CN110202019A - A kind of preparation method of bimetallic pipe billet and its prepare mold - Google Patents
A kind of preparation method of bimetallic pipe billet and its prepare mold Download PDFInfo
- Publication number
- CN110202019A CN110202019A CN201910592390.9A CN201910592390A CN110202019A CN 110202019 A CN110202019 A CN 110202019A CN 201910592390 A CN201910592390 A CN 201910592390A CN 110202019 A CN110202019 A CN 110202019A
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- extrusion
- pipe billet
- bimetallic
- mould
- bimetallic pipe
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- 238000002360 preparation method Methods 0.000 title claims abstract description 54
- 238000001125 extrusion Methods 0.000 claims abstract description 91
- 210000001161 mammalian embryo Anatomy 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 47
- 229910052751 metal Inorganic materials 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 42
- 150000002739 metals Chemical class 0.000 claims abstract description 10
- 210000002257 embryonic structure Anatomy 0.000 claims description 15
- 210000000981 epithelium Anatomy 0.000 claims description 15
- 230000003750 conditioning effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 230000002787 reinforcement Effects 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000005242 forging Methods 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 5
- 208000005168 Intussusception Diseases 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 7
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 238000005088 metallography Methods 0.000 abstract description 2
- 238000000641 cold extrusion Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/20—Making uncoated products by backward extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/22—Making metal-coated products; Making products from two or more metals
- B21C23/24—Covering indefinite lengths of metal or non-metal material with a metal coating
Abstract
The invention discloses a kind of preparation method of bimetallic pipe billet and its prepare mold, including bimetallic pipe billet forward extrusion preparation process and bimetallic pipe billet backward extrusion preparation process, bimetallic pipe billet forward extrusion preparation process prepares bimetal tube for tubular blank, and bimetallic pipe billet backward extrusion preparation process prepares bimetal tube for plate embryo material.A kind of preparation method of bimetallic pipe billet of the present invention and its prepare mold, bimetallic pipe billet squeezes preparation process by bimetallic pipe billet forward extrusion preparation process or bimetallic pipe billet anyway in the present invention, so that the contact interface of two kinds of metals is handled by high pressure and large deformation, reach Diffusion Welding state, from the point of view of metallography angle, the contact interface of dissimilar metal has been fused into one, the bimetallic precision seamless tubular goods for being squeezed or being drawn with such pipe, it is tightly combined between dissimilar metal, strong vibration and expanding with heat and contract with cold for high temperature variation cannot be such that bimetallic separates.
Description
Technical field
The present invention relates to Double-metal pipe production field, in particular to the preparation method and its preparation of a kind of bimetallic pipe billet
Mold.
Background technique
Double-metal pipe is mostly used for the conveying of fluid, its inner tubal wall of existing bimetal tube and outer tube wall usually use drawing
Or rolling mill practice reaches mechanical attachment, the dissimilar metal of inside and outside wall leans on the distortional stress obvolvent of material together, dissimilar metal
Contact interface be still layering, such Double-metal pipe for high temperature, high pressure, high corrosion medium, judder and
When the occasion that the very big temperature of the temperature difference frequently changes, it may appear that be gradually disengaged between two kinds of metals, lead to Pipeline damage, it is difficult to full
The demand of sufficient people.
Summary of the invention
The main purpose of the present invention is to provide a kind of preparation method of bimetallic pipe billet and its mold is prepared, it can be effective
Solve the problems in background technique.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of preparation method of bimetallic pipe billet and its mold is prepared, including bimetallic pipe billet forward extrusion preparation process and double
Metal pipe billet backward extrusion preparation process, the bimetallic pipe billet forward extrusion preparation process prepare bimetal tube for tubular blank,
The bimetallic pipe billet backward extrusion preparation process prepares bimetal tube for plate embryo material.
Preferably, specific step is as follows by the bimetallic pipe billet forward extrusion preparation process:
(S1), stock, first processing
(S1.1), inner and outer tubes embryo material is chosen according to the material requirements of bimetallic seamless pipe；
(S1.2), conditioning treatment is carried out to inner and outer tubes embryo material；
(S2), secondary treatment, pressing
(S2.1), surface skin film process is implemented to the inner and outer tubes embryo material after conditioning treatment；
(S2.2), epithelium removal is carried out to inner and outer tubes embryo material intussusception faying face；
(S2.3), cleaning is implemented to the inner and outer tubes embryo material after epithelium removal, and is dried；
(S2.4), apply forging lubricant on inner and outer tubes embryo material and forward extrusion mould contact surface, will in inner tube and
Outer tube embryo material is installed on forward extrusion mould；
(S2.5), forward extrusion mould is opened, the first workpiece is obtained；
(S3), it cuts
The extra and lack of standardization part in the first workpiece both ends is cut by cutter device, obtains the bimetal tube of standard.
