CN113798445A - Manufacturing method of aluminum cylinder of shock absorber - Google Patents
Manufacturing method of aluminum cylinder of shock absorber Download PDFInfo
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- CN113798445A CN113798445A CN202111046304.8A CN202111046304A CN113798445A CN 113798445 A CN113798445 A CN 113798445A CN 202111046304 A CN202111046304 A CN 202111046304A CN 113798445 A CN113798445 A CN 113798445A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 83
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 230000035939 shock Effects 0.000 title claims description 19
- 239000006096 absorbing agent Substances 0.000 title claims description 17
- 238000000576 coating method Methods 0.000 claims abstract description 48
- 239000011248 coating agent Substances 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000007711 solidification Methods 0.000 claims abstract description 25
- 230000008023 solidification Effects 0.000 claims abstract description 25
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000002844 melting Methods 0.000 claims abstract description 18
- 230000008018 melting Effects 0.000 claims abstract description 18
- 238000005266 casting Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000004321 preservation Methods 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims abstract description 8
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000007547 defect Effects 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims 1
- 238000002604 ultrasonography Methods 0.000 claims 1
- 238000013016 damping Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000009659 non-destructive testing Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/13—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
- B22D31/002—Cleaning, working on castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D35/00—Equipment for conveying molten metal into beds or moulds
- B22D35/06—Heating or cooling equipment
-
- 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
- C21D1/30—Stress-relieving
-
- 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
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Child & Adolescent Psychology (AREA)
- Health & Medical Sciences (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Forging (AREA)
Abstract
The invention relates to the technical field of damping parts, in particular to a manufacturing method of an aluminum cylinder of a vibrator, which comprises a cylinder body and a connecting piece, and comprises the following manufacturing steps: s1: melting aluminum water by aluminum; heating and melting a pure aluminum block into pure aluminum water by using a central melting furnace; s2: putting the molten aluminum into a heat preservation furnace for sealing: preserving the heat of the molten pure aluminum water by using a heat preserving furnace and ventilating for 2-3 h; s3: treating the die: coating different coatings and different coating thicknesses on the surface of the mold to adjust the cooling speed; the coating is selected from ZnO and talcum powder; coating ZnO on two ends of the mould, and coating talcum powder in the middle of the mould; s4: pouring: pouring molten aluminum into a mold through an inclined gravity casting machine, and performing pressure solidification; s5: demolding: cooling and shaping the aluminum water, and then demoulding to obtain a barrel body; the temperature of molten pure aluminum is kept by a heat preservation furnace to ensure the temperature of the molten aluminum during casting, and the uniformity of the temperature in the mold is improved in the aluminum water shaping process by coating ZnO and talcum powder on the surface of the mold.
Description
Technical Field
The invention relates to the technical field of damping parts, in particular to a manufacturing method of an aluminum cylinder of a damper.
Background
The shock absorber aluminum tube is one of the most important parts in common shock absorption parts of motorcycles, electric vehicles and the like, and the whole shock absorption effect is directly influenced by the quality of the shock absorber aluminum tube part, so that the comfort and the safety of the whole vehicle in use are influenced.
The traditional shock absorber aluminum cylinder is produced by pouring, raw materials are firstly smelted into liquid in the production process, then required parts are formed by die casting, and then an assembly inner hole is machined by post-processing. The casting temperature has a great influence on the generation of cracks. The low casting temperature is easy to generate air holes and impurities and also easy to cause cold shut. Stress tends to concentrate there, so cracks are easily generated from the cold shut. The casting temperature is high, and the metal is cooled, solidified and contracted greatly, so that the opportunity of generating cracks is increased. In addition, the uniformity of the cooling rate as the molten metal is continuously poured into the mold through the nozzle forms a high temperature zone (high temperature ring) where the molten metal flows into the mold. Due to heat conduction at two ends of the die, solidification starts from two sides, molten metal in the high-temperature area continuously fills up cooled intercrystalline gaps, but when the molten metal in the high-temperature area is solidified, the molten metal cannot be supplemented, and the molten metal is loosened and pulled to crack. Cracks are generally generated at the pouring spot and are relatively severe.
