CN115896660A - Titanium alloy strengthening device and method in planar intersection system in pulse magnetic field - Google Patents
Titanium alloy strengthening device and method in planar intersection system in pulse magnetic field Download PDFInfo
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- CN115896660A CN115896660A CN202211322288.5A CN202211322288A CN115896660A CN 115896660 A CN115896660 A CN 115896660A CN 202211322288 A CN202211322288 A CN 202211322288A CN 115896660 A CN115896660 A CN 115896660A
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 76
- 238000005728 strengthening Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 30
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 59
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims abstract description 16
- 239000002344 surface layer Substances 0.000 claims abstract description 13
- 230000005284 excitation Effects 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 4
- 239000012811 non-conductive material Substances 0.000 claims description 2
- 239000008188 pellet Substances 0.000 claims 3
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 239000010949 copper Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000005480 shot peening Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 229910000883 Ti6Al4V Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000006187 pill Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The application provides a titanium alloy in plane intersection system strengthens device in pulsed magnetic field, strengthen the device and include: a circular solenoid for generating a uniform strong magnetic field; transparent resin material filled around the circular solenoid to form one cylinder with closed bottom; the aluminum pipe is arranged in the cylinder and is attached to the inner wall of the cylinder; a titanium alloy device can be accommodated within the aluminum pipe with a gap left between the titanium alloy device and the aluminum pipe; a shot disposed between the titanium alloy device and the aluminum tube; when current flows through the circular solenoid, the current interacts with excitation current generated in the aluminum tube to form surface layer magnetic pressure, and the surface layer magnetic pressure is transmitted to the surface of the titanium alloy device through the shot to impact the titanium alloy device so as to achieve the effect of strengthening the surface of the titanium alloy device.
Description
Technical Field
The application belongs to the technical field of metal material surface strengthening, and particularly relates to a titanium alloy strengthening device and method in a plane intersection system in a pulsed magnetic field.
Background
Titanium alloy has been increasingly applied to key parts such as airplane bodies, engine compressors and the like because of the characteristics of corrosion resistance, high temperature resistance, high strength and the like, and even plays an important role as a structural part on missiles and rockets. Therefore, a strengthening method for improving the strength, hardness, and other properties of these titanium alloy members is also extremely important. The conventional metal surface strengthening method has certain disadvantages.
For example, the surface heat treatment technology has strict requirements on furnace temperature control and furnace atmosphere, and a part to be treated can be scrapped if the part is not properly treated, so that multi-way loss is caused. And the furnace body is matched with equipment such as a cooling tank and the like, so that the whole equipment is large and heavy.
Although the shot blasting treatment is simple in equipment and low in cost, the surface of a treated device is damaged and peeled off, and when a thin part is treated, the part is deformed and the appearance of the part is damaged due to high-speed impact of a large number of shots on one side.
The rolling method for processing the metal is easy to cause the surface layer and the inner part of the metal to be layered and fall off, and is difficult to process slender rods, thin-wall pipe fittings, even complex parts and the like.
The pulsed magnetic field technology generates a strong pulsed magnetic field through instantaneous discharge of high voltage and low capacitance, so that the near surface of metal placed in the magnetic field generates exciting current, namely skin effect, and the magnetic field and the exciting current on the metal surface are mutually cut to form magnetic pressure in the GPa level. And the strong magnetic field energy generated in the process can be transferred to the atomic scale of the metal under the condition that the magnetic field energy and the magnetic field energy are not in contact, so that dislocation is generated in the magnetic field energy and the magnetic field energy, dislocation movement is pushed, and the spin state, the arrangement rule and the like of electrons outside the atomic core can be changed.
By utilizing the principle, the pulse magnetic field strengthening is carried out on Cu, al and alloy thereof and high-speed tool steel at present, and obvious effect is achieved. If the magnetic pressure acting on the metal surface is larger, the excitation current generated in the metal is more concentrated on the metal surface layer, and the conductivity of the metal is one of the key parameters influencing the depth according to a skin depth calculation formula of the excitation current. The electrical conductivity of the titanium alloy (taking Ti-6Al-4V as an example) is smaller and is different from that of Al and Cu by an order of magnitude, so that the exciting current generated inside the titanium alloy in a magnetic field is more dispersed, and the magnetic pressure has little effect on the titanium alloy.
