CN105567940A - Method for improving flaring and bending deformation resisting capacity of metal pipe - Google Patents
Method for improving flaring and bending deformation resisting capacity of metal pipe Download PDFInfo
- Publication number
- CN105567940A CN105567940A CN201510980635.7A CN201510980635A CN105567940A CN 105567940 A CN105567940 A CN 105567940A CN 201510980635 A CN201510980635 A CN 201510980635A CN 105567940 A CN105567940 A CN 105567940A
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- China
- Prior art keywords
- tubing
- heating
- pipe
- metal pipe
- chuck
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/52—Methods of heating with flames
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention belongs to the field of metal pipe machining, and particularly relates to a method for improving flaring and bending deformation resisting capacity of a metal pipe. The method is characterized in that the two ends of the pipe are each clamped by a chuck, and torque is applied to the pipe; a circumferential annular heating area around the pipe is generated by a heating source moving in the axial direction of the pipe, and the heating temperature of the heating area is controlled; along with rise of the heating temperature, the strength of a metal material in the heating area is reduced, under the action of the torque, the pipe in the area is subjected to torsional deformation in the circumferential direction, and an original longitudinal fiber structure is changed into an inclined fiber structure; and the heating source is gradually moved to the other end of the pipe from one end of the pipe till the whole pipe is changed to be of the inclined fiber structure. According to the method, the circumferential performance of the material is remarkably improved, and the deformation and flaring resisting capacity is remarkably improved. Due to the fact that the fiber structure formed in the machining process has heredity, the method can be used as a procedure for improving the structure in the machining process, and the structural performance of the finished pipe can also be improved.
Description
Patent field
The invention belongs to metal pipe material manufacture field, particularly relate to a kind of method improving the anti-enlarging crooked deformability of metal pipe material.
Background technology
Various high-performance metal tubing is the important materials in national economy and defence and military activity, as various conduit under fluid pressure and gas transmission pipeline etc.A lot of metal pipe material will bear the operating pressure and structural stress etc. of inside and outside medium at work, also will bear the distortion such as bending, enlarging when mounted, therefore very high to the especially circumferential performance requriements of the performance of tubing.Usually adopt the machining deformation methods such as extruding, drawing, rolling to prepare metal pipe material, in these courses of processing, the distortion of metal is all along tubing longitudinal direction, and the pipe deformations tissue of formation is longitudinal fiber tissue more.Because fibrous tissue has obvious performance directivity, namely along the performance in elongate fiber direction apparently higher than the performance perpendicular to fiber direction, cause the circumferential performance of tubing lower than its longitudinal performance.Although the overall performance of material is good, the circumferential performance of tubing in a lot of situation, especially plasticity index is not high enough, does not reach the application requiring such as bending pipes, enlarging.
Summary of the invention
In order to solve the problem, the present invention proposes a kind of method improving the anti-enlarging crooked deformability of metal pipe material, it is characterized in that, detailed process is:
Step 1, the first chuck 1 and the second chuck 2 clamp the two ends of tubing 3 respectively, and apply moment of torsion by the first chuck 1 and the second chuck 2 pairs of tubing, this moment of torsion will ensure that tubing, under Current Temperatures, viscous deformation or unstability does not occur;
Step 2, the heating source 4 moved axially along tubing with, produce the circumferential annular outer heating zone along tubing, controls to heat the Heating temperature in region, and this Heating temperature ensures that the new component that material property can be caused to worsen does not appear in material;
Step 3, rising with Heating temperature, the strength degradation of the metallic substance in heating region, under the effect of moment of torsion, there is the circumferential torsional deformation along tubing in the metallic substance in heating region, after this region tubing original longitudinal fiber tissue becomes oblique fibrous tissue, formative tissue distorted area;
Step 4, heating source 4 is shifted to the other end gradually from tubing 3 one end, along with heating region constantly movement, the metaplasia district of tubing 3 also constantly expansion until whole tubing 3 longitudinal fiber tissue becomes oblique fibrous tissue.
