In the current production process, after the ring piece is taken down after ring rolling is finished, the temperature of the ring piece is generally reduced to room temperature and then heated to the solid solution temperature again, so that a large amount of energy is inevitably wasted; moreover, the inside of the aged ring still has large residual stress, which affects the dimensional accuracy, the stress corrosion property of the ring, the fatigue property and the like. Therefore, an effective and energy-saving heat treatment process is urgently needed to inhibit or eliminate the residual stress of the ring piece and improve the service performance.
Disclosure of Invention
The invention aims to provide a vibration heat treatment process method for a hot-rolled aluminum alloy ring piece, and provides a novel vibration heat treatment process for carrying out solution quenching, vibration treatment and aging treatment by utilizing rolling residual temperature, aiming at the problems of high energy consumption and large residual stress in the finished ring piece in the existing rolling process.
In order to achieve the purpose, the invention adopts the following technical scheme:
(a) after the aluminum alloy ring piece is subjected to hot rolling, the aluminum alloy ring piece is immediately taken down from a ring rolling mill, and the ring piece is directly and uniformly heated to a certain temperature under the condition that the ring piece has residual rolling temperature, and subjected to solution treatment;
(b) selecting a proper quenching cooling speed for cooling the ring piece subjected to the solution treatment in the step (a), and controlling the temperature of the ring piece taken out from a quenching medium to be 170 +/-5 ℃ by measuring with an infrared thermometer or by practical experience, and immediately carrying out vibration aging treatment on the ring piece;
(c) and (c) uniformly heating the ring subjected to the vibration aging treatment in the step (b) to a certain temperature, and performing aging treatment.
In the above embodiment, the aluminum alloy in the step (a) is a heat-treatable strengthened aluminum alloy.
In the scheme, the proper quenching cooling speed in the step (b) is selected through empirical judgment or computer virtual simulation, and the cooling speed has to ensure that the ring piece has qualified metallographic structure and mechanical property when being cooled to 170 +/-5 ℃.
In the above scheme, the vibration aging treatment in the step (b) is specifically: the vibration aging treatment of integral structure resonance or local resonance can be selected according to the size of the ring piece and the distribution condition of internal residual stress, and the proper supporting mode, the proper clamping mode and position of the sensor, the proper clamping mode, the excitation position, the excitation direction, the excitation force, the excitation frequency and the excitation time of the ring piece, and the single excitation time of the same position is generally not more than 30 min.
In the above scheme, specific heat treatment parameters of the solution treatment in the step (a) and the aging treatment in the step (c) can be obtained by related experience or reference manual inquiry, and it is required to ensure that the ring does not crack, does not overheat and burn, and has uniform temperature in the whole heat treatment process.
Compared with the prior art, the invention has the following advantages and effects:
compared with the prior art, the invention provides a vibration heat treatment process method of a hot-rolled aluminum alloy ring piece, and provides a novel vibration heat treatment process for carrying out solution quenching, vibration treatment and aging treatment by utilizing rolling residual temperature aiming at the problems of more energy consumption and large residual stress in the finished ring piece in the existing rolling process, wherein (1) the rolling residual temperature is fully utilized, energy is saved, the environment is protected, and the cost is reduced; (2) the addition of vibratory aging between solution quenching and aging treatment can effectively and comprehensively utilize deformation strengthening and phase change strengthening, and a process method combining vibratory aging and heat treatment operation. The dislocation density of the material can be increased by vibration aging, the aging response speed of the alloy is improved, the high-density dislocations and solute atoms in the alloy interact to form solute atomic groups, the atomic groups are stable and low in energy, the mobility of the dislocations is reduced, and the 'pinning' effect of the atomic groups must be overcome by the dislocations, so that the residual stress of the ring can be effectively inhibited or eliminated, and the aluminum alloy ring with high strength, high plasticity and high toughness can be obtained.
Drawings
FIG. 1 is a route diagram of a hot-rolled aluminum alloy ring vibration heat treatment process.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. The technical features of the embodiments of the present invention may be combined with each other as long as they do not conflict with each other.
A vibration heat treatment process method for a hot-rolled aluminum alloy ring piece comprises the following steps (a process route diagram is shown in figure 1):
(a) after the 2219 aluminum alloy ring piece is subjected to hot rolling, the ring piece is immediately taken down from a ring rolling mill, and the ring piece is directly and uniformly heated to 535 ℃ under the condition that the ring piece has residual rolling temperature (320 ℃), and subjected to heat preservation for 6 hours;
among them, 2219 aluminum alloy is a heat-treatable strengthened aluminum alloy.
(b) Selecting a proper quenching cooling speed for cooling the ring piece after the solution treatment, measuring and controlling the temperature of the ring piece taken out from the quenching medium to be 170 +/-5 ℃ by an infrared thermometer, and immediately carrying out vibration aging treatment on the ring piece;
wherein, the proper quenching cooling speed (60 ℃ water is selected) is selected by experience, and the cooling speed can ensure that the ring piece has qualified metallographic structure and mechanical property when being cooled to 170 +/-5 ℃.
