CN106399862B - A kind of high-intensity corrosion steel and its preparation method and application - Google Patents
A kind of high-intensity corrosion steel and its preparation method and application Download PDFInfo
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- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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Abstract
The invention discloses a kind of high-intensity corrosion steel, include the component of following percentage by weight：<0.02% carbon,<0.5% silicon, 0.4 0.6% manganese ,≤0.015% phosphorus ,≤0.01% sulphur, 9.5 10.5% chromium, 0.35 0.5% nickel, 0.2 0.35% molybdenum ,≤0.65% copper ,≤0.007% aluminium ,≤0.15% titanium ,≤0.04% vanadium ,≤0.12% niobium ,≤0.02% zinc ,≤0.07% tungsten ,≤0.03% cobalt ,≤0.04% tin ,≤0.02% lead, surplus is iron.Beneficial effects of the present invention：Carbon and sulfur content are reduced, refines structure of steel, the molecular structure density for improving steel reaches anti-erosion performance and mechanicalness.Because the tissue of steel is abundant, the diffusion velocity of steel atom is improved, and transgranular in the metallographic structure and chromium of crystal boundary easily reaches balance, so as to play a part of preventing grain boundary corrosion.Meanwhile spot corrosion is replaced with integral planar uniform minimal corrosion, delay corrosion rate.The addition of the alloys such as molybdenum, nickel and copper, intermetallic compound is formed, strengthen matrix.The toughness of crystal grain thinning, further raising material is capable of in the addition of niobium, vanadium and titanium.
Description
Technical field
The present invention relates to steel field, more particularly to a kind of high-intensity corrosion steel and its preparation method and application.
Background technology
Containing H2In the oil well and gas well of S crude oil, natural gas etc. (it is following, oil well and gas well are collectively referred to as " oil
Well "), there is moistening hydrogen-sulfide environmental under steel because sulfide produce stress cracking (hereinafter referred to as " SSC ") the problem of.Cause
This, oil well pipe excellent anti-SSC turns into required.
Anti- SSC sexual partners are as the intensity of steel rises and sharp declines.Therefore, exist under in general appreciation condition in the past
Include 1barH2It is able to ensure that that anti-SSC is only 110ksi in the environment of S NACE solution As (NACETM0177-2005)
Level (yield strength：758~862MPa) steel.Also, as a rule, the 125ksi level (yield strengths of higher intensity：
862~965MPa), 140ksi level (yield strengths：965~1069MPa) steel also can only be in limited H2(example under S partial pressures
Such as, below 0.1bar) anti-SSC can be ensured.In view of harshization of the corrosive environment brought due to the high depth of oil well
It is more severe from now on, therefore the exploitation with higher intensity and the pipe for oil well use steel of high corrosion-resistant is required.
SSC be in corrosive environment by hydrogen caused by steel surface spreads into steel and with the stress of steel institute load
Synergy and cause fracture hydrogen embrittlement one kind.The high steel of SSC sensitiveness are in the negative of the yield strength less than steel
Easily cracked under lotus stress.
20CrMo is a kind of classical structural alloy steel, due to containing a certain amount of Cr and Mo in its component, thus is had
Good comprehensive mechanical performance.20CrMo tensile strength is typically in 885Mpa/mm2More than, yield strength is typically in 685Mpa/
mm2More than, elongation percentage is more than 12%, and the contraction percentage of area is more than 50%, and ballistic work is more than 78J.But due to 20CrMo component compatibilities
The characteristics of, do not possess corrosion resistance substantially, thus can only the common vehicle without requirement for anticorrosion, lathe parts in conduct
In general structural member uses, and is unsuitable for containing K in coastal oil well+、Na+、Ca2+、Mg2+Deng alkaline-earth metal ions and Cl-、
SO4 2-Use, have much room for improvement in the adverse circumstances of ionic liquid.
The content of the invention
It is an object of the invention to provide a kind of high-intensity corrosion steel.The high-intensity corrosion steel not only have excellent structure strong
Degree, also with excellent antiseptic property.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of high-intensity corrosion steel, include the component of following percentage by weight：＜ 0.02% carbon, ＜ 0.5% silicon,
0.4-0.6% manganese ,≤0.015% phosphorus ,≤0.01% sulphur, 9.5-10.5% chromium, 0.35-0.5% nickel, 0.2-
0.35% molybdenum ,≤0.65% copper ,≤0.007% aluminium ,≤0.15% titanium ,≤0.04% vanadium ,≤0.12% niobium,
≤ 0.02% zinc ,≤0.07% tungsten ,≤0.03% cobalt ,≤0.04% tin ,≤0.02% lead, surplus is iron.
By using above-mentioned technical proposal, the percentage by weight of carbon is less than 0.03%, adds chromium, obtains low-carbon martensite
Tissue, corrosion resistance is improved, strengthen toughness.The content of chromium is advantageous to the formation of passivating film in 9.5-10.5%, and enhancing is corrosion-resistant
Property.The addition of the alloys such as molybdenum, nickel and copper, intermetallic compound is formed, strengthen matrix.The addition of niobium, vanadium and titanium can be thin
Change crystal grain, further improve the toughness of material.
