CN107829040A - High intensity salt resistance alkali metal tubing and preparation method thereof - Google Patents
High intensity salt resistance alkali metal tubing and preparation method thereof Download PDFInfo
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- CN107829040A CN107829040A CN201710997839.0A CN201710997839A CN107829040A CN 107829040 A CN107829040 A CN 107829040A CN 201710997839 A CN201710997839 A CN 201710997839A CN 107829040 A CN107829040 A CN 107829040A
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- Prior art keywords
- pipe
- alkali metal
- high intensity
- metal tubing
- salt resistance
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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- Chemical & Material Sciences (AREA)
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses a kind of high intensity salt resistance alkali metal tubing and preparation method thereof, composition is calculated as with weight %：Mo1.5~2%, Cr1.5~2.30%, C0.4~0.5%, Cu≤0.6%, Ni≤0.6%, Si≤0.2%, Mn0.5~0.7%, P≤0.01%, S≤0.01%, N≤0.01%, Al≤0.03%, Mg≤0.03%, Ca≤0.03%, B0.01~0.02%, Nb 0.01~0.06%, As≤0.01%, Sn≤0.01%, surplus are iron.By raw material iron through smelt, refine and vacuum outgas, continuous casting rounding pipe, tube rolling light pipe, light pipe Tempering and Quenching after pipe is made.Pipe made of the present invention can adapt to use under saline-alkali environment, and corrosion resistance is strong, not perishable impaired, ensure that normal transformation and the plant development in salt-soda soil, avoids waste.
Description
Technical field
The present invention relates to one kind to belong to anticorrosive metal pipe and its manufacture method, more particularly to a kind of high intensity salt resistance alkali metal
Tubing and preparation method thereof.
Background technology
In the transformation and plant development in salt-soda soil, metallic conduit can be inevitably used.In use because of these gold
Metal conduit can be entered in body by the corrosion of various alkali and salt ion, and burn into cracking can occur under stress, cause
Metallic conduit is damaged, and influenceing the anticorrosive factor of pipe mainly has：Hardness, tissue and the pipe chemical composition of pipe.Salt-soda soil changes at present
Make and do not adapt to make under saline-alkali environment mostly with hardness, tissue and the pipe chemical composition of metal tube used in plant development
With causing a large amount of corrosion of metal tube impaired and damage, not only have impact on transformation and the plant development in salt-soda soil, also result in greatly
The waste of amount.
The content of the invention
The technical problems to be solved by the invention are：One kind is provided to can adapt to use under saline-alkali environment, it is anticorrosive
Property it is strong, it is not perishable impaired, ensure that normal transformation and the plant development in salt-soda soil, avoid the high intensity salt resistance alkali gold of waste
Belong to tubing.Present invention also offers a kind of preparation method of high intensity salt resistance alkali metal tubing.
In order to solve the above technical problems, the technical scheme is that：High intensity salt resistance alkali metal tubing, it is characterised in that
Pipe composition is calculated as with weight %：Mo1.5~2%, Cr1.5~2.30%, C0.4~0.5%, Cu≤0.6%, Ni≤0.6%,
Si≤0.2%, Mn0.5~0.7%, P≤0.01%, S≤0.01%, N≤0.01%, Al≤0.03%, Mg≤0.03%, Ca
≤ 0.03%, B0.01~0.02%, Nb 0.01~0.06%, As≤0.01%, Sn≤0.01%, surplus are iron.
As preferable technical scheme, yield strength >=880Mpa of pipe.
The preparation method of high intensity salt resistance alkali metal tubing, including step：
1), raw material iron is smelted using oxygen coverter, using being made after external refining and vacuum outgas, arc continuous casting
Circular pipe blank；
2), circular pipe blank is heated using rotary heating furnace, then using the perforation of two roller tapered rollers, pipe mill rolling and sizing
Machine tube reducing, and by aligning and sawing finishing procedure, light pipe most is made through nondestructive inspection afterwards；
3), by pipe end thread, box cupling twist-on and the homogeneous tube water pressure test, finished product will be eventually fabricated after light pipe Tempering and Quenching
Pipe.
