CN106399862A - High-strength anti-corrosive steel product and preparation method therefor and application thereof - Google Patents
High-strength anti-corrosive steel product and preparation method therefor and application thereof Download PDFInfo
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- CN106399862A CN106399862A CN201610858990.1A CN201610858990A CN106399862A CN 106399862 A CN106399862 A CN 106399862A CN 201610858990 A CN201610858990 A CN 201610858990A CN 106399862 A CN106399862 A CN 106399862A
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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
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/54—Processes yielding slags of special composition
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- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
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- 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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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
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- 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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- 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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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
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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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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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
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
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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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a high-strength anti-corrosive steel product. The high-strength anti-corrosive steel product comprises the following components in percentages by weight: less than 0.02% of carbon, less than 0.5% of silicon, 0.4-0.6% of manganese, less than or equal to 0.015% of phosphorus, less than or equal to 0.01% of sulfur, 9.5-10.5% of chromium, 0.35-0.5% of nickel, 0.2-0.35% of molybdenum, less than or equal to 0.65% of copper, less than or equal to 0.007% of aluminum, less than or equal to 0.15% of titanium, less than or equal to 0.04% of vanadium, less than or equal to 0.12% of niobium, less than or equal to 0.02% of zinc, less than or equal to 0.07% of tungsten, less than or equal to 0.03% of cobalt, less than or equal to 0.04% of tin, less than or equal to 0.02% of lead and the balance of ferrum. The high-strength anti-corrosive steel product disclosed by the invention has the beneficial effects that the content of carbon and sulfur is reduced, the steel tissues are refined, and the molecular structural density of the steel is improved to achieve corrosion resistance and mechanical property; as the tissues of the steel are full, the diffusing speed of steel atoms is increased, chromium in the crystals and in the crystal boundary in a metallographic structure is easy to balance, thereby playing a role of preventing crystal boundary corrosion. Meanwhile, spot corrosion is replaced by uniform tiny corrosion on an integral plane, so that the corrosion rate is delayed; alloys such as molybdenum, nickel and copper alloys are added to form an intermetallic compound, so that the matrix structure is strengthened; crystalline grains can be refined by adding niobium, vanadium and titanium, so that the toughness of a material is further improved.
Description
Technical field
The present invention relates to steel field, particularly to a kind of high-intensity corrosion steel and its preparation method and application.
Background technology
The oil well of the crude oil containing H2S, natural gas etc. and gas well (below, oil well and gas well being generically and collectively referred to as " oil well ") have
, because of the problem of SSC (hereinafter referred to as " SSC "), therefore anti-SSC is excellent for steel under moistening hydrogen-sulfide environmental
Oil well pipe becomes required.
Anti- SSC sexual partner sharp declines with the intensity rising of steel.Therefore, in the past, under general appreciation condition i.e.
Be able to ensure that anti-SSC in the environment of the NACE solution A (NACETM0177-2005) comprising 1barH2S is only
110ksi level (yield strength：758～862MPa) steel.And, as a rule, the 125ksi level of higher intensity (is bent
Take intensity：862～965MPa), 140ksi level (yield strength：965～1069MPa) steel also can only divide in limited H2S
Pressure (for example, below 0.1bar) can guarantee anti-SSC.In view of the corrosive environment being brought due to the high depth of oil well
Harshization is more severe from now on, and the exploitation therefore with the pipe for oil well use steel of higher intensity and high corrosion-resistant is necessary.
SSC is because the hydrogen that steel surface produces spreads and the stress with steel institute load in steel in corrosive environment
Synergy and lead to rupture hydrogen embrittlement one kind.The high steel of the sensitivity of SSC are compared with the yield strength of steel
Easily crack under low bearing strength test.
20CrMo is a kind of classical structural alloy steel, due to containing a certain amount of Cr and Mo in its component, thus has
Good comprehensive mechanical performance.The tensile strength of 20CrMo 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 compatibility
Feature, substantially do not possess corrosion resistance, thus can only conduct in the common vehicle of no requirement for anticorrosion, the parts of lathe
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 in the adverse circumstances of ionic liquid, have much room for improvement.
Content of the invention
It is an object of the invention to provide a kind of high-intensity corrosion steel.It is strong that this high-intensity corrosion steel not only has excellent structure
Degree, also has excellent antiseptic property.
