CN106424628A - Automatic continuous centrifugal casting production process - Google Patents
Automatic continuous centrifugal casting production process Download PDFInfo
- Publication number
- CN106424628A CN106424628A CN201611062379.4A CN201611062379A CN106424628A CN 106424628 A CN106424628 A CN 106424628A CN 201611062379 A CN201611062379 A CN 201611062379A CN 106424628 A CN106424628 A CN 106424628A
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- CN
- China
- Prior art keywords
- base metal
- metal cylinder
- automatic continuous
- spun casting
- continuous production
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009750 centrifugal casting Methods 0.000 title abstract description 14
- 238000004519 manufacturing process Methods 0.000 title abstract description 14
- 239000010953 base metal Substances 0.000 claims abstract description 101
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000010791 quenching Methods 0.000 claims abstract description 11
- 230000000171 quenching effect Effects 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims description 43
- 238000010924 continuous production Methods 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 229910045601 alloy Inorganic materials 0.000 claims description 17
- 239000000956 alloy Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 3
- 238000010257 thawing Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000001569 carbon dioxide Substances 0.000 claims description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000011819 refractory material Substances 0.000 claims description 2
- 230000005484 gravity Effects 0.000 abstract 2
- 238000005111 flow chemistry technique Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 230000006698 induction Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/06—Melting-down metal, e.g. metal particles, in the mould
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
Abstract
The invention provides an automatic continuous centrifugal casting production process. The automatic continuous centrifugal casting production process is characterized in that sealed base metal barrels which are filled with casted materials are subjected to continuous centrifugal casting; the sealed base metal barrels which are sequentially arranged are continuously and automatically fed or pushed one by one in a heating furnace; when the centrifugal casting temperature is reached, each sealed base metal barrel is removed from the heating furnace and then slides on a rotating wheel set through a slope under the effect of own gravity; after being rotated to achieve the centrifugal casting effect, each sealed base metal barrel is immediately cooled to reach the set temperature so as to finish quenching; after being propped out, each sealed base metal barrel slides to a moving trolley or a conveyor belt through the slope under the effect of own gravity or is clamped to the moving trolley or the conveyor belt through a manipulator in order to be processed; meanwhile, the following base metal barrel removed from the heating furnace rightly slides to the rotating wheel set to be rotated to achieve the centrifugal casting; sealing ends at two ends of each base metal barrel are opened for rough and precise processing, and the processing is continuously carried out in the same way. With the adoption of the process, the automatic continuous centrifugal casting production and flow processing can be achieved; the production efficiency can be improved; the labor and materials can be saved; the production cost is reduced; the product quality is ensured.
Description
Technical field
The present invention relates to a kind of spun casting technique, more particularly, to spun casting automatic continuous production technique.
Background technology
Spun casting is a kind of ripe casting process, is the method using the hollow tubular article of centrifugal forming.Centrifugation
Casting may be utilized in fabricating base steel bimetallic tubular article, such as number of patent application 2016106952267 closed type centrifugal casting method,
Disclose base steel bimetallic tubular article and obtain the double gold of base steel for manufacturing bimetal sliding bearing using centrifugal casting process
Belong to tubular article.As long as the metal or alloy of casting is loaded in base metal cylinder with the state of solid-state at normal temperatures；It is filled with guarantor
After shield gas, the two ends of base metal cylinder are all closed；This base metal cylinder is heated up to more than interior metal or the fusing point of alloy,
Then spun casting is done in rotation, makes the solution of metal or alloy in base metal cylinder uniformly be fixed on the inwall of base metal cylinder
On；After cooling, open the lid of closed at both ends, after Surface Machining, be the bimetallic cylinder product cast.Although this technique is relatively
Solve the problems, such as well the spun casting of the base steel bimetallic tubular article for manufacturing bimetal sliding bearing.But for large quantities of
Amount produces bimetallic bearing and also needs to consider further seriality and the improve production efficiency of the whole technological process of production, in this side
Face also has to be solved and improves.
Content of the invention
The purpose of the present invention is on the basis of existing closed type centrifugal casting method, in conjunction with spun casting and heat treatment work
Skill, solves the problems, such as the centrifugally cast continuous production of base steel bimetallic tubular article of bimetal sliding bearing.
