CN1398998A - Low-temperature seam-less carbon steel pipe - Google Patents
Low-temperature seam-less carbon steel pipe Download PDFInfo
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- CN1398998A CN1398998A CN 02109639 CN02109639A CN1398998A CN 1398998 A CN1398998 A CN 1398998A CN 02109639 CN02109639 CN 02109639 CN 02109639 A CN02109639 A CN 02109639A CN 1398998 A CN1398998 A CN 1398998A
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- steel pipe
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Abstract
A seam-less carbon steel pipe for low temp. is made of alloy comprising C less than or equal to 0.13 wt%, Si less than or equal to 0.30 wt%, Mn 0.40-0.12 wt%, P less than or equal to 0.02 wt%, S less than or equal to 0.02 wt%, Cr less than or equal to 0.20 wt%, Mo less than or equal to 0.10 wt%, V less than or equal to 0.10 wt%, Ni less than or equal to 0.20 wt%, Cu less than or equal to 0.20 wt% and Al 0.01-0.08 wt% Fe the rest. The seam-less carbon steel pipe is made with the raw materials of the above-mentioned components and through making pipe blank, heat processing, cold processing and post-treatment. The steel pipe of the present invention can operate normally at low temperature of minus 60 deg.C, and the Charpy test absorbed energy is higher than 10 J at the said temperature. The product of the present invention has low cost and is especially suitable for used in fishing ship for fishing tunny.
Description
Technical field the present invention relates to a kind of steel alloy, particularly the seam-less carbon steel pipe that uses under cold condition.
Background technology low temperature is classified by the Chemical Composition of steel with weldless steel tube two big classes, and a class is an alloy seamless steel pipe, and it can use under the temperature condition more than-197 ℃ according to the data record; Another kind of is seam-less carbon steel pipe, and it can use under the temperature condition more than-45 ℃.The present weldless steel tube that uses on China's long range fishing tuna clipper, requirement must satisfy and using under the temperature condition more than-60 ℃, and all do not have these technical qualification in the domestic and international technical specifications of existing seam-less carbon steel pipe.Though alloy seamless steel pipe can satisfy these technical qualification, its cost cost height costs an arm and a leg.
Chemical ingredients and the content of having stipulated the carbon steel steel pipe in the NKK standard are as follows:
| ????C | ????Si | ????Mn | ????P | ????S | |
| ?STPL39 | ??≤0.25 | ??≤0.35 | ??≤1.35 | ??≤0.035 | ??≤0.035 |
Chemical ingredients and the content of having stipulated the carbon steel steel pipe in U.S.'s steel pipe standard are as follows:
| ????C | ????Si | ????Mn | ????P | ????S | |
| ?ASTMA | ??≤0.3 | ??≤0.1 | ?0.29-1.06 | ?≤0.025 | ?≤0.025 |
The seam-less carbon steel pipe of the U.S. was defined as 〉=5J than notched specimen in tough (the absorbing energy) summer to 2.5 * 10 * 55mm in the ASTMA334/A334M-91 technological standard of the low-temperature impact under-46 ℃, though Japan JIS has the technical requirements of large dimension specimen under right-45 ℃ of temperature, this small-sized notch test is not stipulated.Summary of the invention the object of the present invention is to provide a kind of can be under the temperature condition more than-60 ℃ normally the use, and processing performance is good, have that high low-temperature impact is tough, good mechanical property, low-temperature seam-less carbon steel pipe that cost is low.
Technical solution of the present invention is, a kind of low-temperature seam-less carbon steel pipe, its special character is that the alloying constituent of steel pipe and content (weight percent) are: C≤0.13, Si≤0.30, Mn0.40-1.20, P≤0.02, S≤0.02, Cr≤0.20, Mo≤0.10, V≤0.10, Ni≤0.20, Cu≤0.20, Als≤0.12, surplus is iron Fe, with the mentioned component is that raw material is through the tubulation base, hot-work, cold working and finished product obtain seam-less carbon steel pipe after handling, wherein: in the cold working operation, 1, the temperature that double fished pipe heat-treated is 680-720 ℃, the treatment time is 〉=and t (wall thickness) * 4 minute/millimeter, 2, normalizing temperature before the finished product is 900-930 ℃, treatment time is 〉=t (wall thickness) * 3 minute/millimeter, and 3, the treatment temp of finished product is 680-700 ℃, the treatment time is 〉=and t (wall thickness) * 4 minute/millimeter.