The above-mentioned technical purpose of the present invention technical scheme is that：
A kind of high-intensity corrosion steel, including the component of following percentage by weight：The carbon of ＜ 0.02%, the silicon of ＜ 0.5%, 0.4-
0.6% manganese ,≤0.015% phosphorus ,≤0.01% sulfur, the chromium of 9.5-10.5%, the nickel of 0.35-0.5%, 0.2-0.35%
Molybdenum ,≤0.65% copper ,≤0.007% aluminum ,≤0.15% titanium ,≤0.04% vanadium ,≤0.12% niobium ,≤
0.02% zinc ,≤0.07% tungsten ,≤0.03% cobalt ,≤0.04% stannum ,≤0.02% lead, balance of ferrum.
By adopting technique scheme, the percentage by weight of carbon is less than 0.03%, adds chromium, obtain low-carbon martensite
Tissue, improves corrosion resistance, strengthens toughness.The content of chromium, in 9.5-10.5%, is conducive to the formation of passivating film, strengthens corrosion-resistant
Property.The addition of the alloys such as molybdenum, nickel and copper, forms intermetallic compound, strengthens matrix.The addition of niobium, vanadium and titanium can be thin
Change crystal grain, improve the toughness of material further.
Reduce the carbon of material 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 in metallographic structure, transgranular and crystal boundary chromium is easy
Reach balance, thus playing the effect preventing grain boundary corrosion.Meanwhile, spot corrosion is replaced with the uniform minimal corrosion of integral planar,
Delay corrosion rate.Additionally, the anti-H 2 S resistant to carbon dioxide stress corrosion ability of material is strong.Wherein, the titanium dioxide that can bear
, up to 3.0Mpa, hydrogen sulfide sectional pressure is up to 0.15MPa for carbon partial pressure.
Another goal of the invention of the present invention is to provide a kind of preparation method of high-intensity corrosion steel, including following preparation step
Suddenly：
Step 1：Feed charge material into and in electric arc furnace, carry out melting；
Step 2：Enter AOD furnace and carry out refine；
Step 3：Enter LF stove and carry out refine；
Step 4：Continuous casting and rolling；
Step 5：Temperature control controlled rolling；
Step 6：Heat treatment；
Step 7：Machining；
Slag former is all added, described slag former includes the component of following parts by weight in described electric arc furnace, AOD furnace and LF stove：
Calx 65-80 part
Sodium oxide 5-10 part
Ferrous oxide 0.3-1 part
Manganese dioxide 0.3-0.8 part
Titanium dioxide 5-15 part
Magnesium oxide 1-3 part
Aluminium nitride 0.9-1.5 part
Tungsten carbide 0.6-1.4 part.
By adopting technique scheme, furnace charge includes the pig iron and alloy.Wherein, pig iron component (mass fraction)：
The carbon of 3.376-3.379% ,≤0.054% silicon, the manganese of 0.043-0.066%, 0.0965% phosphorus, 0.0193% sulfur,
≤ 0.0076% aluminum ,≤0.022% zinc ,≤0.077% tungsten ,≤0.033% cobalt ,≤0.044% stannum ,≤
0.022% lead, the ferrum of 95.65-95.86%.Alloy compositions (mass fraction)：The chromium of 9.5-10.5%, 0.35-0.5%
Nickel, the molybdenum of 0.2-0.35% ,≤0.05% copper ,≤0.15% titanium ,≤0.04% vanadium ,≤0.12% niobium.
Calx and sodium oxide are used for improving the basicity of slag, strengthen the binding ability with sulfur dioxide and carbon dioxide, from
And reduce the partial pressure of sulfur dioxide and carbon dioxide, promote sulfur and carbon to aoxidize generation sulfur dioxide and carbon dioxide further.Oxygen
Change the ferrous viscosity that can reduce slag with manganese dioxide, improve slag empty in Calx to the wetness degree of Calx and raising slag
Penetrating power in gap, reduces the generation of Calx Surface Creation 2CaO SiO2 shell, thus promoting Calx burn-off rate.Dioxy
The addition changing titanium can improve absorbability, reduction carbon and sulfur content for carbon and sulfur.Magnesium oxide is to increase oxidation in slag
Content of magnesium, reduces the erosion to furnace lining for the slag, improves the life-span of furnace lining.The density of slag is less than molten steel, is generally covered in molten steel
Surface.And the slag floating over the surface of molten steel plays the protective effect to molten steel, stop N2, O2 and H2 in furnace gas and air to
Molten steel transmits.Aluminium nitride and the compounding use of tungsten carbide, increase decarburization and the desulphurizing ability of slag.
The present invention is further arranged to：Described heat treatment is annealing.