In order to achieve the above object, a kind of spun casting automatic continuous production technique of the present invention, its feature is successively：
（1）Prepare round tubular base metal cylinder；
（2）One end with end cap closed base metal cylinder；
（3）Metal or alloy to be cast at normal temperatures with the base metal cylinder of solid-state like loading one end closing；
（4）It is filled with protective gas in base metal cylinder；
（5）With the other end of end cap closed base metal cylinder so that base metal cylinder is hermetic container；
（6）Tandem closed base metal cylinder by continuous automatic feed one by one or advances stove heat of heating, plus
Hot substrate metal cylinder, to more than the fusing point of interior metal or alloy, makes the metal or alloy in base metal cylinder melt completely；
（7）The fire door base metal cylinder that goes out to heat slides in rotating wheel group by means of slope by self gravitation, or clips to rotation by mechanical hand
In wheel group, immediately press centrifugally cast rotating speed, time, by base metal cylinder rotate, carry out spun casting, make thawing metal or
Alloy is uniformly adhered on the inwall of base metal cylinder；
（8）Continue under rotation in base metal cylinder, be situated between according to the hardening heat of base metal cylinder material, rate of cooling, cooling
The quenching technical of matter requires, and controls the quick cooling of base metal cylinder, reaches the effect of quenching；
（9）After the completion of quenching, base metal cylinder leans on self gravitation, by means of slope sliding or by mechanical hand, base metal collet chuck is arrived movable
Product processing is sent on dolly or conveyer belt；
（10）Meanwhile, below, a base metal cylinder having gone out stove also completes to heat, and starts above-mentioned（7）Spun casting work
Sequence, from（7）Arrive（9）There are 2-10 minutes in this cycle；
（11）Open the capping at base metal cylinder two ends with cutting machine or stock-removing machine；
（12）Processing base metal cylinder, outer surface, become bimetallic cylinder product.
The material of described base metal cylinder is steel.
The material of described base metal cylinder is No. 40 steel or No. 45 steel.
The alloy of described casting is copper alloy.
Described copper alloy is CuSn5Zn5Pb5 or CuZn25Al6Fe3Mn3 or CuSn12.
Described base metal cylinder is connected with the connection welding of end cap or refractory material adhesive.
The described protective gas being filled with is argon or carbon dioxide or nitrogen.
Described base metal cylinder by continuous automatic feed one by one or advances stove heat of heating to be to adopt conveyer belt
Or advance pot arch with hydraulic cylinder or pneumatic cylinder.
Described pot arch is induction heater or tubular heater.
Described spun casting, the rotating speed of its base metal cylinder is 50 revs/min to 5000 revs/min.
Described cooling medium is air or water or oil.
Described quick cooling is the temperature being cooled fast to a setting, and the temperature that this sets is as 100 DEG C to 500 DEG C.
Described bimetallic cylinder product, the short cylinder product of the two or more bimetallic of cleaved one-tenth.
According to above-mentioned spun casting automatic continuous production technique, except the bimetallic spun casting of base steel and quick cooling
It is achieved that the continuous centrifugal casting production line of automatization outside simultaneous quenching technical is had the advantage that, improve production efficiency,
Save manpower and material, also ensure that the environmental condition concordance of before and after's production while reducing production cost, effectively
Ensure that quality and its stability of product.
Brief description
Fig. 1 is spun casting automatic continuous production process route chart.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings and by embodiment.