In above-mentioned alloying constituent, ratio Mn/C 〉=3.5 of manganese and carbon.
In the cold working operation, coefficient of extension is 1.36-1.45 during cold-drawn for the first time, and coefficient of extension is 1.41-1.58 during cold-drawn for the second time, and coefficient of extension is 1.36-1.45 during cold-drawn for the third time.Seam-less carbon steel pipe provided by the invention, because composition and content to carbon steel limit, particularly the proportionlity to manganese and carbon component content limits, coefficient of extension when in addition in the cold working operation, having proposed rational heat treatment temperature, time and cold-drawn, thereby make the present invention have following characteristics: can under-60 ℃ temperature condition, normally use, have good low-temperature impact toughness, good, the good mechanical property of processing performance.Under-60 ℃ of temperature, the absorption energy 〉=20J of sample in the Charpy impact test, under-72 ℃ of supercooling temperature conditions, the absorption of sample can be still more than 20J in its Charpy impact test.Product price of the present invention is cheap, can replace the expensive alloy seamless steel pipe from external import, is particularly suitable for using fishing on the fishing boat of tuna.
The low-temperature performance of the trade mark 1 compares among low-temperature performance of the present invention and the USS ASTMA334/A334M-91, result such as following table:
| Specimen size | Specimen temperature | Ballistic work (J) | |
| USS | 2.5×10×55 | ????-46℃ | ????5 |
| Carbon steel of the present invention | 2.5×10×55 | ????-60℃ | ????＞20 |
| Carbon steel of the present invention | 2.5×10×55 | ????-72℃ | ????＞20 |
The ambient temperature mechanical properties of ambient temperature mechanical properties of the present invention and USS ASTMA334/A334M is compared as follows:
| ????б sMPa | ????б bMPa | ????δ s％ | |
| USS | ????----- | ????415 | ????≥22 |
| The present invention | ????≥240 | ????≥330 | ????≥30 |
Embodiment embodiment 1:
Chemical ingredients and the content of making low-temperature seam-less carbon steel pipe see the following form (being weight percentage):
| ?C | ?Mn | ?Si | ??P | ??S | ?Cr | ?Mo | ??V | ?Ni | ?Cu | ????Als | ??[N] | [O] |
| ?0.10 | ?0.51 | ?0.25 | ??0.01 | ??0.005 | ?0.12 | ?0.0 | ??0.02 | ?0.08 | ?0.14 | ???0.008 | ??≤72 ??PPM | ≤38 PPM |
Mn/C=5.1 wherein, the pipe that adopts mentioned component and content to make obtains seam-less carbon steel pipe through hot-work, perforation, cold-drawn, finished product after handling again.In the cold-drawn operation, it is that stove carries out at the bottom of the 16mm roller that double fished pipe heat-treated, and sees the following form:
| Handle passage | Treatment temp ℃ | Treatment time (branch/millimeter) |
| Work in-process | ????680 | ????6 |
| Before the finished product | ????900 | ????4.5 |
| Finished product | ????690 | ????6 |
In the cold working operation, the steel pipe cold-drawing technology requires to see the following form:
| The draw passage | The draw specification | Coefficient of extension | Draft % | Internal mold size mm | Draw power KN |
| ????0 | ??63×5.5 | ||||
| ????1 | ??53×4.5 | ??1.45 | ?31 | ????F44×49 | 248 |
| ????2 | ??42.7×3.5 | ??1.58 | ?36.7 | ????F36×40.5 | 202 |
Because other processing step and condition and existing seam-less carbon steel pipe are basic identical, therefore repeat no more.
