CN105690045B - The production method of flat-bulb steel - Google Patents
The production method of flat-bulb steel Download PDFInfo
- Publication number
- CN105690045B CN105690045B CN201610257108.8A CN201610257108A CN105690045B CN 105690045 B CN105690045 B CN 105690045B CN 201610257108 A CN201610257108 A CN 201610257108A CN 105690045 B CN105690045 B CN 105690045B
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- flat
- bulb
- bulb steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- 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
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of production method of flat-bulb steel, wherein, the Hot Extrusion Equipment includes the recipient and extrusion die (2) being connected to each other, the flat-bulb steel pass of the extrusion die (2) includes web pass (22) and the bulb pass (21) positioned at web pass (22) both ends, so as to which the bar extruding is shaped into the flat-bulb steel blank with two bulbs (11) by the flat-bulb steel pass, and cuts away one of them described bulb (11) and the flat-bulb steel (1) is made.By being the form with two bulb passes and a web pass by flat-bulb steel hole type design, the area of section of flat-bulb steel pass can be increased, so as to reduce required extruding driving force, so that existing Hot Extrusion Equipment can apply to the extrusion process of the higher material of intensity, cost caused by improving equipment is avoided to improve, production cost can be reduced, and improvement is simple and easy, can quickly put into production.
Description
Technical field
The present invention relates to the production method of special section, in particular it relates to a kind of production method of flat-bulb steel.
Background technology
Flat-bulb steel is one kind of special sections, is made up of flat web and torulose bulb, in the transversal of flat-bulb steel
In face, bulb is connected to web wherein one end, and so as to form big end, without setting one end of bulb to be formed as small end, ball is flat
Steel belongs to asymmetric shaped steel.
Flat-bulb steel can be made up of 00Cr21Ni14Mn5Mo3N materials, have corrosion resistance and good, elevated temperature strength and low temperature
Intensity is double high, plasticity is good, toughness is high, the big physical characteristic such as low with magnetic of thermal coefficient of expansion, is mainly used in the manufacture of ship, naval vessels
Deng field.
In the manufacture method of flat-bulb steel profile shapes, pieces of bar stock can be preheated by preheating furnace, then use sensing heating
Bar extruding is shaped to flat-bulb steel by blank heating to suitable target temperature by stove using hot-extrusion mold.Then by rear
The PROCESS FOR TREATMENT such as continuous heat treatment and machining, obtain finished ball band steel section bar.
For the material of the stainless high-strength steel of 00Cr21Ni14Mn5Mo3N in the range of plastic deformation temperatures, its elevated temperature strength is relative
It is higher, it is higher by 20% than the typically stainless steel containing Ni.According to the extrusion process and extrusion die hole type design of routine, the material leads to
The extruding force crossed required for extrusion forming, can not smooth extrusion molding beyond the capacity limit of Hot Extrusion Equipment.
The content of the invention
The feelings of the hypodynamic extrusion equipment of existing extruding driving can be changed without it is an object of the invention to provide a kind of
Only by simply improving the method that can produce flat-bulb steel under condition.
To achieve these goals, the present invention provides a kind of production method of flat-bulb steel, and flat-bulb steel includes web and bulb,
The production method processes the bar for preparing the flat-bulb steel including the use of Hot Extrusion Equipment, wherein, the Hot Extrusion Equipment
Including the recipient and extrusion die being connected to each other, the recipient leads to formed with the blank that the receiving bar is moved through
Road, the extrusion die block the port of export of the blank passage, and the extrusion die is towards the end of the blank passage
Flat-bulb steel pass formed with insertion on face, the flat-bulb steel pass include web pass and the ball positioned at the web pass both ends
Head bore type, so as to which the bar extruding is shaped into the flat-bulb steel hair with two bulbs by the flat-bulb steel pass
Base, and the flat-bulb steel is made by cutting away one of them described bulb according to the width of the web of the flat-bulb steel.
