CN114635022B - Cryogenic ultrasonic shot blasting device and method with continuously adjustable shot blasting distance - Google Patents
Cryogenic ultrasonic shot blasting device and method with continuously adjustable shot blasting distance Download PDFInfo
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- CN114635022B CN114635022B CN202210241323.4A CN202210241323A CN114635022B CN 114635022 B CN114635022 B CN 114635022B CN 202210241323 A CN202210241323 A CN 202210241323A CN 114635022 B CN114635022 B CN 114635022B
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- shot blasting
- chamber
- cooling chamber
- flange
- guide sleeve
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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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
-
- 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
- C21D11/00—Process control or regulation for heat treatments
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a cryogenic ultrasonic shot blasting device and a method with continuously adjustable shot blasting distance, which are characterized in that the cryogenic ultrasonic shot blasting device structurally comprises a base, a guide sleeve and a screw rod; the base is provided with two ends, the base is hollow and communicated with the two ends, and an air cooling chamber and a shot blasting chamber are arranged in the base; the air cooling chamber is used for inserting an ultrasonic probe to be used; the guide sleeve pipe is hollow and communicated with the two ends, the guide sleeve pipe is provided with a connection end, the connection end is fixedly connected with the end face adjacent to the shot blasting chamber, and the guide sleeve pipe is in threaded connection with the screw rod; the screw rod is hollow and communicated with the two ends, the screw rod is provided with a test end, and the screw rod rotates to control the test end to move in and out of the shot blasting chamber; according to the invention, the shot blasting distance can be continuously adjusted, different shot blasting distances can be selected according to the material characteristics, and shot blasting samples with different impact energies can be obtained, so that a higher strength and a deeper surface fine grain strengthening layer can be obtained, and meanwhile, the shot blasting uniformity of the samples can be ensured.
Description
Technical Field
The invention relates to the field of ultrasonic shot blasting devices, in particular to a cryogenic ultrasonic shot blasting device and method with continuously adjustable shot blasting distance.
Background
The ultrasonic shot peening strengthening is a surface nanocrystallization technology, can lead the surface of a material to generate severe plastic deformation, realize surface nanocrystallization, introduce residual compressive stress, strengthen physical and chemical characteristics, and has great advantages in the technical field of surface strengthening due to the advantages of simple and compact equipment structure, good surface roughness of a strengthened workpiece, no environmental pollution and the like;
ultrasonic peening mainly improves strength by refining grains of parts, and different peening energy can be obtained by different peening distances. Generally, the smaller the shot distance, the greater the shot energy; the change of the shot blasting energy can introduce different residual compressive stress to obtain fine crystal strengthening layers with different depths; continuous adjustment of shot blasting distance at cryogenic temperatures is not achieved.
Therefore, a technical scheme capable of solving the problem that the shot blasting distance of the conventional shot blasting device cannot be continuously adjusted is urgently needed.
Disclosure of Invention
The invention aims to provide a cryogenic ultrasonic shot blasting device and method with continuously adjustable shot blasting distance, which are used for solving the problem that the shot blasting distance of the conventional shot blasting device cannot be continuously adjusted.
In order to solve the technical problems, the invention provides a cryogenic ultrasonic shot blasting device with continuously adjustable shot blasting distance, which comprises a base, a guide sleeve and a screw rod; the base is hollow and communicated with the two ends, and an air cooling chamber and a shot blasting chamber are arranged in the base; the air cooling chamber is used for inserting an ultrasonic probe to be used; the guide sleeve pipe is hollow and communicated with two ends, the guide sleeve pipe is provided with a connection end, the connection end is fixedly connected with the end face adjacent to the shot blasting chamber, and the guide sleeve pipe is in threaded connection with the screw rod; the screw rod is hollow and is communicated with two ends, the screw rod is provided with a test end, and the screw rod is rotated to control the test end to move in and out of the shot blasting chamber.
In one embodiment, two ends of the base are respectively provided with a wind flange and a spraying flange, the wind flange is arranged adjacent to the air cooling chamber, and the spraying flange is arranged adjacent to the shot blasting chamber.
In one embodiment, the base is provided with a narrowing section, the narrowing section is arranged in the air cooling chamber, the narrowing section is arranged adjacent to the shot blasting chamber, and the narrowing section narrows from the air cooling chamber to the shot blasting chamber; the wall of the shot blasting chamber is used for abutting against the peripheral wall of the ultrasonic probe.
