CN104191182A - Production method of totally-coated metal composite pipe - Google Patents
Production method of totally-coated metal composite pipe Download PDFInfo
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- CN104191182A CN104191182A CN201410485316.4A CN201410485316A CN104191182A CN 104191182 A CN104191182 A CN 104191182A CN 201410485316 A CN201410485316 A CN 201410485316A CN 104191182 A CN104191182 A CN 104191182A
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- tube
- titanium
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- pipe
- composite pipe
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Classifications
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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
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/08—Coatings characterised by the materials used by metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
- F16L9/04—Reinforced pipes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
A production method of a totally-coated metal composite pipe is technically characterized by including the steps of hermetically nesting a titanium tube, a steel tube and another titanium tube, connecting titanium heads to two ends of the steel tube in a threaded manner, and welding the inner titanium tube and the outer titanium tube on the titanium heads to ensure the steel tube is completely coated with titanium integrally; performing rolling, combining, rounding, straightening, deheading and sizing to obtain a finished product. According to the method, the totally-coated metal composite pipe is manufactured by a cold-rolling method. In terms of oil exploitation, chemical industry, fine chemicals, heat exchangers and marine pipelining, the composite pipe is completely coated with the titanium to keep properties of the titanium, product strength is guaranteed by using a low-cost base steel tube as a structural portion, the titanium heads at two ends can be connected by welding, and a screw thread can also be made for mechanical connection. The totally-coated metal composite pipe has the advantages such that the performance is high, the cost is low, the service life is long, and applicable range is wide. The production method is insusceptible to seasons and free of environmental pollution, and production scale and product specification are controllable.
Description
Technical field
The present invention relates to a kind of metal composite pipe material technical field, specifically a kind of production method of full clad metal multiple tube.
Background technology
Metal pipe material application is very extensive, is mainly used in the conveying of gas and liquid, and a part is applied in metal structure.Application is at present at most steel pipe, stainless steel tube, copper pipe, aluminum pipe and titanium pipe.Because tubing is used extensively, also there are many problems.Outstanding is corrosion-resistant problem and strength problem.
In the oil exploitation of oil field, the acid ion in crude oil is a unsolved difficult problem for many years to pipe fitting corrosion, and the corrosion fracture of steel oil well casing often causes oil well to scrap, and ratio is at the more than 30% of abandoned well; Petroleum pipeline leaks, and sometimes bringing on a disaster property loss, such as petroleum pipeline is because leaking the blast causing.So the liquid state that the material of this type of pipe fitting must be able to be stood in woven hose corrodes.Ferrous materials, stainless steel material can not be resisted acid medium and corrode, and its safety problem is particularly outstanding.
Nuclear power station needs a large amount of cooling waters, is used for carrying out heat exchange.So nuclear power station is often based upon seashore, to facilitate, obtains seawater and carry out cooling.Steel pipe, stainless steel tube are used low to chloride ion corrosion barrier propterty at seawater, have to adopt external coating anti-corrosion material and thickening tube wall to extend the out-of-service time.
In large-scale power station generating equipment, have heat exchanger, using in a large number tubular heat exchanger, tubing is the important carrier of heat exchange.Traditional heat exchanger tube adopts the mild steel tubing on mild steel or process preservative treatment surface, because heat exchanger media often has corrosivity, tubular heat exchanger is because the reason of material is all very short service life, and maintenance and replacing new equipment had both affected the normal operation of production, increased again production cost.
At pharmacy and Fine Chemical, product line is transfer line coupled reaction still often, and most production mother liquors are acid mediums.The Material texture of woven hose, specification requirement can not with mother liquor generation chemical reaction.But steel pipe and stainless steel pipe are often not corrosion-resistant, carry out chemical reaction with mother liquor, the material that woven hose adopts does not often reach specification requirement, the serious product quality that affects.
At present, have the erosion that titanium can be resisted above-mentioned Korrosionsmedium only, the pipe part that titanium is made can solve the problem existing in above-mentioned production process well.
Titanium is a kind of silvery white metal, and tool metallic luster has good resistance to corrosion (comprising seawater, chloroazotic acid and chlorine), good high temperature resistant, low temperature resistant, anti-strong acid, anti-highly basic.Titanium high strength, low-density, be described as " space metal ".