Preferably, the extrusion die is provided with glass lubrication pad, the glass profit towards the end face of the blank passage
Skidding is formed with the lubrication through hole to be alignd with the flat-bulb steel pass so as to fully expose the entrance of the flat-bulb steel pass.
Preferably, the bar is made up of 00Cr21Ni14Mn5Mo3N.
Preferably, the production method includes being heated to the bar to use the Hot Extrusion Equipment after processing temperature
Processing.
Preferably, the processing temperature is 1180-1220 DEG C.
Preferably, the production method includes handling the flat-bulb steel blank air cooling of extrusion forming.
Preferably, the production method includes carrying out solution treatment to the flat-bulb steel blank after air cooling processing, described
The temperature of solution treatment is 1000-1100 DEG C, and soaking time is 30-40 minutes.
Preferably, the production method includes applying the flat-bulb steel blank of extrusion forming by seven-roll Abramsen machine and drawn
Stretch and torsion, to align the flat-bulb steel blank.
Preferably, the width of the web pass is more than the width of the web of the flat-bulb steel.
Preferably, the extruding driving force of the Hot Extrusion Equipment is 3000-3500 tons.
Pass through above-mentioned technical proposal, by being with two bulb passes and a web pass by flat-bulb steel hole type design
Form, the area of section of flat-bulb steel pass can be increased, so as to reduce required extruding driving force so that existing hot extrusion
Equipment can apply to the extrusion process of the higher material of intensity, avoids cost caused by improving equipment and improves, can drop
Low production cost, and improvement is simple and easy, can quickly put into production.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the cross section structure schematic diagram according to the flat-bulb steel of one embodiment of the present invention.
Fig. 2 is the structural representation according to the extrusion die of one embodiment of the present invention.
Fig. 3 is the structural representation according to the glass lubrication pad of one embodiment of the present invention.
Description of reference numerals
The extrusion die of 1 flat-bulb steel 2
3 glass lubrications pad 11 bulbs
The bulb pass of 12 web 21
22 web passes 31 lubricate through hole
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The invention provides a kind of production method of flat-bulb steel, wherein, the flat-bulb steel 1 includes web 12 and bulb 11,
The production method processes the bar for preparing the flat-bulb steel 1 including the use of Hot Extrusion Equipment, wherein, the Hot Extrusion Equipment
Including the recipient and extrusion die 2 being connected to each other, the recipient leads to formed with the blank that the receiving bar is moved through
Road, the extrusion die 2 block the port of export of the blank passage, and the extrusion die 2 is towards the blank passage
Flat-bulb steel pass formed with insertion on end face, the flat-bulb steel pass include web pass 22 and positioned at 22 liang of the web passes
The bulb pass 21 at end, so as to which the bar extruding is shaped to two bulbs 11 by the flat-bulb steel pass
Flat-bulb steel blank, and made according to the width of the web 12 of the flat-bulb steel 1 by cutting away one of them described bulb 11
Into the flat-bulb steel 1.
The blank passage of cylinder can be formed inside the recipient, the bar can be in the extruding of Hot Extrusion Equipment
Under the active force of bar, moved towards the extrusion die 2 positioned at described recipient one end, and be further advanced by extrusion die 2
The flat-bulb steel pass, form flat-bulb steel blank corresponding with the flat-bulb steel pass.Extrusion die 2 can be cylinder or lid
Sub- shape, block the port of export in the recipient.
The improvement basis of technical scheme is：Original Hot Extrusion Equipment is held essentially constant, particularly logical
The structure for crossing extruding drive mechanism and recipient keeps constant, i.e., the maximum nip pressure provided by pressure ram into recipient
Keep constant.In the case, the nip pressure required for the pyroplastic deformability of the material of production flat-bulb steel after replacing
When being improved by a relatively large margin compared to original material, the nip pressure that original extruding drive mechanism provides can not to change
Material afterwards produces plastic deformation, i.e., can not complete extrusion deformation process.