Preferably, specific step is as follows by the bimetallic pipe billet backward extrusion preparation process:
(1), stock, first processing: being chosen the slab of two kinds of metals by the requirement of bimetallic seamless pipe, and to plate embryo into
Row conditioning treatment；
(2), plate embryo machines: matching two kinds of metal plate embryos with indirect-extrusion mould size by cutting；
(3), secondary treatment, pressing: epithelium processing is carried out to two kinds of metal plate embryo surfaces, then flat to two kinds of metal plate embryos
Folded faying face carries out epithelium removal, dry after cleaning to two kinds of metal plate embryos after epithelium removal, then is overlapped, and obtains
To the plate embryo component of overlapping, agent coating is lubricated in the plate embryo component and indirect-extrusion mould contact surface of overlapping, and by overlapping
It is intracavitary that plate embryo component is put into the backward extruding die on indirect-extrusion mould, implements backward extrusion processing, obtains second workpiece；
(4), it cuts
The extra and lack of standardization part in second workpiece both ends is cut by cutter device, obtains the bimetal tube of standard.
Preferably, conditioning treatment makes annealing treatment inner and outer tubes embryo material in the step (S1.2), makes interior
Pipe and outer tube embryo material hardness reduce, and plasticity is promoted, until the hardness of inner and outer tubes embryo material and moulding are consistent.
Preferably, conditioning treatment makes annealing treatment two kinds of metal plate embryos in the step (1), makes two kinds of gold
Belonging to plate embryo hardness reduces, and plasticity is promoted, until the hardness of two kinds of metal plate embryos and moulding are consistent.
Preferably, using through extrusion technique in the bimetallic pipe billet forward extrusion preparation process.
Preferably, forward extrusion mould includes forward extrusion cavity plate and forward extruding male mould in the step (S2.4), described just to squeeze
The first reinforcement mould is provided at indentation mould center, first reinforcement offers the first die hole, the forward extrusion at mould center
Punch-pin includes main part and the strengthening core that is set at the main part center, and the forward extruding male mould bottom is plugged in described the
In one die hole.
Preferably, indirect-extrusion mould includes extrusion female mould and Back Extrusion Punches, the backward extrusion in the step (3)
The second reinforcement mould is provided at cavity plate center, second reinforcement offers the second die hole, second cavity plate at mould center
Bottom hole portion is embedded with ejection mould at being located at below second die hole, and the Back Extrusion Punches are plugged in second die hole
Top.
Compared with prior art, the invention has the following beneficial effects:
Bimetallic pipe billet squeezes system by bimetallic pipe billet forward extrusion preparation process or bimetallic pipe billet anyway in the present invention
Standby technique reaches Diffusion Welding state, from metallography angle so that the contact interface of two kinds of metals is handled by high pressure and large deformation
From the point of view of degree, the contact interface of dissimilar metal has been fused into one, the bimetallic precision nothing for being squeezed or being drawn with such pipe
Slit-tube material is tightly combined between dissimilar metal, and strong vibration and expanding with heat and contract with cold for high temperature variation cannot make bimetallic point
It opens, therefore, chemical industry, medical instrument, aerospace and core work can be used in the bimetallic precision seamless pipe that this pipe is drawn
Industry field can be used for a long time under the adverse circumstances that high temperature, high pressure, judder and high temperature change；
And the by the present invention in that conventional forging equipment (cold forging press machine) that all has with general finish forge enterprise and common
Forging technology (cold-extrusion shaping) obtains the bimetallic pipe billet for reaching diffusion binding, in the market of bimetallic precision seamless tubular goods
Under the premise of demand is not very big, without the large-scale special equipment of purchasing expensive, investment is greatly saved.