Nearly decades, high-end fine chemistry industry enterprise has carried out technological transformation, adopt titanium pipe part as the structural member of transfer line, has fundamentally solved the hard nut to crack that mother liquor erode pipe pipe affects product quality and device security.Such as the former design of production of vitamin C line in pharmaceutical factory is stainless steel pipe as producing mother liquor feed-line, after operation, there is mother liquor severe contamination phenomenon, directly affect the quality of product.Analysis result is that stainless crome metal and nickel are added in mother liquor and cause.Carried out afterwards the transformation of production line material, and be all replaced by titanium metal material, the contaminated phenomenon of mother liquor occurs after operation never again, equipment operation is still normally worked so far.
The heat exchanger that titanium is made, has fundamentally solved the problem of safety in production, has improved heat exchange efficiency simultaneously.
Due to titanium resisting sea water erosion excellent performance, ocean engineering adopts titanium tubing in a large number in pipeline is carried at present.
Titanium pipe price is higher, and during engineering application, Cost Problems is particularly outstanding.
At present, conventional method making titanium steel multiple tube is mainly that blast is compound, manufactures also possibility of composite plate, but for the manufacture of titanium steel composite ti pipe, because manufacture craft is relatively difficult, production and yield rate are low, are difficult to suitability for industrialized production.
Summary of the invention
The production method that the object of this invention is to provide a kind of full clad metal multiple tube, to solve corrosion-resistant problem and the strength problem of above-mentioned metal pipe line.
The object of the invention is to be achieved through the following technical solutions: comprise the following steps:
1) processing of composite pipe blank: the mild steel materials in the tube of processing respectively or select two ends band connecting thread, the internal layer titanium materials in the tube and the outer titanium materials in the tube that match with size inside and outside mild steel materials in the tube, and the titanium tube head connecing with mild steel materials in the tube two ends screw thread, through intercepting blanking, at mild steel materials in the tube two ends, adopt thread connecting mode to coordinate two isometrical titanium tube heads, standby after polishing faying face; Then, successively internal layer titanium materials in the tube, mild steel materials in the tube and outer titanium materials in the tube are being set in together and are being combined into multiple tube blank from outside to inside, seal welding is on titanium tube head respectively at the two ends of internal layer titanium materials in the tube and outer titanium materials in the tube, and one of them leaves exhaust outlet;
2) cold rolling processing and forming: 1. above-mentioned multiple tube blank is carried out to the tempering processing that eliminates stress, 500 ℃ ~ 720 ℃ of temperature, are incubated 0.2 ~ 2 hour;
2. pipe carries out at duo mill that cold rolling to subtract wall compound, and section deformation amount 20% ~ 40%, cleans multiple tube surface lubrication oil;
3. at vacuum drying oven, heat-treat, 500 ℃ ~ 720 ℃ of temperature, are incubated 0.2 ~ 2 hour, carry out stress relieving by annealing, cool to room temperature with the furnace;
4. at duo mill or three-high mill, carry out cold rolling, reaming or tube reducing, passage section deformation rate 20% ~ 30%, produces multiple tube; Every time arranges vacuum annealing, cleans multiple tube surface lubrication oil before annealing, and 500 ℃ ~ 720 ℃ of annealing temperatures, are incubated 15 ~ 120 minutes.While being cooled to room temperature, carry out rolling next time;
5. on rounding machine, pass through full circle or tube reducing, to being rolled down to qualified size;
6. multiple tube is aligned at straightener, then after crop scale, is finished product.
The titanium pipe layer of metal composite pipe finished product of the present invention and the Thickness Ratio of low carbon steel pipe layer are 1 ~ 1.5:6 ~ 20, and length range is between 1 meter-10 meters.
The titanium materials in the tube of the selected use of the present invention comprise: pure titanium TA0, pure titanium TA1, pure titanium TA2; Described mild steel materials in the tube material is: Q235,16Mn, No. 20 steel, 20g boiler steel.
Structure of the present invention is at the surfaces externally and internally of low carbon steel pipe and low carbon steel pipe two ends coated titanium metal, wherein surfaces externally and internally adopts the compound sandwich layer structure that becomes of method of rolling, the mechanical fasteners connected mode that two ends adopt is combined with each other through rolling, entire body rolling is compound wherein airtight by low carbon steel pipe, becomes full clad metal composite pipe structure.
During multiple tube bearing load, steel pipe plays a major role, and multiple tube anti-corrosion function is mainly that titanium works.
Multiple tube can adopt welding manner to connect, and also can adopt screw threads for fastening to connect, and also can connect by welded flange.
