CN104874761A - Metallurgy composite production method of oil-gas field pipeline steel pipe - Google Patents
Metallurgy composite production method of oil-gas field pipeline steel pipe Download PDFInfo
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Abstract
The invention discloses a metallurgy composite production method of an oil-gas field pipeline steel pipe. The method includes: selecting X52, X56, X60 and X65 steel-grade materials to serve as the outer layer casting materials of the pipeline steel pipe, and selecting 304 and 316L steel materials as the inner layer casting materials of the pipeline steel pipe; using a centrifugal casting method to cast the outer layer first and cast the inner layer, and strictly controlling the components of the inner layer and the outer layer during casting; performing thermal extrusion and cold rolling on the cast pipeline steel pipe; performing thermal processing on the pipeline steel pipe, wherein the thermal processing process mainly comprises normalizing and tempering; inspecting the pipeline steep pipe after the thermal processing, and storing qualified products. The method has the advantages that the pipeline steel pipe produced by the method is high in quality, the inner layer and the outer layer of the pipeline steel pipe are composited in a metallurgy manner, the combining force of the inner layer and the outer layer is greatly improved as compared with that of the inner layer and the outer layer, combined in a mechanical manner, of a pipeline steel pipe, subsequent deformation with large deformation amount can be performed, the inner-layer metal is high in corrosion resistance, and manufacturing of corresponding seamless steel pipes is facilitated.
Description
Technical field
The present invention relates to metallurgical technology field, particularly relate to a kind of metallurgical composite preparation process of oil gas field pipeline steel tube.
Background technology
China is a lot of containing the oil gas field of sour gas, as Tarim, Xinjiang, Sichuan and Central Plains have many oil gas fields to be in deep-well, high temperature, high pressure and high adverse circumstances of corroding.Along with increasing of impurities in the increasing of China's oil well depth, oil gas, the demand for the erosion-resisting oil well pipe of HTHP will present fulminant growth.Therefore, the HTHP corrosion resistance for oil well pipe, pipeline steel pipe requires can be more and more higher, but the whole dependence on import of the composite bimetal pipe meeting this characteristic at present.Only have about 1/3 in these high corrosion-resistant nickel-base alloy seamless steel pipe materials for solving the corrosion-resistant problem of internal layer, all the other 2/3 as just structural support material use, cause the significant wastage of resource.If this 2/3 part carbon steel material is preferably substituted, the use waste of abros material can be solved first, second can choose the better structural material of performance, improve the use safety sex chromosome mosaicism of seamless steel pipe.
At present, domestic composite bimetal pipe moulding process on the market, still rest in mechanical compound (spinning, drawing, bulging, roll) level, but there is following shortcoming in mechanical composite steel tube: 1, not, it can not carry out the deformation after unloading of aximal deformation value for internal layer and outer bond strength; 2, due to the capacity of equipment reason for the manufacture of this composite steel tube, thicker multiple tube is required not solve to coating two-layer in conjunction with problem; 3, require for coating metal the pipe possessing the material of highly corrosion resistant, the resistant material of its coating is difficult to be made into corresponding seamless steel pipe.
Summary of the invention
Object of the present invention is just the metallurgical composite preparation process providing a kind of oil gas field pipeline steel tube in order to solve the problem.
In order to achieve the above object, present invention employs following technical scheme:
A metallurgical composite preparation process for oil gas field pipeline steel tube, described pipeline steel tube comprises internal layer and skin, comprises the following steps:
1) get out cast material, select X52, X56, X60 and X65 grade of steel material as the outer cast material of described pipeline steel tube, select 304 and the Steel material of 316L as the internal layer cast material of described pipeline steel tube;
2) adopt centrifugally cast method to cast, first carry out outer field casting, internal layer of casting again after skin has been cast, in the process of casting, need composition two-layer inside and outside strict control;
3) hot extrusion and cold rolling is carried out to the pipeline steel tube of having cast;
4) heat-treat pipeline steel tube, Technology for Heating Processing mainly comprises normalizing and tempering two processes;
5) pipeline steel tube after heat treatment is tested, and certified products are put in storage.
Further, when heat-treating pipeline steel tube, normalizing temperature should be 900 DEG C ± 20 DEG C, and be incubated 1 ~ 2 hour, cooling means selects air cooling or air-cooled.