By adopting technique scheme, after temperature control controlled rolling, steel cooling is very fast, or recovery and recrystallization is slower, or
The rolling ratio of hot rolling is larger, lead to steel after hot rolling along rolling direction ambient temperature mechanical properties (even metallographic structure) with vertical
There is larger difference on the direction of rolling, there is stress it is therefore desirable to be made annealing treatment, make steel isotropism, eliminate
Stress.
The present invention is further arranged to：The bottom of the body of heater of described electric arc furnace, AOD furnace and LF stove is provided with the first ventilation
Rifle, the top of the body of heater of described electric arc furnace, AOD furnace and LF stove is provided with the second ventilation rifle, described electric arc furnace, AOD furnace and LF
The sidepiece of the body of heater of stove is provided with threeway air gun.
By adopting technique scheme, electric arc is realized in the setting of the first ventilation rifle, the second ventilation rifle and threeway air gun
In stove, AOD furnace and LF stove, oxygen and noble gases is passed through.
The present invention is further arranged to：Described first ventilation rifle is passed through noble gases, described second ventilation rifle and threeway
Air gun is all passed through oxygen.
By adopting technique scheme, the first passage is located at bottom, and noble gases are passed through from bottom, play to molten steel
The effect fully stirring, strengthens the mixed effect of molten steel and oxygen and slag former.3rd passage is located at sidepiece, primarily serves
Oxygen supply acts on.Second ventilation rifle position, in top, plays the effect of supplemental oxygen, the work improve oxygen supply intensity, shortening the heat
With.
The present invention is further arranged to：Described noble gases are argon.
By adopting technique scheme, argon, as conventional noble gases, can reduce production cost, strengthen molten steel and stir
Dynamic effect, will not impact to molten steel performance simultaneously.
The present invention is further arranged to：Described first ventilation rifle is arranged on the bottom of the body of heater of electric arc furnace, AOD furnace and LF stove
Center, the muzzle of described first ventilation rifle is vertically oriented to the top of body of heater, described second ventilation rifle electric arc furnace, AOD furnace and
The top of the body of heater of LF stove is provided with many, the edge at the many described second ventilation tops in body of heater for the rifle position, every institute
State the second ventilation rifle and tilt the bottom towards body of heater and the rotation direction perpendicular to molten steel.
By adopting technique scheme, noble gases drive nearer with inert gas from bottom to top movements
Molten steel part from bottom to top movements.And second ventilation rifle from top towards bottom ventilation, thus drive with second ventilation rifle
The molten steel part that the oxygen of release is nearer is moved to bottom from top, so that molten steel forms circulation.Because argon is from bottom
Center spray, and second ventilation the edge from top for the rifle towards bottom discharge oxygen and second ventilation rifle be provided with many,
So that molten steel forms multiple circulation, strengthen the mixability of oxygen and slag former and molten steel.
The present invention is further arranged to：Many described second ventilation rifle circumferentially shape distributions, many described second ventilation rifles
The circle diameter surrounding from circumference to the pipette tips that gun breech surrounds becomes larger.
By adopting technique scheme, if the circle diameter that the second ventilation rifle surrounds from circumference to the pipette tips that gun breech surrounds
Taper into, then the active force one side that the oxygen of the second ventilation rifle release is played to molten steel makes molten steel transport toward bottom from top
Dynamic, on the other hand make the molten steel at top from edge toward intermediary movements.And make molten steel from edge toward the active force of intermediary movements and steel
The direction conflict of pendular ring stream, can play the effect of a definite limitation circulation on the contrary.
The present invention is further arranged to：Described threeway air gun is respectively arranged in electric arc furnace, the AOD furnace both sides relative with LF stove
One, relative replacing towards two contrary, relative described threeway air guns of two described threeway air guns is ventilated.
By adopting technique scheme, molten steel leads in threeway air gun being capable of horizontal direction generation turn under oxygen effect
Dynamic.Assume for two relative threeway air guns to be named as A rifle and B rifle, in terms of overlook direction, molten steel occurs under the effect of A rifle
Rotate clockwise, rotate counterclockwise under the effect of B rifle.Then when A rifle stops ventilation, molten steel still can be occurred due to inertia
Rotate clockwise, now the ventilation of B rifle, tissue molten steel rotates clockwise, and gradually starts to rotate counterclockwise.And in steel
In the handoff procedure of liquid rotation direction, there is strong turbulent flow in molten steel, now oxygen and slag former are bright with the mixability of molten steel
The aobvious decarbonization, desulfuration increasing, promoting molten steel.
