CN105690045A - Method for producing flat bulb steel - Google Patents
Method for producing flat bulb steel Download PDFInfo
- Publication number
- CN105690045A CN105690045A CN201610257108.8A CN201610257108A CN105690045A CN 105690045 A CN105690045 A CN 105690045A CN 201610257108 A CN201610257108 A CN 201610257108A CN 105690045 A CN105690045 A CN 105690045A
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- flat
- 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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- Mechanical Engineering (AREA)
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- Extrusion Of Metal (AREA)
Abstract
The invention discloses a method for producing flat bulb steel. Hot extrusion equipment comprises an extrusion cylinder and an extrusion mold (2) which are mutually connected; flat bulb steel hole patterns of the extrusion mold (2) comprise a web hole pattern (22) and bulb hole patterns (21) at the two ends of the web hole pattern (22), accordingly, a rod is extruded to form a flat bulb steel blank provided with two bulbs (11) by the flat bulb steel hole patterns, one of the bulbs (11) is cut off, and the flat bulb steel (1) is produced. By designing the flat bulb steel hole patterns into a form with the two bulb hole patterns and one web hole pattern, the area of the cross section of the flat bulb steel hole patterns can be increased, accordingly, required extrusion drive force is reduced, existing hot extrusion equipment can be applied to extrusion machining of materials with higher strength, the increase in cost caused by equipment improvement is avoided, the production cost can be lowered, the improvement work is simple and easy to implement, and the flat bulb steel can be quickly put into production.
Description
Technical field
The present invention relates to the production method of special section, in particular it relates to the production method of a kind of flat-bulb steel。
Background technology
Flat-bulb steel is the one of special sections, is made up of flat web and torulose bulb, in the cross section of flat-bulb steel, bulb is connected to web wherein one end, thus forming big end, being formed as small end without the one end arranging bulb, flat-bulb steel belongs to asymmetric shaped steel。
Flat-bulb steel can be made up of 00Cr21Ni14Mn5Mo3N material, has double; two high, the physical characteristic such as plasticity good, toughness is high, thermal coefficient of expansion is big and magnetic is low of corrosion resistance and good, elevated temperature strength and low temperature intensity, is mainly used in the field such as manufacture of boats and ships, naval vessels。
In the manufacture method of flat-bulb steel profile shapes, it is possible to pieces of bar stock preheated by preheating furnace, then with induction heater by blank heating to suitable target temperature, use hot-extrusion mold that bar extruding is shaped to flat-bulb steel。Subsequently by PROCESS FOR TREATMENT such as follow-up heat treatment and machinings, obtain finished ball band steel section bar。
The material of the stainless high-strength steel of 00Cr21Ni14Mn5Mo3N is within the scope of plastic deformation temperatures, and its elevated temperature strength is of a relatively high, than generally exceeds 20% containing Ni is stainless。Extrusion process conventionally and extrusion die hole type design, this material is by the extruded required extruding force capacity limit beyond Hot Extrusion Equipment, it is impossible to extrusion molding smoothly。
Summary of the invention
It is an object of the invention to provide a kind of can when being changed without existing extruding drives hypodynamic extrusion equipment only by simply improving the method that can produce flat-bulb steel。
To achieve these goals, the present invention provides the production method of a kind of flat-bulb steel, flat-bulb steel includes web and bulb, described production method includes the bar using Hot Extrusion Equipment processing for preparing this flat-bulb steel, wherein, described Hot Extrusion Equipment includes the recipient and the extrusion die that are connected to each other, described recipient is formed and holds the blank passage that described bar is moved through, described extrusion die blocks the port of export of described blank passage, and described extrusion die is formed with through flat-bulb steel pass on the end face of described blank passage, described flat-bulb steel pass includes web pass and is positioned at the bulb pass at these web pass two ends, thereby through described flat-bulb steel pass, described bar extruding is shaped to the flat-bulb steel blank with two described bulbs, and the width of the web according to described flat-bulb steel makes described flat-bulb steel by cutting away one of them described bulb。
