CN106756209A - A kind of high intensity wheel hub founding materials and its casting technique - Google Patents
A kind of high intensity wheel hub founding materials and its casting technique Download PDFInfo
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- CN106756209A CN106756209A CN201611143207.XA CN201611143207A CN106756209A CN 106756209 A CN106756209 A CN 106756209A CN 201611143207 A CN201611143207 A CN 201611143207A CN 106756209 A CN106756209 A CN 106756209A
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- wheel hub
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- founding materials
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Heat Treatment Of Articles (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a kind of high intensity wheel hub founding materials and its casting technique, the prescription quality part of the high intensity wheel hub founding materials is as follows：0.1 0.2 parts of carbon, 0.3 0.5 parts of silicon, 8 12 parts of chromium, 12 parts of manganese, 18 24 parts of iron, 0.5 0.7 parts of titanium, 0.1 0.3 parts of zinc, 50 60 parts of copper, 46 parts of nickel.A kind of high intensity wheel hub founding materials and its casting technique that the present invention is provided, the present invention substantially increase the intensity of wheel hub by the metal such as addition chromium, manganese, titanium in the feed, and with proportional, and process precise control of temperature ensures wheel hub quality.
Description
Technical field
The invention belongs to equipment manufacturing field, more specifically, more particularly to a kind of high intensity wheel hub founding materials.Together
When, the invention further relates to a kind of casting technique of high intensity wheel hub founding materials.
Background technology
Wheel hub is one of most important breaking piece on automobile, have steel wheel hub and aluminum wheel hub point, wheel hub subjects
The pressure of automobile and loading mass action, by vehicle, when starting, braking, dynamic torque is acted on, also subject to automobile in traveling
During turning, concave-convex road surface, road obstacle impact etc. from different directions dynamic load produce irregular alternation stress.
The q＆r of wheel hub is not only related to the security of vehicle and passengers inside the car's goods and materials, also affects vehicle under steam
The performances such as stationarity, maneuverability, comfortableness, this requires that wheel hub dynamic-balance is good, fatigue strength is high, the rigidity that has had and elasticity,
Size and dimension high precision, light weight etc., aluminium wheels meet above-mentioned requirements with its good combination property, in security, relax
The aspect such as adaptive and lightweight is had outstanding performance, and has won market favor, is just progressively replacing steel wheel hub to turn into optimal selection.
The content of the invention
The invention aims to solve shortcoming present in prior art, and a kind of high intensity wheel hub for proposing casts
Material.
To achieve the above object, the present invention provides following technical scheme：A kind of high intensity wheel hub founding materials, the high intensity
The prescription quality part of wheel hub founding materials is as follows：Carbon 0.1-0.2 parts, silicon 0.3-0.5 parts, chromium 8-12 parts, manganese 1-2 parts, iron 18-24
Part, titanium 0.5-0.7 parts, zinc 0.1-0.3 parts, copper 50-60 parts, nickel 4-6 parts.
Preferably, the quality of chromium is 9-10 times of titanium quality in the formula of the high intensity wheel hub founding materials.
Preferably, the purity of the iron is not less than 99.7%.