Above-mentioned finished product weldless steel tube is carried out the low-temperature impact work test, and its result is as follows:
| Test temperature ℃ | 3 sample means (J) | 2 sample individual values (J) | 1 sample Schwellenwert (J) |
| ????-60 | ????24 | ????25/23 | ????23 |
Metallographic examination:
| Grade of steel DW10 | Prior austenite grain size | Two test piece ranks are poor |
| ????7.0 | ????1.0 | |
| ????8.0 |
Embodiment 2
Chemical ingredients and the content of making low-temperature seam-less carbon steel pipe see the following form (being weight percentage):
| ?C | ?Mn | ?Si | ??P | ??S | ?Cr | ?Mo | ??V | ?Ni | ?Cu | ?Als | [N] | [O] |
| ?0.09 | ?0.56 | ?0.23 | ??0.015 | ??0.006 | ?0.12 | ?0.02 | ??0.01 | ?0.01 | ?0.16 | ?0.06 | ≤70 ?PPM | ≤30 ?PPM |
Mn/C=6.2 wherein, the pipe that adopts mentioned component and content to make obtains seam-less carbon steel pipe through hot-work, perforation, cold-drawn, finished product after handling again.In the cold-drawn operation, it is that stove carries out at the bottom of the 16mm roller that double fished pipe heat-treated, and sees the following form:
| Handle passage | Treatment temp ℃ | Treatment time (branch/millimeter) |
| Work in-process | ????720 | ????4 |
| Before the finished product | ????920 | ????4.5 |
| Finished product | ????680 | ????6 |
In the cold working operation, the steel pipe cold-drawing technology requires to see the following form:
| The draw passage | The draw specification | Coefficient of extension | Draft % | Internal mold size mm | Draw power KN |
| ????0 | ??64×5.5 | ||||
| ????1 | ??54×4.6 | ??1.42 | ????30 | ?F44×49 | ?245 |
| ????2 | ??42.7×3.5 | ??1.58 | ????37 | ?F36×40.5 | ?210 |
Because other processing step and condition and existing seam-less carbon steel pipe are basic identical, therefore repeat no more.
Above-mentioned finished product weldless steel tube is carried out the low-temperature impact work test, and its result is as follows:
| Test temperature ℃ | 3 sample means (J) | 2 sample individual values (J) | 1 sample Schwellenwert (J) |
| -62 | 25 | 26/24 | 24 |
Metallographic examination:
| Grade of steel DW10 | Prior austenite grain size | Two test piece ranks are poor |
| ????8.0 | ????0 | |
| ????8.0 |
Embodiment 3
Chemical ingredients and the content of making low-temperature seam-less carbon steel pipe see the following form (being weight percentage):
| ?C | ?Mn | ?Si | ??P | ??S | ?Cr | ?Mo | ??V | ?Ni | ?Cu | ?Als | ?[N] | [O] |
| ?0.11 | ?0.60 | ?0.20 | ??0.005 | ??0.010 | ?0.15 | ?0.01 | ??0 | ?0.010 | ?0.18 | ?0.08 | ?65PPM | 17PPM |
Mn/C=5.4 wherein, the pipe that adopts mentioned component and content to make obtains seam-less carbon steel pipe through hot-work, perforation, cold-drawn, finished product after handling again.In the cold-drawn operation, it is that stove carries out at the bottom of the 16mm roller that double fished pipe heat-treated, and sees the following form:
| Handle passage | Treatment temp ℃ | Treatment time (branch/millimeter) |
| Work in-process | ????690 | ????5 |
| Before the finished product | ????900 | ????5 |
| Finished product | ????700 | ????6 |
In the cold working operation, the steel pipe cold-drawing technology requires to see the following form:
| The draw passage | The draw specification | Coefficient of extension | Draft % | Internal mold size mm | Draw power KN |
| ????0 | ??65×5.5 | ||||
| ????1 | ??53×4.5 | ??1.45 | ??31 | ??F44×49 | ??250 |
| ????2 | ??42.7×3.5 | ??1.58 | ??36.7 | ??F36×40.5 | ??202 |
Because other processing step and condition and existing seam-less carbon steel pipe are basic identical, therefore repeat no more.