In the case where being changed without Hot Extrusion Equipment, the area of the flat-bulb steel pass by increasing extrusion die 2, can subtract
The ratio between the initial cross-section area of the small bar and the area of section of flat-bulb steel blank of production, correspondingly, the change of the bar
Shape amount relatively reduces, therefore the nip pressure required for bar production plastic deformation also reduces, so as to be squeezed original
In the case of pressing the nip pressure of drive mechanism offer constant, the Hot Extrusion Equipment can be enabled to complete the higher extruding of needs
The extrusion process of the material of pressure.
Usually, higher requirement is proposed to the intensity of flat-bulb steel in face of party in request, producer needs to use intensity higher
Material, and existing equipment is likely difficult to complete such extrusion process, it has to which selection renewal is driven with bigger extruding
Power-equipment is, it is necessary to pay very big equipment cost.And the present invention is added by changing extrusion die 2 this small parts
The area (as shown in Figure 2) of flat-bulb steel pass, required extruding driving force can be greatly decreased, and acquisition has two balls
The flat-bulb steel of head, one of bulb is then cut off using cutting technique and can be made into flat-bulb steel as shown in Figure 1, therefore passed through
Relatively simple process modification can make present equipment complete the extrusion process of high-strength material, have very big economic valency
Value.
In addition, recipient and extrusion die use the intensity of material to be typically larger than the intensity of bar to be extruded, but such as
When the bar that fruit uses is intensity in the art extra high material, it is difficult to such recipient and extrusion die are provided, if
Extruded using traditional method, do not need only provide for higher extruding driving force, and be likely to cause recipient and squeeze
Compression mould damages；And the improvement project of the present invention is used, extruding driving force can be kept constant, therefore recipient and extrusion die
The extruding force being subject to also comparatively rationally, is hardly damaged recipient and extrusion die.
In addition, the specific method of present invention increase flat-bulb steel pass is to set a ball respectively at the both ends of web pass 22
Head bore type 21, two bulb passes 21 can be located at the homonymy of web pass 22, such as shown in Fig. 2, now, flat-bulb steel pass is
Axially symmetric structure, the section of the flat-bulb steel blank of extrusion forming is also axial symmetry；Certainly, two bulb passes 21 can also be located at
The both sides of web pass 22, are formed as centrosymmetric structure.Generally speaking, the contour curve of bulb part is more smooth, and passes
One end that the web pass of system is not provided with bulb pass forms more sharp corner angle, and therefore, either flat-bulb steel pass is also
It is the flat-bulb steel blank of extrusion forming, all reduces more sharp corner angle, it is not easy to as the starting point of cracking, reduces structure and open
The risk split.
In addition, the extrusion die 2 is provided with glass lubrication pad 3, the glass profit towards the end face of the blank passage
Skidding 3 is formed with the lubrication through hole 31 to be alignd with the flat-bulb steel pass so as to fully expose entering for the flat-bulb steel pass
Mouthful.As shown in figure 3, lubrication through hole 31 can be slot, and the size of the slot is more than the flat-bulb steel pass
Size, that is, the width for lubricating through hole 31 is more than the horizontal maximum size of the flat-bulb steel pass shown in Fig. 2, and lubricates logical
The length in hole 31 is more than longitudinal full-size of the flat-bulb steel pass shown in Fig. 2.The surface that glass lubrication pad 3 exposes can be with
It can partly be melted in extrusion process and intervene the bar between the flat-bulb steel pass, play lubrication, can
To reduce the resistance of extruding, and the internal face of the flat-bulb steel pass of extrusion die 2 can be protected.
Specifically, the bar is made up of 00Cr21Ni14Mn5Mo3N, and the material is compared to its modeling of common Ni stainless steels
Property deformation pressure be higher by about 20%.Correspondingly, the production method includes being heated to use after processing temperature by the bar
The Hot Extrusion Equipment processing.Preferably, the processing temperature is 1180-1220 DEG C.The processing temperature can be according to waiting to squeeze
Material and the material of the recipient and extrusion die 2 is pressed to determine, it shall be guaranteed that extrded material can be plastically deformed, and
Recipient and extrusion die 2 are indeformable with larger intensity.