The present invention also provides a kind of casting technique of high intensity wheel hub founding materials, comprises the following steps：
S1, casting prepare：By raw material according to carbon 0.1-0.2 parts, silicon 0.3-0.5 parts, chromium 8-12 parts, manganese 1-2 parts, iron 18-
24 parts, titanium 0.5-0.7 parts, zinc 0.1-0.3 parts, copper 50-60 parts, nickel 4-6 parts is weighed, and raw material is cleaned and air-dried, removal surface ash
Dirt and impurity, and clean the medium-frequency induction furnace that uses of casting, must not bring objectionable impurities into, after cleaning and dry up；
S2, smelting furnace preheating：Medium-frequency induction furnace is gradually heating to 140 DEG C with 18 DEG C/min, and keeps temperature 5-
8min；
S3, raw material melting：The raw material that will prepare in S1 is added in the medium-frequency induction furnace after preheating, keeps temperature during preheating
Degree 6-10min, then increases temperature with the speed of 26 DEG C/min, is warming up to 1300-1500 DEG C；
S4, casting prepare：Hub mold is cleaned up and dried first, then hub mold is heated to 500-700 DEG C；
S5, moulding by casting：Cast by the method for low pressure casting, lentamente to being passed through drying in medium-frequency induction furnace
Compressed air, air pressure is 0.08-0.15Mpa, and molten metal is acted on by gas pressure, from bottom to top along stalk and
Running gate system is full of hub mold die cavity；
S6, wheel hub depanning：Hub mold is gradually cooled to normal temperature, unsuitable too fast, the no more than 40 DEG C/min of cooling rate,
Prevent wheel hub too crisp；
S7, flash are repaired：The wheel hub of taking-up is placed under repair, Burr removal is removed；
S8, radiographic inspection：Using X-ray tube, 50mm can be penetrated with the aluminium alloy of higher level, and wheel hub can be clearly observed
It is interior with the presence or absence of shrinkage porosite, pin hole.
Preferably, sequentially add silicon, iron, titanium, zinc, copper, nickel in the S3 first, keep 5min, then sequentially add carbon,
Chromium, manganese, keep 6-10min.
Preferably, refined using the fixed conche of double gases after raw material melting in the S3, improved product matter
Amount.
Preferably, after carrying out radiographic inspection inspection, the wheel hub of passed examination is placed on carries out hot place in heat-treatment furnace
Reason, temperature uniformity, temperature difference≤± 5 DEG C, placement of the wheel hub in stove uses bin, and product is separated in case wheel hub becomes
Shape.
Preferably, application is carried out to the wheel hub after heat treatment, the corrosion resistance and aesthetic feeling of aluminium wheels is improved, in order to ensure applies
The quality of dress, production scene requires that cleaning is dustless, is sprayed using automatic spraying equipment, and the precision controlling of coating layer thickness is existed
10mm, and surface is uniform.
Technique effect of the invention and advantage：A kind of high intensity wheel hub founding materials and its founder that the present invention is provided
Skill, the present invention, with proportional, substantially increases the intensity of wheel hub by the metal such as addition chromium, manganese, titanium in the feed, processes
Process precise control of temperature ensures wheel hub quality.
Specific embodiment
It is clearly and completely described below in conjunction with the technical scheme in the embodiment of the present invention, it is clear that described reality
It is only a part of embodiment of the invention to apply example, rather than whole embodiments.Specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, the scope of protection of the invention is belonged to.
Embodiment 1
A kind of high intensity wheel hub founding materials, the prescription quality part of the high intensity wheel hub founding materials is as follows：0.1 part of carbon,
0.3 part of silicon, 8 parts of chromium, 1 part of manganese, 18 parts of iron, 0.5 part of titanium, 0.1 part of zinc, 50 parts of copper, 4 parts of nickel.
The quality of chromium is 9-10 times of titanium quality in the formula of the high intensity wheel hub founding materials.
The purity of the iron is not less than 99.7%.
