CN1715434A - Method for producing high strength high toughness x80 pipeline steel and its hot-rolled plate - Google Patents

Method for producing high strength high toughness x80 pipeline steel and its hot-rolled plate Download PDF

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CN1715434A
CN1715434A CN 200410025584 CN200410025584A CN1715434A CN 1715434 A CN1715434 A CN 1715434A CN 200410025584 CN200410025584 CN 200410025584 CN 200410025584 A CN200410025584 A CN 200410025584A CN 1715434 A CN1715434 A CN 1715434A
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steel
controlled
pipe line
line steel
rolling
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CN1318631C (en
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高珊
郑磊
杨晓臻
胡会军
陆敏
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
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Abstract

The present invention relates to production process of pipeline steel and its hot rolled plate, and is especially production process of one kind of high strength and high toughness X80 pipeline steel and its hot rolled plate coil. The high strength and high toughness X80 pipeline steel consists of: C 0.025-0.080 wt%, Si 0.19-0.30 wt%, Mn 1.70-1.90 wt%, Ti 0.01-0.02 wt%, Al 0.015-0.040 wt%, V 0.055-0.065 wt%, Ni not more than 0.30 wt%, Cr not more than 0.02 wt%, B not more than 0.0002 wt%, P not more than 0.018 wt%, S not more than 0.005 wt%, Ca 0.002-0.003 wt%, Mo 0.20-0.40 wt%, Cu not more than 0.30 wt%, Nb 0.02-0.08 wt%, N not more than 0.06 wt%, O not more than 0.004 wt%, and H not more than 0.00025 wt% except Fe and small amount of impurity. The high strength and high toughness X80 pipeline steel is mainly used in oil and gas pipeline with relatively high toughness requirement on steel.