The quenching-and-tempering process：Using quenching add-back ignition technique, wherein 1000~1050 DEG C of quenching, soaking time 20
~30 minutes, 700~730 DEG C are tempered, soaking time is not less than 100 minutes.
Tube section obtains more than 98.2% martensitic structure after quenching；Martensitic structure grain size is less than 8 grades after tempering.
High intensity salt resistance alkali metal tubing with the above mentioned technical proposal, pipe composition are calculated as with weight %：Mo1.5
~2%, Cr1.5~2.30%, C0.4~0.5%, Cu≤0.6%, Ni≤0.6%, Si≤0.2%, Mn0.5~0.7%, P
≤ 0.01%, S≤0.01%, N≤0.01%, Al≤0.03%, Mg≤0.03%, Ca≤0.03%, B0.01~0.02%,
Nb 0.01~0.06%, As≤0.01%, Sn≤0.01%, surplus are iron.The wherein composition such as C, S, Cr is greatly improved pipe
The compositions such as decay resistance, Si, Mn, which are greatly improved the compositions such as the intensity of pipe, Nb, P, Mo, can substantially improve the tissue of pipe so that
This high intensity salt resistance alkali metal tubing has good physicochemical property, performance, corrosion resistance, can adapt in saline and alkaline ring
Used under border, corrosion resistance is strong, not perishable impaired, ensure that normal transformation and the plant development in salt-soda soil, avoids waste.
Embodiment
Embodiment one
High intensity salt resistance alkali metal tubing, pipe composition are calculated as by following weight %：Mo1.5%, Cr1.5%, C0.4%,
Cu0.3%, Ni0.3%, Si0.1%, Mn0.5%, P0.005%, S0.005%, N0.005%, Al0.015%,
Mg0.015%, Ca0.015%, B0.01%, Nb0.01%, As0.005%, Sn0.005%, surplus are iron；
High intensity salt resistance alkali metal tubing, including step are manufactured by above-mentioned raw materials：
1), raw material iron is smelted using oxygen coverter, using being made after external refining and vacuum outgas, arc continuous casting
Circular pipe blank；
2), circular pipe blank is heated using rotary heating furnace, then using the perforation of two roller tapered rollers, pipe mill rolling and sizing
Machine tube reducing, and by aligning and sawing finishing procedure, light pipe most is made through nondestructive inspection afterwards；
3), by pipe end thread, box cupling twist-on and the homogeneous tube water pressure test, finished product will be eventually fabricated after light pipe Tempering and Quenching
Pipe, quenching-and-tempering process：Using quenching add-back ignition technique, wherein 1000 DEG C of quenching, soaking time 30 minutes, is tempered 700 DEG C,
Soaking time 120 minutes.
The tube section of pipe obtains 98.2% martensitic structure after being made；Martensitic structure grain size is less than 8 grades after tempering；Pipe
Yield strength >=880Mpa.
Embodiment two
High intensity salt resistance alkali metal tubing, pipe composition are calculated as by following weight %：Mo2%, Cr2.30%, C0.5%,
Cu0.6%, Ni0.6%, Si0.2%, Mn0.7%, P0.01%, S0.01%, N0.01%, Al0.03%, Mg0.03%,
Ca0.03%, B0.02%, Nb 0.06%, As0.01%, Sn0.01%, surplus are iron.
High intensity salt resistance alkali metal tubing, including step are manufactured by above-mentioned raw materials：
1), raw material iron is smelted using oxygen coverter, using being made after external refining and vacuum outgas, arc continuous casting
Circular pipe blank；
2), circular pipe blank is heated using rotary heating furnace, then using the perforation of two roller tapered rollers, pipe mill rolling and sizing
Machine tube reducing, and by aligning and sawing finishing procedure, light pipe most is made through nondestructive inspection afterwards；
3), by pipe end thread, box cupling twist-on and the homogeneous tube water pressure test, finished product will be eventually fabricated after light pipe Tempering and Quenching
Pipe, quenching-and-tempering process：Using quenching add-back ignition technique, wherein 1050 DEG C of quenching, soaking time 20 minutes, is tempered 730 DEG C,
Soaking time 100 minutes.