Reduce material carbon and sulfur content, refine structure of steel, improve steel molecular structure density reach anti-erosion performance and
Mechanicalness.Because the tissue of steel is abundant, the diffusion velocity of steel atom is improved, and transgranular in metallographic structure and crystal boundary chromium is easy
Reach balance, so as to play a part of preventing grain boundary corrosion.Meanwhile spot corrosion is replaced with integral planar uniform minimal corrosion,
Delay corrosion rate.In addition, the anti-H 2 S resistant to carbon dioxide stress corrosion ability of material is strong.Wherein, the titanium dioxide that can be born
Carbon partial pressure is up to 3.0Mpa, and hydrogen sulfide sectional pressure is up to 0.15MPa.
Another goal of the invention of the present invention is to provide a kind of preparation method of high-intensity corrosion steel, including following prepare walks
Suddenly：
Step 1：Feed charge material into and melting is carried out in electric arc furnaces；
Step 2：Refined into AOD furnace；
Step 3：Refined into LF stoves；
Step 4：Continuous casting and rolling；
Step 5：Temperature control controlled rolling；
Step 6：Heat treatment；
Step 7：Machining；
Add slag former in the electric arc furnaces, AOD furnace and LF stoves, the slag former by following parts by weight component group
Into：
Lime 65-80 parts
Sodium oxide molybdena 5-10 parts
Ferrous oxide 0.3-1 parts
Manganese dioxide 0.3-0.8 parts
Titanium dioxide 5-15 parts
Magnesia 1-3 parts
Aluminium nitride 0.9-1.5 parts
Tungsten carbide 0.6-1.4 parts.
By using above-mentioned technical proposal, furnace charge includes the pig iron and alloy.Wherein, pig iron component (mass fraction)：
3.376-3.379% carbon ,≤0.054% silicon, 0.043-0.066% manganese, 0.0965% phosphorus, 0.0193% sulphur,
≤ 0.0076% aluminium ,≤0.022% zinc ,≤0.077% tungsten ,≤0.033% cobalt ,≤0.044% tin ,≤
0.022% lead, 95.65-95.86% iron.Alloy compositions (percentage for accounting for pig iron component gross mass)：10.31-
11.44% chromium, 0.38-0.54% nickel, 0.22-0.38% molybdenum ,≤0.71% copper ,≤0.16% titanium ,≤
0.04% vanadium ,≤0.13% niobium.
Lime and sodium oxide molybdena are used for improving the basicity of clinker, enhancing and the binding ability of sulfur dioxide and carbon dioxide, from
And the partial pressure of sulfur dioxide and carbon dioxide is reduced, promote sulphur and carbon further to aoxidize generation sulfur dioxide and carbon dioxide.Oxygen
The viscosity of clinker can be reduced by changing ferrous iron and manganese dioxide, improved clinker to the wetness degree of lime and improved clinker in lime sky
Penetrating power in gap, the generation of lime Surface Creation 2CaOSiO2 shells is reduced, so as to promote lime burn-off rate.Dioxy
The addition of change titanium can improve the adsorption capacity for carbon and sulphur, reduce carbon and sulfur content.Magnesia is aoxidized in increase clinker
Content of magnesium, erosion of the clinker to furnace lining is reduced, improve the life-span of furnace lining.The density of clinker is less than molten steel, is generally covered in molten steel
Surface.And the clinker for floating over the surface of molten steel plays the protective effect to molten steel, prevent N2, O2 and H2 in furnace gas and air to
Molten steel transmission.The compounding use of aluminium nitride and tungsten carbide, increase decarburization and the desulphurizing ability of clinker.
The present invention is further arranged to：The heat treatment is annealing.
By using above-mentioned technical proposal, after temperature control controlled rolling, steel cooling is very fast, either recovery and recrystallization it is slower or
The rolling of hot rolling is bigger, cause after hot rolling ambient temperature mechanical properties (even metallographic structure) of the steel along rolling direction with it is vertical
In there is larger difference on the direction of rolling, stress be present, it is therefore desirable to made annealing treatment, make steel isotropism, eliminated
Stress.
The present invention is further arranged to：The bottom of the body of heater of the electric arc furnaces, AOD furnace and LF stoves is provided with the first ventilation
Rifle, the second ventilation rifle, the electric arc furnaces, AOD furnace and LF are provided with the top of the body of heater of the electric arc furnaces, AOD furnace and LF stoves
The sidepiece of the body of heater of stove is provided with threeway air gun.
By using above-mentioned technical proposal, electric arc is realized in the setting of the first ventilation rifle, the second ventilation rifle and threeway air gun
Oxygen and inert gas is passed through in stove, AOD furnace and LF stoves.
The present invention is further arranged to：The first ventilation rifle is passed through inert gas, the second ventilation rifle and threeway
Air gun is passed through oxygen.