Further, when heat-treating pipeline steel tube, temperature should be 600 DEG C ± 20 DEG C, and be incubated 2 ~ 4 hours, cooling means is air cooling.
Particularly, the pipeline steel tube obtained after heat treatment is metallurgical binding bimetal composite seamless steel pipe.
Beneficial effect of the present invention is:
The present invention adopts centrifugal pipe to add extruding and cold rolling explained hereafter pipeline steel tube, the unique distinction of pipeline steel tube newly developed is, it combines the Metallurgical processing process of primary industry material and high-tech, adopt the extruding of spun casting pipe, again through cold rolling (or cold-drawn) mode of production, thus obtain the joint product of high-quality, inside and outside two-layerly belong to metallurgical compound, the more mechanical compound of adhesion has greatly improved, the deformation after unloading of aximal deformation value can be carried out, inner layer metal possesses high-corrosion resistance, and is convenient to be made into corresponding seamless steel pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described in detail:
Pipeline steel tube in the present invention comprises internal layer and skin, the present invention includes following steps:
1) get out cast material, select X52, X56, X60 and X65 grade of steel material as the outer cast material of pipeline steel tube, select 304 and the Steel material of 316L as the internal layer cast material of pipeline steel tube;
2) adopt centrifugally cast method to cast, first carry out outer field casting, internal layer of casting again after skin has been cast, in the process of casting, need composition two-layer inside and outside strict control;
3) hot extrusion and cold rolling is carried out to the pipeline steel tube of having cast;
4) heat-treat pipeline steel tube, Technology for Heating Processing mainly comprises normalizing and tempering two processes;
5) pipeline steel tube after heat treatment is tested, and certified products are put in storage.
The metallurgical composite preparation process of oil gas field pipeline steel tube of the present invention, when heat-treating pipeline steel tube, normalizing temperature should be 900 DEG C ± 20 DEG C, and be incubated 1 ~ 2 hour, cooling means selects air cooling or air-cooled.When heat-treating pipeline steel tube, temperature should be 600 DEG C ± 20 DEG C, and be incubated 2 ~ 4 hours, cooling means is air cooling.The pipeline steel tube obtained after heat treatment is metallurgical binding bimetal composite seamless steel pipe, cost-saving basis meets and is on active service in the performance of oil gas field corrosive environment.
The metallurgical composite preparation process of oil gas field pipeline steel tube of the present invention, in the process of casting, inside and outside two-layer composition by weight percent is as follows:
Table 1 inside and outside layer of chemical analysis
The metallurgical composite preparation process of oil gas field pipeline steel tube of the present invention, pipeline steel tube is made with centrifugally cast production method, owing to achieving the metallurgical binding between ectonexine, forming very large ectonexine adhesion, can not there is layering or cracking phenomena because ectonexine metal bears larger shearing force in process in prepared pipeline steel tube under arms.The performance requirement of inside and outside double layer of metal material will be considered when heat treatment, the present invention uses brand-new heat treating regime to heat-treat in conjunction with composite seamless steel pipe oil gas field bimetal metallurgy, the performance requirement of outer layer metal intensity can be met, also can ensure the corrosion resistant requirement of inner layer metal.
Advantage of the present invention is mainly manifested in: the dual-metal clad steel pipe that traditional handicraft is produced is all the method adopting mechanical bond, and centrifugal casting technique makes double layer material fusion shaping in the liquid state, so accomplished the object of real metallurgical binding; Centrifugal casting technique makes molten steel coagulation forming under the gravity condition of tens times of casting far above routine, and solve the problem of as cast condition pipe internal defect very well, metal compaction degree is high; Its deslagging, good exhaust effect, gas and inclusion content level are much better than (under identical smelting condition) traditional handicraft level; The dimensional accuracy of centrifugal strand is high, uniform wall thickness, for the dimensional accuracy of following process product provides strong guarantee; Centrifugal casting technique, for the steel pipe's production of small lot, the many specifications of multi items, high-quality, high added value steel, has higher flexibility; Material and the thickness of basic unit and cladding can be changed for dual-metal clad steel pipe neatly, meet purposes and the needs of different industries.