Disclosure of Invention
The invention aims to solve the defect of insufficient uniformity of the cooling speed of a die in the prior art, and provides a method for manufacturing an aluminum cylinder of a shock absorber.
In order to achieve the purpose, the invention adopts the following technical scheme:
the manufacturing method of the shock absorber aluminum cylinder comprises a cylinder body and a connecting piece, and comprises the following manufacturing steps:
s1: melting aluminum water by aluminum; heating and melting a pure aluminum block into pure aluminum water by using a central melting furnace;
s2: putting the molten aluminum into a heat preservation furnace for sealing: preserving the heat of the molten pure aluminum water by using a heat preserving furnace and ventilating for 2-3 h;
s3: treating the die: coating different coatings and different coating thicknesses on the surface of the mold to adjust the cooling speed; the coating is selected from ZnO and talcum powder; coating ZnO on two ends of the mould, and coating talcum powder in the middle of the mould;
s4: pouring: pouring molten aluminum into a mold through an inclined gravity casting machine, and performing pressure solidification;
s5: demolding: cooling and shaping the aluminum water, and then demoulding to obtain a barrel body;
s6: and welding the connecting piece to the cylinder body, and cutting off part of the cylinder wall of the cylinder body along the axial direction.
Preferably, the pressure setting comprises the following steps:
a1: high-pressure solidification: applying high-pressure gas to the surface of the molten aluminum by a high-pressure gas pump at the moment of die assembly of the die, sequentially applying high pressures of 1-3S/0.5MPa, 3-4S/1MPa, 4-5S/2MPa and 5-10S/3MPa at the time of die assembly start, and sequentially solidifying the molten aluminum according to the sequential solidification principle;
a2: pressure maintaining solidification forming: and maintaining the pressure for 200s and 240s under the high pressure of 3MPa, so that the casting is fully pressurized, solidified and molded.
Preferably, the coating thickness of ZnO described in S3 is 0.3 to 0.6 mm.
Preferably, the thickness of the talc powder described in S3 is kept to be half of the ZnO coating thickness.
Preferably, argon arc welding is adopted for welding the cylinder and the welding connecting piece.
Preferably, the quality of the weld joint of the cylinder is detected in a fluorescent, X-ray or ultrasonic nondestructive mode, and the stress relief annealing is carried out on the weld joint area without defects.
Preferably, the stress relief annealing process comprises the following steps: and (3) putting the welding seam area into an annular resistance furnace, raising the temperature of the annular resistance furnace from room temperature to 580-600 ℃, preserving the heat for 10min, raising the temperature from 580-600 ℃ to 890-930 ℃ at the speed of 10 ℃/min, preserving the heat for 30min, reducing the temperature from 890-930 ℃ to room temperature at the speed of 10 ℃/min, and taking out.
The manufacturing method of the aluminum cylinder of the shock absorber has the beneficial effects that: according to the manufacturing method of the aluminum cylinder of the shock absorber, the temperature of molten pure aluminum water is kept by the heat preservation furnace, so that the temperature of the molten aluminum water during pouring is ensured, and the uniformity of the temperature in the mold during the shaping process of the molten aluminum is improved by coating ZnO and talcum powder on the surface of the mold.
Drawings
Fig. 1 is a schematic structural diagram of a method for manufacturing an aluminum tube of a shock absorber according to the present invention.
In the figure: barrel 1, connecting piece 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1:
referring to fig. 1, a method for manufacturing an aluminum tube of a shock absorber includes the following steps:
s1: melting aluminum water by aluminum; heating and melting a pure aluminum block into pure aluminum water by using a central melting furnace;
s2: putting the molten aluminum into a heat preservation furnace for sealing: preserving the heat of the molten pure aluminum water by using a heat preserving furnace and ventilating for 2-3 h;
s3: treating the die: coating different coatings and different coating thicknesses on the surface of the mold to adjust the cooling speed; the coating is selected from ZnO and talcum powder; coating ZnO on two ends of the mould, and coating talcum powder in the middle of the mould; the coating thickness of ZnO is 0.3; the thickness of the talc powder was kept to 0.15mm for the ZnO coating thickness.