By using above-mentioned technical proposal, the first ventilation rifle position is passed through in bottom, inert gas from bottom, is played to molten steel
The effect fully stirred, enhancing molten steel and oxygen and the mixed effect of slag former.Threeway air gun is located at sidepiece, primarily serves
Oxygen supply acts on.Second ventilation rifle position plays a part of supplemental oxygen, the work for improve oxygen supply intensity, shortening the heat in top
With.
The present invention is further arranged to：The inert gas is argon gas.
By using above-mentioned technical proposal, argon gas can reduce production cost, enhancing molten steel stirs as conventional inert gas
Dynamic effect, while molten steel performance will not be impacted.
The present invention is further arranged to：The first ventilation rifle is arranged on the bottom of the body of heater of electric arc furnaces, AOD furnace and LF stoves
At center, the muzzle of the first ventilation rifle is vertically oriented to the top of body of heater, the second ventilation rifle electric arc furnaces, AOD furnace and
More are provided with the top of the body of heater of LF stoves, the more second ventilation rifle positions are in the edge at the top of body of heater, every institute
The second ventilation rifle is stated to tilt towards the bottom of body of heater and perpendicular to the rotation direction of molten steel.
By using above-mentioned technical proposal, inert gas drives nearer with inert gas from bottom to top movements
Molten steel part from bottom to top movements.And the second ventilation rifle is from top towards bottom ventilation, so as to drive and the second ventilation rifle
The molten steel part that the oxygen of release is nearer is moved from top to bottom, so that molten steel forms circulation.Because argon gas is from bottom
Center at spray, and second ventilation rifle from the edge at top towards bottom discharge oxygen and second ventilation rifle be provided with more,
So that molten steel forms multiple circulation, strengthen oxygen and the mixability of slag former and molten steel.
The present invention is further arranged to：Circumferentially shape is distributed the more second ventilation rifles, the more second ventilation rifles
Become larger from the circle diameter that the circumference that gun breech surrounds surrounds to pipette tips.
By using above-mentioned technical proposal, if the circle diameter that the second ventilation rifle surrounds from the circumference that gun breech surrounds to pipette tips
Taper into, then on the one hand the active force that the oxygen of the second ventilation rifle release is played to molten steel makes molten steel be transported from top toward bottom
It is dynamic, on the other hand make the molten steel at top from edge toward intermediary movements.And make active force and steel of the molten steel from edge toward intermediary movements
The direction conflict of pendular ring stream, can play a part of necessarily limiting circulation on the contrary.
The present invention is further arranged to：The threeway air gun is respectively set in electric arc furnaces, AOD furnace and the relative both sides of LF stoves
One, the direction of relative two threeway air guns is on the contrary, two relative threeway air guns are alternately ventilated.
By using above-mentioned technical proposal, molten steel being capable of horizontal direction generation turn in the case where threeway air gun leads to oxygen effect
It is dynamic.Assuming that two relative threeway air guns are named as into A rifles and B rifles, in terms of overlook direction, molten steel occurs under the effect of A rifles
Rotate clockwise, rotated counterclockwise under the effect of B rifles.Then when A rifles stop ventilating, molten steel can still occur due to inertia
Rotate clockwise, now B rifles are ventilated, and tissue molten steel rotates clockwise, and gradually takes place and rotate counterclockwise.And in steel
In the handoff procedure of liquid rotation direction, strong turbulent flow occurs for molten steel, and now the mixability of oxygen and slag former and molten steel is bright
Aobvious increase, promote the decarbonization, desulfuration of molten steel.
The present invention also has a goal of the invention to be that providing a kind of above-mentioned high-intensity corrosion steel is preparing sucker rod, oil pipe, taking out
Application in oil pump, oil well set.
By using above-mentioned technical proposal, the sucker rod prepared using above-mentioned high-intensity corrosion steel, oil pipe, oil well pump, oil
Well set not only has excellent structural strength, also with excellent antiseptic property, can strengthen in the so severe ring of coastal oil well
Fitness in border.
In summary, the invention has the advantages that：
1st, the present invention uses the compounding use of aluminium nitride and tungsten carbide, increases decarburization and the desulphurizing ability of clinker；
2nd, design processing temperature scope of the invention is very wide, easily carries out hot-working, so processing cost is relatively low, product
Valency is than high；
3rd, the second ventilation rifle and threeway air gun that the present invention is set, on the one hand strengthens oxygen delivery capacity, on the other hand plays
Promote molten steel that turbulent flow occurs, strengthen oxygen and slag former and molten steel mixability, strengthen decarbonization, desulfuration effect.
Brief description of the drawings
Fig. 1 is the forward sight structural representation of electric arc furnaces, AOD furnace and LF stoves；
Fig. 2 is Fig. 1 top view.
Reference：1st, body of heater；2nd, the first ventilation rifle；3rd, the second ventilation rifle；4th, threeway air gun；5th, electrode；6th, argon gas；
7th, oxygen.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art
Member can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but as long as at this
All protected in the right of invention by Patent Law.