The multiple tube scope of application: tubular heat exchanger, the liquid delivery tube of petrochemical industry, fine chemistry industry, pharmaceutical industry, oil exploitation industry oil well casing, oil pick-up tube.
Economic benefit: titanium steel titanium sandwich structure multiple tube can be used by instead of titanium metal pipe material, can significantly reduce costs.According to cost-efficiency analysis, can replace stainless steel pipe completely.Particularly, aspect the food and medicine quality safety of fine chemistry industry, pharmaceutical industry, the necessity that titanium steel multiple tube replaces stainless steel pipe is particularly outstanding.
In order to meet the different requirements of market to pipe performance, titanium steel titanium sandwich structure multiple tube product variety is different.Mainly be divided into the anticorrosion tubing of low pressure, the anticorrosion tubing of middle pressure and the several series of structural anticorrosion tubing.
The present invention is for reducing production application cost, adopt multiple tube cold rolling working system, the problems referred to above have fundamentally been solved, the corrosion resistance not only with titanium pipe, and there is the intensity of common steel tube, can either guarantee product structural behaviour, antiseptic property, increase the service life, save again a large amount of titaniums, significantly reduced production cost.
The advantage that the present invention has and positive technique effect are: adopt method of the present invention, overcome the unfavorable factor that titanium steel can not weld, be difficult to assembly, realized the structure of the completely coated steel pipe of titanium.The titanium tube head at two ends can connect with welding, and can be threaded, and has facilitated product use.Production scale and product specification are controlled, and basic unit, the coating thickness of multiple tube are unrestricted.Multiple tube adopts the completely coated form of titanium to keep titanium attribute, and basic unit's steel pipe guarantees product strength as structure division cheaply, and high-performance, low cost, as the substitute products of titanium pipe, have been filled up the blank of like product.
Accompanying drawing explanation
Fig. 1 is composite pipe blank layer structure schematic diagram of the present invention.
Main description of reference numerals: 1 is outer titanium pipe, and 2 is Q235 steel pipe, and 3 is internal layer titanium pipe, and 4 is titanium tube head.
Below in conjunction with accompanying drawing, by example, the present invention is described in further detail, but following example is only the present invention's example wherein, do not represent the right protection scope that the present invention limits, the scope of the present invention is as the criterion with claims.
The specific embodiment
embodiment 1
According to Fig. 1, elaborate full clad metal composite pipe blank structure of the present invention and production method.The production method of this full clad metal multiple tube comprises the following steps:
The processing of composite pipe blank structure: Q235 steel pipe 2 material of processing respectively or select two ends band connecting thread, outer titanium pipe 1 material of pure titanium TA0 and pure titanium TA0 internal layer titanium pipe 3 material that match with outside dimension in Q235 steel pipe material, and the pure titanium TA0 metal tube head 4 connecing with mild steel materials in the tube two ends screw thread, through intercepting blanking, at Q235 steel pipe material two ends, adopt thread connecting mode to coordinate two isometrical pure titanium TA0 metal tube heads, standby after polishing faying face; Then, manage 1 material and be set in together and be combined into multiple tube blank successively the pure titanium TA0 of internal layer being managed from outside to inside to 3 material, Q235 steel pipe material and outer pure titanium TA0, wherein the two ends of internal layer pure titanium TA0 materials in the tube and outer pure titanium TA0 materials in the tube respectively seal welding on pure titanium TA0 metal tube head;
Cold rolling processing and forming (adopting the processing of cold rolling production method):
Select pure titanium TA0 titanium pipe, Q235 steel pipe blanking (radial dimension: titanium pipe D88/d84--steel pipe D84/d64--titanium pipe D64/d60, length 1000)---at two titanium tube heads of Q235 steel pipe two ends employing thread connecting mode cooperation,---process faying face and guarantee the fresh cleaning of metal---assembly (multiple tube pipe radial dimension D88/d60, length 1000), ectonexine titanium pipe box is contained on steel pipe 2, two ends weld together with titanium tube head 4 respectively, at one end combination of inner and outside face stays steam vent rolls composite pipe blank at two rod milling trains---at 0.2 ~ 2 hour air cooling of resistance furnace heating multiple tube pipe (500 ℃ ~ 720 ℃) insulation---, radial dimension D82/d62(section deformation rate 30.51%)---clean surface lubricating oil---vacuum heat tempering eliminate stress (temperature 550 ~ 720 ℃ insulation 0.2 ~ 2 hour), be cooled to 200 ℃ of air coolings of coming out of the stove below---at two rods or the cold rolling multiple tube radial dimension of three-high mill D78/d64(tube reducing, section deformation rate 30.99%)---clean surface lubricating oil---vacuum annealing is (550 ℃ ~ 650 ℃, 1 ~ 1.5 hour, air cooling)---multiple tube full circle sizing D73/d63(or tube reducing)------scale crop---detects (water pressure test)---mark knowledge---packing to aligning, warehouse-in.