In one embodiment, an air outlet connector and an air inlet connector are arranged on the outer side of the air cooling chamber, and the air outlet connector and the air inlet connector are connected and communicated with the air cooling chamber.
In one embodiment, the connection end is provided with a connection flange, and the connection flange is fixedly connected with the spraying flange; a limiting step is arranged in the guide sleeve pipe and is arranged adjacent to the connection flange; the screw is provided with a limiting shoulder, and the limiting shoulder is arranged adjacent to the test end; the limiting step is abutted with the limiting shoulder and used for preventing the screw from moving.
In one embodiment, the screw is provided with a filling port at a position far away from the test end, and a cooling chamber is arranged in the screw.
In one embodiment, the range of travel into which the test tip extends is 0-65 um.
In one embodiment, the wind flange is provided with a circle of installation sealing grooves, and the installation sealing grooves are arranged on the end face of the wind flange; the deep-cooling ultrasonic shot blasting device further comprises a sealing ring, and the sealing ring is installed in the installation sealing groove.
In one embodiment, the spraying flange is provided with a circle of connection sealing grooves, and the connection sealing grooves are arranged on the end face of the spraying flange; the deep-cooling ultrasonic shot blasting device further comprises a sealing ring, and the sealing ring is installed in the connecting sealing groove.
The invention also provides a method for continuously adjusting the shot blasting distance, which comprises the steps of mounting the outer end face of the air cooling chamber of the base on a mounting plate; the ultrasonic probe penetrates through the mounting plate and extends to the shot blasting chamber through the air cooling chamber; placing shot into the shot chamber; fixing a sample to the test end; assembling the screw with the guide sleeve tube; adjusting the extending distance of the test end; assembling the connection end of the guide sleeve with the end face of the shot blasting chamber of the base, and ensuring that the test end is aligned with the shot blasting chamber; the cooling chamber is used for introducing a cooling medium; the air cooling chamber is filled with cooling gas; and starting the ultrasonic probe.
The beneficial effects of the invention are as follows:
due to the arrangement of the guide sleeve pipe and the screw, the extending distance of the test end can be conveniently and rapidly adjusted only by rotating the screw, so that the height of the sample in the shot blasting chamber is adjusted; a cooling chamber is also provided in the screw, and a cooling medium is introduced to subject the sample to shot blasting in a cryogenic state.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the structure of a device according to a first embodiment of the present invention;
FIG. 2 is an enlarged view of portion B of FIG. 1;
FIG. 3 is an enlarged view of portion C of FIG. 1;
FIG. 4 is a schematic application diagram of the apparatus of the first embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the guide sleeve and screw of the first embodiment of the present invention;
FIG. 6 is a cross-sectional view of a guide sleeve and screw of a first embodiment of the present invention;
FIG. 7 is a cross-sectional view showing an extended state of the guide sleeve and the screw according to the first embodiment of the present invention;
FIG. 8 is an enlarged view of portion A of FIG. 7;
fig. 9 is a schematic view of the structure of a guide sleeve and a screw according to a second embodiment of the present invention.
The reference numerals are as follows:
1-a base; 11-an air cooling chamber; a 111-outlet connector; 112-an air inlet joint; 12-shot blasting chamber; 13-wind flange; 131-installing a sealing groove; 14-spraying a flange; 141-connecting a sealing groove; 15-narrowing;
2-a guide sleeve; 21-a connection end; 22-connecting flanges; 23-limiting steps; 24-limiting through holes;
3-a screw; 31-test end; 32-charging interface; 33-a cooling chamber; 34-a stop shoulder;
4-an ultrasonic probe;
5-mounting plates;
6-sealing ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
A first embodiment of a cryogenic ultrasonic peening apparatus is shown in figures 1, 4 and 7 and comprises a base 1, a guide sleeve 2 and a screw 3; the base 1 is provided with two ends, the base 1 is hollow and communicated with the two ends, and an air cooling chamber 11 and a shot blasting chamber 12 are arranged in the base 1; the air cooling chamber 11 is used for inserting an ultrasonic probe 4 to be used; the guide sleeve pipe 2 is hollow and communicated with two ends, the guide sleeve pipe 2 is provided with a connection end 21, the connection end 21 is fixedly connected with the end face adjacent to the shot blasting chamber 12, and the guide sleeve pipe 2 is in threaded connection with the screw 3; the screw 3 is hollow and is communicated with two ends, the screw 3 is provided with a test end 31, and the screw 3 rotates to control the test end 31 to move into and out of the shot blasting chamber 12.
In application, the end of the air cooling chamber 11 of the base 1 is mounted on the mounting plate 5, the ultrasonic probe 4 passes through the mounting plate 5, is inserted into the air cooling chamber 11 and extends to the shot blasting chamber 12, and shot blasting is carried out in the shot blasting chamber 12, wherein the shot blasting is metal shot or ceramic shot; the screw 3 is in threaded connection with the guide sleeve pipe 2, a sample is stuck and fixed on the test end 31, and the test end 31 is changed into a seal from opening by sticking the sample; adjusting the extending distance of the test end 31, namely selecting different shot blasting distances according to the material characteristics, obtaining shot blasting samples with different impact energies, obtaining a higher-strength and deeper surface fine grain strengthening layer, and simultaneously ensuring shot blasting uniformity; connecting and fixing the connection end 21 of the guide sleeve 2 and the outer end surface of the shot blasting chamber 12, ensuring that the test end 31 is aligned with the shot blasting chamber 12, and driving the ultrasonic probe 4 to perform shot blasting; the mounting plate 5 used for the stationary base 1 is provided with a through hole through which the ultrasonic probe 4 passes.
Further, in this embodiment, as shown in fig. 1, the base 1 is provided with a wind flange 13 and a spray flange 14 at both ends thereof, the wind flange 13 being disposed adjacent to the air cooling chamber 11, and the spray flange 14 being disposed adjacent to the shot blasting chamber 12.
When the air flange 13 is applied, the air flange 13 is fixedly connected with the mounting plate 5, and the spraying flange 14 is fixedly connected with the connection end 21.
Further, in this embodiment, as shown in fig. 1 and 4, the base 1 is provided with a narrowing section 15, the narrowing section 15 is provided in the air cooling chamber 11, the narrowing section 15 is disposed adjacent to the peening chamber 12, and the narrowing section 15 narrows from the air cooling chamber 11 toward the peening chamber 12; the wall of the shot blast chamber 12 is used to abut against the peripheral wall of the ultrasonic probe 4.
In application, the narrowing section 15 is provided to fit one end of the ultrasonic probe 4 in contact with the shot blast, so that the wall of the shot blast chamber 12 is abutted against the peripheral wall of the ultrasonic probe 4, and contact between the shot blast and the ultrasonic probe 4 is ensured.
Further, in this embodiment, as shown in fig. 1, an air outlet joint 111 and an air inlet joint 112 are arranged outside the air cooling chamber 11, and the air outlet joint 111 and the air inlet joint 112 are connected and communicated with the air cooling chamber 11.
In application, the air outlet joint 111 and the air inlet joint 112 are arranged to introduce cooling gas into the air cooling chamber 11 in the shot blasting chamber 12 to take away heat generated by the ultrasonic probe 4 during operation, so that the ultrasonic probe 4 operates at a normal operating temperature.
Further, in this embodiment, as shown in fig. 5, 6, 7 and 8, the connection end 21 is provided with a connection flange 22, and the connection flange 22 is fixedly connected with the spraying flange 14; a limiting step 23 is arranged in the guide sleeve 2, and the limiting step 23 is arranged adjacent to the connection flange 22; the screw 3 is provided with a limit shoulder 34, and the limit shoulder 34 is arranged adjacent to the test end 31; the limit step 23 abuts against the limit shoulder 34 for preventing the movement of the screw 3.
In the application, the limiting step 23 and the limiting shoulder 34 are arranged, so that the test end 31 of the screw 3 keeps the state that the test end 31 extends into the shot blasting chamber 12 to a distance of 0 under the condition that the test end 31 does not extend into the shot blasting chamber 12, and the test end 31 is prevented from backing.
Further, in this embodiment, as shown in fig. 7, a filling port 32 is provided in the screw 3 at a position remote from the test end 31, and a cooling chamber 33 is provided in the screw 3.
In use, the cooling chamber 33 may be filled with a cooling medium to cool the sample, which may be a solid coolant, which may be dry ice, a liquid coolant, which may be liquid nitrogen, or a gaseous coolant.