Preferably, described extrusion die is provided with glass lubrication pad towards the end face of described blank passage, and described glass lubrication pad is formed with the lubrication through hole alignd with described flat-bulb steel pass thus fully exposing the entrance of described flat-bulb steel pass。
Preferably, described bar is made up of 00Cr21Ni14Mn5Mo3N。
Preferably, described production method uses described Hot Extrusion Equipment to process after including described bar is heated to processing temperature。
Preferably, described processing temperature is 1180-1220 DEG C。
Preferably, described production method includes processing extruded described flat-bulb steel blank air cooling。
Preferably, the described flat-bulb steel blank that described production method includes after air cooling is processed carries out solution treatment, and the temperature of described solution treatment is 1000-1100 DEG C, and temperature retention time is 30-40 minute。
Preferably, described production method includes, by seven-roll Abramsen machine, extruded described flat-bulb steel blank is applied tensile force and torsion, to align described flat-bulb steel blank。
Preferably, the width of described web pass is more than the width of the web of described flat-bulb steel。
Preferably, the extruding driving force of described Hot Extrusion Equipment is 3000-3500 ton。
Pass through technique scheme, 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, thus reducing required extruding driving force, the existing Hot Extrusion Equipment is made to can apply to the extrusion process of the higher material of intensity, it is to avoid the cost brought that improves equipment improves, it is possible to reduce production cost, and improvement is simple, it is possible to quickly put into production。
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently。
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, is used for explaining the present invention, but is not intended that limitation of the present invention together with detailed description below。In the accompanying drawings:
Fig. 1 is the cross section structure schematic diagram of the flat-bulb steel according to one embodiment of the present invention。
Fig. 2 is the structural representation of the extrusion die according to one embodiment of the present invention。
Fig. 3 is the structural representation of the glass lubrication pad according to one embodiment of the present invention。
Description of reference numerals
1 flat-bulb steel 2 extrusion die
3 glass lubrication pad 11 bulbs
12 web 21 bulb passes
22 web passes 31 lubricate through hole
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail。It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains the present invention, it is not limited to the present invention。
The invention provides the production method of a kind of flat-bulb steel, wherein, described flat-bulb steel 1 includes web 12 and bulb 11, described production method includes the bar using Hot Extrusion Equipment processing for preparing this flat-bulb steel 1, wherein, described Hot Extrusion Equipment includes the recipient and the extrusion die 2 that are connected to each other, described recipient is formed and holds the blank passage that described bar is moved through, described extrusion die 2 blocks the port of export of described blank passage, and described extrusion die 2 is formed with through flat-bulb steel pass on the end face of described blank passage, described flat-bulb steel pass includes web pass 22 and is positioned at the bulb pass 21 at these web 12 pass two ends, thereby through described flat-bulb steel pass, described bar extruding is shaped to the flat-bulb steel blank with two described bulbs 11, and the width of the web 12 according to described flat-bulb steel 1 makes described flat-bulb steel 1 by cutting away one of them described bulb 11。
The blank passage of cylinder can be formed inside described recipient, described bar can under the active force of the pressure ram of Hot Extrusion Equipment, move towards the extrusion die 2 being positioned at described recipient one end, and it is further advanced by the described flat-bulb steel pass of extrusion die 2, form the flat-bulb steel blank corresponding with described flat-bulb steel pass。Extrusion die 2 can be cylindrical or cover shape, blocks the port of export at described recipient。
The improvement basis of technical scheme is: being held essentially constant of original Hot Extrusion Equipment, and the structure especially by extruding driving mechanism and recipient remains unchanged, and is namely remained unchanged to the maximum nip pressure of offer in recipient by pressure ram。In the case, when nip pressure required for the pyroplastic deformability of the material producing flat-bulb steel after changing improves by a relatively large margin compared to original material, the material that can not make after changing is produced plastic deformation by the nip pressure that original extruding driving mechanism provides, and namely can not complete extrusion deformation process。