Description

High-intensity high-tenacity X80 pipe line steel and hot rolled plate making process thereof
Technical field: the present invention relates to the manufacture method of a kind of pipe line steel and hot-rolled sheet thereof, particularly a kind of high-intensity high-tenacity X80 pipe line steel and hot rolled plate making process thereof.
Background technology: pipeline steel occupies an important position in metal material field all the time, at present oil, the Sweet natural gas of overwhelming majority of countries are all followed API API 5L standard with steel pipe in the world, according to its hot worked mode and final finished shape two kinds of hot-rolled sheet coil and sheet materials (slab) are arranged.At present, from the document that the patented technology of pipe line steel application and some periodicals are delivered, it is more that pipe line steel hangs down the patented technology of grade of steel, slab aspect.But because the singularity of pipe engineering, the X80 pipe line steel is also few at the example of application and manufacture view.The above pipe line steel of X80 level is controlled rolling and quickens the refrigerative low-carbon micro steel-alloy, is the leading steel of gas transmission in this century Trunk Line, has excellent anti-ductile fracture performance.Global Manufactured X80 gas pipe line mainly concentrates on Germany and Canada at present, sees the following form 1.China " is still generally using the X70 pipe line steel at present on the West-east Gas; And that X80 compares X70 intensity is bigger, so the X80 steel has considerable market outlook.
The global Manufactured X80 gas pipe line of table 1
Time The area Title Length/km Caliber/mm Wall thickness/mm
1985 Germany Megel 3.2 1118 13.6
1986 Slovakia The 4th oil pipeline 1.5 1422 15.6
1990 Canada Nova Express East 2.6 1219 10.6
1992 Germany Ruhr gas Project 250 1219 18.4
1994 Canada Nova Matzhiwian 54 1219 12.0
1995 Canada East Alberta System 33 1219 12.0
1997 Canada Central Alberta System 91 1219 12.0
1997 Canada East Alberta System 27 1219 12.0
Japanese Patent JP 2002129288 discloses " high strength pipe bend and itsmanufacturing method ", wherein API X80-100 ladle contains: C≤0.03%, Si≤0.3%, Mn 0.8-2.5%, P≤0.015%, S≤0.005%, Nb 0.01-0.05%, Ti 0.005-0.030%, Al≤0.05%, N 0.001-0.06%, and other any metal Ni 0.01-1.0%, Cu0.1-1.2%, Cr 0.1-1.0%, V 0.01-0.10%, Ca 0.001-0.005%, Mg0.0001-0.002%, other is an iron, Q=2.2-3.7, Q=2.7C+0.4Si+Mn+0.8Cr+0.5 (Ni+Cu)+Mo+V.The raw material steel pipe is 800-1000 ℃ of hot rolling, and bending is quenched then, obtains final bend pipe product.Chinese patent application 01126611.2 discloses " a kind of low-carbon low-alloy steel and pipe ", and this invention relates to a kind of low-carbon low-alloy steel and pipe, belongs to the metal iron and steel domain.Technical problem to be solved is to increase the obdurability of steel alloy and improve hardening capacity and welding property.Low-carbon low-alloy steel comprises following element: carbon: 0.10～0.16%; Silicon: 0.20～0.40%; Manganese: 1.00～1.35%; Aluminium: 0.02～0.035%; Vanadium: 0.07～0.13%; Nickel: 0.05～0.25%; Boron: 0.0005～0.0035%; Phosphorus :≤0.010%; Sulphur :≤0.005%; Molybdenum :≤0.01%; Copper :≤0.20%; Niobium :≤0.01%; Iron and trace impurity: surplus.The low-carbon low-alloy steel of this invention can be made into the tubing of X60～X80 grade of steel line pipe or similar intensity grade of steel.It is not very good that all there is impelling strength in these two patents, and because the higher higher defective of cost that causes of noble metal content.
Summary of the invention: the technical issues that need to address of the present invention are: satisfying the impelling strength that API-5L improves the X80 pipe line steel on to the basis of X80 pipe line steel performance demands, reduce its production cost.Thinking of the present invention is: by specific alloy formula, be aided with suitable complete processing, mainly be to use the thick continuously cast bloom of 250mm, by the recrystallization zone on roughing milling train and the 7 frame tandem rolling units and the controlled rolling and the controlled cooling technology in non-recrystallization district, the high-intensity high-tenacity X80 line steel hot rolling coiled sheet that production specification≤15mm is thick.
Technical scheme of the present invention is: high-intensity high-tenacity X80 pipe line steel, the weight percent of its moiety
Proportioning sees Table 2: table 2 chemical ingredients (wt%)
Element C Mn Si S P Nb Ti V Alt
Scope (wt%) 0.025～ 0.080 1.70～ 1.90 0.190～ 0.300 ≤ 0.0050 ≤ 0.018 0.020～ 0.080 0.010～ 0.020 0.055～ 0.065 0.015～ 0.040
Element Mo Cu Ni Cr B Ca N O H
Scope (wt%) 0.20～ 0.40 ≤ 0.30 ≤ 0.30 ≤ 0.02 ≤ 0.0002 0.0020～ 0.0030 ≤ 0.0060 ≤ 0.0040 ≤ 0.00025
The reasons are as follows for choosing of main moiety:
Carbon: be strengthening element most economical, the most basic in the steel, by solution strengthening and precipitation strength the intensity that improves steel there is obvious effect, but raising C content has negative impact to ductility, toughness and the weldability of steel, therefore modern age pipe line steel evolution be the process that constantly reduces C content, as shown in Figure 1.Reduce the toughness that C content helps to improve steel on the one hand, can improve the welding property of steel on the other hand.From Fig. 1 as seen, pipe line steel can have good weldability when C content is lower than 0.11%.So the C content of current pipeline steel is generally less than 0.11%, to need more the pipe line steel of high tenacity then adopt C less than 0.06% ultralow C content design, the present invention chooses 0.025-0.080%.
Manganese:, be that compensation reduces the main and most economical strengthening element that causes loss of strength in the pipe line steel because of C content by the intensity of solution strengthening raising steel.Mn still enlarges the element of γ phase region, can reduce the γ → α transformation temperature of steel, helps to obtain tiny phase-change product, can improve toughness, the reduction ductile-brittle transition temperature of steel.Therefore the Mn content to the X80 pipe line steel designs in 1.70～1.90% scopes.
Niobium: be one of topmost element in the modern microalloying pipe line steel, fairly obvious to the effect of grain refining.Separate out the austenitic answer of obstruction deformation, recrystallize by NbC strain inducing in the course of hot rolling, when making the rolling deformation austenite structure in non-recrystallization zone of finish rolling stage in phase transformation, controlled rolling and controlled chilling change tiny phase-change product into, so that steel has high strength and high tenacity, the present invention chooses 0.02-0.08%.
Vanadium: have higher precipitation strength effect and more weak grain refining effect, when Nb, V, three kinds of compound uses of microalloy element of Ti, V mainly is by improving the intensity of steel with the VC precipitation strength in ferrite, and the present invention chooses 0.055-0.065%.
Titanium: be strong solid N element, the stoichiometric ratio of Ti/N is 3.42, utilizes the Ti fixing following N of 60ppm in the steel just about 0.02%, can form the TiN precipitated phase of tiny high-temperature stable when sheet billet continuous casting.Austenite crystal when this tiny TiN particle can hinder the slab reheat is effectively grown up, and helps to improve the solid solubility of Nb in austenite, simultaneously the impelling strength of improving welded heat affecting zone is had obvious effect, and the present invention chooses 0.01-0.02%.
Molybdenum: be to enlarge the γ phase region, separate out ferrite earlier when postponing γ → α phase transformation and form, promote the principal element that acicular ferrite forms, phase-change organization plays an important role to control, under certain cooling conditions and coiling temperature, add 0.2～0.4% Mo in the low-carbon (LC) pipe line steel and just can obtain tangible acicular ferrite structure, change to the low temperature direction because of phase transformation simultaneously, can make and organize further refinement, mainly be the intensity that improves steel by the phase transformation strengthening of tissue.
Copper, nickel: can improve the intensity of steel by the solution strengthening effect, Cu also can improve the solidity to corrosion of steel simultaneously, and the adding of Ni mainly is to improve the red brittleness that Cu easily causes in steel, and useful to toughness.In thick specification pipe line steel, also can compensate the strength degradation that the increase because of thickness causes, copper of the present invention, nickel all chooses≤and 0.3%.
The operational path of X80 line steel hot rolling coiled sheet manufacture method is as follows: at first by the technical scheme proportioning get the raw materials ready →
Molten iron pre-desulfurization → LD converter smelting → external refining → continuous casting → slab reheat → control
Make rolling → controlled chilling → batch
Hot rolling technology carries out following control:
(1) slab heating temperature: 1170～1250 ℃;
(2) roughing final temperature: 960～1040 ℃;
(3) finish rolling compression ratio: 〉=75%;
(4) finish rolling final temperature: 800～860 ℃;
(5) coiling temperature: 430～580 ℃.
The invention has the beneficial effects as follows: the present invention on alloy formula, have lower carbon content (0.025～0.080wt%) and higher content of niobium (0.020～0.080wt%), this element cooperates the product that causes being produced to have higher impelling strength.The steel tool acicular ferrite structure that produces satisfies API-5L fully to X80 pipe line steel performance demands.Can satisfy of the requirement of extreme climate environment such as cold, and because it has higher impelling strength, make and to dwindle thickness of pipe under the working conditions satisfying, reach the purpose that reduces cost transfer lime.Compare with the existing steel grade (highest level X70) of producing, the performance of the line steel hot rolling coiled sheet of producing according to technique scheme reaches following requirement:
(1) tensile property:
Target: σ 0.5=580～690MPa, σ b=621～830MPa, σ 0.5/ σ b≤ 0.93, δ 50〉=18%.
(2) v-notch impact property:
Target: test temperature-20 ℃, the ballistic work mean value 〉=120J of 10 * 10 * 55mm sample
Shear area is single 〉=and 80%, average 〉=90%.
(3) DWTT performance:
Target: test temperature-15 ℃, average shear area SA% 〉=85%, single SA% 〉=70%.
(4) horizontal cold-bending property:
Target: d=2a is 180 °, intact.
(5) hardness test: (transverse section hardness)
Target: Hv10≤270.
(6) metallographic structure:
Target: grain fineness number (ASTM E112): 8 grades or thinner.Be organized as acicular ferrite+Polygons iron element
Body+MA tissue.
Description of drawings:
Fig. 1 is the Graville graphic representation of C content in the steel, carbon equivalent and steel weldability relation
Fig. 2 organizes metallograph for embodiment 1 reel number 2438607200 roll bendings
Fig. 3 organizes metallograph for embodiment 1 reel number 2438607300 roll bendings
Fig. 4 organizes metallograph for embodiment 2 reel numbers 4056700300 roll bendings
Embodiment: the X80 line steel hot rolling coiled sheet of embodiment 1:7.9 * 1300 * Cmm
● Chemical Composition (wt%)
Element C Mn Si S P Nb Ti V Alt
Scope 0.07 1.78 0.245 0.0020 0.015 0.04 0.014 0.06 0.03
Element Mo Cu Ni Cr B Ca N O H
Scope 0.24 ≤0.03 ≤0.03 ≤0.02 ≤0.0002 0.0028 0.0040 0.0030 ＜0.00025
● operational path
Molten iron pre-desulfurization → LD converter smelting → external refining (LF, RH, hello Ca silk) → continuous casting →
Slab finishing → slab reheat → controlled rolling → controlled chilling → batch
● the hot rolling technology design
(1) slab heating temperature: 1190 ± 20 ℃;
(2) roughing final temperature: 980 ± 20 ℃
(3) finish rolling compression ratio: 〉=75%
(4) finish rolling final temperature: 830 ± 15 ℃;
(5) coiling temperature: 550 ± 15 ℃;
● results of property
Trial-production coiled sheet traditional performance assay
Reel number σ 0.5MPa σ bMPa σ 0.5/σ b δ 50％ H V10 E CVN-20℃J SA％ bcDWTT
2438607200 611 694 0.88 33 237 97 100
2438607300 617 698 0.88 32 218 91 100
Annotate: be stretched as 45 ° of direction samplings; Impact for horizontal, specimen size is 5 * 10 * 55mm, and laterally clod wash is intact; Fig. 2,3 is seen in metallographic structure.
Manufacturing and designing of the X80 line steel hot rolling coiled sheet of embodiment 2:14.6 * 1550 * Cmm
● Chemical Composition (wt%)
Element C Mn Si S P Nb Ti V Alt
Scope 0.038 1.88 0.20 0.0012 0.015 0.065 0.017 0.045 0.02
Element Mo Cu Ni Cr B Ca N O H
Scope 0.32 0.24 0.27 ≤0.02 ≤0.0002 0.0024 0.0040 0.0030 ＜0.00025
● operational path
Molten iron pre-desulfurization → LD converter smelting → external refining (RH, LF, hello Ca silk) → continuous casting → slab finishing → slab reheat → controlled rolling → controlled chilling → batch
● hot rolling technology
(1) slab heating temperature: 1200 ± 15 ℃;
(2) roughing final temperature: 990 ± 20 ℃
(3) finish rolling compression ratio: 〉=75%
(4) finish rolling final temperature: 820 ± 15 ℃;
(5) coiling temperature: 510 ± 15 ℃;
● results of property
Trial-production coiled sheet traditional performance assay
Reel number σ 0.5MPa σ b MPa σ 0.5/σ b δ 50％ H V10 E CVN-20℃J SA％ bc DWTT
4056700300 590 713 0.84 37 230 313 90
Annotate: stretching, impact are 30 ° of directions samplings; The CVN impact specimen is of a size of 10 * 10 * 55mm; Laterally clod wash is intact, and Fig. 4 is seen in metallographic structure.
Estimate feasibility and prospect that invention is applied: the embodiment that carries out according to the present invention, can estimate this invention under the situation that appointed condition allows, production operation is more easily carried out, and has certain possibility of applying.Especially in recent years the variation of energy structure and to the growth of energy demand has promoted developing rapidly of oil and gas pipeline industry, has longly become one of transportation pipe line principal character today apart from high-pressure delivery.Length has proposed more strict requirement apart from high-pressure delivery to the pipe line steel performance.From considering the operation stability and the security of transport pipe, intensity, toughness to pipeline steel are all had higher requirement, particularly have good crack arrest characteristic and welding property long apart from requirement under the transport condition, the high-intensity high-tenacity pipe line steel becomes the inexorable trend of pipe line steel development.Therefore, high-intensity high-tenacity X80 line steel hot rolling coiled sheet has bigger application prospect.