The product specification that our company utilizes this technique to produce and tolerance as follows:
Table 2
Hot extrusion technique is a kind of pressure processing method in ferrous metal, and it is compared with rolling equal pressure processing method with forging, and superiority is as follows: can produce and forge and all unmanageable inductile high-alloy steel of rolling and alloy, and refractory material; Production rolling can not obtain or be difficult to the solid or hollow shaped material of the complicated shape obtained; Composite can be produced; Organization of production is flexible, and conversion specification is convenient; Extruded product all directions mechanical performance is very consistent.
Claims (4)
1. a metallurgical composite preparation process for oil gas field pipeline steel tube, described pipeline steel tube comprises internal layer and skin, it is characterized in that, comprises the following steps:
1) get out cast material, select X52, X56, X60 and X65 grade of steel material as the outer cast material of described pipeline steel tube, select 304 and the Steel material of 316L as the internal layer cast material of described pipeline steel tube;
2) adopt centrifugally cast method to cast, first carry out outer field casting, internal layer of casting again after skin has been cast, in the process of casting, need composition two-layer inside and outside strict control;
3) hot extrusion and cold rolling is carried out to the pipeline steel tube of having cast;
4) heat-treat pipeline steel tube, Technology for Heating Processing mainly comprises normalizing and tempering two processes;
5) pipeline steel tube after heat treatment is tested, and certified products are put in storage.
2. the metallurgical composite preparation process of oil gas field pipeline steel tube according to claim 1, is characterized in that: when heat-treating pipeline steel tube, and normalizing temperature should be 900 DEG C ± 20 DEG C, and be incubated 1 ~ 2 hour, cooling means selects air cooling or air-cooled.
3. the metallurgical composite preparation process of oil gas field pipeline steel tube according to claim 1, is characterized in that: when heat-treating pipeline steel tube, and temperature should be 600 DEG C ± 20 DEG C, and be incubated 2 ~ 4 hours, cooling means is air cooling.
4. the metallurgical composite preparation process of oil gas field pipeline steel tube according to claim 1, is characterized in that: the pipeline steel tube obtained after heat treatment is metallurgical binding bimetal composite seamless steel pipe.
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| CN201510058276.XA CN104874761A (en) | 2015-02-04 | 2015-02-04 | Metallurgy composite production method of oil-gas field pipeline steel pipe |
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| CN201510058276.XA CN104874761A (en) | 2015-02-04 | 2015-02-04 | Metallurgy composite production method of oil-gas field pipeline steel pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798269A (en) * | 2016-04-06 | 2016-07-27 | 四川鑫鼎新材料有限公司 | Preparation method of nickel-based duplex metal composite used for fluorine chemical production equipment |
| CN109825772A (en) * | 2019-04-08 | 2019-05-31 | 四川鑫鼎新材料有限公司 | A kind of nuclear screening composite ingot and preparation method thereof |
| CN110039031A (en) * | 2019-04-11 | 2019-07-23 | 中国石油天然气集团有限公司 | A kind of device and its pouring procedure being poured bimetallic pipe billet |
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| CN85102836A (en) * | 1985-04-01 | 1987-03-11 | 大连工学院 | The method of centrifugal casting bi-metal double-pipe |
| JPH0263668A (en) * | 1988-08-30 | 1990-03-02 | Nippon Steel Corp | Manufacture of seamless pipe |
| WO2004014584A1 (en) * | 2002-08-06 | 2004-02-19 | Peak Werkstoff Gmbh | Cast combination of hollow profiles consisting of a light-metal alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105798269A (en) * | 2016-04-06 | 2016-07-27 | 四川鑫鼎新材料有限公司 | Preparation method of nickel-based duplex metal composite used for fluorine chemical production equipment |
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| CN109825772A (en) * | 2019-04-08 | 2019-05-31 | 四川鑫鼎新材料有限公司 | A kind of nuclear screening composite ingot and preparation method thereof |
| CN110039031A (en) * | 2019-04-11 | 2019-07-23 | 中国石油天然气集团有限公司 | A kind of device and its pouring procedure being poured bimetallic pipe billet |
| CN110039031B (en) * | 2019-04-11 | 2021-03-30 | 中国石油天然气集团有限公司 | Device and method for pouring bimetallic tube blank |
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Application publication date: 20150902 |
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