CN100491063C - Method for producing metallurgically binding metal composite seamless pipe - Google Patents
Method for producing metallurgically binding metal composite seamless pipe Download PDFInfo
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- CN100491063C CN100491063C CNB2006101132709A CN200610113270A CN100491063C CN 100491063 C CN100491063 C CN 100491063C CN B2006101132709 A CNB2006101132709 A CN B2006101132709A CN 200610113270 A CN200610113270 A CN 200610113270A CN 100491063 C CN100491063 C CN 100491063C
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Abstract
The present invention belongs to the field of seamless steel pipe producing technology, and is especially production process of seamless composite metal pipe with metallurgical binding. The production process includes the following steps: heating the composite pipe blank in an induction heating furnace, hot extruding the composite pipe blank in an extruder for different metal layers to deform synchronously and homogeneously and to form the metallurgical binding between the different layers, annealing in an annealing furnace, straightening, end cutting and lengthing, and packing. The seamless composite metal pipe with metallurgical binding has low production cost.
Description
Technical field
The invention belongs to the seamless steel pipe technical field, particularly a kind of manufacture method with metal composite seamless pipe of metallurgical binding.
Background technology
Multiple tube is to be made of two or more different materials, and a kind of material is interior, and another kind of material is outside it; In conjunction with closely, be subjected to external force to do the time spent between the pipe layer, two or more material pipe is out of shape simultaneously.The multiple tube that is made of different ectonexine materials has different purposes widely.That multiple tube is applied to require is high temperature resistant, high pressure resistant, corrosion-resistant, prevent to corrode the fracture that causes or antirust, attractive in appearance and wear-resisting place.In oil plant and chemical industry, multiple tube can be used for crude oil pipeline, heating furnace pipeline and checks with jet pipe etc.; In water and Seawater Treatment, multiple tube can be used for desalinization process units and hydroelectric generation with aqueduct etc.; In object was carried, multiple tube can be used for crude oil, gas delivering pipe, corrosion resistance pipeline and carries ore pipeline etc.; In heat was transported, multiple tube can be used for waste liquid recovery channel, process units pipe arrangement and lime liquefaction process units etc.A large amount of stainless steel, titanium, copper, nickel, chromium and a small amount of other precious metal seamless pipes of adopting in these industries are costly all the time.Therefore, all kinds of multiple tubes have obtained increasing research and application.
The manufacture method of metal current composite seamless pipe roughly has following three kinds: interior expanding type, outer tube reducing type and castable.(1) interior expanding type, that is: adopt the seamless pipe of two kinds of materials to wear (straight carbon steel seamless steel pipe as outer tube adopts mutually, in wear a thin-wall stainless steel as the inner layer metal pipe), high-pressure in interior pipe, make the outer seamless pipe of internal layer seamless pipe generation plastic deformation only produce strain, thereby pipe is combined closely with outer tube in making, and forms the bimetallic composite seamless pipe; (2) outer tube reducing type that is: still adopts the seamless pipe of two kinds of materials to wear mutually, and outer tube is carried out tube reducing drawing or rolling, and pipe is combined closely with outer tube in making, and forms the bimetallic composite seamless pipe.More than the weak point of metal composite seamless pipe of two kinds of explained hereafter be that A, production cost are high, inner and outer pipes all must adopt ready-made hot rolling or cold-drawing seamless pipe, adds that thereafter internal expanding or tube reducing operation rise its manufacturing cost significantly.B, above two types seamless pipe are not the metal composite on the complete meaning.Double layer of metal there is no metallurgical melting each other, and double layer of metal is difficult to transmit and balanced external force inside and outside being subjected under the situation of axial force; In the application that needs heat is transmitted, owing to have the gap between inside and outside double layer of metal, thermal resistance will increase considerably; (3) the as cast condition seamless steel pipe that obtains by laminated pouring with metallurgical fusion interface.Though this class seamless steel pipe can be realized metallurgical binding at the interface and eliminate the deficiency of above two kinds of technologies, owing to the thermal deformation that does not have thereafter, only limits to as cast condition and uses, its thick as-cast structure causes the mechanical performance of each layer metal not give full play to.This technology also is difficult to directly produce thin-walled and small-bore seamless pipe, and its environment for use is subjected to very big restriction.
Summary of the invention
The objective of the invention is to: a kind of manufacture method with metal composite seamless pipe of metallurgical binding is provided.