When being changed without Hot Extrusion Equipment, by increasing the area of the flat-bulb steel pass of extrusion die 2, the ratio of the initial cross-section area of described bar and the area of section of the flat-bulb steel blank of production can be reduced, correspondingly, the deflection of described bar relatively reduces, therefore the nip pressure required for described bar production plastic deformation also reduces, thus when the nip pressure that original extruding driving mechanism provides is constant, it is possible to make this Hot Extrusion Equipment can complete to need the extrusion process of the material of higher nip pressure。
Usually, in the face of the intensity of flat-bulb steel is proposed higher requirement by party in request, producer needs the material that working strength is higher, and existing equipment has been likely difficult to such extrusion process, have to select to update that there is bigger extruding driving force equipment, it is necessary to pay very big equipment cost。And the present invention is modified this small parts of extrusion die 2, add the area (as shown in Figure 2) of flat-bulb steel pass, required extruding driving force can be greatly decreased, and obtain the flat-bulb steel with two bulbs, adopt cutting technique to excise one of them bulb subsequently and namely can be made into flat-bulb steel as shown in Figure 1, therefore present equipment can be made to complete the extrusion process of high-strength material by relatively simple process modification, there is very big economic worth。
Additionally, the intensity of recipient and the adopted material of extrusion die is typically larger than the intensity of bar to be extruded, but when if the bar used is the extra high material of intensity in this area, it is difficult to provide such recipient and extrusion die, if using traditional method to extrude, do not need only provide for higher extruding driving force, and be likely to cause recipient and extrusion die to damage；And adopt the improvement project of the present invention, it is possible to keeping extruding driving force constant, the extruding force that therefore recipient and extrusion die are subject to is also comparatively reasonable, is hardly damaged recipient and extrusion die。
In addition, it is be respectively provided with a bulb pass 21 at the two ends of web pass 22 that the present invention increases the concrete grammar of flat-bulb steel pass, two bulb passes 21 may be located at the homonymy of web pass 22, such as shown in Fig. 2, now, flat-bulb steel pass is axially symmetric structure, and the cross section of extruded flat-bulb steel blank is also axial symmetry；Certainly, two bulb passes 21 can also be positioned at the both sides of web pass 22, is formed as centrosymmetric structure。Generally speaking, the contour curve of bulb part is more smooth, and one end that traditional web pass is not provided with bulb pass forms comparatively sharp-pointed corner angle, therefore, no matter it is flat-bulb steel pass or extruded flat-bulb steel blank, all decrease comparatively sharp-pointed corner angle, it is not easy to become the starting point of cracking, reduce the risk of structure crack。
It addition, described extrusion die 2 is provided with glass lubrication pad 3 towards the end face of described blank passage, described glass lubrication pad 3 is formed with the lubrication through hole 31 alignd with described flat-bulb steel pass thus fully exposing the entrance of described flat-bulb steel pass。As shown in Figure 3, lubrication through hole 31 can be slot, and the size being sized larger than described flat-bulb steel pass of this slot, namely lubricate the width horizontal maximum size more than the described flat-bulb steel pass shown in Fig. 2 of through hole 31, and lubricate the length longitudinal full-size more than the described flat-bulb steel pass shown in Fig. 2 of through hole 31。The surface that glass lubrication pad 3 exposes can partly be melted and get involved between described bar and described flat-bulb steel pass in extrusion process; play lubrication; the resistance of extruding can be reduced, and the internal face of the described flat-bulb steel pass of extrusion die 2 can be protected。
Specifically, described bar is made up of 00Cr21Ni14Mn5Mo3N, and this material exceeds about 20% compared to its plastic deformation pressure of common Ni rustless steel。Correspondingly, described production method uses described Hot Extrusion Equipment to process after including described bar is heated to processing temperature。Preferably, described processing temperature is 1180-1220 DEG C。Described processing temperature can be determined according to the material of material to be extruded and described recipient and extrusion die 2, it shall be guaranteed that plastic deformation can occur extrded material, and recipient and extrusion die 2 have bigger intensity and indeformable。