S4: pouring: pouring molten aluminum into a mold through an inclined gravity casting machine, and performing pressure solidification; the pressure solidification comprises the following steps:
a1: high-pressure solidification: applying high-pressure gas to the surface of molten aluminum by a high-pressure gas pump at the moment of die assembly of the die, sequentially applying high pressures of 1S/0.5MPa, 3S/1MPa, 4S/2MPa and 5S/3MPa at the time of die assembly start, and sequentially solidifying the molten aluminum according to the sequential solidification principle;
a2: pressure maintaining solidification forming: and maintaining the pressure for 200s under the high pressure of 3MPa, so that the casting is fully pressurized, solidified and formed.
S5: demolding: cooling and shaping the aluminum water, and then demoulding to obtain a barrel body 1;
s6: and welding the connecting piece 2 to the cylinder body 1, and cutting off part of the cylinder wall of the cylinder body 1 along the axial direction. And performing argon arc welding on the cylinder body 1 and the welding connecting piece 2.
And performing stress relief annealing on the defect-free weld joint area by adopting fluorescence, X-ray or ultrasonic nondestructive testing on the quality of the weld joint of the cylinder 1.
The stress relief annealing process comprises the following steps: and (3) putting the welding seam area into an annular resistance furnace, raising the temperature of the annular resistance furnace from room temperature to 580 ℃, preserving the heat for 10min, raising the temperature from 580 ℃ to 890 ℃ at the speed of 10 ℃/min, preserving the heat for 30min, reducing the temperature from 890 ℃ to room temperature at the speed of 10 ℃/min, and taking out.
Example 2:
referring to fig. 1, a method for manufacturing an aluminum tube of a shock absorber includes the following steps:
s1: melting aluminum water by aluminum; heating and melting a pure aluminum block into pure aluminum water by using a central melting furnace;
s2: putting the molten aluminum into a heat preservation furnace for sealing: preserving the heat of the molten pure aluminum water by using a heat preserving furnace and ventilating for 2-3 h;
s3: treating the die: coating different coatings and different coating thicknesses on the surface of the mold to adjust the cooling speed; the coating is selected from ZnO and talcum powder; coating ZnO on two ends of the mould, and coating talcum powder in the middle of the mould; the coating thickness of ZnO is 0.2 mm; the thickness of the talc powder was kept to 0.1mm for the ZnO coating thickness.
S4: pouring: pouring molten aluminum into a mold through an inclined gravity casting machine, and performing pressure solidification; the pressure solidification comprises the following steps:
a1: high-pressure solidification: applying high-pressure gas to the surface of molten aluminum by a high-pressure gas pump at the moment of die assembly of the die, sequentially applying high pressures of 2S/0.5MPa, 3.5S/1MPa, 4.5S/2MPa and 8S/3MPa at the time of die assembly start, and sequentially solidifying the molten aluminum according to a sequential solidification principle;
a2: pressure maintaining solidification forming: and maintaining the pressure for 220s under the high pressure of 3MPa, so that the casting is fully pressurized, solidified and formed.
S5: demolding: cooling and shaping the aluminum water, and then demoulding to obtain a barrel body 1;
s6: and welding the connecting piece 2 to the cylinder body 1, and cutting off part of the cylinder wall of the cylinder body 1 along the axial direction. And performing argon arc welding on the cylinder body 1 and the welding connecting piece 2.
And performing stress relief annealing on the defect-free weld joint area by adopting fluorescence, X-ray or ultrasonic nondestructive testing on the quality of the weld joint of the cylinder 1.