A kind of casting technique of high intensity wheel hub founding materials according to claim 1, comprises the following steps：
S1, casting prepare：By raw material according to 0.1 part of carbon, 0.3 part of silicon, 8 parts of chromium, 1 part of manganese, 18 parts of iron, 0.5 part of titanium, zinc
0.1 part, 50 parts of copper, 4 parts of nickel is weighed, and raw material is cleaned and air-dried, and is removed surface dirt and impurity, and is cleaned casting and uses
Frequency electric induction furnace, must not bring objectionable impurities into, after cleaning and dry up；
S2, smelting furnace preheating：Medium-frequency induction furnace is gradually heating to 140 DEG C with 18 DEG C/min, and keeps temperature 5-
8min；
S3, raw material melting：The raw material that will prepare in S1 is added in the medium-frequency induction furnace after preheating, keeps temperature during preheating
Degree 6-10min, then increases temperature with the speed of 26 DEG C/min, is warming up to 1300-1500 DEG C；
S4, casting prepare：Hub mold is cleaned up and dried first, then hub mold is heated to 500-700 DEG C；
S5, moulding by casting：Cast by the method for low pressure casting, lentamente to being passed through drying in medium-frequency induction furnace
Compressed air, air pressure is 0.08-0.15Mpa, and molten metal is acted on by gas pressure, from bottom to top along stalk and
Running gate system is full of hub mold die cavity；
S6, wheel hub depanning：Hub mold is gradually cooled to normal temperature, unsuitable too fast, the no more than 40 DEG C/min of cooling rate,
Prevent wheel hub too crisp；
S7, flash are repaired：The wheel hub of taking-up is placed under repair, Burr removal is removed；
S8, radiographic inspection：Using X-ray tube, 50mm can be penetrated with the aluminium alloy of higher level, and wheel hub can be clearly observed
It is interior with the presence or absence of shrinkage porosite, pin hole.
Silicon, iron, titanium, zinc, copper, nickel are sequentially added in the S3 first, 5min is kept, carbon, chromium, manganese is then sequentially added,
Keep 6-10min.
Refined using the fixed conche of double gases after raw material melting in the S3, improve product quality.
After carrying out radiographic inspection inspection, the wheel hub of passed examination is placed in heat-treatment furnace and is heat-treated, furnace temperature is equal
Even property, temperature difference≤± 5 DEG C, placement of the wheel hub in stove uses bin, and product is separated in case wheel hub deforms.
Application is carried out to the wheel hub after heat treatment, the corrosion resistance and aesthetic feeling of aluminium wheels is improved, in order to ensure the matter of application
Amount, production scene requires that cleaning is dustless, is sprayed using automatic spraying equipment, by the precision controlling of coating layer thickness in 10mm,
And surface is uniform.
Embodiment 2
A kind of high intensity wheel hub founding materials, the prescription quality part of the high intensity wheel hub founding materials is as follows：0.15 part of carbon,
0.4 part of silicon, 10 parts of chromium, 1.5 parts of manganese, 21 parts of iron, 0.6 part of titanium, 0.2 part of zinc, 55 parts of copper, 5 parts of nickel.
The quality of chromium is 9-10 times of titanium quality in the formula of the high intensity wheel hub founding materials.
The purity of the iron is not less than 99.7%.
A kind of casting technique of high intensity wheel hub founding materials according to claim 1, comprises the following steps：
S1, casting prepare：By raw material according to 0.15 part of carbon, 0.4 part of silicon, 10 parts of chromium, 1.5 parts of manganese, 21 parts of iron, 0.6 part of titanium,
0.2 part of zinc, 55 parts of copper, 5 parts of nickel is weighed, raw material is cleaned and air-dried, and is removed surface dirt and impurity, and is cleaned casting and uses
Frequency electric induction furnace, must not bring objectionable impurities into, after cleaning and dry up；
S2, smelting furnace preheating：Medium-frequency induction furnace is gradually heating to 140 DEG C with 18 DEG C/min, and keeps temperature 5-
8min；
S3, raw material melting：The raw material that will prepare in S1 is added in the medium-frequency induction furnace after preheating, keeps temperature during preheating
Degree 6-10min, then increases temperature with the speed of 26 DEG C/min, is warming up to 1300-1500 DEG C；
S4, casting prepare：Hub mold is cleaned up and dried first, then hub mold is heated to 500-700 DEG C；
S5, moulding by casting：Cast by the method for low pressure casting, lentamente to being passed through drying in medium-frequency induction furnace
Compressed air, air pressure is 0.08-0.15Mpa, and molten metal is acted on by gas pressure, from bottom to top along stalk
Hub mold die cavity is full of with running gate system；
S6, wheel hub depanning：Hub mold is gradually cooled to normal temperature, unsuitable too fast, the no more than 40 DEG C/min of cooling rate,
Prevent wheel hub too crisp；
S7, flash are repaired：The wheel hub of taking-up is placed under repair, Burr removal is removed；
S8, radiographic inspection：Using X-ray tube, 50mm can be penetrated with the aluminium alloy of higher level, and wheel hub can be clearly observed
It is interior with the presence or absence of shrinkage porosite, pin hole.