embodiment 2
The present invention is according to the needs of application, and wherein, titanium materials in the tube are selected: pure titanium TA0, pure titanium TA1, pure titanium TA2; Described mild steel materials in the tube material selection: Q235,16Mn, No. 20 steel, 20g boiler steel.
The full clad metal composite pipe blank structure of this embodiment is identical with embodiment 1; And the production method of the full clad metal multiple tube of the present invention is as follows:
First select pure titanium TA2 titanium pipe, the steel pipe blanking of 20g boiler steel (radial dimension: titanium pipe D84/d82--steel pipe D82/d72--titanium pipe D72/d70, length 1000)---at two titanium tube heads of this steel pipe two ends employing thread connecting mode cooperation,---process faying face and guarantee the fresh cleaning of metal---assembly (multiple tube pipe radial dimension D84/d70, length 1000), ectonexine titanium pipe box is contained on steel pipe, two ends weld together with titanium tube head respectively, at one end combination of inner and outside face stays steam vent rolls composite pipe blank at two rod milling trains---at 0.2 ~ 2 hour air cooling of resistance furnace heating multiple tube pipe (500 ℃ ~ 720 ℃) insulation---, radial dimension D78/d66(section deformation rate 19.85%)---clean surface lubricating oil---vacuum heat tempering eliminate stress (temperature 550 ~ 720 ℃ insulation 0.2 ~ 2 hour), be cooled to 200 ℃ of air coolings of coming out of the stove below---at two rods or the cold rolling multiple tube radial dimension of three-high mill D74/d64(tube reducing, section deformation rate 20.12%)---clean surface lubricating oil---vacuum annealing is (550 ℃ ~ 650 ℃, 1 ~ 1.5 hour, air cooling)---multiple tube full circle sizing D73/d63(or tube reducing)------scale crop---detects (water pressure test)---mark knowledge---packing to aligning, warehouse-in.
Claims (3)
1. a production method for full clad metal multiple tube, is characterized in that, comprises the following steps:
1) processing of composite pipe blank: the mild steel materials in the tube of processing respectively or select two ends band connecting thread, the internal layer titanium materials in the tube and the outer titanium materials in the tube that match with size inside and outside mild steel materials in the tube, and the titanium tube head connecing with mild steel materials in the tube two ends screw thread, through intercepting blanking, at mild steel materials in the tube two ends, adopt thread connecting mode to coordinate two isometrical titanium tube heads, standby after polishing faying face; Then, successively internal layer titanium materials in the tube, mild steel materials in the tube and outer titanium materials in the tube are being set in together and are being combined into multiple tube blank from outside to inside, seal welding is on titanium tube head respectively at the two ends of internal layer titanium materials in the tube and outer titanium materials in the tube, and one of them leaves exhaust outlet;
2) cold rolling processing and forming: 1. above-mentioned multiple tube blank is carried out to the tempering processing that eliminates stress, 500 ℃ ~ 720 ℃ of temperature, are incubated 0.2 ~ 2 hour;
2. pipe carries out at duo mill that cold rolling to subtract wall compound, and section deformation amount 20% ~ 40%, cleans multiple tube surface lubrication oil;
3. at vacuum drying oven, heat-treat, 500 ℃ ~ 720 ℃ of temperature, are incubated 0.2 ~ 2 hour, carry out stress relieving by annealing, cool to room temperature with the furnace;
4. at duo mill or three-high mill, carry out cold rolling, reaming or tube reducing, passage section deformation rate 20% ~ 30%, produces multiple tube; Every time arranges vacuum annealing, cleans multiple tube surface lubrication oil before annealing, and 500 ℃ ~ 720 ℃ of annealing temperatures, are incubated 15 ~ 120 minutes;
While being cooled to room temperature, carry out rolling next time;
5. on rounding machine, pass through full circle or tube reducing, to being rolled down to qualified size;
6. multiple tube is aligned at straightener, then after crop scale, is metal composite pipe finished product.