Embodiment 1-5 is the preparation embodiment of slag former.
Embodiment 1
Step1：According to parts by weight, 65 parts of lime, 10 parts of sodium oxide molybdena, 1 part of ferrous oxide, 0.4 part of manganese dioxide, two are weighed
5 parts of titanium oxide, 5 parts of magnesia, 1.5 parts of aluminium nitride, 0.6 part of tungsten carbide, add in muller puddle mixer and grind and mix
Even, the granularity of obtained mixture is in 0.9mm；
Step2：Add mixture in symmetrical ball press, under conditions of the pressure of symmetrical ball press is 15MPa, squeeze
A diameter of 15mm pelletizing is extruded, pelletizing is spontaneously dried into 48h, and 0.5h is calcined under conditions of being 300 DEG C in temperature, obtains ball
Group's shape slag former.The water content of the slag former is 4%wt.
Embodiment 2
Step1：According to parts by weight, weigh 69 parts of lime, 5 parts of sodium oxide molybdena, 0.5 part of ferrous oxide, 0.3 part of manganese dioxide,
8 parts of titanium dioxide, 2.5 parts of magnesia, 1.3 parts of aluminium nitride, 1.4 parts of tungsten carbide, add in muller puddle mixer to grind and mix and stir
Mix uniformly, the granularity of obtained mixture is in 0.8mm；
Step2：Add mixture in symmetrical ball press, under conditions of the pressure of symmetrical ball press is 15MPa, squeeze
A diameter of 15mm pelletizing is extruded, pelletizing is spontaneously dried into 48h, and 0.5h is calcined under conditions of being 300 DEG C in temperature, obtains ball
Group's shape slag former.The water content of the slag former is 5%wt.
Embodiment 3
Step1：According to parts by weight, weigh 73 parts of lime, 6 parts of sodium oxide molybdena, 0.3 part of ferrous oxide, 0.8 part of manganese dioxide,
12 parts of titanium dioxide, 2 parts of magnesia, 1 part of aluminium nitride, 1.2 parts of tungsten carbide, add in muller puddle mixer and grind and mix
Even, the granularity of obtained mixture is in 0.9mm；
Step2：Add mixture in symmetrical ball press, under conditions of the pressure of symmetrical ball press is 15MPa, squeeze
A diameter of 15mm pelletizing is extruded, pelletizing is spontaneously dried into 48h, and 0.5h is calcined under conditions of being 300 DEG C in temperature, obtains ball
Group's shape slag former.The water content of the slag former is 3%wt.
Embodiment 4
Step1：According to parts by weight, weigh 77 parts of lime, 7 parts of sodium oxide molybdena, 0.7 part of ferrous oxide, 0.6 part of manganese dioxide,
15 parts of titanium dioxide, 1.5 parts of magnesia, 0.9 part of aluminium nitride, 1 part of tungsten carbide, add in muller puddle mixer and grind and mix
Uniformly, the granularity of the mixture obtained is in 0.7mm；
Step2：Add mixture in symmetrical ball press, under conditions of the pressure of symmetrical ball press is 15MPa, squeeze
A diameter of 15mm pelletizing is extruded, pelletizing is spontaneously dried into 48h, and 0.5h is calcined under conditions of being 300 DEG C in temperature, obtains ball
Group's shape slag former.The water content of the slag former is 4%wt.
Embodiment 5
Step1：According to parts by weight, weigh 80 parts of lime, 8 parts of sodium oxide molybdena, 0.9 part of ferrous oxide, 0.5 part of manganese dioxide,
10 parts of titanium dioxide, 1 part of magnesia, 1.2 parts of aluminium nitride, 0.8 part of tungsten carbide, add in muller puddle mixer and grind and mix
Uniformly, the granularity of the mixture obtained is in 0.8mm；
Step2：Add mixture in symmetrical ball press, under conditions of the pressure of symmetrical ball press is 15MPa, squeeze
A diameter of 15mm pelletizing is extruded, pelletizing is spontaneously dried into 48h, and 0.5h is calcined under conditions of being 300 DEG C in temperature, obtains ball
Group's shape slag former.The water content of the slag former is 5%wt.
Embodiment 6-10 is the preparation embodiment of high-intensity corrosion steel.Hot processing temperature in embodiment 6-10 is 115-
850℃。
Embodiment 6
A kind of preparation method of high-intensity corrosion steel, comprises the following steps：
Step 1：Feed charge material into and melting is carried out in electric arc furnaces；
Step 2：Refined into AOD furnace；
Step 3：Refined into LF stoves；
Step 4：Continuous casting and rolling；
Step 5：Temperature control controlled rolling；
Step 6：Annealing；
Step 7：Machining；
Furnace charge includes the pig iron and alloy.Pig iron component (mass fraction)：3.3789% carbon, 0.0532% silicon,
0.4340% manganese, 0.0965% phosphorus, 0.0193% sulphur, 0.0065% aluminium, 0.0109% zinc, 0.0326%
Tungsten, 0.0326% cobalt, 0.0434% tin, 0.0217% lead, 95.8583% iron.Alloy compositions (it is total to account for pig iron component
The percentage of quality)：10.31% chromium, 0.43% nickel, 0.22% molybdenum, 0.71% copper, 0.16% titanium, 0.01%
Vanadium, 0.13% niobium.
