CN109402424A - Copper and the high temperature alloy plug of copper alloy and preparation method thereof are rolled applied to planetary rolling - Google Patents
Copper and the high temperature alloy plug of copper alloy and preparation method thereof are rolled applied to planetary rolling Download PDFInfo
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- CN109402424A CN109402424A CN201811484668.2A CN201811484668A CN109402424A CN 109402424 A CN109402424 A CN 109402424A CN 201811484668 A CN201811484668 A CN 201811484668A CN 109402424 A CN109402424 A CN 109402424A
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- high temperature
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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
- C22C1/023—Alloys based on nickel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
-
- 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
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
- C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
- C23C10/48—Aluminising
Abstract
Copper and the high temperature alloy plug of copper alloy and preparation method thereof are rolled applied to planetary rolling the present invention relates to a kind of, belongs to metal working technical area.It include Cr 11.50%-14.00%, Mo 3.80%-5.2%, Al 5.50%-6.50%, Ti 0.50%-1.00%, Nb+Ta 1.80-2.80%, B 0.005-0.020%, C 0.08%-0.20%, Zr 0.050%-0.20%, Si≤0.50%, Mn≤0.50%, P≤0.015%, S≤0.015%, Fe≤2.50%, remaining be Ni.Preparation process of the present invention is that vacuum induction melting prepares mother alloy ingot, vacuum induction remelting, high temperature alloy plug blank is prepared out by model casting, blank is subjected to hip treatment and then heat treatment, then polishing finishing is carried out, plug is finally subjected to alitizing processing to increase the corrosion resistance under surface hardness and high temperature.It is high that the present invention prepares gained high temperature alloy plug comprehensive mechanical property with higher, fatigue life height, elevated temperature strength, hence it is evident that improves the service life of mold, and preparation process is simple, process is short.
Description
Technical field
Copper and the high temperature alloy plug of copper alloy and preparation method thereof are rolled applied to planetary rolling the present invention relates to a kind of,
Belong to metal working technical area.
Background technique
Three-roller planetary rolling mill rolls hollow copper and copper alloy ingot technology is efficiently to prepare the technical side of copper and copper-alloy pipe-material
Method.Statistics copper-alloy pipe-material technology is prepared compared to hot extrusion method, planetary rolling rolls hollow copper ingot technology and has the advantage that
(1) lumber recovery is high；(2) production efficiency significantly improves；(3) production cost is low, and energy-saving effect is obvious；(4) short tube can be prepared, it is long
Pipe and small, Kinds of Heavy Coil copper and copper alloy tube.
However in the actual production process, planetary rolling rolling copper tube technique is mature, plug using H13 material and
Domestic Y4 material is able to satisfy requirement.And when rolling copper alloy, then to the more demanding of plug, more mature is to use
In the rolling of brass tube, but matched plug service life is still lower, and copper-alloy pipe-material other for White Copper Tubes etc.
Rolling plug then requires higher.The plug of the materials such as H13 and Y4 is in use since the operation of rolling generates a large amount of heat, temperature
Degree steeply rises, and causes plug outer surface copper easy to stick, and particularly when rolling copper alloy, due to rolling temperature height, viscous copper-base is
Seriously, it often rolls one just to need to carry out reconditioning to plug outer surface, has seriously affected production efficiency.And viscous copper position exactly rolls
At stress point, damage is more serious at the stress point, causes the reason of seriously damaging mainly to have: (1) during copper alloy mill
Temperature rise is very fast, and hardness of copper alloy and intensity are higher；(2) hardness under plug material high temperature is low；(3) fatigue behaviour under high temperature
Difference；(4) plug radiating efficiency is low.The service performance of plug directly influence drawn and rolled tube inner surface quality, rolling efficiency and
Rolling cost.
How to improve planetary rolling plug service life and service performance becomes raising production efficiency, lumber recovery and product matter
The key of amount.H13 mould steel by room temperature within the temperature range of 600 DEG C or so, yield strength, tensile strength, elasticity modulus
When approaching linear slow reduction as the temperature increases, and being higher than 600 DEG C or so, intensity and toughness rapid decrease lose and hold
Loading capability.How to find out and a kind of be more suitable for preparing copper and the planetary rolling plug of copper alloy and become urgent problem to be solved.
Summary of the invention
The purpose of the present invention is being to overcome above-mentioned shortcoming, one kind is provided and is applied to planetary rolling rolling copper and copper conjunction
High temperature alloy plug of ingot and preparation method thereof uses stable mechanical property under a kind of high temperature, excellent, has high fatigue
Service life, the higher planetary rolling plug of heat transfer efficiency in the operation of rolling.
Technical solution of the present invention rolls the high temperature alloy plug of copper and copper alloy applied to planetary rolling, by quality hundred
Divide than calculating: including Cr 11.50%-14.00%, Mo 3.80%-5.2%, Al 5.50%-6.50%, Ti 0.50%-1.00%, Nb+
Ta 1.80-2.80%, Si≤0.50%, Mn≤0.50%, P≤0.015%, S≤0.015%, Fe≤2.50%, remaining be Ni.
It is as follows that wherein microelement is controlled by mass percentage: B 0.005-0.020%, C 0.08%-0.20%, Zr
0.050%-0.20%。
The high temperature alloy plug of copper and copper alloy, including calibrating strap, guide cone, external screw thread are rolled applied to planetary rolling,
Cooling hole and internal screw thread；The calibrating strap front end is equipped with guide cone, and end is equipped with external screw thread；Cooling is equipped with inside the calibrating strap
Hole is equipped with internal screw thread along cooling hole.
The external screw thread is round thread, and the diameter of the round thread is less than the diameter of calibrating strap.
The calibrating strap center 2-4cm length wall thickness not machining internal thread.
Its sizing strip length of plug provided by the invention is 145-155mm, round thread part 30-40mm and truncated cone-shaped
It is oriented to wimble fraction 10-20mm, cooling hole is as shown in Figure 1 through whole plug.The cooling hole surface of plug is machined with internal screw thread, increases
Heat dissipation in the operation of rolling, to increase the service life of plug.Plug calibrating strap center 2-4cm length wall thickness not
Machining internal thread.
Plug provided by the invention is used in the copper ingot of various copper and copper alloy to the rolling of tubing.And surface is impregnated with one
Layer protective coating, to increase the hardness, service performance and service life of plug.
The preparation method of the high temperature alloy plug of copper and copper alloy is rolled applied to planetary rolling, steps are as follows:
(1) vacuum induction melting: first by plug at being grouped as carry out ingredient: Cr 11.50%-14.00%, Mo 3.80%-
5.2%、Al 5.50%-6.50%、Ti 0.50%-1.00%、Nb+Ta 1.80%-2.80%、Si≤0.50%、Mn≤0.50%、P≤
0.015%, S≤0.015%, Fe≤2.50%, remaining be Ni；Controlling microelement B is 0.005%-0.020%, C 0.08%-
0.20%, Zr 0.050%-0.20% is prepared into master alloy by vacuum induction melting, 1510-1530 DEG C of refining temperature, casts
Temperature is 1480-1500 DEG C, and melting vacuum degree is not higher than 5MPa, smelting time 0.5-1.5h；
(2) model casting: go riser, outer surface polishing scale removal as secondary smelting master alloy prepared by step (1)
Raw material carries out investment cast；It is cast in formwork through vacuum induction melting remelting, prepares the blank close to plug size, it is described
Formwork baking temperature is 850-1000 DEG C, keeps the temperature 3-5h；1510-1530 DEG C of refining temperature, cast temperature is 1430-1450 DEG C,
Melting vacuum degree is not higher than 5MPa, smelting time 15-30min；
(3) it is heat-treated: step (2) being prepared into resulting plug blank and carries out hot isostatic pressing and heat treatment；
(4) it finishes: being perforated to plug obtained by step (3), machining internal thread, outer surface are refined to size needed for plug；
(5) alitizing is handled: using powder packaging alitizing, the plug processed is packaged in diffusion in heat-resisting steel container
In penetration enhancer, leads to protective gas argon gas and carry out alumetizing process to get the height of copper and copper alloy is rolled in planetary rolling to products application
Temperature alloy plug.
Step (3) described heat treatment specifically: the temperature of hip treatment is 1210 DEG C, pressure 125-127MPa,
The processing time is 2-4h；Heat treatment is specially 1180 DEG C × 2h/AC+930 DEG C × 16h/AC.
Step (5) the aluminising processing specifically: do protective gas with argon gas, penetration enhancer adds 1%NH by 99%FeAl powder4Cl
Mixing composition keeps the temperature 5-10h at 700-850 DEG C.
Beneficial effects of the present invention: the high temperature alloy core provided by the invention that copper and copper alloy are rolled applied to planetary rolling
Stick, elevated temperature strength height, good toughness, fatigue at high temperature performance is good, the threaded heat dissipation of boring.Heat dissipation performance is good in the operation of rolling
Good, when especially rolling copper alloy tube, plug glues copper phenomenon and lacks, and drawn and rolled tube inner wall is high-quality, and the present invention prepares plug
It is greatly increased compared to other mold steel core bar service lifes.It is simultaneously the application cogging of high temperature alloy new markets.
High temperature alloy plug prepared by the present invention can be prepared directly by model casting, embody the excellent of casting and forging
Gesture, while hip treatment and subsequent heat treatment are used, the plasticity and anti-fatigue performance of alloy, mandrel surface can be improved
Calorized coating increases the heat and corrosion resistant performance of plug at high temperature.Therefore high temperature alloy plug prepared by the present invention is in high temperature and pressure
There is down good comprehensive mechanical property, can be used for a long time at a temperature of 800 ~ 1050 DEG C, meet planetary rolling rolling copper and copper
Alloy, rolling temperature and the obdurability requirement of especially all kinds of copper alloys.It is short compared to extrusion process flow, prepare copper alloy
Tube efficiency is significantly increased with lumber recovery；Compared to the plug of traditional mould steel material, service life is traditional moulds steel
6-8 times of material plug, plug stress point position can be protected in long-time use process in plug outer surface and the operation of rolling
Hold it is smooth, glue copper phenomenon probability of occurrence it is small, the damage ratio of force part is substantially reduced, and is avoided and is often rolled a copper or copper alloy ingot
It just needs to carry out plug rubbing down processing once, and then significantly improves the service life and service performance of plug, improve pipe
The preparation efficiency of material.
Detailed description of the invention
Fig. 1 is high temperature alloy mandrel structure main view of the present invention.
Fig. 2 is Section A-A cross-sectional view of the present invention.
Fig. 3 high temperature alloy mandrel structure stereoscopic schematic diagram of the present invention.
Description of symbols: 1, calibrating strap；2, guide cone；3, external screw thread；4, cooling hole；5, internal screw thread.
Specific embodiment
Embodiment 1
Including calibrating strap 1, guide cone 2, external screw thread 3, cooling hole 4 and internal screw thread 5；1 front end of calibrating strap is equipped with guide cone 2,
End is equipped with external screw thread 3；It is equipped with cooling hole 4 inside the calibrating strap 1, is equipped with internal screw thread 5 along cooling hole 4.
Its sizing strip length of plug provided by the invention is 145-155mm, round thread part 30-40mm and truncated cone-shaped
It is oriented to wimble fraction 10-20mm, cooling hole is as shown in Figure 1 through whole plug.The cooling hole surface of plug is machined with internal screw thread, increases
Heat dissipation in the operation of rolling, to increase the service life of plug.Plug calibrating strap center 2-4cm length wall thickness not
Machining internal thread.
Plug provided by the invention is used in the copper ingot of various copper and copper alloy to the rolling of tubing.And surface is impregnated with one
Layer protective coating, to increase the hardness, service performance and service life of plug.
Embodiment 2
The preparation method of the high temperature alloy plug of copper and copper alloy is rolled applied to planetary rolling, steps are as follows:
(1) vacuum melting: by mass percentage, taking Cr 12.7%, Mo 4.5%, Al 6%, Ti 0.75%, Nb 2.3%, remaining
For Ni, and control microelement B 0.012%, C 0.14%, Zr 0.12% are added, not higher than melting under 5MPa vacuum degree, poured
Casting temperature is 1480 DEG C, prepares high temperature alloy master alloy；
(2) model casting: go riser, outer surface polishing scale removal as secondary smelting master alloy prepared by step (1)
Raw material carries out investment cast；It is cast in formwork through vacuum induction melting remelting, prepares the blank close to plug size, it is described
Formwork baking temperature is 850 DEG C, keeps the temperature 3h；1510 DEG C of refining temperature, cast temperature is 1430 DEG C, and melting vacuum degree is not higher than
5MPa, smelting time 30min；
(3) the prepared casting in step (4) hip treatment: is subjected to hip treatment, hip treatment
Technique are as follows: HIP(1210 DEG C, 126MPa, 3h)；
(4) casting after step (5) resulting hip treatment standard heat treatment: is subjected to standard heat treatment, standard hot
Treatment process are as follows: 1180 DEG C × 2h/AC+930 DEG C × 16h/AC；By gained heat treatment plug blank carry out machine outer surface vehicle light,
The connection end of polishing, central hole and machining internal thread, plug processes screw thread, and wherein calibrating strap centre 2cm is not processed
Screw thread.
(5) alitizing is handled: plug obtained by step (7) is subjected to alitizing processing, using powder packaging alitizing,
The plug processed is packaged in diffusion penetration enhancer in heat-resisting steel container, makees protective gas with argon gas, carries out aluminising processing.It seeps
Agent adds 1%NH by 99%FeAl alloyed powder4Cl mixing composition.
Embodiment 3
(1) vacuum melting: by weight percentage, taking Cr 12.5%, Mo 4.2%, Al 6.2%, Ti 0.8%, Nb 2.2%,
Remaining is Ni, remaining is Ni, and adds control microelement B 0.015%, C 0.12%, Zr 0.12%, is being not higher than 5MPa vacuum
Lower melting is spent, cast temperature is 1490 DEG C, prepares high temperature alloy master alloy；
(2) model casting: go riser, outer surface polishing scale removal as secondary smelting master alloy prepared by step (1)
Raw material carries out investment cast；It is cast in formwork through vacuum induction melting remelting, prepares the blank close to plug size, it is described
Formwork baking temperature is 1000 DEG C, keeps the temperature 3h；1530 DEG C of refining temperature, cast temperature is 1430 DEG C, and melting vacuum degree is not higher than
5MPa, smelting time 20min；
(3) the prepared casting in step (4) hip treatment: is subjected to hip treatment, hip treatment
Technique are as follows: HIP(1210 DEG C, 126MPa, 3h)；
(4) casting after step (5) resulting hip treatment standard heat treatment: is subjected to standard heat treatment, standard hot
Treatment process are as follows: 1180 DEG C × 2h/AC+930 DEG C × 16h/AC；
(5) heat treatment plug blank obtained by step (6) machining of plug finished product: is subjected to machine outer surface vehicle light, polishing, center
It perforates and machining internal thread, the connection end of plug processes screw thread, wherein calibrating strap centre 3cm does not process screw thread.
Plug obtained by step (7) is subjected to alitizing processing, it, will in heat-resisting steel container using powder packaging alitizing
The plug processed is packaged in diffusion penetration enhancer, is made protective gas with argon gas, is carried out aluminising processing.Penetration enhancer is by 99%FeAl alloy
Powder adds 1%NH4Cl mixing composition.
Embodiment 4
(1) vacuum melting: by mass percentage, taking Cr 12.8%, Mo 4.1%, Al 5.8%, Ti 0.8%, Nb 2.0%,
Remaining is Ni, and adds control microelement B 0.010%, C 0.09%, Zr 0.08%, the melting in the case where being not higher than 5MPa vacuum degree,
Cast temperature is 1500 DEG C, prepares high temperature alloy master alloy；
(2) model casting: go riser, outer surface polishing scale removal as secondary smelting master alloy prepared by step (1)
Raw material carries out investment cast；It is cast in formwork through vacuum induction melting remelting, prepares the blank close to plug size, it is described
Formwork baking temperature is 900 DEG C, keeps the temperature 4h；1520 DEG C of refining temperature, cast temperature is 1440 DEG C, and melting vacuum degree is not higher than
5MPa, smelting time 30min；
(3) it is heat-treated:
Hip treatment: prepared casting is subjected to hip treatment, hip treatment technique are as follows: HIP(1210
DEG C, 126MPa, 3h)；
Standard heat treatment: the casting after resulting hip treatment is subjected to standard heat treatment, standard heat treatment technique are as follows:
1180℃×2h/AC+930℃×16h/AC；
(4) it finishes: gained heat treatment plug blank the machining of plug finished product: being subjected to machine outer surface vehicle light, polishing, center
It perforates and machining internal thread, the connection end of plug processes screw thread, wherein calibrating strap centre 4cm does not process screw thread.
(5) alitizing is handled: alitizing processing: gained plug being carried out alitizing processing, using powder packaging
The plug processed, is packaged in diffusion penetration enhancer by alitizing in heat-resisting steel container, makees protective gas with argon gas, carries out aluminising
Processing.Penetration enhancer adds 1%NH by 99%FeAl alloyed powder4Cl mixing composition.
Claims (8)
1. it is applied to the high temperature alloy plug of planetary rolling rolling copper and copper alloy, it is characterized in that by mass percentage, proportion
It is as follows: including Cr 11.50%-14.00%, Mo 3.80%-5.2%, Al 5.50%-6.50%, Ti 0.50%-1.00%, Nb+Ta
1.80%-2.80%, Si≤0.50%, Mn≤0.50%, P≤0.015%, S≤0.015% and Fe≤2.50%, remaining is Ni.
2. as described in claim 1 applied to planetary rolling rolling copper and the high temperature alloy plug of copper alloy, it is characterized in that: also wrapping
Microelement is included, it is as follows to control microelement by mass percentage: B 0.005%-0.020%, C 0.08%-0.20% and Zr
0.050%-0.20%。
3. as described in claim 1 applied to planetary rolling rolling copper and the high temperature alloy plug of copper alloy, it is characterized in that: including
Calibrating strap (1), guide cone (2), external screw thread (3), cooling hole (4) and internal screw thread (5)；Calibrating strap (1) front end is equipped with guiding
It bores (2), end is equipped with external screw thread (3)；Cooling hole (4) are equipped with inside the calibrating strap (1), are equipped with interior spiral shell along cooling hole (4)
Line (5).
4. as claimed in claim 3 applied to planetary rolling rolling copper and the high temperature alloy plug of copper alloy, it is characterized in that: described
External screw thread (3) is round thread, and the diameter of the round thread is less than the diameter of calibrating strap (1).
5. as claimed in claim 3 applied to planetary rolling rolling copper and the high temperature alloy plug of copper alloy, it is characterized in that: described
Calibrating strap (1) center 2-4cm length wall thickness not machining internal thread (5).
6. it is applied to the preparation method of the high temperature alloy plug of planetary rolling rolling copper and copper alloy described in claim 1, it is special
Sign is that steps are as follows:
(1) vacuum induction melting: first by plug at being grouped as carry out ingredient: Cr 11.50%-14.00%, Mo 3.80%-
5.2%、Al 5.50%-6.50%、Ti 0.50%-1.00%、Nb+Ta 1.80%-2.80%、Si≤0.50%、Mn≤0.50%、P≤
0.015%, S≤0.015%, Fe≤2.50%, remaining be Ni；Controlling microelement B is 0.005%-0.020%, C 0.08%-
0.20%, Zr 0.050%-0.20% is prepared into master alloy by vacuum induction melting, 1510-1530 DEG C of refining temperature, casts
Temperature is 1480-1500 DEG C, and melting vacuum degree is not higher than 5MPa, smelting time 0.5-1.5h；
(2) model casting: go riser, outer surface polishing scale removal as secondary smelting master alloy prepared by step (1)
Raw material carries out investment cast；It is cast in formwork through vacuum induction melting remelting, prepares the blank close to plug size, it is described
Formwork baking temperature is 850-1000 DEG C, keeps the temperature 3-5h；1510-1530 DEG C of refining temperature, cast temperature is 1430-1450 DEG C,
Melting vacuum degree is not higher than 5MPa, smelting time 15-30min；
(3) it is heat-treated: step (2) being prepared into resulting plug blank and carries out hot isostatic pressing and heat treatment；
(4) it finishes: being perforated to plug obtained by step (3), machining internal thread, outer surface are refined to size needed for plug；
(5) alitizing is handled: using powder packaging alitizing, the plug processed is packaged in diffusion in heat-resisting steel container
In penetration enhancer, leads to protective gas argon gas and carry out alumetizing process to get the height of copper and copper alloy is rolled in planetary rolling to products application
Temperature alloy plug.
7. the preparation method applied to planetary rolling rolling copper and the high temperature alloy plug of copper alloy as claimed in claim 6,
It is characterized in step (3) described heat treatment specifically: the temperature of hip treatment is 1210 DEG C, pressure 125-127MPa, place
The reason time is 2-4h；Heat treatment is specially 1180 DEG C × 2h/AC+930 DEG C × 16h/AC.
8. the preparation method applied to planetary rolling rolling copper and the high temperature alloy plug of copper alloy as claimed in claim 6,
It is characterized in: step (5) the aluminising processing specifically: do protective gas with argon gas, penetration enhancer adds 1%NH by 99%FeAl powder4Cl
Mixing composition keeps the temperature 5-10h at 700-850 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811484668.2A CN109402424B (en) | 2018-12-06 | 2018-12-06 | High-temperature alloy core rod applied to rolling copper and copper alloy by planetary rolling mill and preparation method thereof |
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| CN201811484668.2A CN109402424B (en) | 2018-12-06 | 2018-12-06 | High-temperature alloy core rod applied to rolling copper and copper alloy by planetary rolling mill and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112296122A (en) * | 2020-10-14 | 2021-02-02 | 江苏隆达超合金股份有限公司 | Manufacturing process of high-efficiency tube made of high-fin cupronickel alloy |
| CN113369826A (en) * | 2021-06-30 | 2021-09-10 | 福建紫金铜业有限公司 | Production process of copper pipe for pier mouth |
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| CN113369826A (en) * | 2021-06-30 | 2021-09-10 | 福建紫金铜业有限公司 | Production process of copper pipe for pier mouth |
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