Detailed description of the invention
Fig. 1 is a kind of preparation method of bimetallic pipe billet of the present invention and its prepares bimetallic pipe billet forward extrusion in mold and prepare
Technique makes overall structure flow chart；
Fig. 2 is a kind of preparation method of bimetallic pipe billet of the present invention and its prepares bimetallic pipe billet in mold and squeeze system anyway
Standby technique makes overall structure flow chart；
Fig. 3 is bimetallic pipe billet forward extrusion mould structural schematic diagram in the present invention；
Fig. 4 is bimetallic pipe billet indirect-extrusion mould structural schematic diagram in the present invention.
Marked in the figure: the 1, first die hole；2, forward extrusion cavity plate；3, first reinforces mould；4, main part；5, forward extrusion is convex
Mould；6, strengthening core；7, mould is ejected；8, extrusion female mould；9, second reinforces mould；10, the second die hole；11, Back Extrusion Punches
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
Embodiment 1
As shown in figures 1 and 3, a kind of preparation method of bimetallic pipe billet and its mold is prepared, including bimetallic pipe billet is just
Preparation process and bimetallic pipe billet backward extrusion preparation process are squeezed, the bimetallic pipe billet forward extrusion preparation process is used for tubulose embryo
Material prepares bimetal tube, and the bimetallic pipe billet backward extrusion preparation process prepares bimetal tube for plate embryo material.
Specific step is as follows by the bimetallic pipe billet forward extrusion preparation process:
(S1), stock, first processing
(S1.1), inner and outer tubes embryo material is chosen according to the material requirements of bimetallic seamless pipe；
(S1.2), conditioning treatment is carried out to inner and outer tubes embryo material；
(S2), secondary treatment, pressing
(S2.1), surface skin film process is implemented to the inner and outer tubes embryo material after conditioning treatment；
(S2.2), epithelium removal is carried out to inner and outer tubes embryo material intussusception faying face；
(S2.3), cleaning is implemented to the inner and outer tubes embryo material after epithelium removal, and is dried；
(S2.4), apply forging lubricant on inner and outer tubes embryo material and forward extrusion mould contact surface, will in inner tube and
Outer tube embryo material is installed on forward extrusion mould；
(S2.5), forward extrusion mould is opened, the first workpiece is obtained；
(S3), it cuts
The extra and lack of standardization part in the first workpiece both ends is cut by cutter device, obtains the bimetal tube of standard.
Conditioning treatment makes annealing treatment inner and outer tubes embryo material in the step (S1.2), makes inner and outer tubes
Embryo material hardness reduces, and plasticity is promoted, until the hardness of inner and outer tubes embryo material and moulding are consistent.
Using through extrusion technique in the bimetallic pipe billet forward extrusion preparation process.
Forward extrusion mould includes forward extrusion cavity plate 2 and forward extruding male mould 5 in the step (S2.4), in forward extrusion cavity plate 2
It is provided with the first reinforcement mould 3 at the heart, the first die hole 1 is offered at the first reinforcement 3 center of mould, forward extruding male mould 5 includes main body
Portion 4 and the strengthening core 6 being set at 4 center of main part, 5 bottom of forward extruding male mould is plugged in the first die hole 1.
In the pressing and forming of bimetallic pipe billet forward extrusion preparation process, the bimetal tube embryo of fitting is set to strengthening core 6
Lower section, when forward extruding male mould 5 pushes, the bimetal tube indusium of fitting is pressed down against, until it is squeezed from 1 bottom of the first die hole
The first workpiece, i.e. bimetallic pipe billet are formed out.
Embodiment 2
As shown in Figure 2 and Figure 4, a kind of preparation method of bimetallic pipe billet and its mold is prepared, including bimetallic pipe billet is just
Preparation process and bimetallic pipe billet backward extrusion preparation process are squeezed, the bimetallic pipe billet forward extrusion preparation process is used for tubulose embryo
Material prepares bimetal tube, and the bimetallic pipe billet backward extrusion preparation process prepares bimetal tube for plate embryo material.