Install one in the middle of described tubing 3 and support plug, prevent tubing unstability in twist process.
Described tubing 3, keeping rotating under the drive at the first chuck 1 and the second chuck 2 under suffered torque condition, makes heating and distortion evenly.
Described heating source 4 is ring type or point type, heats tubing by the mode of induction heating or flame heating.
Described heating source 4 rear portion increases the water with heating source movement or air cooling source, can more accurately control heat distortion region like this.
Describedly cause the new Group of material final utilization penalty to divide to comprise low melting point tissue and harmful phase.
Beneficial effect
The present invention utilizes torsion method, makes the longitudinal fiber tissue of tubing become oblique fibrous tissue, makes the circumferential performance of material be able to obvious lifting, resistance to deformation and the obvious grow of enlarging ability.Because the fibrous tissue formed in the course of processing has heredity, present method as the procedure improving tissue in the course of processing, also can improve a kind for the treatment of process of structure property as finished product tubing.
Accompanying drawing explanation
Fig. 1 is the schema of method proposed by the invention;
Fig. 2 is the structure iron of method proposed by the invention.
1-first chuck, 2-second chuck, 3-tubing, 4-heating source.
Embodiment
Below in conjunction with Figure of description and two groups of specific embodiments, the present invention will be further described.
Example one
Produce the aluminium-alloy pipe of wall thickness 2mm diameter 120mm, require its longitudinal strength performance 225MPa, the processing requirement of enlarging to diameter 150mm can be born.Usually the technique doing this tubing is: first prepare the thick pipe of 10mm with pressing method, obtains the tubing of wall thickness 2mm by repeatedly drawing, then obtains finished product tubing through thermal treatment adjustment structure property.But because the fibrous tissue formed in the whole course of processing is longitudinal direction, when when thermal treatment, its longitudinal strength performance reaches 225MPa, its circumferential performance, especially plastic property is not high, often do not reach the requirement of enlarging to diameter 150mm, cause scrap rate very high, wherein require that the scrap rate caused reaches more than 50% because enlarging does not reach.
Use the inventive method, tube-drawing be worked into wall thickness 5 ?6mm time, increase and reverse treating processes.Be clipped in by tubing between two chucks, two chucks apply moment of torsion to tubing and drive tubing to rotate, and also combine to be rotated on tubing to form annular outer heating zone with flame.From tubing one end, control the Heating temperature of heating region at 300 degrees Celsius, apply moment of torsion and increase gradually, until obvious Plastic Torsion occurs tubing heating region.Keep torque, heating source is axially moved to the tubing the other end gradually along tubing, makes heating and distorted area by whole tubing.Complete and reverse treating processes and continue follow-up processing and heat treatment process obtains finished product tubing.
Due to through reversing process, the longitudinal fiber tissue of whole tubing becomes oblique tissue, and the circumferential performance of tubing is improved raising.The anti-enlarging deformability of tubing is strengthened, and the scrap rate caused because enlarging does not reach requirement is lower than 10%.
Example two
Produce wall thickness 1.5mm diameter 200mm nickel-based alloy pipe, use rolling method tubulation, its performance is adjusted with thermal treatment, ensure its yield strength >350MPa, tensile strength >780MPa, the deformabilities such as cross directional stretch plasticity index can only reach about 15%, counter-bending expansion product are not strong.
Use the inventive method, before heat treatment, increase and reverse treating processes.Be clipped in by tubing between two chucks, two chucks apply the hoop moment of torsion of 3000N.m to tubing, form heating ring with induction heating on tubing.Control heating region to heat up gradually, temperature rises to certain phase, and obvious Plastic Torsion occurs tubing heating region.From tubing one end, heating source is axially moved to the tubing the other end gradually along tubing, makes heating and distorted area by whole tubing, complete torsion treating processes.Suitably adjust heat treating regime yield strength >350MPa when reaching again, while tensile strength >780MPa, cross directional stretch plastic property reaches 25%, and the deformabilities such as tubing is counter-bending, enlarging strengthen greatly.