Compare slag former according to weight：Furnace charge=5kg/t is added in electric arc furnaces, AOD furnace and LF stoves and made according to embodiment 1
Standby slag former.
The component of steel：0.019% carbon, 0.049% silicon, 0.4% manganese, 0.015% phosphorus, 0.01% sulphur,
9.5% chromium, 0.4% nickel, 0.2% molybdenum, 0.65% copper, 0.006% aluminium, 0.15% titanium, 0.01% vanadium,
0.12% niobium, 0.01% zinc, 0.03% tungsten, 0.03% cobalt, 0.04% tin, 0.02% lead, 88.341%
Iron.
Embodiment 7
A kind of preparation method of high-intensity corrosion steel, comprises the following steps：
Step 1：Feed charge material into and melting is carried out in electric arc furnaces；
Step 2：Refined into AOD furnace；
Step 3：Refined into LF stoves；
Step 4：Continuous casting and rolling；
Step 5：Temperature control controlled rolling；
Step 6：Annealing；
Step 7：Machining；
Furnace charge includes the pig iron and alloy.Pig iron component (mass fraction)：3.3776% carbon, 0.0325% silicon,
0.4880% manganese, 0.0965% phosphorus, 0.0193% sulphur, 0.0065% aluminium, 0.0217% zinc, 0.0108%
Tungsten, 0.0217% cobalt, 0.0325% tin, 0.0108% lead, 95.8491% iron.Alloy compositions (it is total to account for pig iron component
The percentage of quality)：10.52% chromium, 0.38% nickel, 0.25% molybdenum, 0.54% copper, 0.14% titanium, 0.02%
Vanadium, 0.10% niobium.
Compare slag former according to weight：Furnace charge=5kg/t is added in electric arc furnaces, AOD furnace and LF stoves and made according to embodiment 2
Standby slag former.
The component of steel：0.01% carbon, 0.03% silicon, 0.45% manganese, 0.008% phosphorus, 0.008% sulphur,
9.7% chromium, 0.35% nickel, 0.23% molybdenum, 0.5% copper, 0.006% aluminium, 0.13% titanium, 0.02% vanadium,
0.09% niobium, 0.02% zinc, 0.01% tungsten, 0.02% cobalt, 0.03% tin, 0.01% lead, 88.378%
Iron.
Embodiment 8
A kind of preparation method of high-intensity corrosion steel, comprises the following steps：
Step 1：Feed charge material into and melting is carried out in electric arc furnaces；
Step 2：Refined into AOD furnace；
Step 3：Refined into LF stoves；
Step 4：Continuous casting and rolling；
Step 5：Temperature control controlled rolling；
Step 6：Annealing；
Step 7：Machining；
Furnace charge includes the pig iron and alloy.Pig iron component (mass fraction)：3.3775% carbon, 0.0218% silicon,
0.5438% manganese, 0.0965% phosphorus, 0.0193% sulphur, 0.0054% aluminium, 0.0109% zinc, 0.0544%
Tungsten, 0.0272% cobalt, 0.0218% tin, 0.0131% lead, 95.7738% iron.Alloy compositions (it is total to account for pig iron component
The percentage of quality)：10.88% chromium, 0.49% nickel, 0.29% molybdenum, 0.38% copper, 0.13% titanium, 0.03%
Vanadium, 0.07% niobium.
Compare slag former according to weight：Furnace charge=5kg/t is added in electric arc furnaces, AOD furnace and LF stoves and made according to embodiment 3
Standby slag former.
The component of steel：0.015% carbon, 0.02% silicon, 0.5% manganese, 0.004% phosphorus, 0.006% sulphur,
10.0% chromium, 0.45% nickel, 0.27% molybdenum, 0.35% copper, 0.005% aluminium, 0.12% titanium, 0.03%
Vanadium, 0.06% niobium, 0.01% zinc, 0.05% tungsten, 0.025% cobalt, 0.02% tin, 0.012% lead,
88.053% iron.
Embodiment 9
A kind of preparation method of high-intensity corrosion steel, comprises the following steps：
Step 1：Feed charge material into and melting is carried out in electric arc furnaces；
Step 2：Refined into AOD furnace；
Step 3：Refined into LF stoves；
Step 4：Continuous casting and rolling；
Step 5：Temperature control controlled rolling；
Step 6：Annealing；
Step 7：Machining；
Furnace charge includes the pig iron and alloy.Pig iron component (mass fraction)：3.3762% carbon, 0.0109% silicon,
0.599% manganese, 0.0965% phosphorus, 0.0193% sulphur, 0.0065% aluminium, 0.0218% zinc, 0.0762% tungsten,
0.0163% cobalt, 0.0109% tin, 0.0152% lead, 95.6962% iron.Alloy compositions (account for the total matter of pig iron component
The percentage of amount)：11.11% chromium, 0.54% nickel, 0.34% molybdenum, 0.22% copper, 0.15% titanium, 0.04%
Vanadium, 0.03% niobium.