In addition, the production method includes handling the flat-bulb steel blank air cooling of extrusion forming.The flat-bulb steel hair
Base is heated to the processing temperature before extrusion forming by preheating furnace, the method that can use air cooling after extrusion forming
The flat-bulb steel blank is cooled to normal temperature.It is of course also possible to according to the different and required target metallographic structures of material not
Take the cooling means such as water cooling, air-cooled together.
In addition, the production method includes carrying out solution treatment to the flat-bulb steel blank after air cooling processing, it is described solid
The temperature of molten processing is 1000-1100 DEG C, and soaking time is 30-40 minutes.By solution treatment, various phases in alloy can be made
Fully dissolving, Intensive intervention body, and toughness and etch resistant properties are improved, stress and softening are eliminated, to continue to process or to be molded.
In addition, the flat-bulb steel blank of extrusion forming is the beams with certain length, quilt during due to extrusion process
Higher temperature is heated to, after extrusion die 2 is left, because the Action of Gravity Field of itself is likely to form bending, it is necessary to be rectified
Directly, therefore, the production method include applying the flat-bulb steel blank of extrusion forming by seven-roll Abramsen machine tensile force and
Torsion, to align the flat-bulb steel blank.As described above, when bulb pass 21 is located at the homonymy of web pass 22 with web hole
When the homonymy of type 22 protrudes, the flat-bulb steel pass is axially symmetric structure, and correspondingly, the flat-bulb steel blank is axial symmetry knot
Structure.In traditional processing technology, because flat-bulb steel is unsymmetric structure, it is impossible to it is applied by the seven-roll Abramsen machine pair
The active force of title, therefore, because the power that the both sides of web 11 are applied is asymmetric, easily causes flat-bulb steel and laterally offset or curved occurs
Song, very big inconvenience is brought to straightening operation；And in the operating procedure of the present invention, seven-roll Abramsen machine can be to the flat-bulb steel
Blank applies symmetrical tensile force and torsion, avoids the flat-bulb steel blank that laterally offset or bending occurs.
In addition, the width of the web pass 22 is more than the width of the web 12 of the flat-bulb steel 1.Herein, the web
The width of pass 22 is the length of the longitudinal direction shown in Fig. 2, and the web pass 22 is in the length of the horizontal direction shown in Fig. 2
Degree can be defined as the thickness of web pass 22；The width of web 12 is the length of the horizontal direction shown in Fig. 1.As described above,
The flat-bulb steel blank needs to cut away one of bulb 11 by cutting operation flat-bulb steel 1 is made, and therefore, the ball is flat
The width of steel wool base midfield plate part can " slightly " be more than the width of the web 11 of flat-bulb steel 1, reserve allowance.Separately
Outside, the quality cutting of two bulbs 11 can be selected during cutting, such as can select to cut away the bulb 11 that surface defect be present；
Also, when one of bulb pass 21 of extrusion die 2 has the breakage of a small amount of unobvious (but influenceing extrusion blank quality)
When, it can continue to use the extrusion die 2, as long as because bulb 11 corresponding to cutting away can obtain qualified flat-bulb steel 1.