Silicon, iron, titanium, zinc, copper, nickel are sequentially added in the S3 first, 5min is kept, carbon, chromium, manganese is then sequentially added,
Keep 6-10min.
Refined using the fixed conche of double gases after raw material melting in the S3, improve product quality.
After carrying out radiographic inspection inspection, the wheel hub of passed examination is placed in heat-treatment furnace and is heat-treated, furnace temperature is equal
Even property, temperature difference≤± 5 DEG C, placement of the wheel hub in stove uses bin, and product is separated in case wheel hub deforms.
Application is carried out to the wheel hub after heat treatment, the corrosion resistance and aesthetic feeling of aluminium wheels is improved, in order to ensure the matter of application
Amount, production scene requires that cleaning is dustless, is sprayed using automatic spraying equipment, by the precision controlling of coating layer thickness in 10mm,
And surface is uniform.
Embodiment 3
A kind of high intensity wheel hub founding materials, the prescription quality part of the high intensity wheel hub founding materials is as follows：0.2 part of carbon,
0.5 part of silicon, 12 parts of chromium, 2 parts of manganese, 24 parts of iron, 0.7 part of titanium, 0.3 part of zinc, 60 parts of copper, 6 parts of nickel.
The quality of chromium is 9-10 times of titanium quality in the formula of the high intensity wheel hub founding materials.
The purity of the iron is not less than 99.7%.
A kind of casting technique of high intensity wheel hub founding materials according to claim 1, comprises the following steps：
S1, casting prepare：By raw material according to 0.2 part of carbon, 0.5 part of silicon, 12 parts of chromium, 2 parts of manganese, 24 parts of iron, 0.7 part of titanium, zinc
0.3 part, 60 parts of copper, 6 parts of nickel is weighed, and raw material is cleaned and air-dried, and removes surface dirt and impurity, and clean the intermediate frequency that casting is used
Electric induction furnace, must not bring objectionable impurities into, after cleaning and dry up；
S2, smelting furnace preheating：Medium-frequency induction furnace is gradually heating to 140 DEG C with 18 DEG C/min, and keeps temperature 5-
8min；
S3, raw material melting：The raw material that will prepare in S1 is added in the medium-frequency induction furnace after preheating, keeps temperature during preheating
Degree 6-10min, then increases temperature with the speed of 26 DEG C/min, is warming up to 1300-1500 DEG C；
S4, casting prepare：Hub mold is cleaned up and dried first, then hub mold is heated to 500-700 DEG C；
S5, moulding by casting：Cast by the method for low pressure casting, lentamente to being passed through drying in medium-frequency induction furnace
Compressed air, air pressure is 0.08-0.15Mpa, and molten metal is acted on by gas pressure, from bottom to top along stalk and
Running gate system is full of hub mold die cavity；
S6, wheel hub depanning：Hub mold is gradually cooled to normal temperature, unsuitable too fast, the no more than 40 DEG C/min of cooling rate,
Prevent wheel hub too crisp；
S7, flash are repaired：The wheel hub of taking-up is placed under repair, Burr removal is removed；
S8, radiographic inspection：Using X-ray tube, 50mm can be penetrated with the aluminium alloy of higher level, and wheel hub can be clearly observed
It is interior with the presence or absence of shrinkage porosite, pin hole.
Silicon, iron, titanium, zinc, copper, nickel are sequentially added in the S3 first, 5min is kept, carbon, chromium, manganese is then sequentially added,
Keep 6-10min.
Refined using the fixed conche of double gases after raw material melting in the S3, improve product quality.
After carrying out radiographic inspection inspection, the wheel hub of passed examination is placed in heat-treatment furnace and is heat-treated, furnace temperature is equal
Even property, temperature difference≤± 5 DEG C, placement of the wheel hub in stove uses bin, and product is separated in case wheel hub deforms.