The tube section of pipe obtains 98.5% martensitic structure after being made；Martensitic structure grain size is less than 8 grades after tempering；Pipe
Yield strength 880Mpa.
Embodiment three
High intensity salt resistance alkali metal tubing, pipe composition are calculated as by following weight %：Mo1.5~2%, Cr1.5~2.30%,
C0.4~0.5%, Cu≤0.6%, Ni≤0.6%, Si≤0.2%, Mn0.5~0.7%, P≤0.01%, S≤0.01%, N
≤ 0.01%, Al≤0.03%, Mg≤0.03%, Ca≤0.03%, B0.01~0.02%, Nb 0.01~0.06%, As≤
0.01%, Sn≤0.01%, surplus are iron.
High intensity salt resistance alkali metal tubing, including step are manufactured by above-mentioned raw materials：
1), raw material iron is smelted using oxygen coverter, using being made after external refining and vacuum outgas, arc continuous casting
Circular pipe blank；
2), circular pipe blank is heated using rotary heating furnace, then using the perforation of two roller tapered rollers, pipe mill rolling and sizing
Machine tube reducing, and by aligning and sawing finishing procedure, light pipe most is made through nondestructive inspection afterwards；
3), by pipe end thread, box cupling twist-on and the homogeneous tube water pressure test, finished product will be eventually fabricated after light pipe Tempering and Quenching
Pipe；Using quenching add-back ignition technique, wherein 1000~1050 DEG C of quenching, soaking time 20~30 minutes, is tempered 700~730 DEG C,
Soaking time is not less than 100 minutes.
The section of pipe obtains more than 98.2% martensitic structure after being made；Martensitic structure grain size is less than 8 after tempering
Level, yield strength >=880Mpa of pipe.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (5)
1. high intensity salt resistance alkali metal tubing, it is characterised in that pipe composition is calculated as with weight %：Mo1.5~2%, Cr1.5~
2.30%, C0.4~0.5%, Cu≤0.6%, Ni≤0.6%, Si≤0.2%, Mn0.5~0.7%, P≤0.01%, S≤
0.01%, N≤0.01%, Al≤0.03%, Mg≤0.03%, Ca≤0.03%, B0.01~0.02%, Nb 0.01~
0.06%, As≤0.01%, Sn≤0.01%, surplus are iron.
2. high intensity salt resistance alkali metal tubing as claimed in claim 1, it is characterised in that：Yield strength >=880Mpa of pipe.
3. the preparation method of high intensity salt resistance alkali metal tubing as claimed in claim 1, it is characterised in that including step：
1), raw material iron is smelted using oxygen coverter, using pipe is made after external refining and vacuum outgas, arc continuous casting
Base；
2), circular pipe blank is heated using rotary heating furnace, then subtracted using the perforation of two roller tapered rollers, pipe mill rolling and sizing mill
Footpath, and by aligning and sawing finishing procedure, light pipe most is made through nondestructive inspection afterwards；
3), by pipe end thread, box cupling twist-on and the homogeneous tube water pressure test, production tube will be eventually fabricated after light pipe Tempering and Quenching.