Fig. 1 is the process route chart of spun casting automatic continuous production technique.As seen from the figure, spun casting of the present invention
Automatic continuous production technique is as follows：
（1）Prepare round tubular base metal cylinder；
（2）One end with end cap closed base metal cylinder；
（3）Metal or alloy to be cast at normal temperatures with the base metal cylinder of solid-state like loading one end closing；
（4）It is filled with protective gas in base metal cylinder；
（5）With the other end of end cap closed base metal cylinder so that base metal cylinder is hermetic container；
（6）Tandem closed base metal cylinder by continuous automatic feed one by one or advances stove heat of heating, plus
Hot substrate metal cylinder, to more than the fusing point of interior metal or alloy, makes the metal or alloy in base metal cylinder melt completely；
（7）The fire door base metal cylinder that goes out to heat slides in rotating wheel group by means of slope by self gravitation, or clips to rotation by mechanical hand
In wheel group, immediately press centrifugally cast rotating speed, time, by base metal cylinder rotate, carry out spun casting, make thawing metal or
Alloy is uniformly adhered on the inwall of base metal cylinder；
（8）Continue under rotation in base metal cylinder, be situated between according to the hardening heat of base metal cylinder material, rate of cooling, cooling
The quenching technical of matter requires, and controls the quick cooling of base metal cylinder, reaches the effect of quenching；
（9）After the completion of quenching, base metal cylinder leans on self gravitation, by means of slope sliding or by mechanical hand, base metal collet chuck is arrived movable
Product processing is sent on dolly or conveyer belt；
（10）Meanwhile, below, a base metal cylinder having gone out stove also completes to heat, and starts above-mentioned（7）Spun casting work
Sequence, from（7）Arrive（9）There are 2-10 minutes in this cycle；
（11）Open the capping at base metal cylinder two ends with cutting machine or stock-removing machine；
（12）Processing base metal cylinder, outer surface, become bimetallic cylinder product.
Embodiment 1
A. No. 40 base metal cylinders of 200 millimeters of tube length, 55 millimeters of footpath, 80 millimeters of external diameter are prepared, built with 764 gram weight
Bar-shaped or granular CuSn5Zn5Pb5 copper alloy, is filled with argon, and the two ends argon arc welding of base metal cylinder is closed；
B. continuous being heated in automatic pusher propulsion pot arch in turn of the base metal cylinder closed in tandem, heats
Stove is Medium Frequency Induction Heating Furnace；
C. the temperature in pot arch exit base metal cylinder reaches 1020 degree of spun casting temperature in degree Celsius；
D. after having gone out stove, base metal cylinder slides in rotating wheel group by means of slope by self gravitation；
E. do rotating centrifugal casting, the rotating speed of base metal cylinder is 720 revs/min；
F. continue to be quickly cooled to 380 degree Celsius with water under rotation in base metal cylinder；
G. cylinder slides on billy gate by means of slope by self gravitation, sends to Product processing；
H. simultaneously, the latter one base metal cylinder having gone out pot arch just slides in rotating wheel group again, has started next rotation
Turn spun casting. this cycle (C to G) about 4 minutes；
I. open the capping at base metal cylinder two ends with cutting machine, and this base metal cylinder is cut into three sections；
J. last Surface Machining, processes each centrifugally cast closed base metal cylinder through outer surface and produces three steel copper
Alloy bimetal cylinder product.
Embodiment 2
A. No. 45 base metal cylinders of 300 millimeters of tube length, 68 millimeters of footpath, 95 millimeters of external diameter are prepared, built with 1420 gram weight
Bar-shaped or granular CuZn25Al6Fe3Mn3 copper alloy, is filled with argon, and the two ends argon arc welding of base metal cylinder is closed；
B. continuous being heated in automatic pusher propulsion pot arch in turn of tandem closed base metal cylinder, heats
Stove is Medium Frequency Induction Heating Furnace；
C. the temperature in pot arch exit base metal cylinder reaches 1000 degree of spun casting temperature in degree Celsius；
D. after having gone out stove, base metal cylinder slides in rotating wheel group by means of slope by self gravitation；
E. do rotating centrifugal casting, the rotating speed of base metal cylinder is 600 revs/min；
F. continue to be quickly cooled to 400 degree Celsius with water under rotation in base metal cylinder；
G. base metal cylinder slides on billy gate by means of slope by self gravitation, sends to Product processing.；
H. simultaneously, the latter one base metal cylinder having gone out pot arch just slides in rotating wheel group again, has started next rotation
Spun casting. this cycle (C to G) about 4 minutes；
I. open the capping at base metal cylinder two ends with cutting machine, be cut into two-stage nitration by the waist；
J. last Surface Machining, processes each centrifugally cast closed base metal cylinder through outer surface and produces two steel copper
Alloy bimetal cylinder product.