Application is carried out to the wheel hub after heat treatment, the corrosion resistance and aesthetic feeling of aluminium wheels is improved, in order to ensure the matter of application
Amount, production scene requires that cleaning is dustless, is sprayed using automatic spraying equipment, by the precision controlling of coating layer thickness in 10mm,
And surface is uniform.
In sum：The present invention provide a kind of high intensity wheel hub founding materials and its casting technique, the present invention by
The metals such as chromium, manganese, titanium are added in raw material, and with proportional, substantially increases the intensity of wheel hub, process precise control of temperature
Ensure wheel hub quality.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used
Modified with to the technical scheme described in foregoing embodiments, or equivalent carried out to which part technical characteristic,
All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in of the invention
Within protection domain.
Claims (8)
1. a kind of high intensity wheel hub founding materials, it is characterised in that：The prescription quality part of the high intensity wheel hub founding materials is as follows：
Carbon 0.1-0.2 parts, silicon 0.3-0.5 parts, chromium 8-12 parts, manganese 1-2 parts, iron 18-24 parts, titanium 0.5-0.7 parts, zinc 0.1-0.3 parts, copper
50-60 parts, nickel 4-6 parts.
2. a kind of high intensity wheel hub founding materials according to claim 1, it is characterised in that：The high intensity wheel hub casts material
The quality of chromium is 9-10 times of titanium quality in the formula of material.
3. a kind of high intensity wheel hub founding materials according to claim 1, it is characterised in that：The purity of the iron is not less than
99.7%.
4. the casting technique of a kind of high intensity wheel hub founding materials according to claim 1, it is characterised in that：Including as follows
Step：
S1, casting prepare：By raw material according to carbon 0.1-0.2 parts, silicon 0.3-0.5 parts, chromium 8-12 parts, manganese 1-2 parts, iron 18-24 parts,
Titanium 0.5-0.7 parts, zinc 0.1-0.3 parts, copper 50-60 parts, nickel 4-6 parts is weighed, and raw material is cleaned and air-dried, removal surface dirt and miscellaneous
Matter, and clean the medium-frequency induction furnace that uses of casting, must not bring objectionable impurities into, after cleaning and dry up；
S2, smelting furnace preheating：Medium-frequency induction furnace is gradually heating to 140 DEG C with 18 DEG C/min, and keeps temperature 5-8min；
S3, raw material melting：The raw material that will prepare in S1 is added in the medium-frequency induction furnace after preheating, keeps temperature 6- during preheating
10min, then increases temperature with the speed of 26 DEG C/min, is warming up to 1300-1500 DEG C；
S4, casting prepare：Hub mold is cleaned up and dried first, then hub mold is heated to 500-700 DEG C；
S5, moulding by casting：Cast by the method for low pressure casting, lentamente to being passed through dry pressure in medium-frequency induction furnace
Contracting air, air pressure is 0.08-0.15Mpa, and molten metal is acted on by gas pressure, from bottom to top along stalk and cast
System is full of hub mold die cavity；
S6, wheel hub depanning：Hub mold is gradually cooled to normal temperature, unsuitable too fast, the no more than 40 DEG C/min of cooling rate is prevented
Wheel hub is too crisp；
S7, flash are repaired：The wheel hub of taking-up is placed under repair, Burr removal is removed；
S8, radiographic inspection：Using X-ray tube, 50mm can be penetrated with the aluminium alloy of higher level, and can be clearly observed in wheel hub and be
It is no to there is shrinkage porosite, needle pore defect.
5. the casting technique of a kind of high intensity wheel hub founding materials according to claim 4, it is characterised in that：In the S3
Silicon, iron, titanium, zinc, copper, nickel are sequentially added first, 5min is kept, carbon, chromium, manganese is then sequentially added, and keep 6-10min.
6. the casting technique of a kind of high intensity wheel hub founding materials according to claim 4, it is characterised in that：In the S3
Refined using the fixed conche of double gases after raw material melting, improve product quality.