Wherein the vibration aging treatment specifically comprises the following steps: according to the size of the ring piece (the ring piece with the rectangular section with the inner diameter of 1000mm, the outer diameter of 1200mm and the height of 120 mm) and the distribution condition of the internal residual stress, a vibration exciter is selected to carry out vibration aging treatment of local resonance, and a proper supporting mode of the ring piece, a proper clamping mode and position of the sensor, a proper clamping mode, a proper vibration exciting position, a proper vibration exciting direction, a proper vibration exciting force, a proper vibration exciting frequency and a proper vibration exciting time of the vibration exciter are obtained through finite element modeling simulation, wherein the single vibration exciting time at the same position is 15.
(c) And uniformly heating the ring piece subjected to vibration aging to 170 ℃, and carrying out aging treatment of keeping the temperature for 12 hours and then air cooling to room temperature.
Further, in the solution treatment in the step (a) and the aging treatment in the step (c), specific heat treatment parameters are obtained from related experience, so that the ring is free from cracks, excessive heating and overburning and uniform in temperature in the whole heat treatment process.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A vibration heat treatment process method for a hot-rolled aluminum alloy ring piece is characterized by comprising the following steps: the method specifically comprises the following steps:
(a) after the aluminum alloy ring piece is subjected to hot rolling, the aluminum alloy ring piece is immediately taken down from a ring rolling mill, and the ring piece is directly and uniformly heated to a certain temperature under the condition that the ring piece has residual rolling temperature, and subjected to solution treatment;
(b) selecting a proper quenching cooling speed for cooling the ring piece subjected to the solution treatment in the step (a), and controlling the temperature of the ring piece taken out from a quenching medium to be 170 +/-5 ℃ by measuring with an infrared thermometer or by practical experience, and immediately carrying out vibration aging treatment on the ring piece;
(c) and (c) uniformly heating the ring subjected to the vibration aging treatment in the step (b) to a certain temperature, and performing aging treatment.
2. The method of claim 1, wherein: the aluminum alloy in the step (a) is a heat-treatable strengthened aluminum alloy.
3. The method of claim 1, wherein: the proper quenching cooling speed in the step (b) is selected through empirical judgment or computer virtual simulation, and the cooling speed of the quenching cooling speed needs to ensure that the ring piece has qualified metallographic structure and mechanical property when being cooled to 170 +/-5 ℃.
4. The method of claim 1, wherein: the vibration aging treatment in the step (b) is specifically as follows: the vibration aging treatment of integral structure resonance or local resonance can be selected according to the size of the ring piece and the distribution condition of internal residual stress, and the proper supporting mode, the proper clamping mode and position of the sensor, the proper clamping mode, the excitation position, the excitation direction, the excitation force, the excitation frequency and the excitation time of the ring piece, and the single excitation time of the same position is generally not more than 30 min.
5. The method of claim 1, wherein: the solution treatment in the step (a) and the aging treatment in the step (c), the specific heat treatment parameters can be obtained by related experience or reference manual inquiry, and the requirements of ensuring that the ring does not generate cracks, is not overheated and is burnt, and the temperature is uniform in the whole heat treatment process are required.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911042354.1A CN110643912A (en) | 2019-10-30 | 2019-10-30 | Vibration heat treatment process method for hot-rolled aluminum alloy ring piece |
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| CN201911042354.1A CN110643912A (en) | 2019-10-30 | 2019-10-30 | Vibration heat treatment process method for hot-rolled aluminum alloy ring piece |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112609138A (en) * | 2020-12-29 | 2021-04-06 | 山东豪迈机械科技股份有限公司 | Stress removing method for thin-wall aluminum alloy casting |
| CN115305421A (en) * | 2022-07-25 | 2022-11-08 | 中南大学 | Thermal vibration aging method and device for regulating and controlling residual stress and performance of high-strength aluminum alloy |
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2019
- 2019-10-30 CN CN201911042354.1A patent/CN110643912A/en active Pending
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| CN103589855A (en) * | 2013-12-03 | 2014-02-19 | 北京航空航天大学 | Low temperature treatment-vibration aging combined residual stress homogenization method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112609138A (en) * | 2020-12-29 | 2021-04-06 | 山东豪迈机械科技股份有限公司 | Stress removing method for thin-wall aluminum alloy casting |
| CN112609138B (en) * | 2020-12-29 | 2022-03-25 | 山东豪迈机械科技股份有限公司 | Stress removing method for thin-wall aluminum alloy impeller |
| CN115305421A (en) * | 2022-07-25 | 2022-11-08 | 中南大学 | Thermal vibration aging method and device for regulating and controlling residual stress and performance of high-strength aluminum alloy |
| CN115305421B (en) * | 2022-07-25 | 2023-10-27 | 中南大学 | Thermal vibration aging method and device for regulating and controlling residual stress and performance of high-strength aluminum alloy |
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