Compare slag former according to weight：Furnace charge=5kg/t is added in electric arc furnaces, AOD furnace and LF stoves and made according to embodiment 4
Standby slag former.
The component of steel：0.005% carbon, 0.01% silicon, 0.55% manganese, 0.001% phosphorus, 0.004% sulphur,
10.2% chromium, 0.5% nickel, 0.31% molybdenum, 0.2% copper, 0.006% aluminium, 0.14% titanium, 0.04% vanadium,
0.03% niobium, 0.02% zinc, 0.07% tungsten, 0.015% cobalt, 0.01% tin, 0.014% lead, 87.875%
Iron.
Embodiment 10
A kind of preparation method of high-intensity corrosion steel, comprises the following steps：
Step 1：Feed charge material into and melting is carried out in electric arc furnaces；
Step 2：Refined into AOD furnace；
Step 3：Refined into LF stoves；
Step 4：Continuous casting and rolling；
Step 5：Temperature control controlled rolling；
Step 6：Annealing；
Step 7：Machining；
Furnace charge includes the pig iron and alloy.Pig iron component (mass fraction)：3.378% carbon, 0.0436% silicon,
0.654% manganese, 0.0965% phosphorus, 0.0193% sulphur, 0.0076% aluminium, 0.0109% zinc, 0.0654% tungsten,
0.0109% cobalt, 0.0327% tin, 0.0174% lead, 95.6512% iron.Alloy compositions (account for the total matter of pig iron component
The percentage of amount)：11.44% chromium, 0.44% nickel, 0.38% molybdenum, 0.05% copper, 0.12% titanium, 0.03%
Vanadium, 0.01% niobium.
Compare slag former according to weight：Furnace charge=5kg/t is added in electric arc furnaces, AOD furnace and LF stoves and made according to embodiment 4
Standby slag former.
The component of steel：0.005% carbon, 0.04% silicon, 0.6% manganese, 0.012% phosphorus, 0.002% sulphur,
10.5% chromium, 0.4% nickel, 0.35% molybdenum, 0.05% copper, 0.007% aluminium, 0.11% titanium, 0.03% vanadium,
0.01% niobium, 0.01% zinc, 0.06% tungsten, 0.01% cobalt, 0.03% tin, 0.016% lead, 87.758%
Iron.
With reference to Fig. 1 and 2, in embodiment 6-10, it is respectively provided with the bottom centre of the body of heater 1 of electric arc furnaces, AOD furnace and LF stoves
There is the first ventilation rifle 2 for leading to argon gas 6.The muzzle of first ventilation rifle 2 is vertically oriented to the top of body of heater 1.Electric arc furnaces, AOD furnace
Be provided with the top edge of the body of heater 1 of LF stoves for leading to more second of oxygen 7 ventilation rifles 3.Second ventilation rifle 3 tilts
Towards the bottom of body of heater 1 and perpendicular to the rotation direction of molten steel.Circumferentially shape is distributed more second ventilation rifles 3.More second logical
Air gun 3 becomes larger from the circle diameter that the circumference that gun breech surrounds surrounds to pipette tips.
Inert gas sprays at the center of the bottom of body of heater 1, from the bottom of body of heater 1 to the top movements of body of heater 1, drives
The molten steel part nearer with inert gas is from the bottom of body of heater 1 to the top movements of body of heater 1.Second ventilation rifle 3 is from body of heater 1
The edge at top discharge oxygen 7 towards the bottom of body of heater 1 and the second ventilation rifle 3 is provided with more, more second ventilation rifles 3 from
The circle diameter that the circumference that gun breech surrounds to pipette tips surround becomes larger, then the oxygen 7 that the second ventilation rifle 3 discharges rises to molten steel
To active force on the one hand make molten steel from the top of body of heater 1 toward the bottom of body of heater 1 move, on the other hand make the top of body of heater 1
Molten steel is from middle toward border movement.Molten steel is logical from the top of body of heater 1 to the active force of the bottom of body of heater 1, second in inert gas
Air gun 3 discharge from centre toward the component at edge and from the top of body of heater 1 to the collective effect of the component of the bottom of body of heater 1 under,
Multiple circulation are formed, strengthen oxygen 7 and the mixability of slag former and molten steel.
With reference to Fig. 1 and 2, electric arc furnaces, AOD furnace and the relative both sides of LF stoves respectively set a threeway for being used to lead to oxygen 7
Air gun 4, the direction of relative two threeway air guns 4 are opposite.When in use, two threeway air guns 4 alternately lead to oxygen 7.
Assuming that two relative threeway air guns 4 are named as into A rifles and B rifles, in terms of overlook direction, molten steel acts in A rifles
It is lower to rotate clockwise, rotated counterclockwise under the effect of B rifles.Then when A rifles stop ventilate when, molten steel due to inertia still
It can rotate clockwise, now B rifles are ventilated, and tissue molten steel rotates clockwise, and gradually takes place and rotate counterclockwise.
And in the handoff procedure of molten steel rotation direction, the mixing of strong turbulent flow, now oxygen 7 and slag former and molten steel occurs for molten steel
Degree significantly increases, and promotes the decarbonization, desulfuration of molten steel.
By the high-intensity corrosion steel prepared according to embodiment 6-10 by existing production technology make sucker rod, oil pipe,
The equipment that oil well pump, oil well set etc. need to use in coastal oil well.
In tests below, using the high-intensity corrosion steel that are prepared according to embodiment 6-10 as material, with reference to existing production
The sucker rod of technique manufacture is as subjects.
Erichsen test
According to SY/T 5029-2006《Sucker rod》Petroleum industry standard and GB/T 229-2002《Metal material room temperature is drawn
Stretch test method》National standard, tensile strength, yield strength, elongation, section shrinkage are carried out to the sucker rod that the present invention obtains
Rate is tested.
The Erichsen test record sheet of table 1
As known from Table 1, the present invention has good tensile property, and the wherein tensile property of embodiment 8 is implemented better than other
Example.
Autoclave corrosion test
High-temperature high-pressure anti-corrosive performance test is carried out to sucker rod using high-temperature high-pressure reaction kettle.
(1) test(ing) medium
According to pungent 106 × 119 water sample salinity (the being shown in Table 2) configuration in Dong Xin oil recovery factories, total salinity reaches 137739mg/L.
The water sample salinity of table 2
(2) experimental condition
1. the temperature tested, time
Temperature：110℃.
Time：240h.
2. the size of sample, quantity.
Size：Endoporus Φ 10.5mm, external diameter Φ 16mm, height h=20mm.
Quantity：The sucker rod 3 that each embodiment material makes, results averaged.
3. test pressure 20MPa, CO2(carbon dioxide) partial pressure 2.0MPa；
4. flow velocity：1.0m/s (simulation downhole fluid flowing velocity)
(3) evaluation method
Antiseptic property is characterized using weight-loss method and surface corrosion phenomenon analysis method.
The high-temperature high-pressure anti-corrosive performance test record sheet of table 3
As known from Table 3, the present invention has good antiseptic property, and the wherein antiseptic property of embodiment 8 is implemented better than other
Example.
Comparative example 1
Using 20CrMo as material, the sucker rod as a comparison case 1 that is manufactured with reference to existing production technology.
Comparative example 2
Aluminium nitride is removed as different from Example 8, and other are same as Example 8.
Comparative example 3
Tungsten carbide is removed as different from Example 8, and other are same as Example 8.
Comparative example 4
Aluminium nitride and tungsten carbide are removed simultaneously as different from Example 8, other are same as Example 8.
Embodiment 7 and comparative example 1-4 are carried out with reference to the step of Erichsen test, fatigue test and autoclave corrosion test
Test.
The embodiment 8 of table 4 and comparative example 1-4 Erichsen test record sheets
The embodiment 8 of table 5 and comparative example 1-4 high-temperature high-pressure anti-corrosive performance test record sheets
It can be drawn from table 4 and 5 to draw a conclusion：
Comparative example 8 and comparative example 1 understand that the present invention is superior to comparative example 1 on tensile property and antiseptic property.Can
See, compared to prior art, the present invention, can also with excellent antiseptic property with not only with excellent structural strength
Strengthen the fitness in the such adverse circumstances of coastal oil well.
Comparative example 8 and comparative example 2-4 understand, the strength degree of embodiment 8, yield limit, elongation, section shrinkage
This five indexs of rate, homogeneous corrosion rate are superior to comparative example 2 and 3, and the strength degree of comparative example 4, yield limit, elongation,
This five indexs of the contraction percentage of area, homogeneous corrosion rate are inferior to comparative example 2 and 3.It can be seen that aluminium nitride and tungsten carbide can be to intensity
The performance boost of the limit, yield limit, elongation, the contraction percentage of area, homogeneous corrosion rate this five indexs acts.But
Aluminium nitride and tungsten carbide compounding use are to strength degree, yield limit, elongation, the contraction percentage of area, homogeneous corrosion rate this five
The lifting effect of index is greater than aluminium nitride and tungsten carbide and is each used alone to strength degree, yield limit, elongation, section
The lifting effect sum of this five indexs of shrinkage factor, homogeneous corrosion rate.Therefore, aluminium nitride and tungsten carbide can also produce in the present invention
Raw complex role, increase decarburization and the desulphurizing ability of clinker, so as to further enhance the performance of the present invention.
Claims (9)
1. a kind of high-intensity corrosion steel, it is characterized in that：Include the component of following percentage by weight：<0.02% carbon,<0.5%
Silicon, 0.4-0.6% manganese ,≤0.015% phosphorus ,≤0.01% sulphur, 9.5-10.5% chromium, 0.35-0.5% nickel, 0.2-
0.35% molybdenum ,≤0.65% copper ,≤0.007% aluminium ,≤0.15% titanium ,≤0.04% vanadium ,≤0.12% niobium ,≤
0.02% zinc ,≤0.07% tungsten ,≤0.03% cobalt ,≤0.04% tin ,≤0.02% lead, surplus is iron；
Its preparation method includes following preparation process：
Step 1：Feed charge material into and melting is carried out in electric arc furnaces；
Step 2：Refined into AOD furnace；
Step 3：Refined into LF stoves；
Step 4：Continuous casting and rolling；
Step 5：Temperature control controlled rolling；
Step 6：Heat treatment；
Step 7：Machining；
Slag former is added in the electric arc furnaces, AOD furnace and LF stoves, the slag former is made up of the component of following parts by weight：
Lime 65-80 parts
Sodium oxide molybdena 5-10 parts
Ferrous oxide 0.3-1 parts
Manganese dioxide 0.3-0.8 parts
Titanium dioxide 5-15 parts
Magnesia 1-3 parts
Aluminium nitride 0.9-1.5 parts
Tungsten carbide 0.6-1.4 parts.
2. high-intensity corrosion steel according to claim 1, it is characterized in that：The heat treatment is annealing.
3. high-intensity corrosion steel according to claim 1, it is characterized in that：The body of heater of the electric arc furnaces, AOD furnace and LF stoves
(1) bottom is provided with the first ventilation rifle (2), is provided with the top of the body of heater (1) of the electric arc furnaces, AOD furnace and LF stoves
Second ventilation rifle (3), the sidepiece of the body of heater (1) of the electric arc furnaces, AOD furnace and LF stoves are provided with threeway air gun (4).
4. high-intensity corrosion steel according to claim 3, it is characterized in that：The first ventilation rifle (2) is passed through inert gas,
The second ventilation rifle (3) and threeway air gun (4) are passed through oxygen (7).
5. high-intensity corrosion steel according to claim 4, it is characterized in that：The inert gas is argon gas (6).
6. high-intensity corrosion steel according to claim 4, it is characterized in that：It is described first ventilation rifle (2) be arranged on electric arc furnaces,
At the bottom centre of the body of heater of AOD furnace and LF stoves (1), the muzzle of the first ventilation rifle (2) is vertically oriented to the top of body of heater (1)
Portion, the second ventilation rifle (3) are provided with more, described in more at the top of the body of heater (1) of electric arc furnaces, AOD furnace and LF stoves
Second ventilation rifle (3) is located at the edge at the top of body of heater (1), and the every second ventilation rifle (3) is tilted towards body of heater (1)
Bottom and perpendicular to the rotation direction of molten steel.
7. high-intensity corrosion steel according to claim 6, it is characterized in that：More described second rifles (3) circumferentially shapes of ventilating
Distribution, the more second ventilation rifles (3) become larger from the circle diameter that the circumference that gun breech surrounds surrounds to pipette tips.
8. high-intensity corrosion steel according to claim 4, it is characterized in that：The threeway air gun (4) is in electric arc furnaces, AOD
Stove and the relative both sides of LF stoves respectively set one, and the directions of relative two threeway air guns (4) is on the contrary, relative two
The threeway air gun (4) is alternately ventilated.
9. application of the high-intensity corrosion steel as claimed in claim 1 in sucker rod, oil pipe, oil well pump, oil well set is prepared.
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| CN107099756B (en) * | 2017-05-10 | 2018-09-21 | 西宁特殊钢股份有限公司 | A kind of high-strength corrosion-resisting steel for sucker rod and its production method |
| CN108251599A (en) * | 2018-02-09 | 2018-07-06 | 天津荣程联合钢铁集团有限公司 | The preparation method of abrading-ball Steel material slag former and abrading-ball Steel material |
| CN109487175B (en) * | 2018-11-22 | 2020-01-10 | 浙江睿智钢业有限公司 | High-strength corrosion-resistant sucker rod and preparation process thereof |
| CN111961984A (en) * | 2019-05-20 | 2020-11-20 | 海安县鹰球粉末冶金有限公司 | Powder metallurgy oil-retaining bearing formula |
| CN111531158B (en) * | 2020-06-16 | 2021-08-13 | 江苏兴湖耐火材料有限公司 | Manufacturing method of high-strength scouring-resistant stopper rod for continuous casting |
| WO2023157897A1 (en) * | 2022-02-17 | 2023-08-24 | 日本製鉄株式会社 | Steel material suitable for use in sour environments |
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Effective date of registration: 20180904 Address after: 325000 the 2 layer of 1 buildings, 318 East Yan Road, Wenzhou economic and Technological Development Zone, Zhejiang. Patentee after: Zhejiang Ruizhi Steel Industry Co., Ltd. Address before: 200120 Pudong New Area, Shanghai, China (Shanghai) free trade trial area 2283, 1077 2, Zu Chong Road. Patentee before: Wisdom Steel Company Limited |