The present invention adopts a kind of manufacture method with metal composite seamless pipe of metallurgical binding, at first the centrifugal casting composite pipe blank is put into induction heater and heats; Again the composite pipe blank after the heating is carried out hot extrusion on extruder, make each layer metal reach synchronous homogeneous deformation, make metal composite seamless pipe with metallurgical binding; Metal composite seamless pipe is put into annealing furnace carry out high temperature diffusion annealing, make it have desired serviceability and processing performance; Aligning, crop and scale are packed warehouse-in at last.Processing step is:
1, select corresponding double-decker centrifugal casting composite pipe blank for use according to the purposes and the specification of required metal composite pipe, multiple layer thickness is 1/4～1/2 of total wall thickness;
2, metal composite pipe blank is carried out ring-like stove preheating earlier, in induction heater, heat then; Final heating-up temperature: 1050 ℃～1250 ℃;
3, the composite pipe blank after will heating is sent into extruder and is carried out hot extrusion; A compress variation 40%～55%, total compress variation is controlled at 70%～95%; It is loose to make each layer metal material eliminate as cast condition through hot extrusion, the grain size of each layer of refinement metal structure;
4, will send into through the metal composite pipe of hot extrusion and carry out high temperature diffusion annealing in the annealing furnace.Diffusion annealing temperature: 830 ℃～1050 ℃, can be expressed as Ac
3± 50 ℃, annealing temperature retention time: 2～4h;
5, the metal composite pipe after the aligning heat treatment is removed burr, crop, scale;
6, check, finishing at last carried out surface finish with polishing machine with metal composite seamless pipe, with packing warehouse-in behind the end facing machine milling head.
Advantage of the present invention have following some:
A. the hot extrusion technique among the present invention can improve the grain structure of each layer of multiple tube well, thereby improves the combination property of metal composite seamless pipe;
B. the metal composite seamless pipe wall thickness of the inventive method manufacturing can reach 2.5～30mm, and multiple layer wall thickness is 1/4～1/2 of gross thickness;
C. on compound interface without any intermediate flux, this has not only reduced manufacturing cost, nor can be because do not select suitable intermediate flux to reduce interface bond strength between composite bed, and influences the combination property of metal composite seamless pipe;
D. the metal composite seamless pipe external diameter of the inventive method manufacturing is Φ 25～Φ 219mm;
E. the inventive method can be produced the composite seamless pipe of multiple metal, can also the seamless square tube of production metal composite, the hollow profile shapes of shape tube such as metal rectangular seamless pipe and other complicated shapes.
With the specific embodiment the present invention is carried out concrete elaboration explanation in conjunction with the accompanying drawings.
Description of drawings:
Fig. 1 is a structural front view.Wherein, skin 1, internal layer 2.
Fig. 2 is the vertical view of Fig. 1.
The specific embodiment
Specific embodiment of the invention step is as follows:
Example 1
1, presses the purposes and the specification of metal composite seamless pipe, select double-decker centrifugal casting composite pipe blank for use.Outer 1 is carbon steel 20Cr, and internal layer 2 is a stainless steel 304, and the stainless thickness of internal layer is 1/4 of total wall thickness;
2, metal composite pipe blank is carried out ring-like stove preheating earlier, in induction heater, heat then; Final heating-up temperature is 1050 ℃;
3, the composite pipe blank after will heating is sent into extruder and is carried out hot extrusion; Total compress variation is 70%;
4, will send into through the metal composite pipe of hot extrusion and carry out high temperature diffusion annealing in the annealing furnace.The diffusion annealing temperature is 830 ℃, and the annealing temperature retention time is 2 hours;
5, the metal composite seamless pipe after the aligning heat treatment is removed burr, crop, scale;
6, check, finishing are carried out surface finish with polishing machine with multiple tube, with packing warehouse-in behind the end facing machine milling head.
Example 2
1, presses the purposes and the specification of metal composite seamless pipe, select double-decker centrifugal casting composite pipe blank for use.Outer 1 is stainless steel 304, and internal layer 2 is a stainless steel 316, and the thickness of internal layer stainless steel 316 is 1/2 of total wall thickness;
2, metal composite pipe blank is carried out ring-like stove preheating earlier, in induction heater, heat then; Final heating-up temperature is 1150 ℃;
3, the composite pipe blank after will heating is sent into extruder and is carried out hot extrusion.Total compress variation is 95%;
4, will send into through the metal composite pipe of hot extrusion and carry out high temperature diffusion annealing in the annealing furnace; The diffusion annealing temperature is 1050 ℃, and the annealing temperature retention time is 4 hours;
5, the metal composite seamless pipe after the aligning heat treatment is removed burr, crop, scale;
6, check, finishing are carried out surface finish with polishing machine with multiple tube, with packing warehouse-in behind the end facing machine milling head.
Example 3
1, presses the purposes and the specification of metal composite seamless pipe, select double-decker centrifugal casting composite pipe blank for use.Outer 1 is low-alloy steel 35CrMo, and internal layer 2 is high-temperature alloy steel 0Cr 13Mo, and the thickness of internal layer high-temperature alloy steel is 1/3 of total wall thickness;
2, metal composite pipe blank is carried out ring-like stove preheating earlier, in induction heater, heat then; Final heating-up temperature is 1250 ℃;
3, the composite pipe blank after will heating is sent into extruder and is carried out hot extrusion; Total compress variation is 80%;
4, will send into through the metal composite pipe of hot extrusion and carry out high temperature diffusion annealing in the annealing furnace; The diffusion annealing temperature is 950 ℃, and the annealing temperature retention time is 3 hours;
5, the metal composite seamless pipe after the aligning heat treatment is removed burr, crop, scale;
6, check, finishing are carried out surface finish with polishing machine with multiple tube, with packing warehouse-in behind the end facing machine milling head.