Specifically, the extruding driving force of the Hot Extrusion Equipment is 3000-3500 tons.The extruding driving force is mainly used in general
Logical Ni stainless steels, it is not to be directed to 00Cr21Ni14Mn5Mo3N bar particular designs, i.e., can not be added by traditional method
The flat-bulb steel of this kind of material of work, and improvement of the present invention to extrusion die is also exactly to be proposed for this problem.Certainly, for
The extruding driving force deficiency problem that most strength of materials enhancing is brought, or be due to extrusion equipment bearing capacity it is limited
Rather than the problem of improving extruding driving force, mentality of designing of the invention can be used for reference.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of production method of flat-bulb steel, flat-bulb steel (1) includes web (12) and bulb (11), and the production method includes making
The bar for preparing the flat-bulb steel (1) is processed with Hot Extrusion Equipment, wherein, what the Hot Extrusion Equipment included being connected to each other squeezes
Pressure cylinder and extrusion die (2), the blank passage that the recipient is moved through formed with the receiving bar, the extrusion die
(2) block the port of export of the blank passage, and the extrusion die (2) towards on the end face of the blank passage formed with
The flat-bulb steel pass of insertion, it is characterised in that the flat-bulb steel pass includes web pass (22) and positioned at the web pass
(22) the bulb pass (21) at both ends, so as to be shaped to have described in two by the bar extruding by the flat-bulb steel pass
The flat-bulb steel blank of bulb (11), and according to the width of the web (12) of the flat-bulb steel (1) by cutting away one of them
The bulb (11) and the flat-bulb steel (1) is made.
2. production method according to claim 1, it is characterised in that the extrusion die (2) is towards the blank passage
End face be provided with glass lubrication pad (3), the glass lubrication pad (3) is led to formed with the lubrication alignd with the flat-bulb steel pass
Hole (31) is so as to fully expose the entrance of the flat-bulb steel pass.
3. production method according to claim 1, it is characterised in that the bar is made up of 00Cr21Ni14Mn5Mo3N.
4. production method according to claim 3, it is characterised in that the production method includes the bar being heated to
Processed after processing temperature using the Hot Extrusion Equipment.
5. production method according to claim 4, it is characterised in that the processing temperature is 1180-1220 DEG C.
6. production method according to claim 4, it is characterised in that the production method is included described in extrusion forming
The processing of flat-bulb steel blank air cooling.
7. production method according to claim 6, it is characterised in that the production method is included to the institute after air cooling processing
State flat-bulb steel blank and carry out solution treatment, the temperature of the solution treatment is 1000-1100 DEG C, and soaking time is 30-40 minutes.
8. production method according to claim 7, it is characterised in that the production method includes passing through seven-roll Abramsen machine pair
The flat-bulb steel blank of extrusion forming applies tensile force and torsion, to align the flat-bulb steel blank.
9. production method according to claim 1, it is characterised in that the width of the web pass (22) is more than the ball
The width of the web (12) of band steel (1).
10. production method according to claim 1, it is characterised in that the extruding driving force of the Hot Extrusion Equipment is
3000-3500 tons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610257108.8A CN105690045B (en) | 2016-04-22 | 2016-04-22 | The production method of flat-bulb steel |
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| CN201610257108.8A CN105690045B (en) | 2016-04-22 | 2016-04-22 | The production method of flat-bulb steel |
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| CN105690045A CN105690045A (en) | 2016-06-22 |
| CN105690045B true CN105690045B (en) | 2017-11-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421839B (en) * | 2018-05-28 | 2019-07-05 | 山西太钢不锈钢股份有限公司 | A kind of flat-bulb steel diplopore model extrusion method |
| CN108787742A (en) * | 2018-07-06 | 2018-11-13 | 鞍钢股份有限公司 | A kind of middle-size and small-size milling method for making Flat-bulb Steel for Ship Use |
| CN109261714B (en) * | 2018-09-05 | 2020-04-24 | 鞍钢股份有限公司 | Rolling method of symmetrical flat-bulb steel for large shipbuilding |
| CN109746265A (en) * | 2019-01-31 | 2019-05-14 | 常熟市龙腾特种钢有限公司 | A kind of flat-bulb steel rolling groove design method |
| CN115041784B (en) * | 2022-07-26 | 2023-07-28 | 广船国际有限公司 | Butt welding method for non-equal-height flat-bulb steel |
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| JPS53118261A (en) * | 1977-03-25 | 1978-10-16 | Sumitomo Metal Ind Ltd | Die for use in hot extrusion of non-symmetrical shape steel |
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