CN101736196A - Steel for induction heating bent pipe for oil and gas transmission and production method of hot rolled plate thereof - Google Patents
Steel for induction heating bent pipe for oil and gas transmission and production method of hot rolled plate thereof Download PDFInfo
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- CN101736196A CN101736196A CN200810228946A CN200810228946A CN101736196A CN 101736196 A CN101736196 A CN 101736196A CN 200810228946 A CN200810228946 A CN 200810228946A CN 200810228946 A CN200810228946 A CN 200810228946A CN 101736196 A CN101736196 A CN 101736196A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 29
- 239000010959 steel Substances 0.000 title claims abstract description 29
- 230000006698 induction Effects 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 230000005540 biological transmission Effects 0.000 title abstract 2
- 238000005096 rolling process Methods 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000009749 continuous casting Methods 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 238000003723 Smelting Methods 0.000 claims abstract description 3
- 238000007670 refining Methods 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 229910052720 vanadium Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000011572 manganese Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 238000005275 alloying Methods 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- 239000010955 niobium Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 238000007669 thermal treatment Methods 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 5
- 229910001566 austenite Inorganic materials 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000013003 hot bending Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
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- Heat Treatment Of Steel (AREA)
Abstract
The invention provides an economical steel for induction heating bent pipes for oil and gas transmission and a production method of a hot rolled plate thereof, wherein the steel comprises the following chemical components: 0.06% -0.11%, Si: 0.15% -0.30%, Mn: 1.50% -1.80%, Nb: 0.03-0.06%, Ti: 0.010% -0.025%, Als: 0.010-0.045%, and the balance of iron and inevitable impurities. The production method comprises smelting, external refining, continuous casting and rolling, wherein the heating temperature of a continuous casting billet in the rolling process is 1100-1150 ℃, the rough rolling temperature is 960-1000 ℃, the deformation of each pass is more than 15%, the finish rolling temperature is 780-920 ℃, the accumulated deformation is 55-75%, the cooling speed after rolling is 15-35 ℃/s, and the final cooling temperature is 400-550 ℃, and then air cooling is carried out. Under the condition of not increasing production procedures, the invention reduces the production cost by reducing the content of noble alloy elements and optimizing the production process, ensures that the steel plate reaches the standard of steel for X80-grade induction heating bent pipes, and simultaneously ensures the performance stability of the material after heat treatment.
Description
Technical field
The invention belongs to the low-carbon micro steel-alloy technical field, relate in particular to and make high pressure, heavy caliber petroleum natural-gas transfer pipeline steel for induction heating syphon.
Background technology
Induction heating syphon is the multiple position of pipeline accident as the comparatively harsh structural part of carrying in the pipeline, and the height of bending quality is the important factor in order that can pipeline safe operation, and this has good comprehensive performances with regard to the hot-rolled steel sheet that requires to make bend pipe and use.
At present, the bend pipe highest level of widely applying in the domestic engineering is X70 level (a yield strength 490MPa level).The curved tube steel of Shi Yonging adopts low carbon component design usually all the time, as publication number is the Japanese bend pipe patent of JP2002-129288, its composition is that (weight percent) is below the C:0.03%, below the Si:0.30%, Mn:0.8%～2.5%, below the P:0.015%, below the S:0.005%, Nb:0.01%～0.05%, Ti:0.005%～0.030%, below the Al:0.05%, need add in the following element one or more in addition, comprise Ni:0.1%～1.0%, Cu:0.1%～1.2%, Cr:0.1%～1.0%, Mo:0.1%～1.0%, V:0.01%～0.10%, Ca:0.001%～0.005%, Mg:0.0001%～0.0020%; And requiring Q value scope is 2.2～3.7%, wherein Q=2.7C+0.4Si+Mn+0.8Cr+0.45 (Ni+Cu)+Mo+V.Because C content is low in this patent composition, therefore needs to add a large amount of other alloying elements and come guaranteed performance, the production cost height; In addition, intensity reduced after same because its low C design can cause material heat treatment, so be difficult for guaranteeing material property.