Specific step is as follows by the bimetallic pipe billet backward extrusion preparation process:
(1), stock, first processing: being chosen the slab of two kinds of metals by the requirement of bimetallic seamless pipe, and to plate embryo into
Row conditioning treatment；
(2), plate embryo machines: matching two kinds of metal plate embryos with indirect-extrusion mould size by cutting；
(3), secondary treatment, pressing: epithelium processing is carried out to two kinds of metal plate embryo surfaces, then flat to two kinds of metal plate embryos
Folded faying face carries out epithelium removal, dry after cleaning to two kinds of metal plate embryos after epithelium removal, then is overlapped, and obtains
To the plate embryo component of overlapping, agent coating is lubricated in the plate embryo component and indirect-extrusion mould contact surface of overlapping, and by overlapping
It is intracavitary that plate embryo component is put into the backward extruding die on indirect-extrusion mould, implements backward extrusion processing, obtains second workpiece；
(4), it cuts
The extra and lack of standardization part in second workpiece both ends is cut by cutter device, obtains the bimetal tube of standard.
Conditioning treatment makes annealing treatment two kinds of metal plate embryos in step (1), makes two kinds of metal plate embryo hardness drops
Low, plasticity is promoted, until the hardness of two kinds of metal plate embryos and moulding are consistent.
Indirect-extrusion mould includes extrusion female mould 8 and Back Extrusion Punches 11,8 center of extrusion female mould in the step (3)
Place is provided with the second reinforcement mould 9, offers the second die hole 10 at the second reinforcement 9 center of mould, 10 bottom of the second die hole is located at
Ejection mould 7 is embedded at second die hole, 10 lower section, Back Extrusion Punches 11 are plugged in 10 top of the second die hole.
As shown in figure 4, the plate embryo component of overlapping is set in the bonding processes of bimetallic pipe billet backward extrusion preparation process
Second convex 10 lower inside of fenestra is set to the plate embryo component overlapped below Back Extrusion Punches 11 when Back Extrusion Punches 8 push
From being squeezed upwards from 11 edge of Back Extrusion Punches, until its formation is socketed on the second workpiece of 11 lower section of Back Extrusion Punches, i.e., double gold
Belong to pipe.
The be laminated principle of welding of two kinds of metals is in Example 1 and Example 2 of the present invention: connecing to two kinds of metals
It touches interface and applies enough high pressures, when keeping two kinds of metallic surface distances close and reaching the space length of metallic atom, metal
The metallic atom on interface both sides can mutually cross interface (diffusion) and be formed new metallic bond (cold welding), finally make two pieces of metal connection
Be connected into one, this two kinds of metals under high pressure mutual soldering the phenomenon that be known as " Diffusion Welding ".
The high pressure and aximal deformation value generated in benefit metal Cold Extrusion Process of the invention, prolongs the contact interface of two kinds of metals
Extension is stretched, the original oxidation film in metal surface is elongated cause and is crushed, and exposes fresh metal surface, two kinds of inoxidized atoms
The metal surface of state passes through the counterdiffusion of contact interface phase under cold extrusion high pressure and is formed atom key (cold welding), and broken metal
Oxidation film forms one piece of block independent isolated island under the influence of cold extrusion high pressure and deformation temperature, is in the cold welding face of atomic contacts
It surrounds, forms reliable bimetal tube.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (8)
1. a kind of preparation method of bimetallic pipe billet and its preparing mold, including bimetallic pipe billet forward extrusion preparation process and double gold
Belong to pipe backward extrusion preparation process, which is characterized in that the bimetallic pipe billet forward extrusion preparation process is prepared for tubular blank
Bimetal tube, the bimetallic pipe billet backward extrusion preparation process prepare bimetal tube for plate embryo material.
2. a kind of preparation method of bimetallic pipe billet according to claim 1 and its preparing mold, it is characterised in that: described
Specific step is as follows by bimetallic pipe billet forward extrusion preparation process:
(S1), stock, first processing
(S1.1), inner and outer tubes embryo material is chosen according to the material requirements of bimetallic seamless pipe；
(S1.2), conditioning treatment is carried out to inner and outer tubes embryo material；
(S2), secondary treatment, pressing
(S2.1), surface skin film process is implemented to the inner and outer tubes embryo material after conditioning treatment；
(S2.2), epithelium removal is carried out to inner and outer tubes embryo material intussusception faying face；
(S2.3), cleaning is implemented to the inner and outer tubes embryo material after epithelium removal, and is dried；
(S2.4), forging lubricant is applied on inner and outer tubes embryo material and forward extrusion mould contact surface, it will be in inner and outer tubes
Embryo material is installed on forward extrusion mould；
(S2.5), forward extrusion mould is opened, the first workpiece is obtained；
(S3), it cuts
The extra and lack of standardization part in the first workpiece both ends is cut by cutter device, obtains the bimetal tube of standard.