The stress relief annealing process comprises the following steps: putting the welding seam area into an annular resistance furnace, raising the temperature of the annular resistance furnace from room temperature to 590 ℃, preserving the heat for 10min, raising the temperature from 590 ℃ to 910 ℃ at the speed of 10 ℃/min, preserving the heat for 30min, reducing the temperature from 910 ℃ to room temperature at the speed of 10 ℃/min, and taking out the annular resistance furnace
Example 3:
referring to fig. 1, a method for manufacturing an aluminum tube of a shock absorber includes the following steps:
s1: melting aluminum water by aluminum; heating and melting a pure aluminum block into pure aluminum water by using a central melting furnace;
s2: putting the molten aluminum into a heat preservation furnace for sealing: preserving the heat of the molten pure aluminum water by using a heat preserving furnace and ventilating for 2-3 h;
s3: treating the die: coating different coatings and different coating thicknesses on the surface of the mold to adjust the cooling speed; the coating is selected from ZnO and talcum powder; coating ZnO on two ends of the mould, and coating talcum powder in the middle of the mould; the coating thickness of ZnO is 0.6 mm; the thickness of the talc powder was kept to 0.3mm for the ZnO coating thickness.
S4: pouring: pouring molten aluminum into a mold through an inclined gravity casting machine, and performing pressure solidification; the pressure solidification comprises the following steps:
a1: high-pressure solidification: applying high-pressure gas to the surface of molten aluminum by a high-pressure gas pump at the moment of die assembly of the die, sequentially applying high pressures of 3S/0.5MPa, 4S/1MPa, 5S/2MPa and 10S/3MPa at the time of die assembly start, and sequentially solidifying the molten aluminum according to the sequential solidification principle;
a2: pressure maintaining solidification forming: and maintaining the pressure for 240s under the high pressure of 3MPa, so that the casting is fully pressurized, solidified and formed.
S5: demolding: cooling and shaping the aluminum water, and then demoulding to obtain a barrel body 1;
s6: and welding the connecting piece 2 to the cylinder body 1, and cutting off part of the cylinder wall of the cylinder body 1 along the axial direction. And performing argon arc welding on the cylinder body 1 and the welding connecting piece 2.
And performing stress relief annealing on the defect-free weld joint area by adopting fluorescence, X-ray or ultrasonic nondestructive testing on the quality of the weld joint of the cylinder 1.
The stress relief annealing process comprises the following steps: placing the welding seam region into an annular resistance furnace, heating the temperature of the annular resistance furnace from room temperature to 600 ℃, preserving heat for 10min, heating the temperature from 600 ℃ to 930 ℃ at the speed of 10 ℃/min, preserving heat for 30min, cooling the temperature from 930 ℃ to room temperature at the speed of 10 ℃/min, and taking out
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The manufacturing method of the aluminum cylinder of the shock absorber is characterized by comprising a cylinder body (1) and a connecting piece (2), and the manufacturing steps are as follows:
s1: melting aluminum water by aluminum; heating and melting a pure aluminum block into pure aluminum water by using a central melting furnace;
s2: putting the molten aluminum into a heat preservation furnace for sealing: preserving the heat of the molten pure aluminum water by using a heat preserving furnace and ventilating for 2-3 h;
s3: treating the die: coating different coatings and different coating thicknesses on the surface of the mold to adjust the cooling speed; the coating is selected from ZnO and talcum powder; coating ZnO on two ends of the mould, and coating talcum powder in the middle of the mould;
s4: pouring: pouring molten aluminum into a mold through an inclined gravity casting machine, and performing pressure solidification;
s5: demolding: cooling and shaping the aluminum water, and then demoulding to obtain a barrel body (1);
s6: and (3) welding the connecting piece (2) to the barrel (1), and cutting off part of the barrel wall of the barrel (1) along the axial direction.
2. The method of claim 1, wherein the pressure curing comprises the steps of:
a1: high-pressure solidification: applying high-pressure gas to the surface of the molten aluminum by a high-pressure gas pump at the moment of die assembly of the die, sequentially applying high pressures of 1-3S/0.5MPa, 3-4S/1MPa, 4-5S/2MPa and 5-10S/3MPa at the time of die assembly start, and sequentially solidifying the molten aluminum according to the sequential solidification principle;
a2: pressure maintaining solidification forming: and maintaining the pressure for 200s and 240s under the high pressure of 3MPa, so that the casting is fully pressurized, solidified and molded.