Claims (6)
1. improve a method for the anti-enlarging crooked deformability of metal pipe material, it is characterized in that, detailed process is:
Step 1, the first chuck (1) and the second chuck (2) clamp the two ends of tubing (3) respectively, apply moment of torsion by the first chuck (1) and the second chuck (2) to tubing (3), this moment of torsion will ensure that tubing (3), under Current Temperatures, viscous deformation or unstability does not occur;
Step 2, the heating source (4) moved axially along tubing (3) with, produce the circumferential annular outer heating zone along tubing (3), control to heat the Heating temperature in region, this Heating temperature ensures that the new component that can cause material final utilization penalty does not appear in material;
Step 3, rising with Heating temperature, the strength degradation of the metallic substance in heating region, under the effect of moment of torsion, there is the circumferential torsional deformation along tubing in the metallic substance in heating region, after this region tubing original longitudinal fiber tissue becomes oblique fibrous tissue, formative tissue distorted area;
Step 4, heating source (4) is shifted to the other end gradually from tubing (3) one end, along with heating region constantly movement, the metaplasia district of tubing (3) also constantly expands until whole tubing (3) longitudinal fiber tissue becomes oblique fibrous tissue.
2. a kind of method improving the anti-enlarging crooked deformability of metal pipe material according to claim 1, is characterized in that, installs one and supports plug, prevent tubing unstability in twist process in the middle of described tubing (3).
3. a kind of method improving the anti-enlarging crooked deformability of metal pipe material according to claim 1, it is characterized in that, described tubing (3) is keeping rotating under the drive at the first chuck (1) and the second chuck (2) under suffered torque condition, make heating and distortion even.
4. a kind of method improving the anti-enlarging crooked deformability of metal pipe material according to claim 1, it is characterized in that, described heating source (4) is ring type or point type, heats tubing by the mode of induction heating or flame heating.
5. a kind of method improving the anti-enlarging crooked deformability of metal pipe material according to claim 1, it is characterized in that, described heating source (4) rear portion increases the water with heating source movement or air cooling source, can more accurately control heat distortion region like this.
6. a kind of method improving the anti-enlarging crooked deformability of metal pipe material according to claim 1, is characterized in that, described in cause the new component of material final utilization penalty to comprise low melting point tissue and harmful phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510980635.7A CN105567940B (en) | 2015-12-23 | 2015-12-23 | A kind of method for improving the anti-enlarging crooked deformability of metal pipe material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510980635.7A CN105567940B (en) | 2015-12-23 | 2015-12-23 | A kind of method for improving the anti-enlarging crooked deformability of metal pipe material |
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| Publication Number | Publication Date |
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| CN105567940A true CN105567940A (en) | 2016-05-11 |
| CN105567940B CN105567940B (en) | 2017-08-25 |
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| CN201510980635.7A Active CN105567940B (en) | 2015-12-23 | 2015-12-23 | A kind of method for improving the anti-enlarging crooked deformability of metal pipe material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182084A (en) * | 2021-12-10 | 2022-03-15 | 西安交通大学 | Method for eliminating anisotropy of pressure processing metal pipe |