Claims (13)
1. a kind of spun casting automatic continuous production technique, its feature is successively：
（1）Prepare round tubular base metal cylinder；
（2）One end with end cap closed base metal cylinder；
（3）Metal or alloy to be cast at normal temperatures with the base metal cylinder of solid-state like loading one end closing；
（4）It is filled with protective gas in base metal cylinder；
（5）With the other end of end cap closed base metal cylinder so that base metal cylinder is hermetic container；
（6）Tandem closed base metal cylinder by continuous automatic feed one by one or advances stove heat of heating, plus
Hot substrate metal cylinder, to more than the fusing point of interior metal or alloy, makes the metal or alloy in base metal cylinder melt completely；
（7）The fire door base metal cylinder that goes out to heat slides in rotating wheel group by means of slope by self gravitation, or clips to rotation by mechanical hand
In wheel group, immediately press centrifugally cast rotating speed, time, by base metal cylinder rotate, carry out spun casting, make thawing metal or
Alloy is uniformly adhered on the inwall of base metal cylinder；
（8）Continue under rotation in base metal cylinder, be situated between according to the hardening heat of base metal cylinder material, rate of cooling, cooling
The quenching technical of matter requires, and controls the quick cooling of base metal cylinder, reaches the effect of quenching；
（9）After the completion of quenching, base metal cylinder leans on self gravitation, by means of slope sliding or by mechanical hand, base metal collet chuck is arrived movable
Product processing is sent on dolly or conveyer belt；
（10）Meanwhile, below, a base metal cylinder having gone out stove also completes to heat, and starts above-mentioned（7）Spun casting work
Sequence, from（7）Arrive（9）There are 2-10 minutes in this cycle；
（11）Open the capping at base metal cylinder two ends with cutting machine or stock-removing machine；
（12）Processing base metal cylinder, outer surface, become bimetallic cylinder product.
2. spun casting automatic continuous production technique according to claim 1, is characterized in that described base metal cylinder
Material is steel.
3. spun casting automatic continuous production technique according to claim 2, is characterized in that described base metal cylinder
Material is No. 40 steel or No. 45 steel.
4. spun casting automatic continuous production technique according to claim 1, is characterized in that the alloy of described casting is
Copper alloy.
5. spun casting automatic continuous production technique according to claim 4, is characterized in that described copper alloy is
CuSn5Zn5Pb5 or CuZn25Al6Fe3Mn3 or CuSn12.
6. spun casting automatic continuous production technique according to claim 1, it is characterized in that described base metal cylinder with
The connection welding of end cap or refractory material adhesive connect.
7. spun casting automatic continuous production technique according to claim 1, it is characterized in that described in the protection that is filled with
Gas is argon or carbon dioxide or nitrogen.
8. spun casting automatic continuous production technique according to claim 1, is characterized in that described base metal cylinder quilt
Continuous automatic feed one by one or propulsion stove heat of heating is to be added using conveyer belt or advanced with hydraulic cylinder or pneumatic cylinder
Warm stove.
9. spun casting automatic continuous production technique according to claim 1, is characterized in that described pot arch is sense
Answer heating furnace or tubular heater.
10. spun casting automatic continuous production technique according to claim 1, is characterized in that described spun casting,
The rotating speed of its base metal cylinder is 50 revs/min to 5000 revs/min.
11. spun casting automatic continuous production techniques according to claim 1, is characterized in that described cooling is situated between
Matter is air or water or oil.
12. spun casting automatic continuous production techniques according to claim 1, is characterized in that described quick cooling is
It is cooled fast to the temperature of a setting, the temperature that this sets is as 100 DEG C to 500 DEG C.