The present invention also has a goal of the invention to be to provide a kind of above-mentioned high-intensity corrosion steel preparing sucker rod, oil pipe, taking out
Application in oil pump, oil well set.
By adopting technique scheme, using the sucker rod of above-mentioned high-intensity corrosion steel preparation, oil pipe, oil well pump, oil
Well set not only has excellent structural strength, also has excellent antiseptic property, can strengthen ring so severe in coastal oil well
Fitness in border.
In sum, the invention has the advantages that：
1st, the present invention adopts the compounding use of aluminium nitride and tungsten carbide, increases decarburization and the desulphurizing ability of slag；
2nd, the Design and Machining temperature range of the present invention is very wide, easily carries out hot-working, so processing cost is relatively low, product cost
High；
3rd, the third through-hole that the present invention is arranged at top, on the one hand makes enhancing oxygen delivery capacity, on the other hand plays promotion steel
There is turbulent flow in liquid, strengthen oxygen and slag former and molten steel mixability, strengthens decarbonization, desulfuration effect.
Brief description
Fig. 1 is the forward sight structural representation of electric arc furnace, AOD furnace and LF stove；
Fig. 2 is the top view of Fig. 1.
Reference：1st, body of heater；2nd, the first ventilation rifle；3rd, the second ventilation rifle；4th, threeway air gun；5th, electrode；6th, argon；
7th, oxygen.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
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 to the present embodiment after reading this specification as needed does not have the modification of creative contribution, but as long as at this
All protected by Patent Law in the right of invention.
Embodiment 1-5 is the preparation embodiment of slag former.
Embodiment 1
Step1：According to weight portion, weigh 65 parts of Calx, 10 parts of sodium oxide, 1 part of ferrous oxide, 0.4 part of manganese dioxide, titanium dioxide
5 parts of titanium, 5 parts of magnesium oxide, 1.5 parts of aluminium nitride, 0.6 part of tungsten carbide, add in muller puddle mixer and grind and mixing and stirring, obtain
The granularity of the mixture arriving is in 0.9mm；
Step2：Add mixture in symmetrical ball press, under conditions of the pressure of symmetrical ball press is 15MPa, squeeze out
The pelletizing of a diameter of 15mm, pelletizing is spontaneously dried 48h, and roasting 0.5h under conditions of temperature is 300 DEG C, obtains pelletizing shape
Slag former.The water content of this slag former is 4%wt.
Embodiment 2
Step1：According to weight portion, weigh 69 parts of Calx, 5 parts of sodium oxide, 0.5 part of ferrous oxide, 0.3 part of manganese dioxide, dioxy
Change 8 parts of titanium, 2.5 parts of magnesium oxide, 1.3 parts of aluminium nitride, 1.4 parts of tungsten carbide, grind in addition muller puddle mixer and mix and blend is equal
Even, the granularity of the mixture obtaining is in 0.8mm；
Step2：Add mixture in symmetrical ball press, under conditions of the pressure of symmetrical ball press is 15MPa, squeeze out
The pelletizing of a diameter of 15mm, pelletizing is spontaneously dried 48h, and roasting 0.5h under conditions of temperature is 300 DEG C, obtains pelletizing shape
Slag former.The water content of this slag former is 5%wt.
Embodiment 3
Step1：According to weight portion, weigh 73 parts of Calx, 6 parts of sodium oxide, 0.3 part of ferrous oxide, 0.8 part of manganese dioxide, dioxy
Change 12 parts of titanium, 2 parts of magnesium oxide, 1 part of aluminium nitride, 1.2 parts of tungsten carbide, add in muller puddle mixer and grind and mixing and stirring,
The granularity of the mixture obtaining is in 0.9mm；
Step2：Add mixture in symmetrical ball press, under conditions of the pressure of symmetrical ball press is 15MPa, squeeze out
The pelletizing of a diameter of 15mm, pelletizing is spontaneously dried 48h, and roasting 0.5h under conditions of temperature is 300 DEG C, obtains pelletizing shape
Slag former.The water content of this slag former is 3%wt.
Embodiment 4
Step1：According to weight portion, weigh 77 parts of Calx, 7 parts of sodium oxide, 0.7 part of ferrous oxide, 0.6 part of manganese dioxide, dioxy
Change 15 parts of titanium, 1.5 parts of magnesium oxide, 0.9 part of aluminium nitride, 1 part of tungsten carbide, grind in addition muller puddle mixer and mix and blend is equal
Even, the granularity of the mixture obtaining is in 0.7mm；
Step2：Add mixture in symmetrical ball press, under conditions of the pressure of symmetrical ball press is 15MPa, squeeze out
The pelletizing of a diameter of 15mm, pelletizing is spontaneously dried 48h, and roasting 0.5h under conditions of temperature is 300 DEG C, obtains pelletizing shape
Slag former.The water content of this slag former is 4%wt.