Though, Chinese patent " production method of high-ductility steel for hot-bending bends and hot rolled slab thereof " CN 200610048022.0 discloses a kind of steel for induction heating syphon of high carbon component design in the recent period, help guaranteeing material property after the thermal treatment, its composition (weight percent) is C:0.04%～0.12%, Si:0.10%～0.30%, Mn:1.50%～1.65%, Nb:0.04%～Ti:0.008%～0.025%, Ni:0.15%～0.36%, Mo:0.15%～0.45%, Cu:0.15%～0.30%, and surplus is iron and unavoidable impurities.But valuable alloying element content is very high in this patent composition, so the production cost height.
In a word, steel for induction heating syphon of the prior art exists valuable alloying element content many, production cost height, and problem such as unstable properties after the thermal treatment.
Summary of the invention
The objective of the invention is to overcome the problem of unstable properties after the high and thermal treatment of production cost in the prior art, a kind of economy type X 80 grade high ductility steel for induction heating syphon is provided.
The chemical component weight per-cent of the economical steel for induction heating syphon for oil gas transportation of the present invention is C:0.06%～0.11%, Si:0.15%～0.30%, Mn:1.50%～1.80%, Nb:0.03%～0.06%, Ti:0.010%～0.025%, Als:0.010%～0.045%, and surplus is iron and unavoidable impurities.
Steel for induction heating syphon of the present invention also can contain Ni and/or V, and its weight percent is Ni＜0.25%, V＜0.06%; The Q value of described steel for induction heating syphon is less than 2.2% (weight percent), wherein Q=2.7C+0.4Si+Mn+0.8Cr+0.45 (Ni+Cu)+Mo+V.
Composition design reason of the present invention:
Carbon is as proof strength effective elements the most, and its content will directly influence and roll stability after attitude armor plate strength and the thermal treatment, and therefore, carbon content should not be low excessively; And on the other hand, the increase of carbon content is bigger to toughness and weldability harm, so carbon content can not be too high.Prior art be controlled at carbon content below 0.03% or in the bigger fluctuation range (0.04%～0.12%) to guaranteeing that material property is disadvantageous, it is 0.06%～0.11% comparatively suitable to it is considered herein that carbon is controlled at.
Silicon can play strengthening effect, but its too high levels will promote the formation of crisp sclerous tissueses such as perlite, and 0.15%～0.30%, its preferable range.
Manganese can suppress austenite phase transformation, and crystal grain thinning is played beneficial effect; Simultaneously, manganese still is the solution strengthening element, and the increase of its content is favourable to improving the strength of materials; As cheap element, manganese can guarantee material property by the valuable alloying element of instead of part, plays the effect of reducing cost; But the manganese too high levels is easily brought out segregation, so the present invention is controlled at manganese in 1.50%～1.80% the scope.
The adding of niobium, vanadium, titanium can be played effects such as refined crystalline strengthening, precipitation strength, solution strengthening, to improving material property good effect is arranged; And, niobium, vanadium, titanium in heat treatment process, also have hinder that austenite crystal is grown up, thinning microstructure and precipitation strength effect, help improving material property after the thermal treatment.
Nickel in the composition can play the solution strengthening effect, and is also helpful to toughness of material, but because its price is higher, unsuitable excessive use, the present invention is controlled at it less than in 0.25% the scope.
Can not add vanadium and/or nickel in the composition, the performance loss that it caused can and/or change production technique by other constituent content of suitable adjustment and replace.
Q value of the present invention is less than 2.2% (weight percent), wherein Q=2.7C+0.4Si+Mn+0.8Cr+0.45 (Ni+Cu)+Mo+V.The Q value of prior art is higher, mainly due to comprising more alloying element, the large usage quantity of especially valuable alloying element in its composition.