In addition, when materials such as thin plates are processed in such a strong magnetic field, the parts are easily deformed due to uneven stress. Therefore, a reasonable method and a reasonable device are needed for effectively strengthening the titanium alloy device.
Disclosure of Invention
In order to solve the above technical problem, in a first aspect, the present application provides a titanium alloy strengthening device in a planar intersection system in a pulsed magnetic field, the strengthening device comprising:
a circular solenoid for generating a uniform strong magnetic field;
transparent resin material filled around the circular solenoid to form one cylinder with closed bottom;
the aluminum pipe is arranged in the cylinder and is attached to the inner wall of the cylinder; the aluminum pipe is used for generating exciting current to form surface magnetic pressure; a titanium alloy device can be accommodated within the aluminum pipe with a gap left between the titanium alloy device and the aluminum pipe;
a shot disposed between the titanium alloy device and the aluminum tube; wherein the shot is used for transferring energy in a magnetic field to the surface of the titanium alloy device;
when current flows through the circular solenoid, the current interacts with excitation current generated in the aluminum tube to form surface layer magnetic pressure, and the surface layer magnetic pressure is transmitted to the surface of the titanium alloy device through the shot to impact the titanium alloy device so as to achieve the effect of strengthening the surface of the titanium alloy device.
Preferably, the cylinder is open at an upper end, and the reinforcing apparatus further comprises:
an end cap for closing the opening; wherein the opening is used for taking and placing a sample.
Preferably, the end cap is a movable end cap, and the end cap is made of an insulating transparent resin material.
Preferably, the projectile comprises a projectile made of a non-conductive material and a projectile made of a weakly conductive material.
Preferably, straight rods are reserved at two ends of the circular solenoid; wherein the straight rod is axially parallel to the circular solenoid.
Preferably, the reinforcement device further comprises:
the high-voltage pulse power supply equipment is connected with the straight rods at the two ends of the circular solenoid and is used for generating high-voltage pulse current;
when the current of the high-voltage pulse power supply equipment flows through the circular solenoid, the current interacts with the exciting current generated in the aluminum pipe to form surface layer magnetic pressure, and the surface layer magnetic pressure is quickly transmitted to the surface of the titanium alloy device through the shot filled between the aluminum pipe and the titanium alloy device to impact the titanium alloy device so as to achieve the effect of strengthening the surface of the titanium alloy device.
In a second aspect, the present application further provides a method for strengthening a titanium alloy in a planar intersection system within a pulsed magnetic field, the method comprising:
inserting a titanium alloy device to be treated into an aluminum tube;
filling the shot into all gaps between the titanium alloy device and the aluminum pipe;
connecting binding posts of high-voltage pulse power supply equipment with straight rods at two ends of a circular solenoid;
and charging a capacitor in the high-voltage pulse power supply equipment, and switching on a high-voltage switch to discharge after the capacitor reaches a preset voltage to finish pulse impact strengthening treatment.
Preferably, the strengthening method further comprises:
and carrying out multiple times or multiple voltage impacts on the device to be processed according to the impact effect and the preset target.
The beneficial technical effect of this application:
according to the method, an aluminum pipe is used as an energy generating device in an impact process, and a shot is used as an energy transfer device in the impact process, so that magnetic field energy is quickly and efficiently transferred to the surface of a titanium alloy device to be treated, and the effect of strengthening the surface of the titanium alloy is achieved; according to the method, the titanium alloy device at the middle position is impacted in a plane intersection system by using the aluminum pipe, so that the problem that the titanium alloy device is easy to deform under unidirectional stress is solved; this application uses the shot to extrude the device surface, has avoided the device top layer loss that shot peening caused.