Further, in this embodiment, as shown in fig. 7, referring to the extended state of the test end 31 in fig. 7, the range of travel in which the test end 31 extends is 0 to 65um.
Further, in this embodiment, as shown in fig. 1 and 2, the wind flange 13 is provided with a circle of installation seal grooves 131, and the installation seal grooves 131 are provided on the end face of the wind flange 13; the deep-cooling ultrasonic peening apparatus further includes a seal ring 6, and the seal ring 6 is mounted to the mounting seal groove 131.
In the application, the seal groove 131 and the seal ring 6 are provided to keep the connection between the air flange 13 and the mounting plate 5 sealed, so that the air cooling chamber 11 is cooled more effectively.
Further, in this embodiment, as shown in fig. 1 and 3, the spray flange 14 is provided with a circle of connection sealing grooves 141, and the connection sealing grooves 141 are provided on the end face of the spray flange 14; the cryogenic ultrasonic peening device further comprises a sealing ring 6, and the sealing ring 6 is installed on the connecting sealing groove 141.
In use, the connection seal groove 141 and the seal ring 6 are provided to maintain a seal for the connection between the spout flange 14 and the docking flange 22.
One embodiment of a method for continuously adjusting shot blasting distance is shown in fig. 4, and comprises the steps of mounting the outer end surface of an air cooling chamber 11 of a base 1 on a mounting plate 5; the ultrasonic probe 4 passes through the mounting plate 5 and extends to the shot blasting chamber 12 through the air cooling chamber 11; placing the shot in a shot chamber 12; fixing the sample to the test end 31; assembling the screw 3 with the guide sleeve 2; adjusting the extending distance of the test end 31; assembling the connection end 21 of the guide sleeve 2 with the outer end surface of the shot blasting chamber 12 of the base 1, and ensuring that the test end 31 is aligned with the shot blasting chamber 12; the cooling chamber 33 introduces a cooling medium; the air cooling chamber 11 is filled with cooling gas; the ultrasonic probe 4 is activated.
The operation sequence is appropriately adjusted to be more suitable for the actual situation of performing the shot blasting at the time of application.
In a second embodiment of the cryogenic ultrasonic peening apparatus shown in fig. 9, a plurality of limiting through holes 24 are provided in the peripheral wall of the guide sleeve pipe 2, and threads are provided in the limiting through holes 24.
In use, the limiting aperture 24 may be used in conjunction with a screw to prevent rotation of the screw 3 and thus movement of the screw 3 to ensure that the sample does not move with the screw during the test.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (6)
1. A cryogenic ultrasonic shot blasting device with continuously adjustable shot blasting distance is characterized in that,
comprises a base, a guide sleeve and a screw;
the base is hollow and communicated with the two ends, and an air cooling chamber and a shot blasting chamber are arranged in the base;
the air cooling chamber is used for inserting an ultrasonic probe to be used;
the guide sleeve pipe is hollow and communicated with two ends, the guide sleeve pipe is provided with a connection end, the connection end is fixedly connected with the end face adjacent to the shot blasting chamber, and the guide sleeve pipe is in threaded connection with the screw rod;
the screw rod is hollow and is communicated with two ends, the screw rod is provided with a test end, and the screw rod is rotated to control the test end to move in and out of the shot blasting chamber;
the screw is provided with a filling interface at a position far away from the test end, and a cooling chamber is arranged in the screw;
the two ends of the base are respectively provided with an air flange and a spraying flange, the air flange is arranged adjacent to the air cooling chamber, and the spraying flange is arranged adjacent to the shot blasting chamber;
the wind flange is provided with a circle of installation sealing groove, and the installation sealing groove is arranged on the end face of the wind flange;
the deep-cooling ultrasonic shot blasting device further comprises a sealing ring, and the sealing ring is arranged in the installation sealing groove;
the spraying flange is provided with a circle of connecting sealing grooves, and the connecting sealing grooves are arranged on the end face of the spraying flange;
the deep-cooling ultrasonic shot blasting device further comprises a sealing ring, and the sealing ring is installed in the connecting sealing groove.
2. The cryogenic ultrasonic peening device according to claim 1, wherein,
the base is provided with a narrowing section, the narrowing section is arranged in the air cooling chamber, the narrowing section is arranged adjacent to the shot blasting chamber, and the narrowing section narrows from the air cooling chamber to the shot blasting chamber;
the wall of the shot blasting chamber is used for abutting against the peripheral wall of the ultrasonic probe.