The production method of the hot rolled slab of steel for induction heating syphon of the present invention comprises smelting, external refining, continuous casting and rolling, the Heating temperature that is characterized in continuously cast bloom in the operation of rolling is 1100～1150 ℃, be 1.3～2.0min/mm heat-up time, adopt this heating process can prevent as far as possible when guaranteeing the abundant solid solution of composition interalloy element that austenite crystal from growing up, if Heating temperature is crossed low and/or heat-up time is too short, then be unfavorable for the alloying element dissolving, if Heating temperature is too high and/or heat-up time is long then can cause austenite crystal too to be grown up, influence material property; Carry out the controlled rolling of two stages, the roughing temperature is 960～1000 ℃, every time deflection of rough rolling step is greater than 15%, final rolling temperature is 780～920 ℃, finish rolling stage accumulative total deflection is 55%～75%, makes the austenite crystal refinement and to a certain degree predeformation is arranged to reduce the grain-size after the phase transformation by two stage rolling, accurately controlled rolling temperature and deflection crystal grain thinning more effectively, avoid occurring mixed crystal simultaneously, cause material property to worsen; Carry out controlled chilling after rolling, open 730～780 ℃ of cold temperature, speed of cooling is 15～35 ℃/s, and final cooling temperature is 400～550 ℃, and air cooling is to room temperature subsequently; Suitably select to open cold temperature and final cooling temperature and can make in the final tissue of material each collocation is more reasonable mutually, and the effective control material grain fineness number of speed of cooling makes it to reach more than 11 grades.
Compared with prior art, the present invention is not when additionally increasing production process, by reducing valuable alloying element content in the composition (no Mo, low Ni, low Nb), rely on the existing production technique of optimization significantly to reduce production costs, make production cost reduce 15%～25%; And guarantee that steel plate can reach the requirement of X80 level (yield strength 560MPa level) steel for induction heating syphon standard, have good comprehensive performances, simultaneously, the reasonable component design has effectively guaranteed the stability after the material heat treatment.
Embodiment
The present invention is further described by the following embodiment.
The chemical ingredients of the embodiment of the invention sees Table 1.The rolling technology of corresponding embodiment sees Table 2.Its service check the results are shown in Table 3.Performance after the modified thermal treatment sees Table 4.
The chemical ingredients of the economical steel for induction heating syphon for oil gas transportation of table 1 embodiment of the invention
| Embodiment | ??C | ??Si | ??Mn | ??P | ??S | ??Ni | ??Ti | ??Nb | ??V | ??Als |
| ??1 | ??0.08 | ??0.24 | ??1.72 | ??0.008 | ??0.002 | ??0.18 | ??0.015 | ??0.05 | ??0.04 | ??0.023 |
| ??2 | ??0.09 | ??0.26 | ??1.70 | ??0.008 | ??0.002 | ??0.19 | ??0.020 | ??0.05 | ??0.03 | ??0.04 |
| ??3 | ??0.06 | ??0.28 | ??1.77 | ??0.006 | ??0.002 | ??0.23 | ??0.022 | ??0.03 | ??- | ??0.026 |
| ??4 | ??0.11 | ??0.18 | ??1.53 | ??0.010 | ??0.002 | ??0.13 | ??0.010 | ??0.06 | ??- | ??0.030 |
| ??5 | ??0.10 | ??0.22 | ??1.75 | ??0.008 | ??0.002 | ??- | ??0.015 | ??0.05 | ??- | ??0.026 |
The rolling technology of the economical steel for induction heating syphon for oil gas transportation of table 2 embodiment of the invention
| Embodiment | Heating temperature, ℃ | The roughing temperature range, ℃ | Rough rolling step accumulative total deflection, % | The final rolling temperature interval, ℃ | Finish rolling stage accumulative total deflection, % | Cooling rate, ℃/s | Final cooling temperature, ℃ |
| ??1 | ??1140 | ??970-1000 | ??74 | ??910-800 | ??58 | ??23 | ??512 |
| ??2 | ??1150 | ??970-1000 | ??72.5 | ??910-820 | ??60 | ??15 | ??544 |
| ??3 | ??1140 | ??960-1000 | ??65 | ??920-780 | ??68 | ??25 | ??489 |
| ??4 | ??1120 | ??960-990 | ??60 | ??900-800 | ??72.5 | ??20 | ??510 |
| ??5 | ??1100 | ??960-990 | ??63 | ??920-810 | ??70 | ??32 | ??457 |
The performance of the economical steel for induction heating syphon for oil gas transportation of table 3 embodiment of the invention
Performance after the economical steel for induction heating syphon for oil gas transportation of table 4 embodiment of the invention is modified
Claims (4)
1. steel for induction heating syphon for oil gas transportation, the chemical component weight per-cent that it is characterized in that this steel is C:0.06%～0.11%, Si:0.15%～0.30%, Mn:1.50%～1.80%, Nb:0.03%～0.06%, Ti:0.010%～0.025%, Als:0.010%～0.045%, and surplus is iron and unavoidable impurities.