4. the preparation method of high intensity salt resistance alkali metal tubing as claimed in claim 3, it is characterised in that at the quenched heat
Science and engineering skill：Using quenching add-back ignition technique, wherein 1000~1050 DEG C are quenched, soaking time 20~30 minutes, tempering 700~
730 DEG C, soaking time is not less than 100 minutes.
5. the preparation method of the high intensity salt resistance alkali metal tubing as described in claim 3 or 4, it is characterised in that pipe is cut after quenching
Face obtains more than 98.2% martensitic structure；Martensitic structure grain size is less than 8 grades after tempering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710997839.0A CN107829040A (en) | 2017-10-24 | 2017-10-24 | High intensity salt resistance alkali metal tubing and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710997839.0A CN107829040A (en) | 2017-10-24 | 2017-10-24 | High intensity salt resistance alkali metal tubing and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107829040A true CN107829040A (en) | 2018-03-23 |
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ID=61648904
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710997839.0A Pending CN107829040A (en) | 2017-10-24 | 2017-10-24 | High intensity salt resistance alkali metal tubing and preparation method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418419A (en) * | 2008-12-09 | 2009-04-29 | 山东墨龙石油机械股份有限公司 | Middle and low intensity oil casing tube for resisting sulfurated hydrogen corrosion and method for producing the same |
| CN101418421A (en) * | 2008-12-09 | 2009-04-29 | 山东墨龙石油机械股份有限公司 | High intensity oil casing tube for resisting sulfurated hydrogen corrosion and method for producing the same |
| CN101440460A (en) * | 2008-12-10 | 2009-05-27 | 山东墨龙石油机械股份有限公司 | Medium and high strength oil casing for resisting sulfurated hydrogen corrosion and manufacturing method thereof |
| CN102459677A (en) * | 2009-06-24 | 2012-05-16 | 杰富意钢铁株式会社 | High-strength seamless steel tube for use in oil wells, which has excellent resistance to sulfide stress cracking and production method for same |
| CN103789685A (en) * | 2014-02-17 | 2014-05-14 | 上海海隆石油管材研究所 | High-strength high-toughness petroleum drill pipe and production method thereof |
| CN105492642A (en) * | 2013-07-26 | 2016-04-13 | 新日铁住金株式会社 | Low-alloy steel pipe for oil well and production method therefor |
| CN105925883A (en) * | 2016-05-27 | 2016-09-07 | 宝鸡石油钢管有限责任公司 | High-strength and high-toughness N80Q petroleum casing pipe and manufacturing method thereof |
| CN107002201A (en) * | 2014-12-12 | 2017-08-01 | 新日铁住金株式会社 | The manufacture method of pipe for oil well use low-alloy steel and low-alloy steel oil well pipe |
-
2017
- 2017-10-24 CN CN201710997839.0A patent/CN107829040A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418419A (en) * | 2008-12-09 | 2009-04-29 | 山东墨龙石油机械股份有限公司 | Middle and low intensity oil casing tube for resisting sulfurated hydrogen corrosion and method for producing the same |
| CN101418421A (en) * | 2008-12-09 | 2009-04-29 | 山东墨龙石油机械股份有限公司 | High intensity oil casing tube for resisting sulfurated hydrogen corrosion and method for producing the same |
| CN101440460A (en) * | 2008-12-10 | 2009-05-27 | 山东墨龙石油机械股份有限公司 | Medium and high strength oil casing for resisting sulfurated hydrogen corrosion and manufacturing method thereof |
| CN102459677A (en) * | 2009-06-24 | 2012-05-16 | 杰富意钢铁株式会社 | High-strength seamless steel tube for use in oil wells, which has excellent resistance to sulfide stress cracking and production method for same |
| CN105492642A (en) * | 2013-07-26 | 2016-04-13 | 新日铁住金株式会社 | Low-alloy steel pipe for oil well and production method therefor |
| CN103789685A (en) * | 2014-02-17 | 2014-05-14 | 上海海隆石油管材研究所 | High-strength high-toughness petroleum drill pipe and production method thereof |
| CN107002201A (en) * | 2014-12-12 | 2017-08-01 | 新日铁住金株式会社 | The manufacture method of pipe for oil well use low-alloy steel and low-alloy steel oil well pipe |
| CN105925883A (en) * | 2016-05-27 | 2016-09-07 | 宝鸡石油钢管有限责任公司 | High-strength and high-toughness N80Q petroleum casing pipe and manufacturing method thereof |
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Application publication date: 20180323 |