7. the casting technique of a kind of high intensity wheel hub founding materials according to claim 4, it is characterised in that：Carry out ray
After defect detecting test, the wheel hub of passed examination is placed in heat-treatment furnace and is heat-treated, temperature uniformity, temperature difference≤± 5
DEG C, placement of the wheel hub in stove uses bin, and product is separated in case wheel hub deforms.
8. the casting technique of a kind of high intensity wheel hub founding materials according to claim 7, it is characterised in that：To heat treatment
Wheel hub afterwards carries out application, improves the corrosion resistance and aesthetic feeling of aluminium wheels, and in order to ensure the quality of application, production scene requires clear
It is clean dustless, sprayed using automatic spraying equipment, by the precision controlling of coating layer thickness in 10mm, and surface is uniform.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107270597A (en) * | 2017-07-06 | 2017-10-20 | 苏州泰隆制冷有限公司 | A kind of fire-resistant high-performance copper-iron alloy reservoir |
| CN107287467A (en) * | 2017-07-06 | 2017-10-24 | 苏州泰隆制冷有限公司 | A kind of corrosion-resistant low temperature resistant copper-iron alloy reservoir |
| CN107794415A (en) * | 2017-11-14 | 2018-03-13 | 安徽福斯特汽车部件有限公司 | The high-strength vehicle aluminum wheel hub of light-weight design |
| CN107829056A (en) * | 2017-11-14 | 2018-03-23 | 安徽福斯特汽车部件有限公司 | A kind of high-intensity aluminium automotive hub |
| CN108044050A (en) * | 2017-11-15 | 2018-05-18 | 重庆嘉萌鸿业科技有限公司 | A kind of forming method of automobile water inlet bend pipe |
| CN108277369A (en) * | 2018-02-09 | 2018-07-13 | 兰州理工大学 | A kind of high duralumin, hard alumin ium alloy processing technology of lightweight |
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| CN107270597A (en) * | 2017-07-06 | 2017-10-20 | 苏州泰隆制冷有限公司 | A kind of fire-resistant high-performance copper-iron alloy reservoir |
| CN107287467A (en) * | 2017-07-06 | 2017-10-24 | 苏州泰隆制冷有限公司 | A kind of corrosion-resistant low temperature resistant copper-iron alloy reservoir |
| CN107794415A (en) * | 2017-11-14 | 2018-03-13 | 安徽福斯特汽车部件有限公司 | The high-strength vehicle aluminum wheel hub of light-weight design |
| CN107829056A (en) * | 2017-11-14 | 2018-03-23 | 安徽福斯特汽车部件有限公司 | A kind of high-intensity aluminium automotive hub |
| CN108044050A (en) * | 2017-11-15 | 2018-05-18 | 重庆嘉萌鸿业科技有限公司 | A kind of forming method of automobile water inlet bend pipe |
| CN108277369A (en) * | 2018-02-09 | 2018-07-13 | 兰州理工大学 | A kind of high duralumin, hard alumin ium alloy processing technology of lightweight |
| CN110076299A (en) * | 2019-05-10 | 2019-08-02 | 安徽永昌金属制品有限公司 | A kind of sand core wheel hub processing technology |
| CN110253238A (en) * | 2019-08-07 | 2019-09-20 | 苏州亚润精工科技有限公司 | A kind of imitative forged hub manufacturing process |
| CN111377043A (en) * | 2020-03-25 | 2020-07-07 | 安徽志恒智能装备制造有限公司 | Propeller casting process and propeller |
| CN112846105A (en) * | 2020-12-28 | 2021-05-28 | 镇江裕久智能装备股份有限公司 | Novel energy-saving hub casting process |
| CN114192755A (en) * | 2021-11-18 | 2022-03-18 | 保定市立中车轮制造有限公司 | Method for manufacturing hub of commercial vehicle |
| CN114192755B (en) * | 2021-11-18 | 2023-08-11 | 保定市立中车轮制造有限公司 | Manufacturing method of commercial vehicle hub |
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