3. The method of claim 1, wherein the ZnO coating thickness of S3 is 0.3-0.6 mm.
4. The method of claim 1, wherein the thickness of the talc powder in S3 is maintained to be half of the ZnO coating thickness.
5. A method for manufacturing an aluminium tube for shock absorbers according to claim 1 characterized in that argon arc welding is used to weld the tube body (1) and the connecting piece (2).
6. The manufacturing method of an aluminum tube for shock absorber as set forth in claim 1, wherein the weld joint quality of the tube body (1) is non-destructively tested by fluorescence, X-ray or ultrasound, and the weld area without defects is stress-relieved annealed.
7. The manufacturing method of the aluminum cylinder for the shock absorber as claimed in claim 6, wherein the stress relief annealing process comprises: and (3) putting the welding seam area into an annular resistance furnace, raising the temperature of the annular resistance furnace from room temperature to 580-600 ℃, preserving the heat for 10min, raising the temperature from 580-600 ℃ to 890-930 ℃ at the speed of 10 ℃/min, preserving the heat for 30min, reducing the temperature from 890-930 ℃ to room temperature at the speed of 10 ℃/min, and taking out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111046304.8A CN113798445A (en) | 2021-09-08 | 2021-09-08 | Manufacturing method of aluminum cylinder of shock absorber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111046304.8A CN113798445A (en) | 2021-09-08 | 2021-09-08 | Manufacturing method of aluminum cylinder of shock absorber |
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| CN113798445A true CN113798445A (en) | 2021-12-17 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857768A (en) * | 2010-06-18 | 2010-10-13 | 上海纳米技术及应用国家工程研究中心有限公司 | Ultrasonically-modified nano heat-insulating powder coating for aluminum alloy section and method for preparing same |
| CN104550680A (en) * | 2015-01-01 | 2015-04-29 | 三峡大学 | Alcoholic-group coating |
| CN104624958A (en) * | 2013-11-06 | 2015-05-20 | 青岛齐力铸钢有限公司 | Aluminum alloy impeller centrifuge casting method |
| CN109280788A (en) * | 2018-11-28 | 2019-01-29 | 陕西宝锐金属有限公司 | A kind of technique preventing GH625 alloy pipe weld stress corrosion cracking |
| CN109773160A (en) * | 2019-03-29 | 2019-05-21 | 山东鸿源新材料有限公司 | The low-pressure casting process of aluminum alloy impeller |
| CN110512100A (en) * | 2019-09-06 | 2019-11-29 | 中北大学 | A kind of method of smelting of V-N steel pack alloy |
| CN112517890A (en) * | 2019-09-18 | 2021-03-19 | 台州市椒江炜城机械厂 | Manufacturing process of motorcycle shock absorber aluminum cylinder |
-
2021
- 2021-09-08 CN CN202111046304.8A patent/CN113798445A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857768A (en) * | 2010-06-18 | 2010-10-13 | 上海纳米技术及应用国家工程研究中心有限公司 | Ultrasonically-modified nano heat-insulating powder coating for aluminum alloy section and method for preparing same |
| CN104624958A (en) * | 2013-11-06 | 2015-05-20 | 青岛齐力铸钢有限公司 | Aluminum alloy impeller centrifuge casting method |
| CN104550680A (en) * | 2015-01-01 | 2015-04-29 | 三峡大学 | Alcoholic-group coating |
| CN109280788A (en) * | 2018-11-28 | 2019-01-29 | 陕西宝锐金属有限公司 | A kind of technique preventing GH625 alloy pipe weld stress corrosion cracking |
| CN109773160A (en) * | 2019-03-29 | 2019-05-21 | 山东鸿源新材料有限公司 | The low-pressure casting process of aluminum alloy impeller |
| CN110512100A (en) * | 2019-09-06 | 2019-11-29 | 中北大学 | A kind of method of smelting of V-N steel pack alloy |
| CN112517890A (en) * | 2019-09-18 | 2021-03-19 | 台州市椒江炜城机械厂 | Manufacturing process of motorcycle shock absorber aluminum cylinder |
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Application publication date: 20211217 |