Drawings
FIG. 1 is a cross-sectional view of a titanium alloy strengthening device in a planar intersection system according to an exemplary embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a titanium alloy strengthening device in a planar intersection system according to an embodiment of the present disclosure;
FIG. 3 is a schematic overall view of a titanium alloy strengthening device in a plane intersection system according to an embodiment of the present application;
wherein: 1-pill; 2-a circular solenoid; 3-an aluminum tube; 4-end cover; 5-a transparent resin material; 6-titanium alloy gear components.
Detailed Description
The application provides a titanium alloy strengthening device and a method in a plane intersection system in a pulse magnetic field, wherein the strengthening device comprises: a circular solenoid for generating a uniform strong magnetic field; the aluminum pipe is used for generating exciting current to form surface magnetic pressure; the titanium alloy device is arranged at the central position of the impact device; a gap is reserved between the titanium alloy device and the aluminum pipe; and the shot is arranged between the titanium alloy device and the aluminum pipe and used for transferring the energy in the magnetic field to the surface of the titanium alloy device.
Wherein, the circumference of the circular solenoid is filled with transparent resin material; the transparent resin material is used for fixing, supporting, insulating and protecting the solenoid. The lower end of the circular solenoid is closed, and the upper end of the circular solenoid is provided with a movable end cover for taking and placing samples. The sealing and end cover materials are both made of insulating transparent resin materials. The outer diameter of the aluminum pipe is equal to the inner diameter of the solenoid filled with the transparent resin material, and the aluminum pipe can be tightly attached to the solenoid and ensure the stress uniformity of the aluminum pipe.
Further, the radial length of the aluminum tube should be less than or equal to the radial length of the interior of the solenoid after being wrapped with the transparent resin material, so as to ensure the effectiveness of the magnetic field treatment. The projectile should be made of a non-conductive or weakly conductive material and should be small in size so as to fill all the gap positions and ensure the precision of device processing. Straight rods are reserved at two ends of the circular solenoid; wherein the straight rod is axially parallel to the circular solenoid.
In one possible implementation, the strengthening device further includes: high-voltage pulse power supply equipment; the high-voltage pulse power supply equipment is connected with straight rods at two ends of the circular solenoid and is used for generating high-voltage pulse current; when current of the high-voltage pulse power supply equipment flows through the circular solenoid, the current interacts with exciting current generated in the aluminum tube to form surface layer magnetic pressure, and the surface layer magnetic pressure is quickly transmitted to the surface of the titanium alloy through the shot filled between the aluminum tube and the titanium alloy device to impact the titanium alloy device so as to achieve the effect of strengthening the surface of the titanium alloy device.
According to the method, an aluminum tube is used as an energy generating device in an impact process, and a shot is used as an energy transfer device in the impact process, so that magnetic field energy is quickly and efficiently transferred to the surface of a titanium alloy device to be treated, and the effect of strengthening the surface of the titanium alloy is achieved; according to the method, the titanium alloy device at the middle position is impacted in a plane intersection system by using the aluminum pipe, so that the problem that the titanium alloy device is easy to deform under unidirectional stress is solved; this application uses the shot to extrude the device surface, has avoided the device top layer loss that shot peening caused.
The present application will be described in further detail with reference to the accompanying figures 1-3 and the detailed description of the preferred embodiments of the invention:
the application provides a titanium alloy strengthening device and method in a plane intersection system in a pulse magnetic field. The device consists of a projectile 1; a circular solenoid 2; an aluminum pipe 3; an end cap 4; a transparent resin material 5; the titanium alloy gear device 6 is composed, and the specific appearance of the device is shown in figure 2.
In another embodiment of the present application, a method for strengthening a titanium alloy in a planar intersection system in a pulsed magnetic field is provided, comprising the steps of:
(1) Inserting a titanium alloy device to be treated into an aluminum tube;
(2) Filling the shot into all gaps between the titanium alloy device and the aluminum pipe;
(3) Connecting a binding post of a high-voltage pulse power supply device with straight rods at two ends of a circular solenoid, wherein the contact area between the binding post and the circular solenoid is required to be not less than the sectional area of the solenoid;
(4) The method comprises the steps of charging a capacitor in the high-voltage pulse power supply equipment according to a preset processing requirement, switching on a high-voltage switch after the capacitor reaches a preset voltage, and discharging a loop where the device is located to finish pulse impact strengthening processing, wherein multiple times of or multiple voltage impacts can be conducted on a device to be processed according to an impact effect and a preset target.