Above-mentioned finished product weldless steel tube is carried out the low-temperature impact work test, and its result is as follows:
| Test temperature ℃ | 3 sample means (J) | 2 sample individual values (J) | 1 sample Schwellenwert (J) |
| ????-72 | ????25 | ?????25/25 | ??????25 |
Metallographic examination:
| Grade of steel DW10 | Prior austenite grain size | Two test piece ranks are poor |
| ????7.0 | ????1.0 | |
| ????8.0 |
Claims (3)
1, a kind of low-temperature seam-less carbon steel pipe, its feature is in the alloying constituent of steel pipe and content (weight percent): C≤0.13, Si≤0.30, Mn0.40-1.20, P≤0.02, S≤0.02, Cr≤0.20, Mo≤0.10, V≤0.10, Ni≤0.20, Cu≤0.20, Als≤0.12, surplus is iron Fe, is that raw material is through the tubulation base with the mentioned component, hot-work, cold working and finished product obtain seam-less carbon steel pipe after handling, wherein: in the cold working operation, 1, the temperature that double fished pipe heat-treated is 680-720 ℃, treatment time is 〉=t (wall thickness) * 4 minute/millimeter, and 2, normalizing temperature before the finished product is 900-930 ℃, the treatment time is 〉=and t (wall thickness) * 3 minute/millimeter, 3, the treatment temp of finished product is 680-700 ℃, the treatment time is 〉=and t (wall thickness) * 4 minute/millimeter.
2, low-temperature seam-less carbon steel pipe according to claim 1, its feature are in in above-mentioned alloying constituent, ratio Mn/C 〉=3.5 of manganese and carbon.
3, low-temperature seam-less carbon steel pipe according to claim 1, its feature is in in the cold working operation, coefficient of extension is 1.36-1.45 during cold-drawn for the first time, and coefficient of extension is 1.41-1.58 during cold-drawn for the second time, and coefficient of extension is 1.36-1.45 during cold-drawn for the third time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109639 CN1210429C (en) | 2002-04-30 | 2002-04-30 | Low-temperature seam-less carbon steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109639 CN1210429C (en) | 2002-04-30 | 2002-04-30 | Low-temperature seam-less carbon steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1398998A true CN1398998A (en) | 2003-02-26 |
| CN1210429C CN1210429C (en) | 2005-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02109639 Expired - Fee Related CN1210429C (en) | 2002-04-30 | 2002-04-30 | Low-temperature seam-less carbon steel pipe |
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| Country | Link |
|---|---|
| CN (1) | CN1210429C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706020B (en) * | 2009-11-23 | 2011-01-19 | 天津商业大学 | Method for preparing high alloy steel seamless steel pipe |
| CN102691002A (en) * | 2012-06-01 | 2012-09-26 | 内蒙古包钢钢联股份有限公司 | Nuclear electric weldable seamless carbon steel pipe and production method thereof |
-
2002
- 2002-04-30 CN CN 02109639 patent/CN1210429C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706020B (en) * | 2009-11-23 | 2011-01-19 | 天津商业大学 | Method for preparing high alloy steel seamless steel pipe |
| CN102691002A (en) * | 2012-06-01 | 2012-09-26 | 内蒙古包钢钢联股份有限公司 | Nuclear electric weldable seamless carbon steel pipe and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1210429C (en) | 2005-07-13 |
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| C06 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: DALIAN ZHONGXIN SEAMLESS PIPE CO., LTD. Free format text: FORMER OWNER: DALIAN SEAM-LESS STEEL PIPE UNION CO. Effective date: 20031231 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20031231 Address after: 116001 No. 382, Wuchang street, Zhongshan District, Liaoning, Dalian Applicant after: Dalian Zhongxin Seam-less Steel Pipe Co., Ltd. Address before: 116001 No. 382, Wuchang street, Zhongshan District, Liaoning, Dalian Applicant before: Dalian Seam-less Steel Pipe Union Co. |
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Addressee: Che Wanrong Document name: payment instructions |
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Addressee: Che Wanrong Document name: Notification of Termination of Patent Right |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |