CN110438390A - A kind of the petroleum pipeline valve body steel and its production method of the big specification pole material of Φ 280mm - Google Patents
A kind of the petroleum pipeline valve body steel and its production method of the big specification pole material of Φ 280mm Download PDFInfo
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- CN110438390A CN110438390A CN201910829546.0A CN201910829546A CN110438390A CN 110438390 A CN110438390 A CN 110438390A CN 201910829546 A CN201910829546 A CN 201910829546A CN 110438390 A CN110438390 A CN 110438390A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
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- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
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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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
Abstract
The invention discloses the petroleum pipeline valve body steel and its production method of a kind of Φ 650mm continuous casting round bloom rolling Φ 280mm pole technique, using electric furnace smelting+external refining+vacuum outgas+continuous casting Φ 650mm continuous casting round bloom, the technique for being rolled into Φ 280mm pole.The petroleum pipeline valve body steel is characterized in that: chemical component is by adjusting C, Cr, Mo, add microalloy element Ni, meet the low temperature impact properties and intensity requirement of steel, the pole of compression ratio >=4 is obtained after rolling by the molten steel that electric furnace smelting process obtains high cleanliness, with degree of purity, high, even tissue and preferable mechanical performance, meet the requirement of petroleum pipeline valve body steel.
Description
Technical field
The present invention relates to steel material technical field, especially a kind of petroleum pipeline valve body steel and its production method.
Background technique
Petroleum pipeline valve body is widely used in oil exploitation and biography as a critical piece in fluid control devices
In defeated industry.Main component of the valve body as valve, the comprehensive performance and forming technology of product directly affect enterprise
Production cost, the working environment of valve receiving and service life etc..With progress of the epoch, petroleum pipeline valve body high pressure,
Use more and more extensive under the complex working conditions such as high temperature, deep cooling, still, the crude oil leakage as caused by valve body quality problems will
It is brought to personal safety as well as the property safety and to the environment (such as: the aquaculture in water resource, seawater) of human survival destructive
Disaster.
201510153826.6 disclose a kind of surface preservative treatment technique of carbon steel valve body for petroleum pipeline,
It is characterized in that, specific steps include: valve body oil removing → pickling → pure water cleaning → chemical nickel plating → slot → pure water cleaning again out
→ heat treatment → polishing → is examined → is packed and stored.Using reasonable raw material proportioning, chemical nickel plating is carried out to carbon steel valve body,
Ten times or more are improved before comparing the anti-corrosion function of valve body surface.But the resistance to low temperature of carbon steel valve body is poor, only fits
For temperate zone, subtropical zone or torrid areas, then occur apparent brittle fracture for extremely frigid zones, fails to reach low-temperature impact tough
The requirement of property function admirable.
201180063435.5 providing a kind of iron-based component containing Gao Meng and its in oil gas and/or petrochemical application
The purposes of aspect.The component includes the carbon and balance iron of the manganese of 5 to 40 weight %, 0.01 to 3.0 weight %.The component can
It optionally include one or more alloy elements in chromium, nickel, cobalt, molybdenum, niobium, copper, titanium, vanadium, nitrogen, boron and combinations thereof.
But the manganese content of this steel grade is higher, precious metal such as nickel, cobalt, molybdenum, niobium, vanadium addition element is more, causes cost of alloy height.
Since the requirement to valve body is very high, the enterprise of relevant production valve body proposes higher, harsher requirement,
To guarantee valve safety and reliability with higher in harsh environment.So not only to valve body surface quality requirement
Height, and the requirement to valve inner quality is also especially high, internal soundness include: chemical component, tensile strength, yield strength,
The contraction percentage of area, elongation percentage, impact value, hardness number etc..
Summary of the invention
In light of the defects in the prior art, the purpose of the invention is to provide a kind of petroleum pipeline valve body steel and its productions
Method, the technological process of production are as follows: electric furnace smelting, external refining, vacuum outgas, continuous casting, rolling.Specifically, the present invention provides
A kind of the petroleum pipeline valve body steel and its production method of Φ 650mm continuous casting round bloom rolling Φ 280mm pole technique, use
Electric furnace smelting+external refining+vacuum outgas+continuous casting Φ 650mm continuous casting round bloom, the technique for being rolled into Φ 280mm pole.
The chemical component of petroleum pipeline valve body steel adds microalloy element Ni, meets the cold temperature impact of steel by adjusting C, Cr, Mo
Energy and intensity requirement, the pole of compression ratio >=4 is obtained by the molten steel that electric furnace smelting process obtains high cleanliness after rolling, and is had
There are high degree of purity, even tissue and preferable mechanical performance, meets the requirement of petroleum pipeline valve body steel.
Explanation of nouns:
VD processing: being mainly used in deoxidation of molten steel, and it is micro- that alloying component under Fruit storage and vacuum can be carried out to molten steel
It adjusts and argon gas stirring, promotion inclusion floating improves Molten Steel Cleanliness.
General Loosen: molten steel in solidification, grown up in the form of dendritic crystal by each crystallization nuclei.In dendritic crystal main shaft and respectively
There is the micropores generated when solidification of molten steel and analysis to collect some low melting point group members, gas and non-metallic inclusion between secondary axes.
Tissue looseness is presented in the substance of these micropores and analysis collection after acid corrosion.Its analysis method is to show as in acidleach test piece
Tissue is not fine and close, in the dim spot and gap being dispersed in whole cross section.How rounded dim spot is or oval.Gap is under magnifying glass
Observation is mostly irregular cavity or round pin hole.Generally there is coarse dendritic crystal main shaft and each time in these dim spots and gap
Between axis, puffs are shaded and axle portion is shinny, do not generate pit then when the extent of corrosion difference in clear zone and dark space is little.
Center porosity: tissue looseness caused by volume contraction and steel ingot centre make gas because final solidified when solidification of molten steel
Caused by body analysis collection and field trash aggregation are more serious.Its analysis method is, in the centre of acidleach test piece in integrated distribution
Gap and dim spot.The main distinction of it and General Loosen is that there is only the centres of sample for gap and dim spot, rather than disperse
In whole cross section.
Segregation: each component phenomenon referred to as segregation unevenly distributed in crystallization in alloy.Its analysis method be
Centre in acidleach test piece, which is presented, corrodes deeper blackening, there is canescence band and loose around blackening sometimes.
Three of the above macrostructure defect (General Loosen, center porosity, segregation), can be by GB/T1979 structural steel low power group
Knit the appendix A evaluation in defect judge picture.
The present invention provides a kind of petroleum pipeline valve body steel, the steel contain the chemistry of following mass percentage contents at
Point: C:0.30~0.33%, Si:0.20~0.35%, Mn:0.65~0.70%, Cr:1.00~1.10%, Ni:0.20~
0.25%, Mo:0.20~0.25%, V :≤0.02%, P≤0.020%, S≤0.015%, Alt≤0.040, gas [H]≤
1.5ppm, [O]≤20ppm, [N]≤100ppm；Remaining is Fe and other inevitable impurity.
Preferably, the petroleum pipeline valve body steel, Ni content meet 0.06C+0.04Si+0.072Mn+0.043Cr+
0.03Mo≤Ni≤0.15C+0.12Si+0.11Mn+0.07Cr+0.05Mo。
Preferably, the petroleum pipeline valve body steel, tensile strength >=655MPa, yield strength >=517MPa, elongation percentage
>=17%, end face shrinking percentage >=35%, -46 DEG C of ballistic work >=27J.
It is furthermore preferred that the petroleum pipeline valve body steel, tensile strength 655-760MPa, yield strength 517-700MPa,
Elongation percentage 17-25%, end face shrinking percentage 35-70%, -46 DEG C of ballistic work 27-50J.
It is furthermore preferred that the petroleum pipeline valve body steel, tensile strength 690-730MPa, yield strength 630-670MPa,
Elongation percentage 19-22%, end face shrinking percentage 55-60%, -46 DEG C of ballistic work 36-40J.
The present invention also provides a kind of production methods of petroleum pipeline valve body steel, it is characterised in that: outside through electric furnace smelting, furnace
Refining, vacuum outgas, continuous casting Φ 650mm continuous casting round bloom are rolled into Φ 280mm pole；Compression ratio >=4.
Preferably, the production method of petroleum pipeline valve body steel, specific production stage are as follows:
(1) electric furnace smelting:
It is smelted in electric arc furnaces, using steel scrap and hot metal charge, hot metal charge ratio > 60%.Tapping require terminal C >=
0.10%, P≤0.015%, other residual element contents are met the requirements of the standard.Tapping process adds steel-core-aluminium with steel stream, and ladle closes
According to the supplying alloy adjustment of each ingredient lower limit when aurification.
(2) external refining:
Ladle falls bell thermometric after reaching LF refining station.It is heated according to thermometric situation power transmission, lime, fluorite, ton is added
Steel lime and fluorite additional amount > 12kg, the sampling analysis under white slag, based on the analysis results, by internally controlling requirement adjustment C, Si, Mn,
The component contents such as Cr, Ni, Mo add the alloys such as ferrosilicon, Gao Meng, Gao Ge, nickel plate, molybdenum-iron by feed bin when adjusting component automatically.
(3) vacuum outgas:
Ladle falls lid forvacuum afterwards in place, and vacuum degree to 40-60pa after-blow argon flow is controlled in 100-150NL/
Min keeps vacuum processing time >=20 minute.Complete analysis smelting component is sampled after broken sky.
(4) continuous casting:
The upper steel temperature of control after VD processing: the first furnace temperature of continuous casting: 1580~1595 DEG C, the second furnace: 1560~1565 DEG C,
After third furnace: 1550~1560 DEG C.
Flow circular-arc type continuous casting machine production Φ 650mm continuous casting round bloom using R16.5m5 machine 5 is made using special continuous casting covering slag
With middle covering agent, long nozzle argon envelope.Using M-EMS and end electromagnetic agitation, improve continuous casting billet structure.It cast
The packet degree of superheat is by 20~30 DEG C of mark controls in journey.
(5) stove heating is heated:
Using stepped heating stove heating, duration >=8 hour are heated, should guarantee that heating steel billet is uniform, again anti-anti-avulsion
Carbon and viscous furnace.
(6) it rolls:
1120 DEG C~1180 DEG C of start rolling temperature.Guarantee 920 DEG C~1020 DEG C of finishing temperature.The specification for being rolled into pole is Φ
250mm, compression ratio >=4.
Preferably, the method also includes heat treatment, heat treatment process includes: normalizing, quenching, tempering.
The normalizing is normalizing, also known as normalizing, is workpiece to be heated to Ac3 (free ferrite is whole when Ac refers to heating
Be changed into the finishing temperature of austenite, usually from 727 DEG C to 912 DEG C) or Acm (Acm is hypereutectoid steel in practical heating
The critical-temperature line of complete austenitizing) more than 30~50 DEG C, keep the temperature a period of time after, taken out from furnace in air or spray
Water, spraying or quenching metal heating processing technology.Its purpose is homogenizes crystal grain refinement and distribution of carbides.
Normalizing, it is air-cooled after being heated to 860-880 DEG C of heat preservation.
The quenching is water or polymer quenching after being heated to 845 DEG C of -885 DEG C of heat preservations.
The tempering is air-cooled after being heated to 650 DEG C of -704 DEG C of heat preservations.
The result of tensile sample after heat treatment are as follows: tensile strength >=655MPa, yield strength >=517MPa, elongation percentage >=
17%, end face shrinking percentage >=35%, -46 DEG C of ballistic work >=27J.
Preferably, steel scrap described in step (1) is high-quality steel scrap, mainly containing the alloy wasting steel of Cr, Mn.
Preferably, other residual element contents described in step (1) are met the requirements of the standard, refer to five-harmful elements content≤
0.015%.Five-harmful elements refer to selenium lead arsenic antimony bismuth, and the overall controls of five-harmful elements is ≤0.015%, mass percent.
Preferably, steel-core-aluminium described in step (1), (Al content 75%), the additional amount of steel-core-aluminium are 1.0-1.2Kg/
t。
Preferably, it is heated described in step (2) according to thermometric situation power transmission, temperature is controlled at 1590-1620 DEG C.
Preferably, addition lime, fluorite described in step (2), lime CaO；Fluorite is CaF2.Additional amount are as follows: per ton
6.0-7.0kg lime is added in steel, and 6.0-7.0kg fluorite is added in steel per ton.Total additional amount of lime described in step (2) and fluorite
12-14kg is added for steel per ton.
Preferably, in step (2), ferrosilicon, Gao Meng, Gao Ge, nickel plate, molybdenum-iron etc. are added by feed bin automatically when adjusting component
Alloy.The ferrosilicon, Gao Meng, Gao Ge, nickel plate, molybdenum-iron are purchase, and those skilled in the art can carry out according to actual needs
Selection.
Preferably, described broken empty for releasing vacuum, can opening lid in step (3).
Preferably, in step (3), ladle falls lid forvacuum afterwards in place, and vacuum degree to 50pa after-blow argon flow controls
In 110-140NL/min, vacuum processing time >=20 minute are kept.
Preferably, in step (3), smelting component is characterized in that, includes by percentage to the quality: C:0.30~
0.33%, Si:0.20~0.35%, Mn:0.65~0.70%, Cr:1.00~1.10%, Ni:0.20~0.25%, Mo:
0.20~0.25%, V :≤0.02%, P≤0.020%, S≤0.015%, Alt≤0.040, gas [H]≤1.5ppm, [O]
≤ 20ppm, [N]≤100ppm；Remaining is Fe and other inevitable impurity.
Ni content should meet 0.06C+0.04Si+0.072Mn+0.043Cr+0.03Mo≤Ni≤0.15C+0.12Si+
0.11Mn+0.07Cr+0.05Mo。
Preferably, in step (4), special continuous casting covering slag is CrMo steel mould flux
CrMo steel privacy protection slag ingredient %
Preferably, in step (4), middle covering agent is using CaO-SiO2-MgO as basic slag system.
Slag system ingredient %
Preferably, in step (5), when heating, is 8-10 hours a length of.
Generated beneficial effect is the chemical component of petroleum pipeline valve body steel of the present invention by adopting the above technical scheme
All meet technical requirements；Electric furnace-continuous casting-Rolling Production mode round steel surface quality is good, and macrostructure is excellent, without mesh
Depending on visible white point, crackle, it is layered, is mingled with, skull patch；Grain structure is finer and closely woven, crystal grain distribution more evenly, to improve valve body
Intensity, meanwhile, and improve its fatigue performance, extend the service life of valve body, designed by reasonable ingredient and heat
Treatment process, resistance to low temperature are largely increased.
The present invention only adds trace alloying element nickel, molybdenum, and cost of alloy is low, function admirable, meets user for petroleum pipeline
The demand of road valve body processing and manufacturing.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated.
Embodiment 1-3
The present embodiment petroleum pipeline valve body is formed with steel chemical composition and its mass percentage content is shown in Table 1, remaining ingredient
For Fe and inevitable impurity.Table 2 is the production technology index of petroleum pipeline valve body steel.Table 3 is the low power of each embodiment
Organize result.Table 4 is the non-metallic inclusion rank of each embodiment.Table 5 is the mechanical property of each embodiment.
The present embodiment production technology includes electric furnace smelting, external refining, vacuum outgas, continuous casting and rolling, concrete technology step
It is rapid as described below:
(1) electric furnace smelting: smelting in the electric arc furnaces of 120 tons of capacity, using high-quality steel scrap and hot metal charge, hot metal charge
Ratio > 60%.Tapping requires terminal C >=0.10%, P≤0.015%, and other residual element contents are met the requirements of the standard.Tapping
Process adds steel-core-aluminium 260kg with steel stream, according to the supplying alloy adjustment of ingredient lower limit when ladle alloying.
(2) external refining: ladle falls bell thermometric after reaching LF refining station.It is heated, is added according to thermometric situation power transmission
Lime, fluorite slag charge, ton steel slag material > 12kg, the sampling analysis under white slag, based on the analysis results, by internally controlling requirement adjustment C,
The component contents such as Si, Mn, Cr, Ni, Mo add ferrosilicon, Gao Meng, Gao Ge, nickel plate, molybdenum-iron etc. by feed bin when adjusting component automatically
Alloy.
(3) vacuum outgas: ladle falls lid forvacuum afterwards in place, and vacuum degree to 50pa after-blow argon flow is controlled in 100-
150NL/min keeps vacuum processing time >=20 minute.Complete analysis smelting component is sampled after broken sky.Its smelting component feature exists
In including by percentage to the quality: C:0.30~0.33%, Si:0.20~0.35%, Mn:0.65~0.70%, Cr:1.00
~1.10%, Ni:0.20~0.25%, Mo:0.20~0.25%, V :≤0.02%, P≤0.020%, S≤0.015%, Alt
≤ 0.040, gas [H]≤1.5ppm, [O]≤20ppm, [N]≤100ppm；Remaining is Fe and other inevitable impurity.
Ni content should meet 0.06C+0.04Si+0.072Mn+0.043Cr+0.03Mo≤Ni≤0.15C+0.12Si+
0.11Mn+0.07Cr+0.05Mo。
(4) continuous casting: the upper steel temperature of control after VD processing: the first furnace temperature of continuous casting: 1580~1595 DEG C, the second furnace: 1560
~1565 DEG C, after third furnace: 1550~1560 DEG C.
Flow circular-arc type continuous casting machine production Φ 650mm continuous casting round bloom using R16.5m5 machine 5 is made using special continuous casting covering slag
With middle covering agent, long nozzle argon envelope.Using M-EMS and end electromagnetic agitation, improve continuous casting billet structure.It cast
The packet degree of superheat is by 20~30 DEG C of mark controls in journey.
(5) it heats stove heating: using stepped heating stove heating, heat duration >=8 hour, should guarantee that heating steel billet is equal
It is even, decarburization and viscous furnace are prevented again.
(6) it rolls: 1120 DEG C~1180 DEG C of start rolling temperature.Guarantee 920 DEG C~1020 DEG C of finishing temperature.It is rolled into pole
Specification is Φ 250mm, compression ratio >=4.
(7) be heat-treated: the sample that 200mm long is intercepted on pole is heat-treated, and heat treatment process: normalizing+quenching (is heated to
845 DEG C -885 DEG C heat preservation after water or polymer quenching)+tempering (be heated to 650 DEG C -704 DEG C heat preservation after it is air-cooled).After heat treatment
The result of tensile sample are as follows: tensile strength >=655MPa, yield strength >=517MPa, elongation percentage >=17%, end face shrinking percentage >=
35%, -46 DEG C of ballistic work >=27J.C:0.30~0.33%, Si:0.20~0.35%, Mn:0.65~0.70%, Cr:1.00
~1.10%, Ni:0.20~0.25%, Mo:0.20~0.25%, V :≤0.02%, P≤0.020%, S≤0.015%, Alt
≤ 0.040, gas [H]≤1.5ppm, [O]≤20ppm, [N]≤100ppm；
Table 1 is the chemical component of various embodiments of the present invention steel
Table 2 is the production technology index of petroleum pipeline valve body steel
Table 3 is the macrostructure of petroleum pipeline valve body steel
| General Loosen | Center porosity | Segregation | |
| Embodiment 1 | 0.5 | 1.0 | 0 |
| Embodiment 2 | 0.5 | 0.5 | 0.5 |
| Embodiment 3 | 1.0 | 0.5 | 0.5 |
| Technical requirements | ≤1.5 | ≤1.5 | ≤2.0 |
Table 4 is the non-metallic inclusion rank of petroleum pipeline valve body steel
| A is thin | A is thick | B is thin | B is thick | C is thin | C is thick | D is thin | D is thick | |
| Embodiment 1 | 1.0 | 0 | 1.0 | 0 | 0 | 0 | 0.5 | 0 |
| Embodiment 2 | 0.5 | 0.5 | 0 | 0.5 | 0.5 | 0 | 0 | 0.5 |
| Embodiment 3 | 1.0 | 0 | 0.5 | 0 | 0 | 0.5 | 0.5 | 0 |
| Technical requirements | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.0 | ≤1.5 | ≤1.5 |
In table 4, A type impurity be it is sulfide-based, the field trash width for being carefully be 2-4um, the width for being slightly be > 4-
12um；B type impurity is alumina type, and the width for being carefully is 2-9um, and the width for being slightly is > 9-15um；C type impurity is silicon
Barbiturates, the width for being carefully are 2-5um, and being slightly is > 5-12um；D type impurity is cyclic oxide class, is carefully that diameter is
3-8um, thick system are > 8-13um.
Table 5 is the mechanical property of petroleum pipeline valve body steel
| Rm/MPa | Rp0.2/MPa | A/% | Z/% | Akv(-46℃)/J | |
| Technical requirements | ≥655 | ≥517 | ≥17 | ≥35 | ≥27 |
| Embodiment 1 | 712 | 651 | 21 | 55 | 36 |
| Embodiment 2 | 698 | 639 | 19 | 56 | 39 |
| Embodiment 3 | 721 | 662 | 20 | 58 | 39 |
Illustrate: Rm (MPa): tensile strength；Rel (MPa): yield strength A (%): elongation after fracture；Z (%): section is received
Shrinkage；HBW: Brinell hardness.With reference to national standard: 228.1 tensile test of metallic materials first part of GB/T: room temperature test method.
Claims (10)
1. a kind of petroleum pipeline valve body steel, which is characterized in that the steel contain following mass percentage contents chemistry at
Point:
C:0.30~0.33%, Si:0.20~0.35%, Mn:0.65~0.70%, Cr:1.00~1.10%, Ni:0.20~
0.25%, Mo:0.20~0.25%, V :≤0.02%, P≤0.020%, S≤0.015%, Alt≤0.040, gas [H]≤
1.5ppm, [O]≤20ppm, [N]≤100ppm；Remaining is Fe and other inevitable impurity.
2. petroleum pipeline valve body steel as described in claim 1, which is characterized in that
The petroleum pipeline valve body steel, Ni content meet 0.06C+0.04Si+0.072Mn+0.043Cr+0.03Mo≤Ni≤
0.15C+0.12Si+0.11Mn+0.07Cr+0.05Mo。
3. petroleum pipeline valve body steel as described in claim 1, which is characterized in that the petroleum pipeline valve body steel, tension
Intensity >=655MPa, yield strength >=517MPa, elongation percentage >=17%, end face shrinking percentage >=35%, -46 DEG C of ballistic work >=27J.
It is furthermore preferred that the petroleum pipeline valve body steel, tensile strength 655-760MPa, yield strength 517-700MPa extend
Rate 17-25%, end face shrinking percentage 35-70%, -46 DEG C of ballistic work 27-50J.
It is furthermore preferred that the petroleum pipeline valve body steel, tensile strength 690-730MPa, yield strength 630-670MPa extend
Rate 19-22%, end face shrinking percentage 55-60%, -46 DEG C of ballistic work 36-40J.
4. the production method of petroleum pipeline valve body steel as described in any one of claims 1-3, it is characterised in that: through electric furnace smelting
Refining, external refining, vacuum outgas, continuous casting Φ 650mm continuous casting round bloom, are rolled into Φ 280mm pole；Compression ratio >=4.
5. the production method of petroleum pipeline valve body steel as claimed in claim 4, which is characterized in that production stage is as follows:
(1) electric furnace smelting:
It is smelted in electric arc furnaces, using steel scrap and hot metal charge, hot metal charge ratio > 60%.Tapping require terminal C >=
0.10%, P≤0.015%, tapping process add steel-core-aluminium with steel stream, are incorporated alloy tune according to each ingredient lower limit when ladle alloying
It is whole；
(2) external refining:
Ladle falls bell thermometric after reaching LF refining station；It is heated according to thermometric situation power transmission, lime, fluorite, ton steel stone is added
Ash and fluorite additional amount > 12kg,
The sampling analysis under white slag by component contents such as internally controlling requirement adjustment C, Si, Mn, Cr, Ni, Mo, is adjusted based on the analysis results
It is made into timesharing and the alloys such as ferrosilicon, Gao Meng, Gao Ge, nickel plate, molybdenum-iron is added by feed bin automatically；
(3) vacuum outgas:
Ladle falls lid forvacuum afterwards in place, and vacuum degree to 40-60pa after-blow argon flow is controlled in 100-150NL/min, protected
Hold vacuum processing time >=20 minute；
Complete analysis smelting component is sampled after broken sky；
(4) continuous casting:
The upper steel temperature of control after VD processing: the first furnace temperature of continuous casting: 1580~1595 DEG C, the second furnace: 1560~1565 DEG C, third
After furnace: 1550~1560 DEG C；
Circular-arc type continuous casting machine is flowed using R16.5m5 machine 5 and produces Φ 650mm continuous casting round bloom, using special continuous casting covering slag, in use
Covering agent, long nozzle argon envelope.Use M-EMS and end electromagnetic agitation；In casting process the packet degree of superheat by 20~
30 DEG C of controls.
(5) stove heating is heated:
Using stepped heating stove heating, duration >=8 hour are heated,
(6) it rolls:
1120 DEG C~1180 DEG C of start rolling temperature.Guarantee 920 DEG C~1020 DEG C of finishing temperature；The specification for being rolled into pole is Φ
250mm, compression ratio >=4.
6. the production method of petroleum pipeline valve body steel as claimed in claim 5, which is characterized in that further include heat treatment, heat
Treatment process includes: normalizing, quenching, tempering.
The normalizing, it is air-cooled after being heated to 860-880 DEG C of heat preservation.
The quenching is water or polymer quenching after being heated to 845 DEG C of -885 DEG C of heat preservations.
The tempering is air-cooled after being heated to 650 DEG C of -704 DEG C of heat preservations.
7. such as the production method of petroleum pipeline valve body steel described in claim 5 or 6, which is characterized in that described in step (1)
Steel-core-aluminium, Al content 75%, the additional amount of steel-core-aluminium are 1.0-1.2Kg/t.
8. such as the production method of petroleum pipeline valve body steel described in claim 5 or 6, which is characterized in that described in step (2)
It is heated according to thermometric situation power transmission, temperature is controlled at 1590-1620 DEG C.
Addition lime, fluorite described in step (2), additional amount are as follows: 6.0-7.0kg lime is added in steel per ton, and steel per ton is added
6.0-7.0kg fluorite；Total additional amount of lime described in step (2) and fluorite is that 12-14kg is added in steel per ton.
9. such as the production method of petroleum pipeline valve body steel described in claim 5 or 6, which is characterized in that in step (3), steel
Packet falls lid forvacuum afterwards in place, and vacuum degree to 50pa after-blow argon flow is controlled in 110-140NL/min, keeps being vacuum-treated
Time >=20 minute.
In step (3), smelting component is characterized in that, includes by percentage to the quality: C:0.30~0.33%, Si:0.20~
0.35%, Mn:0.65~0.70%, Cr:1.00~1.10%, Ni:0.20~0.25%, Mo:0.20~0.25%, V :≤
0.02%, P≤0.020%, S≤0.015%, Alt≤0.040, gas [H]≤1.5ppm, [O]≤20ppm, [N]≤
100ppm；Remaining is Fe and other inevitable impurity.
Ni content meets 0.06C+0.04Si+0.072Mn+0.043Cr+0.03Mo≤Ni≤0.15C+0.12Si+0.11Mn+
0.07Cr+0.05Mo。
10. such as the production method of petroleum pipeline valve body steel described in claim 5 or 6, which is characterized in that
In step (4), special continuous casting covering slag is CrMo steel mould flux；
CrMo steel privacy protection slag ingredient %
In step (4), middle covering agent is using CaO-SiO2-MgO as basic slag system；
CaO-SiO2-MgO slag system ingredient %
In step (5), when heating, is 8-10 hours a length of.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025901A (en) * | 2021-03-03 | 2021-06-25 | 江苏联峰能源装备有限公司 | Steel for petroleum valve body and preparation method thereof |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS505648B1 (en) * | 1970-01-08 | 1975-03-06 | ||
| JPH09324219A (en) * | 1996-06-05 | 1997-12-16 | Kobe Steel Ltd | Production of high strength spring excellent in hydrogen embrittlement resistance |
| CN1616700A (en) * | 2003-08-28 | 2005-05-18 | 河南中原特殊钢厂 | Steel for processing movement limiting core stick of continuous tube grimper and its producing process |
| CN102021485A (en) * | 2009-09-18 | 2011-04-20 | 宝山钢铁股份有限公司 | Medium carbon alloy steel |
| CN102424936A (en) * | 2011-11-28 | 2012-04-25 | 宝山钢铁股份有限公司 | Low temperature impact resistance allay structure steel and manufacture method thereof |
| CN102925811A (en) * | 2012-11-12 | 2013-02-13 | 莱芜钢铁集团有限公司 | Easy-cutting vanadium-feeding high-aluminum nitriding steel and preparation method thereof |
| CN105970095A (en) * | 2016-07-01 | 2016-09-28 | 江苏沙钢集团淮钢特钢股份有限公司 | Track steel having high strength, high abrasion resistance and long fatigue life, and production process for same |
| CN106544594A (en) * | 2016-10-28 | 2017-03-29 | 山东钢铁股份有限公司 | Carbon vanadium steel and preparation method thereof in a kind of drill steel |
| CN107338396A (en) * | 2017-06-28 | 2017-11-10 | 包头钢铁（集团）有限责任公司 | High-hardenability gas storage seamless steel pipe and its production method |
| CN109023112A (en) * | 2018-09-28 | 2018-12-18 | 邢台钢铁有限责任公司 | High-strength weather-resistant cold-forging steel and preparation method thereof |
| CN110129677A (en) * | 2019-05-30 | 2019-08-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Structural alloy steel and preparation method thereof |
-
2019
- 2019-09-03 CN CN201910829546.0A patent/CN110438390B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS505648B1 (en) * | 1970-01-08 | 1975-03-06 | ||
| JPH09324219A (en) * | 1996-06-05 | 1997-12-16 | Kobe Steel Ltd | Production of high strength spring excellent in hydrogen embrittlement resistance |
| CN1616700A (en) * | 2003-08-28 | 2005-05-18 | 河南中原特殊钢厂 | Steel for processing movement limiting core stick of continuous tube grimper and its producing process |
| CN102021485A (en) * | 2009-09-18 | 2011-04-20 | 宝山钢铁股份有限公司 | Medium carbon alloy steel |
| CN102424936A (en) * | 2011-11-28 | 2012-04-25 | 宝山钢铁股份有限公司 | Low temperature impact resistance allay structure steel and manufacture method thereof |
| CN102925811A (en) * | 2012-11-12 | 2013-02-13 | 莱芜钢铁集团有限公司 | Easy-cutting vanadium-feeding high-aluminum nitriding steel and preparation method thereof |
| CN105970095A (en) * | 2016-07-01 | 2016-09-28 | 江苏沙钢集团淮钢特钢股份有限公司 | Track steel having high strength, high abrasion resistance and long fatigue life, and production process for same |
| CN106544594A (en) * | 2016-10-28 | 2017-03-29 | 山东钢铁股份有限公司 | Carbon vanadium steel and preparation method thereof in a kind of drill steel |
| CN107338396A (en) * | 2017-06-28 | 2017-11-10 | 包头钢铁（集团）有限责任公司 | High-hardenability gas storage seamless steel pipe and its production method |
| CN109023112A (en) * | 2018-09-28 | 2018-12-18 | 邢台钢铁有限责任公司 | High-strength weather-resistant cold-forging steel and preparation method thereof |
| CN110129677A (en) * | 2019-05-30 | 2019-08-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Structural alloy steel and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025901A (en) * | 2021-03-03 | 2021-06-25 | 江苏联峰能源装备有限公司 | Steel for petroleum valve body and preparation method thereof |
| CN114540716A (en) * | 2022-03-04 | 2022-05-27 | 马鞍山钢铁股份有限公司 | High-strength high-toughness long-service-life steel for valve body of underwater Christmas tree with wall thickness of more than or equal to 600mm, and heat treatment method and production method thereof |
| CN114574764A (en) * | 2022-03-04 | 2022-06-03 | 马鞍山钢铁股份有限公司 | High-horsepower long-life corrosion-resistant steel for fracturing pump valve body, heat treatment method and production method thereof |
| CN114540716B (en) * | 2022-03-04 | 2022-11-01 | 马鞍山钢铁股份有限公司 | High-strength high-toughness long-service-life steel for valve body of underwater Christmas tree with wall thickness of more than or equal to 600mm, and heat treatment method and production method thereof |
| CN114717479A (en) * | 2022-04-08 | 2022-07-08 | 承德建龙特殊钢有限公司 | Steel for oil clothes valve body and preparation method thereof |
| CN114717479B (en) * | 2022-04-08 | 2022-12-16 | 承德建龙特殊钢有限公司 | Steel for oil clothing valve body and preparation method thereof |
| CN115537659A (en) * | 2022-09-29 | 2022-12-30 | 山东钢铁股份有限公司 | Hot-rolled round steel for tower crane standard knot main chord and production method thereof |
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