As can be seen from the formula for calculating the skin depth, in order to concentrate the excitation current in the aluminum tube on a thinner near-surface layer, it is necessary to reduce the number of turns of the circular solenoid as much as possible and use a lower capacitance.
Further, according to the calculation formula of the discharge energy, in order to increase the magnetic pressure between the circular solenoid and the aluminum pipe and make the aluminum pipe have a larger impact force, a larger discharge voltage is required. In order to reduce the heat energy loss generated by the circuit in the discharging process, a metal material with larger cross section area and better electric conductivity needs to be selected for winding the circular solenoid.
The straight rod parts reserved at the two ends of the circular solenoid are parallel to the axial direction of the circular solenoid, so that the magnetic fields generated by the electrified straight rod parts and the circular solenoid part cannot interfere with each other. The inner diameter of the solenoid filled with the transparent resin material is tightly attached to the aluminum tube, so that the stress uniformity of the aluminum tube is ensured. The radial length of the inner part of the solenoid filled with the transparent resin material is larger than or equal to that of the aluminum pipe, so that the effectiveness of magnetic field treatment is ensured. A circular end cap is provided at the upper mouth of the device to prevent the projectile from being squeezed and flying out during impact. Transparent resin materials are filled around the circular solenoid, and after the circular solenoid is solidified, the transparent resin materials can play a role in fixing, supporting and insulating the solenoid and protect the solenoid in the discharging process.
The method can effectively solve the problem that the surface of the titanium alloy device is difficult to strengthen, and can timely adjust the power supply voltage and the impact frequency according to the treatment effect. The circular solenoid can provide a uniform and strong magnetic field for the aluminum pipe, and the radial simultaneous impact of the aluminum pipe can prevent the titanium alloy device from being deformed due to unidirectional stress. The movable end cover in upper end is more convenient for get and puts the sample, has effectively shortened single sample processing cycle, makes efficiency obtain obviously promoting.
In other embodiments of the present application, please refer to fig. 1-3, one embodiment is:
1. preparing a tool:
the solenoid contained in the device is a circular solenoid formed by winding a red copper rod with the diameter of 10mm, the axial length of the solenoid is 170mm, and the outer diameter of the circular section is 120mm. Two ends of the solenoid are respectively reserved with straight rods which are parallel to each other by 100mm and axial to the solenoid and are used for connecting external high-voltage pulse power supply equipment. The periphery of the solenoid is filled with transparent resin material, the thickness is 20mm, the thickness of the lower end seal is 15mm, the upper end cover is movable, the diameter is 130mm, and the thickness is 15mm. The aluminium tube nested within the solenoid has an axial length of 155mm, a cross-sectional external diameter of 90mm and an internal diameter of 80mm.
It should be noted that, in order to reduce the heat generated when current passes through the circular solenoid, a metal material with good electrical conductivity is selected, and the cross-sectional area is made large enough. In addition, the transparent resin material selected should have sufficient strength after setting to prevent cracking or even breaking of the device during impact. In order to ensure that the exciting current generated in the aluminum tube is large enough, the magnetic pressure between the solenoid and the aluminum tube is strong enough, and the radial stress of the aluminum tube is uniform, the outer wall of the aluminum tube is tightly attached to the inner diameter of the solenoid filled with the transparent resin material. The projectile should be made of non-conductive or weakly conductive materials, such as carbon steel shots, glass shots, ceramic shots, plastic shots, etc., and the size of the projectile can be adjusted according to the treatment requirements.