3. The cryogenic ultrasonic peening device according to claim 1, wherein,
the air-cooling chamber is characterized in that an air outlet connector and an air inlet connector are arranged on the outer side of the air-cooling chamber, and the air outlet connector and the air inlet connector are connected and communicated with the air-cooling chamber.
4. The cryogenic ultrasonic peening device according to claim 1, wherein,
the connection end is provided with a connection flange which is fixedly connected with the spraying flange;
a limiting step is arranged in the guide sleeve pipe and is arranged adjacent to the connection flange;
the screw is provided with a limiting shoulder, and the limiting shoulder is arranged adjacent to the test end;
the limiting step is abutted with the limiting shoulder and used for preventing the screw from moving.
5. The cryogenic ultrasonic peening device according to claim 1, wherein,
the range of travel of the test end extending in is 0-65 um.
6. A method for continuously adjusting shot blasting distance, characterized in that the cryogenic ultrasonic shot blasting device of claim 1 is applied, comprising the following steps,
mounting the outdoor end face of the air cooling chamber of the base on a mounting plate;
the ultrasonic probe penetrates through the mounting plate and extends to the shot blasting chamber through the air cooling chamber;
placing shot into the shot chamber;
fixing a sample to the test end;
assembling the screw with the guide sleeve tube;
adjusting the extending distance of the test end;
assembling the connection end of the guide sleeve with the end face of the shot blasting chamber of the base, and ensuring that the test end is aligned with the shot blasting chamber;
the cooling chamber is used for introducing a cooling medium;
the air cooling chamber is filled with cooling gas;
and starting the ultrasonic probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210241323.4A CN114635022B (en) | 2022-03-11 | 2022-03-11 | Cryogenic ultrasonic shot blasting device and method with continuously adjustable shot blasting distance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210241323.4A CN114635022B (en) | 2022-03-11 | 2022-03-11 | Cryogenic ultrasonic shot blasting device and method with continuously adjustable shot blasting distance |
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| Publication Number | Publication Date |
|---|---|
| CN114635022A CN114635022A (en) | 2022-06-17 |
| CN114635022B true CN114635022B (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210241323.4A Active CN114635022B (en) | 2022-03-11 | 2022-03-11 | Cryogenic ultrasonic shot blasting device and method with continuously adjustable shot blasting distance |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097544A (en) * | 2018-09-19 | 2018-12-28 | 西北工业大学 | A kind of ultrasound kinetic energy shot-blast unit |
| CN111215898A (en) * | 2019-10-28 | 2020-06-02 | 南京航空航天大学 | Electric arc additive synchronous ultrasonic hot rolling and rapid cooling combined machining device and method |
| CN111842530A (en) * | 2020-07-06 | 2020-10-30 | 安徽工程大学 | High-performance wire production process method and device |
| CN113798516A (en) * | 2021-09-17 | 2021-12-17 | 中南大学 | Device and method for strengthening electric arc additive component by adopting cryogenic shock deformation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2812285B1 (en) * | 2000-07-28 | 2003-02-07 | Univ Troyes Technologie | NANOSTRUCTURE PROCESSING METHOD AND NANOSTRUCTURE PROCESSING DEVICE |
-
2022
- 2022-03-11 CN CN202210241323.4A patent/CN114635022B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097544A (en) * | 2018-09-19 | 2018-12-28 | 西北工业大学 | A kind of ultrasound kinetic energy shot-blast unit |
| CN111215898A (en) * | 2019-10-28 | 2020-06-02 | 南京航空航天大学 | Electric arc additive synchronous ultrasonic hot rolling and rapid cooling combined machining device and method |
| CN111842530A (en) * | 2020-07-06 | 2020-10-30 | 安徽工程大学 | High-performance wire production process method and device |
| CN113798516A (en) * | 2021-09-17 | 2021-12-17 | 中南大学 | Device and method for strengthening electric arc additive component by adopting cryogenic shock deformation |
Non-Patent Citations (1)
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| 王妍洁."7075铝合金超声喷丸表面改性研究".中国优秀硕士学位论文全文数据库工程科技Ⅰ辑.2017,(第第9期期),B022-121. * |
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