Claims (2)

1, a kind of high-intensity high-tenacity X80 pipe line steel, the weight percent of its moiety is: carbon 0.025～0.080%; Silicon: 0.19～0.30%; Manganese: 1.70～1.90%; Titanium: 0.01～0.02%; Aluminium: 0.015～0.040%; Vanadium: 0.055～0.065%; Nickel :≤0.30%; Chromium≤0.02%; Boron :≤0.0002%; Phosphorus :≤0.018%; Sulphur :≤0.005%; Calcium: 0.002～0.003%; Molybdenum: 0.20～0.40%; Copper :≤0.30%; Niobium: 0.02～0.08%; Nitrogen :≤0.006%; Oxygen :≤0.004%; Hydrogen :≤0.00025; Iron and trace impurity: surplus.
2, the described high-intensity high-tenacity X80 of claim 1 line steel hot rolling coiled sheet manufacture method, processing step comprises: get the raw materials ready, molten iron pre-desulfurization, LD converter smelting, external refining, continuous casting, slab reheat, controlled rolling, controlled chilling, batch by power 1 proportioning, it is characterized in that: slab heating temperature is controlled at: 1170～1250 ℃; The roughing final temperature is controlled at: 960～1040 ℃; Finish rolling compression ratio: 〉=75%; The finish rolling final temperature is controlled at: 800～860 ℃; Coiling temperature is controlled at: 430～580 ℃.
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CN101412042B (en) * 2008-12-16 2010-10-13 江苏沙钢集团有限公司 Method for controlling shape of X80 pipeline steel hot rolling middle plate
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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS589926A (en) * 1981-07-09 1983-01-20 Kawasaki Steel Corp Production of api standard class x80 steel pipe of superior low temperature toughness
JPS589925A (en) * 1981-07-09 1983-01-20 Kawasaki Steel Corp Production of api standard class x80 steel pipe of superior low temperature toughness
JPH09209037A (en) * 1996-01-31 1997-08-12 Nkk Corp Production of high strength steel plate for line pipe excellent in hic resistance
JPH09324217A (en) * 1996-06-07 1997-12-16 Nkk Corp Manufacture of high strength steel for line pipe, excellent in hic resistance
JP3941211B2 (en) * 1998-03-30 2007-07-04 Ｊｆｅスチール株式会社 Manufacturing method of steel plate for high-strength line pipe with excellent HIC resistance
JP2002129288A (en) * 2000-10-30 2002-05-09 Nippon Steel Corp High strength pipe bend and its manufacturing method
CN1151304C (en) * 2001-08-31 2004-05-26 宝山钢铁股份有限公司 Low-carbon low-alloy steel and pipe
JP4102103B2 (en) * 2002-05-20 2008-06-18 新日本製鐵株式会社 Manufacturing method of high strength bend pipe

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CN106540994A (en) * 2015-09-17 2017-03-29 鞍钢股份有限公司 A kind of method for improving 21mm thickness X70 pipe line steel plate shapes
CN108103410A (en) * 2018-03-05 2018-06-01 石英楠 A kind of pipe line steel of yield strength >=910MPa and preparation method thereof
CN112575158A (en) * 2019-09-29 2021-03-30 宝山钢铁股份有限公司 High-plasticity thick-specification pipeline steel plate and manufacturing method thereof
CN111286592A (en) * 2020-03-18 2020-06-16 本钢板材股份有限公司 Production process of hot-rolled X80 pipeline steel with thickness specification of 21.4mm

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