2. steel for induction heating syphon according to claim 1 is characterized in that also containing Ni and/or V, and its weight percent is Ni＜0.25%, V＜0.06%.
3. steel for induction heating syphon according to claim 1 and 2, the Q value that it is characterized in that this steel be less than 2.2%, wherein Q=2.7C+0.4Si+Mn+0.8Cr+0.45 (Ni+Cu)+Mo+V.
4. claim 1, the production method of the hot rolled slab of 2 or 3 described steel for induction heating syphon, comprise smelting, external refining, continuous casting and rolling, the Heating temperature that it is characterized in that continuously cast bloom in the operation of rolling is 1100～1150 ℃, be 1.3～2.0min/mm heat-up time, the roughing temperature range is 960～1000 ℃, every time deflection of rough rolling step is greater than 15%, the final rolling temperature interval is 780～920 ℃, finish rolling stage accumulative total deflection is 55%～75%, rolling back controlled chilling speed is 15～35 ℃/s, the final cooling temperature interval is 400～550 ℃, afterwards air cooling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810228946A CN101736196A (en) | 2008-11-18 | 2008-11-18 | Steel for induction heating bent pipe for oil and gas transmission and production method of hot rolled plate thereof |
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| CN200810228946A CN101736196A (en) | 2008-11-18 | 2008-11-18 | Steel for induction heating bent pipe for oil and gas transmission and production method of hot rolled plate thereof |
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| CN101736196A true CN101736196A (en) | 2010-06-16 |
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| CN200810228946A Pending CN101736196A (en) | 2008-11-18 | 2008-11-18 | Steel for induction heating bent pipe for oil and gas transmission and production method of hot rolled plate thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373387A (en) * | 2011-11-02 | 2012-03-14 | 武汉钢铁(集团)公司 | Steel plate for large-strain cold-bent tube and manufacturing method thereof |
| CN102400039A (en) * | 2010-09-07 | 2012-04-04 | 鞍钢股份有限公司 | Steel with good low-temperature toughness for slurry conveying pipeline and manufacturing method thereof |
| CN103981460A (en) * | 2014-05-30 | 2014-08-13 | 秦皇岛首秦金属材料有限公司 | Hot rolling flat steel for high toughness X80 elbow and production method thereof |
| CN105063483A (en) * | 2015-08-27 | 2015-11-18 | 攀钢集团西昌钢钒有限公司 | X65 pipeline steel and production method thereof |
| CN115198181A (en) * | 2022-06-28 | 2022-10-18 | 马鞍山钢铁股份有限公司 | Edge-crack-free 355 Mpa-grade hot-rolled coil for thick-specification tube making and manufacturing method thereof |
-
2008
- 2008-11-18 CN CN200810228946A patent/CN101736196A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400039A (en) * | 2010-09-07 | 2012-04-04 | 鞍钢股份有限公司 | Steel with good low-temperature toughness for slurry conveying pipeline and manufacturing method thereof |
| CN102373387A (en) * | 2011-11-02 | 2012-03-14 | 武汉钢铁(集团)公司 | Steel plate for large-strain cold-bent tube and manufacturing method thereof |
| CN103981460A (en) * | 2014-05-30 | 2014-08-13 | 秦皇岛首秦金属材料有限公司 | Hot rolling flat steel for high toughness X80 elbow and production method thereof |
| CN105063483A (en) * | 2015-08-27 | 2015-11-18 | 攀钢集团西昌钢钒有限公司 | X65 pipeline steel and production method thereof |
| CN115198181A (en) * | 2022-06-28 | 2022-10-18 | 马鞍山钢铁股份有限公司 | Edge-crack-free 355 Mpa-grade hot-rolled coil for thick-specification tube making and manufacturing method thereof |
| CN115198181B (en) * | 2022-06-28 | 2024-01-19 | 马鞍山钢铁股份有限公司 | Hot-rolled coiled plate without edge crack for 355 Mpa-grade thick-specification pipe making and manufacturing method thereof |
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Application publication date: 20100616 |