3. a kind of preparation method of bimetallic pipe billet according to claim 1 and its preparing mold, it is characterised in that: described
Specific step is as follows by bimetallic pipe billet backward extrusion preparation process:
(1), stock, first processing: being chosen the slab of two kinds of metals by the requirement of bimetallic seamless pipe, and is carried out to plate embryo pre-
Standby heat treatment；
(2), plate embryo machines: matching two kinds of metal plate embryos with indirect-extrusion mould size by cutting；
(3), secondary treatment, pressing: carrying out epithelium processing to two kinds of metal plate embryo surfaces, then flat folded to two kinds of metal plate embryos
Faying face carries out epithelium removal, dry after cleaning to two kinds of metal plate embryos after epithelium removal, then is overlapped, and is folded
The plate embryo component of conjunction is lubricated agent coating in the plate embryo component and indirect-extrusion mould contact surface of overlapping, and by the plate embryo of overlapping
It is intracavitary that component is put into the backward extruding die on indirect-extrusion mould, implements backward extrusion processing, obtains second workpiece；
(4), it cuts
The extra and lack of standardization part in second workpiece both ends is cut by cutter device, obtains the bimetal tube of standard.
4. according to a kind of preparation method of any bimetallic pipe billet of claim 2 and its preparing mold, it is characterised in that:
Conditioning treatment makes annealing treatment inner and outer tubes embryo material in the step (S1.2), makes inner and outer tubes embryo material hardness
It reduces, plasticity is promoted, until the hardness of inner and outer tubes embryo material and moulding are consistent.
5. a kind of preparation method of bimetallic pipe billet according to claim 3 and its preparing mold, it is characterised in that: described
Conditioning treatment makes annealing treatment two kinds of metal plate embryos in step (1), reduces by two kinds of metal plate embryo hardness, plastic
Property promoted, until the hardness of two kinds of metal plate embryos and moulding are consistent.
6. a kind of preparation method of bimetallic pipe billet according to claim 2 and its preparing mold, it is characterised in that: described
Using through extrusion technique in bimetallic pipe billet forward extrusion preparation process.
7. a kind of preparation method of bimetallic pipe billet according to claim 2 and its preparing mold, it is characterised in that: described
Forward extrusion mould includes forward extrusion cavity plate (2) and forward extruding male mould (5), forward extrusion cavity plate (2) center in step (S2.4)
Place is provided with the first reinforcement mould (3), and first reinforcement offers the first die hole (1) at mould (3) center, and the forward extrusion is convex
Mould (5) includes main part (4) and the strengthening core (6) that is set at the main part (4) center, forward extruding male mould (5) bottom
Portion is plugged in first die hole (1).
8. a kind of preparation method of bimetallic pipe billet according to claim 3 and its preparing mold, it is characterised in that: described
Indirect-extrusion mould includes extrusion female mould (8) and Back Extrusion Punches (11) in step (3), at extrusion female mould (8) center
It is provided with the second reinforcement mould (9), second reinforcement offers the second die hole (10) at mould (9) center, second cavity plate
Hole (10) bottom is embedded with ejection mould (7), Back Extrusion Punches (11) grafting at being located at below second die hole (10)
Above second die hole (10).
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| CN201910592390.9A CN110202019A (en) | 2019-07-03 | 2019-07-03 | A kind of preparation method of bimetallic pipe billet and its prepare mold |
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| CN201910592390.9A CN110202019A (en) | 2019-07-03 | 2019-07-03 | A kind of preparation method of bimetallic pipe billet and its prepare mold |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116174588A (en) * | 2023-04-27 | 2023-05-30 | 中北大学 | Forward extrusion preparation mold for inner and outer double-layer metal bars and bar preparation method |
| CN116871345A (en) * | 2023-09-06 | 2023-10-13 | 陕西长羽航空装备股份有限公司 | Reverse extrusion forming method for small-sized dissimilar alloy |
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| CN116871345A (en) * | 2023-09-06 | 2023-10-13 | 陕西长羽航空装备股份有限公司 | Reverse extrusion forming method for small-sized dissimilar alloy |
| CN116871345B (en) * | 2023-09-06 | 2023-12-01 | 陕西长羽航空装备股份有限公司 | Reverse extrusion forming method for small-sized dissimilar alloy |
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