| CN114350920A (en) * | 2022-03-18 | 2022-04-15 | 南通铁人运动用品有限公司 | Equipment and production process for improving flaring bending deformation resistance of metal pipe |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5248513A (en) * | 1975-10-16 | 1977-04-18 | Nippon Kokan Kk <Nkk> | Heating method of large diameter steel pipe |
| US4171634A (en) * | 1977-09-29 | 1979-10-23 | Spiral Tubing Corporation | Method of making corrugated tubing with graduated pitch |
| CN1179999A (en) * | 1996-08-28 | 1998-04-29 | 肯尼制造公司 | Apparatus and method for twisting hollow rods |
| JP2005134100A (en) * | 2003-10-08 | 2005-05-26 | Matsushita Electric Ind Co Ltd | Method for manufacturing heat exchanger device |
| CN1772408A (en) * | 2004-11-10 | 2006-05-17 | 钟旻儒 | Hollow metal pipe twisting formation method |
| CN102560287A (en) * | 2012-03-02 | 2012-07-11 | 中国石油集团渤海石油装备制造有限公司 | X90 steel bent pipe and bending method thereof |
| CN102560298A (en) * | 2012-02-29 | 2012-07-11 | 天津锐新昌轻合金股份有限公司 | Heat treatment method particularly applicable to spinning plastic forming of aluminum alloy extruded tube |
| CN203370889U (en) * | 2013-07-19 | 2014-01-01 | 北京智创联合科技有限公司 | Induction heating torsion system |
| CN104625652A (en) * | 2015-01-24 | 2015-05-20 | 重庆西重特种铝业有限公司 | Spinning drawing forming technology of oval convergent pipe and spinning device for spinning drawing forming technology of oval convergent pipe |
-
2015
- 2015-12-23 CN CN201510980635.7A patent/CN105567940B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5248513A (en) * | 1975-10-16 | 1977-04-18 | Nippon Kokan Kk <Nkk> | Heating method of large diameter steel pipe |
| US4171634A (en) * | 1977-09-29 | 1979-10-23 | Spiral Tubing Corporation | Method of making corrugated tubing with graduated pitch |
| CN1179999A (en) * | 1996-08-28 | 1998-04-29 | 肯尼制造公司 | Apparatus and method for twisting hollow rods |
| JP2005134100A (en) * | 2003-10-08 | 2005-05-26 | Matsushita Electric Ind Co Ltd | Method for manufacturing heat exchanger device |
| CN1772408A (en) * | 2004-11-10 | 2006-05-17 | 钟旻儒 | Hollow metal pipe twisting formation method |
| CN102560298A (en) * | 2012-02-29 | 2012-07-11 | 天津锐新昌轻合金股份有限公司 | Heat treatment method particularly applicable to spinning plastic forming of aluminum alloy extruded tube |
| CN102560287A (en) * | 2012-03-02 | 2012-07-11 | 中国石油集团渤海石油装备制造有限公司 | X90 steel bent pipe and bending method thereof |
| CN203370889U (en) * | 2013-07-19 | 2014-01-01 | 北京智创联合科技有限公司 | Induction heating torsion system |
| CN104625652A (en) * | 2015-01-24 | 2015-05-20 | 重庆西重特种铝业有限公司 | Spinning drawing forming technology of oval convergent pipe and spinning device for spinning drawing forming technology of oval convergent pipe |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182084A (en) * | 2021-12-10 | 2022-03-15 | 西安交通大学 | Method for eliminating anisotropy of pressure processing metal pipe |
| CN114350920A (en) * | 2022-03-18 | 2022-04-15 | 南通铁人运动用品有限公司 | Equipment and production process for improving flaring bending deformation resistance of metal pipe |
| CN114350920B (en) * | 2022-03-18 | 2022-05-24 | 南通铁人运动用品有限公司 | Equipment and production process for improving flaring bending deformation resistance of metal pipe |
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| Publication number | Publication date |
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| CN105567940B (en) | 2017-08-25 |
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Effective date of registration: 20190830 Address after: 101407 Beijing city Huairou District Yanqi Economic Development Zone Branch Hing Street No. 11 Patentee after: Research Institute of engineering and Technology Co., Ltd. Address before: 100088 Beijing city Xicheng District Xinjiekou Avenue No. 2 Patentee before: General Research Institute for Nonferrous Metals |
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Effective date of registration: 20210716 Address after: 101400 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Youyan metal composite technology Co.,Ltd. Address before: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee before: YOUYAN ENGINEERING TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |
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