It addition, described production method includes processing extruded described flat-bulb steel blank air cooling。Described flat-bulb steel blank was heated to described processing temperature by preheating furnace before extruded, can use the method for air cooling that described flat-bulb steel blank is cooled to room temperature after extruded。It is of course also possible to take water-cooled, the cooling means such as air-cooled according to the difference of material and the difference of required target metallographic structure。
It addition, the described flat-bulb steel blank that described production method includes after air cooling is processed carries out solution treatment, the temperature of described solution treatment is 1000-1100 DEG C, and temperature retention time is 30-40 minute。Pass through solution treatment, it is possible to make various phases in alloy fully dissolve, Intensive intervention body, and improve toughness and etch resistant properties, eliminate stress and softening, in order to continue processing or molding。
In addition, extruded described flat-bulb steel blank is the beams with certain length, higher temperature it is heated to during due to extrusion process, after leaving extrusion die 2, owing to the action of gravity of self is likely to be formed bending, it is necessary to align, therefore, described production method includes, by seven-roll Abramsen machine, extruded described flat-bulb steel blank is applied tensile force and torsion, to align described flat-bulb steel blank。As it has been described above, when bulb pass 21 is positioned at the homonymy of web pass 22 with when the homonymy of web pass 22 is prominent, described flat-bulb steel pass is axially symmetric structure, and correspondingly, described flat-bulb steel blank is axially symmetric structure。In traditional processing technique, owing to flat-bulb steel is unsymmetric structure, it is impossible to by described seven-roll Abramsen machine, it is applied symmetrical active force, therefore, the power applied due to web 11 both sides is asymmetric, it is easy to causes flat-bulb steel generation laterally offset or bending, brings very big inconvenience to straightening operation；And in the operating procedure of the present invention, described flat-bulb steel blank can be applied symmetrical tensile force and torsion by seven-roll Abramsen machine, it is to avoid described flat-bulb steel blank generation laterally offset or bending。
It addition, the width of described web pass 22 is more than the width of the web 12 of described flat-bulb steel 1。Herein, the length that width is the longitudinal direction shown in Fig. 2 of described web pass 22, and described web pass 22 can be defined as the thickness of web pass 22 in the length of the horizontal direction shown in Fig. 2；The width of web 12 is the length of the horizontal direction shown in Fig. 1。As mentioned above, described flat-bulb steel blank requires over cutting operation and cuts away one of them bulb 11 and make flat-bulb steel 1, therefore, the width of described flat-bulb steel blank median ventral plate part can " slightly " more than the width of the web 11 of flat-bulb steel 1, reserve allowance。It addition, the quality of two bulbs 11 can be selected to cut during cutting, for instance can select to cut away the bulb 11 that there is surface defect；And, when one of them bulb pass 21 of extrusion die 2 exist on a small quantity inconspicuous (but affecting extrusion blank quality) damaged time, the bulb 11 cutting away correspondence can continue to use this extrusion die 2, as long as because can obtain qualified flat-bulb steel 1。
Specifically, the extruding driving force of described Hot Extrusion Equipment is 3000-3500 ton。This extruding driving force is mainly used in common Ni rustless steel, not for 00Cr21Ni14Mn5Mo3N bar particular design, namely can not be processed the flat-bulb steel of this kind of material by traditional method, and the improvement of extrusion die is also proposed for this problem by the present invention just。Certainly, most strength of materials is strengthened to the extruding driving force deficiency problem brought, or be owing to the bearing capacity of extrusion equipment is limited rather than improves the problem of extruding driving force, the mentality of designing of the present invention can be used for reference。
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing; but; the present invention is not limited to the detail in above-mentioned embodiment; in the technology concept of the present invention; technical scheme can being carried out multiple simple variant, these simple variant belong to protection scope of the present invention。