2. The implementation steps are as follows:
(1) Inserting a titanium alloy device with the size smaller than the inner space of the aluminum pipe into the aluminum pipe;
(2) Filling all gaps between the aluminum pipe and the titanium alloy device with the selected shot;
(3) The movable upper end cover is covered, and then the sample assembling step is completed;
(4) Connecting a binding post of high-voltage pulse power supply equipment with straight rods led out from two ends of a circular solenoid, and fastening the binding post by using bolts to ensure that the contact area of the binding post and the binding post is larger than the cross section area of a conductive rod;
(5) The voltage is set to be 8KV, the capacitor is charged, the high-voltage discharge switch is turned on after charging is completed, the circuit is discharged, and the discharge frequency and the charging voltage can be adjusted according to the strengthening effect.
Claims (8)
1. A titanium alloy strengthening device in a planar intersection system within a pulsed magnetic field, the strengthening device comprising:
a circular solenoid for generating a uniform strong magnetic field;
transparent resin material filled around the circular solenoid to form one cylinder with closed bottom;
the aluminum pipe is arranged in the cylinder and is attached to the inner wall of the cylinder; the aluminum pipe is used for generating exciting current to form surface magnetic pressure; a titanium alloy device can be accommodated within the aluminum pipe with a gap left between the titanium alloy device and the aluminum pipe;
a shot disposed between the titanium alloy device and the aluminum tube; wherein the shot is used for transferring energy in a magnetic field to the surface of the titanium alloy device;
when current flows through the circular solenoid, the current interacts with excitation current generated in the aluminum tube to form surface layer magnetic pressure, and the surface layer magnetic pressure is transmitted to the surface of the titanium alloy device through the shot to impact the titanium alloy device so as to achieve the effect of strengthening the surface of the titanium alloy device.
2. The stiffening device of claim 1, wherein the cylinder is open at an upper end, the stiffening device further comprising:
an end cap for closing the opening; wherein the opening is used for taking and placing a sample.
3. The reinforcement apparatus of claim 2, wherein the end caps are removable end caps, and the end caps are made of an insulating transparent resin material.
4. The reinforcement device of claim 3, wherein the pellets comprise pellets of a non-conductive material and pellets of a weakly conductive material.
5. The reinforcement device according to claim 4, wherein a straight rod is reserved at two ends of the circular solenoid; wherein the straight rod is axially parallel to the circular solenoid.
6. The stiffening device of claim 5, further comprising:
the high-voltage pulse power supply equipment is connected with the straight rods at the two ends of the circular solenoid and is used for generating high-voltage pulse current;
when the current of the high-voltage pulse power supply equipment flows through the circular solenoid, the current can interact with the exciting current generated in the aluminum pipe to form surface magnetic pressure, and the surface magnetic pressure is quickly transmitted to the surface of the titanium alloy device through the shot filled between the aluminum pipe and the titanium alloy device to impact the titanium alloy device so as to achieve the effect of strengthening the surface of the titanium alloy device.
7. A method of strengthening a titanium alloy in a planar intersection system within a pulsed magnetic field, the method comprising:
inserting a titanium alloy device to be treated into an aluminum tube;
filling the shot into all gaps between the titanium alloy device and the aluminum pipe;
connecting binding posts of high-voltage pulse power supply equipment with straight rods at two ends of a circular solenoid;
and charging a capacitor in the high-voltage pulse power supply equipment, and switching on a high-voltage switch to discharge after the capacitor reaches a preset voltage to finish pulse impact strengthening treatment.
8. The reinforcement method of claim 7, further comprising:
and carrying out multiple times or multiple voltage impacts on the device to be processed according to the impact effect and the preset target.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211322288.5A CN115896660B (en) | 2022-10-26 | 2022-10-26 | Titanium alloy strengthening device and method in plane convergence system in pulsed magnetic field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211322288.5A CN115896660B (en) | 2022-10-26 | 2022-10-26 | Titanium alloy strengthening device and method in plane convergence system in pulsed magnetic field |
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| CN115896660B CN115896660B (en) | 2024-02-13 |
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2022
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| Title |
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