Claims (1)
1, a kind of manufacture method with metal composite seamless pipe of metallurgical binding is at first put into induction heater with the centrifugal casting composite pipe blank and is heated; Again the composite pipe blank after the heating is carried out hot extrusion on extruder, make each layer metal reach synchronous homogeneous deformation, make metal composite seamless pipe with metallurgical binding; Metal composite seamless pipe is put into annealing furnace carry out diffusion annealing; Aligning, crop and scale are packed warehouse-in at last; Technology is:
A, select corresponding double-decker centrifugal casting composite pipe blank for use according to the purposes and the specification of required metal composite pipe, multiple layer thickness is 1/4～1/2 of total wall thickness;
B, metal composite pipe blank is carried out ring-like stove preheating earlier, in induction heater, heat then, final heating-up temperature: 1050 ℃～1250 ℃;
C, the composite pipe blank after will heating are sent into extruder and are carried out hot extrusion, a compress variation 40%～55%, and total compress variation is controlled at 70%～95%; It is loose to make each layer metal material eliminate as cast condition through hot extrusion, the grain size of each layer of refinement metal structure;
D, will send into through the metal composite pipe of hot extrusion and carry out high temperature diffusion annealing in the annealing furnace; Diffusion annealing temperature: 830 ℃～1050 ℃, be expressed as Ac
3± 50 ℃, annealing temperature retention time: 2～4h;
Metal composite pipe after e, the aligning heat treatment is removed burr, crop, scale;
F, check, finishing are carried out surface finish with polishing machine with metal composite seamless pipe, with packing warehouse-in behind the end facing machine milling head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101132709A CN100491063C (en) | 2006-09-21 | 2006-09-21 | Method for producing metallurgically binding metal composite seamless pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101132709A CN100491063C (en) | 2006-09-21 | 2006-09-21 | Method for producing metallurgically binding metal composite seamless pipe |
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| CN1943979A CN1943979A (en) | 2007-04-11 |
| CN100491063C true CN100491063C (en) | 2009-05-27 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101077B (en) * | 2007-08-03 | 2010-09-22 | 攀钢集团攀枝花钢铁研究院 | Rustless steel double-metal composite pipe and making method thereof |
| CN102553961B (en) * | 2010-12-14 | 2014-05-14 | 张皓 | Compound pipe manufacturing technology for metallurgically bonding anti-corrosion special alloy lining with pipeline steel outer sleeve |
| CN102294456B (en) * | 2011-08-16 | 2013-03-27 | 新兴铸管股份有限公司 | Manufacturing method for oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank |
| CN102527766A (en) * | 2011-10-28 | 2012-07-04 | 刘建彬 | Manufacture method for high-alloy seamless pipe |
| CN102672438B (en) * | 2012-06-04 | 2014-12-31 | 新兴铸管股份有限公司 | Process for producing metallurgical composite double metal seamless steel pipe |
| CN103231209A (en) * | 2013-04-11 | 2013-08-07 | 新兴铸管股份有限公司 | Method for producing vacuum-embedded metallurgical composite bimetal seamless tube |
| CN103691761B (en) * | 2013-12-20 | 2016-05-18 | 河北宏润核装备科技股份有限公司 | A kind of method of utilizing extrusion equipment to manufacture Large Diameter Pipeline seamless tubular goods |
| CN103785706A (en) * | 2014-02-12 | 2014-05-14 | 攀钢集团江油长城特殊钢有限公司 | Manufacturing method of alloy steel section tubes |
| CN103920743B (en) * | 2014-04-18 | 2016-02-03 | 新兴铸管股份有限公司 | A kind of production method of less-deformable alloy composite double layer tubing |
| CN104874761A (en) * | 2015-02-04 | 2015-09-02 | 四川鑫鼎新材料有限公司 | Metallurgy composite production method of oil-gas field pipeline steel pipe |
| CN105171344B (en) * | 2015-08-28 | 2017-11-14 | 风范绿色建筑（常熟）有限公司 | A kind of preparation method of square steel tube |
| CN105499304A (en) * | 2015-12-08 | 2016-04-20 | 昆明理工大学 | Semi-solid forming method of composite pipe |
| CN109972048B (en) * | 2018-05-25 | 2021-03-26 | 中国科学院金属研究所 | FeCrAl alloy and ferrite/martensite heat-resistant steel composite tube for nuclear fuel cladding of nuclear reactor and preparation method thereof |
| CN110181230B (en) * | 2019-05-28 | 2022-01-04 | 中国石油天然气集团有限公司 | Bimetal metallurgy composite pipe and preparation method thereof |
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Non-Patent Citations (3)
| Title |
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| 简明轧钢手册. 叶建林，317，冶金工业出版社. 1959 * |
| 钢铁热处理. 安正昆，128-129，机械工业出版社. 1985 简明轧钢手册. 叶建林，317，冶金工业出版社. 1959 |
| 钢铁热处理. 安正昆，128-129，机械工业出版社. 1985 * |
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