2. the production method of full clad metal multiple tube according to claim 1, is characterized in that: the titanium pipe layer of described metal composite pipe finished product and the Thickness Ratio of low carbon steel pipe layer are 1 ~ 1.5:6 ~ 20, and length range is between 1 meter-10 meters.
3. the production method of full clad metal multiple tube according to claim 1, is characterized in that: titanium materials in the tube comprise: pure titanium TA0, pure titanium TA1, pure titanium TA2; Described mild steel materials in the tube material is: Q235,16Mn, No. 20 steel, 20g boiler steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410485316.4A CN104191182A (en) | 2014-09-22 | 2014-09-22 | Production method of totally-coated metal composite pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410485316.4A CN104191182A (en) | 2014-09-22 | 2014-09-22 | Production method of totally-coated metal composite pipe |
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| CN104191182A true CN104191182A (en) | 2014-12-10 |
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| CN201410485316.4A Pending CN104191182A (en) | 2014-09-22 | 2014-09-22 | Production method of totally-coated metal composite pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801931A (en) * | 2015-04-11 | 2015-07-29 | 西北有色金属研究院 | Preparation method of copper-coated stainless steel metal composite rod with low leakage rate |
| CN104930300A (en) * | 2015-06-08 | 2015-09-23 | 江苏常宝钢管股份有限公司 | Pipe end anti-corrosive sealing structure of anti-corrosive oil pipe |
| CN111604646A (en) * | 2020-05-26 | 2020-09-01 | 上海奉贤钢管厂有限公司 | Machining process of multi-element composite steel pipe |
| CN113477712A (en) * | 2021-07-30 | 2021-10-08 | 安徽工业大学 | Preparation process of multilayer metal composite belt |
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| CN1210044A (en) * | 1998-08-14 | 1999-03-10 | 侯贤忠 | Carbon steel pipe with inner and outer corrosionproof stainless steel coatings and production thereof |
| CN1330988A (en) * | 2000-06-23 | 2002-01-16 | 西南新日钢制品有限公司 | Technology for making composite metal pipe |
| CN2648225Y (en) * | 2003-07-02 | 2004-10-13 | 赵惠敏 | Thin layer stainless steel composite steel pipe |
| US20050005983A1 (en) * | 2003-07-09 | 2005-01-13 | Lewis John K. | Weldable conduit and method |
| CN102537531A (en) * | 2011-12-06 | 2012-07-04 | 南京宝泰特种材料股份有限公司 | Titanium/steel composite pipeline and preparation method thereof |
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2014
- 2014-09-22 CN CN201410485316.4A patent/CN104191182A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1210044A (en) * | 1998-08-14 | 1999-03-10 | 侯贤忠 | Carbon steel pipe with inner and outer corrosionproof stainless steel coatings and production thereof |
| CN1330988A (en) * | 2000-06-23 | 2002-01-16 | 西南新日钢制品有限公司 | Technology for making composite metal pipe |
| CN2648225Y (en) * | 2003-07-02 | 2004-10-13 | 赵惠敏 | Thin layer stainless steel composite steel pipe |
| US20050005983A1 (en) * | 2003-07-09 | 2005-01-13 | Lewis John K. | Weldable conduit and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801931A (en) * | 2015-04-11 | 2015-07-29 | 西北有色金属研究院 | Preparation method of copper-coated stainless steel metal composite rod with low leakage rate |
| CN104801931B (en) * | 2015-04-11 | 2017-01-11 | 西北有色金属研究院 | Preparation method of copper-coated stainless steel metal composite rod with low leakage rate |
| CN104930300A (en) * | 2015-06-08 | 2015-09-23 | 江苏常宝钢管股份有限公司 | Pipe end anti-corrosive sealing structure of anti-corrosive oil pipe |
| CN111604646A (en) * | 2020-05-26 | 2020-09-01 | 上海奉贤钢管厂有限公司 | Machining process of multi-element composite steel pipe |
| CN113477712A (en) * | 2021-07-30 | 2021-10-08 | 安徽工业大学 | Preparation process of multilayer metal composite belt |
| CN113477712B (en) * | 2021-07-30 | 2023-12-05 | 安徽工业大学 | Preparation process of multilayer metal composite belt |
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