13. spun casting automatic continuous production techniques according to claim 1, is characterized in that described bimetallic cylinder
Product, the short cylinder product of the two or more bimetallic of cleaved one-tenth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611062379.4A CN106424628B (en) | 2016-11-23 | 2016-11-23 | Centrifugal casting automatic continuous production technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611062379.4A CN106424628B (en) | 2016-11-23 | 2016-11-23 | Centrifugal casting automatic continuous production technique |
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| Publication Number | Publication Date |
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| CN106424628A true CN106424628A (en) | 2017-02-22 |
| CN106424628B CN106424628B (en) | 2019-04-30 |
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Family Applications (1)
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|---|---|---|---|
| CN201611062379.4A Active CN106424628B (en) | 2016-11-23 | 2016-11-23 | Centrifugal casting automatic continuous production technique |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108031810A (en) * | 2017-11-27 | 2018-05-15 | 宁波江北珂达汽车技术有限公司 | The casting method of tubing workpiece |
| CN108237213A (en) * | 2017-12-29 | 2018-07-03 | 上海天阳钢管有限公司 | A kind of process for manufacturing bimetallic composite bearing blank |
| CN112570688A (en) * | 2020-11-11 | 2021-03-30 | 中北大学 | Solid-liquid forming steel-copper bimetallic material heat treatment method |
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|---|---|---|---|---|
| US4573523A (en) * | 1984-11-05 | 1986-03-04 | Hatch Associates Ltd. | Method of and apparatus for continuous centrifugal casting |
| CN101104203A (en) * | 2006-07-10 | 2008-01-16 | 徐明良 | Method for manufacturing bimetallic barrel |
| JP2012110956A (en) * | 2010-11-26 | 2012-06-14 | Nagoya Institute Of Technology | Method for producing cylindrically-shaped casting |
| CN102747365A (en) * | 2012-06-20 | 2012-10-24 | 北京科技大学 | Preparation method for steel pipe having wear-resistant and corrosion-resistant lining layer |
| CN203697335U (en) * | 2014-01-26 | 2014-07-09 | 株洲海天工程塑料实业有限公司 | Continuous centrifugal casting production device for MC nylon |
| CN105149554A (en) * | 2015-09-09 | 2015-12-16 | 安徽省凯峰塑料机械有限公司 | Process for processing seamless steel pipe for plastic machinery |
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2016
- 2016-11-23 CN CN201611062379.4A patent/CN106424628B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4573523A (en) * | 1984-11-05 | 1986-03-04 | Hatch Associates Ltd. | Method of and apparatus for continuous centrifugal casting |
| CN101104203A (en) * | 2006-07-10 | 2008-01-16 | 徐明良 | Method for manufacturing bimetallic barrel |
| JP2012110956A (en) * | 2010-11-26 | 2012-06-14 | Nagoya Institute Of Technology | Method for producing cylindrically-shaped casting |
| CN102747365A (en) * | 2012-06-20 | 2012-10-24 | 北京科技大学 | Preparation method for steel pipe having wear-resistant and corrosion-resistant lining layer |
| CN203697335U (en) * | 2014-01-26 | 2014-07-09 | 株洲海天工程塑料实业有限公司 | Continuous centrifugal casting production device for MC nylon |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108031810A (en) * | 2017-11-27 | 2018-05-15 | 宁波江北珂达汽车技术有限公司 | The casting method of tubing workpiece |
| CN108031810B (en) * | 2017-11-27 | 2019-06-14 | 宁波江北珂达汽车技术有限公司 | The casting method of tubing workpiece |
| CN108237213A (en) * | 2017-12-29 | 2018-07-03 | 上海天阳钢管有限公司 | A kind of process for manufacturing bimetallic composite bearing blank |
| CN112570688A (en) * | 2020-11-11 | 2021-03-30 | 中北大学 | Solid-liquid forming steel-copper bimetallic material heat treatment method |
| CN112570688B (en) * | 2020-11-11 | 2021-12-31 | 中北大学 | Solid-liquid forming steel-copper bimetallic material heat treatment method |
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| CN106424628B (en) | 2019-04-30 |
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Address after: No.18, Hongwei North Road, ganyao Town, Jiashan County, Jiaxing City, Zhejiang Province Patentee after: Shuangfei Oil Free Bearing Group Co.,Ltd. Address before: No.18, Hongwei North Road, ganyao Town, Jiashan County, Jiaxing City, Zhejiang Province Patentee before: ZHEJIANG SF OILLESS BEARING Co.,Ltd. |
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