It is further to note that, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, it is possible to be combined by any suitable mode, in order to avoid unnecessary repetition, various possible compound modes are no longer illustrated by the present invention separately。
Additionally, can also carry out combination in any between the various different embodiment of the present invention, as long as it is without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally。
Claims (10)
1. the production method of a flat-bulb steel, it is characterized in that, flat-bulb steel (1) includes web (12) and bulb (11), described production method includes the bar using Hot Extrusion Equipment processing for preparing this flat-bulb steel (1), wherein, described Hot Extrusion Equipment includes the recipient and the extrusion die (2) that are connected to each other, described recipient is formed and holds the blank passage that described bar is moved through, described extrusion die (2) blocks the port of export of described blank passage, and described extrusion die (2) is formed with through flat-bulb steel pass on the end face of described blank passage, described flat-bulb steel pass includes web pass (22) and is positioned at the bulb pass (21) at this web (12) pass two ends, thereby through described flat-bulb steel pass, described bar extruding is shaped to the flat-bulb steel blank with two described bulbs (11), and the width of the web (12) according to described flat-bulb steel (1) makes described flat-bulb steel (1) by cutting away one of them described bulb (11)。
2. production method according to claim 1, it is characterized in that, described extrusion die (2) is provided with glass lubrication pad (3) towards the end face of described blank passage, and described glass lubrication pad (3) is formed with the lubrication through hole (31) alignd with described flat-bulb steel pass thus fully exposing the entrance of described flat-bulb steel pass。
3. production method according to claim 1, it is characterised in that described bar is made up of 00Cr21Ni14Mn5Mo3N。
4. production method according to claim 3, it is characterised in that described production method uses described Hot Extrusion Equipment to process after including described bar is heated to processing temperature。
5. production method according to claim 4, it is characterised in that described processing temperature is 1180-1220 DEG C。
6. production method according to claim 4, it is characterised in that described production method includes processing extruded described flat-bulb steel blank air cooling。
7. production method according to claim 6, it is characterised in that the described flat-bulb steel blank that described production method includes after air cooling is processed carries out solution treatment, and the temperature of described solution treatment is 1000-1100 DEG C, and temperature retention time is 30-40 minute。
8. production method according to claim 7, it is characterised in that described production method includes, by seven-roll Abramsen machine, extruded described flat-bulb steel blank is applied tensile force and torsion, to align described flat-bulb steel blank。
9. production method according to claim 1, it is characterised in that the width of described web pass (22) is more than the width of the web (12) of described flat-bulb steel (1)。
10. production method according to claim 1, it is characterised in that the extruding driving force of described Hot Extrusion Equipment is 3000-3500 ton。
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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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108421839A (en) * | 2018-05-28 | 2018-08-21 | 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 |
| CN109261714A (en) * | 2018-09-05 | 2019-01-25 | 鞍钢股份有限公司 | A kind of milling method of the symmetrical flat-bulb steel of 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 |
| CN115041784A (en) * | 2022-07-26 | 2022-09-13 | 广船国际有限公司 | Butt welding method for non-equal-height flat bulb steel |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421839A (en) * | 2018-05-28 | 2018-08-21 | 山西太钢不锈钢股份有限公司 | A kind of flat-bulb steel diplopore model extrusion method |
| 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 |
| CN109261714A (en) * | 2018-09-05 | 2019-01-25 | 鞍钢股份有限公司 | A kind of milling method of the symmetrical flat-bulb steel of large shipbuilding |
| 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 |
| CN115041784A (en) * | 2022-07-26 | 2022-09-13 | 广船国际有限公司 | Butt welding method for non-equal-height flat bulb steel |
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| CN105690045B (en) | 2017-11-28 |
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