Embodiment 5
Step1：According to weight portion, weigh 80 parts of Calx, 8 parts of sodium oxide, 0.9 part of ferrous oxide, 0.5 part of manganese dioxide, dioxy
Change 10 parts of titanium, 1 part of magnesium oxide, 1.2 parts of aluminium nitride, 0.8 part of tungsten carbide, grind in addition muller puddle mixer and mix and blend is equal
Even, the granularity of the mixture obtaining is in 0.8mm；
Step2：Add mixture in symmetrical ball press, under conditions of the pressure of symmetrical ball press is 15MPa, squeeze out
The pelletizing of a diameter of 15mm, pelletizing is spontaneously dried 48h, and roasting 0.5h under conditions of temperature is 300 DEG C, obtains pelletizing shape
Slag former.The water content of this 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 steps：
Step 1：Feed charge material into and in electric arc furnace, carry out melting；
Step 2：Enter AOD furnace and carry out refine；
Step 3：Enter LF stove and carry out refine；
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% sulfur, 0.0065% aluminum, 0.0109% zinc, 0.0326% tungsten,
0.0326% cobalt, 0.0434% stannum, 0.0217% lead, 95.8583% ferrum.Alloy compositions (the matter with pig iron component
Amount ratio)：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 all adds in electric arc furnace, AOD furnace and LF stove and makes 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% sulfur,
9.5% chromium, 0.4% nickel, 0.2% molybdenum, 0.65% copper, 0.006% aluminum, 0.15% titanium, 0.01% vanadium,
0.12% niobium, 0.01% zinc, 0.03% tungsten, 0.03% cobalt, 0.04% stannum, 0.02% lead, 88.341%
Ferrum.
Embodiment 7
A kind of preparation method of high-intensity corrosion steel, comprises the steps：
Step 1：Feed charge material into and in electric arc furnace, carry out melting；
Step 2：Enter AOD furnace and carry out refine；
Step 3：Enter LF stove and carry out refine；
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% sulfur, 0.0065% aluminum, 0.0217% zinc, 0.0108% tungsten,
0.0217% cobalt, 0.0325% stannum, 0.0108% lead, 95.8491% ferrum.Alloy compositions (the matter with pig iron component
Amount ratio)：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 all adds in electric arc furnace, AOD furnace and LF stove and makes 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% sulfur,
9.7% chromium, 0.35% nickel, 0.23% molybdenum, 0.5% copper, 0.006% aluminum, 0.13% titanium, 0.02% vanadium,
0.09% niobium, 0.02% zinc, 0.01% tungsten, 0.02% cobalt, 0.03% stannum, 0.01% lead, 88.378%
Ferrum.
Embodiment 8
A kind of preparation method of high-intensity corrosion steel, comprises the steps：
Step 1：Feed charge material into and in electric arc furnace, carry out melting；
Step 2：Enter AOD furnace and carry out refine；
Step 3：Enter LF stove and carry out refine；
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% sulfur, 0.0054% aluminum, 0.0109% zinc, 0.0544% tungsten,
0.0272% cobalt, 0.0218% stannum, 0.0131% lead, 95.7738% ferrum.Alloy compositions (the matter with pig iron component
Amount ratio)：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 all adds in electric arc furnace, AOD furnace and LF stove and makes 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% sulfur,
10.0% chromium, 0.45% nickel, 0.27% molybdenum, 0.35% copper, 0.005% aluminum, 0.12% titanium, 0.03%
Vanadium, 0.06% niobium, 0.01% zinc, 0.05% tungsten, 0.025% cobalt, 0.02% stannum, 0.012% lead,
88.053% ferrum.
Embodiment 9
A kind of preparation method of high-intensity corrosion steel, comprises the steps：
Step 1：Feed charge material into and in electric arc furnace, carry out melting；
Step 2：Enter AOD furnace and carry out refine；
Step 3：Enter LF stove and carry out refine；
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% sulfur, 0.0065% aluminum, 0.0218% zinc, 0.0762% tungsten, 0.0163%
Cobalt, 0.0109% stannum, 0.0152% lead, 95.6962% ferrum.Alloy compositions (mass ratio with pig iron component)：
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 all adds in electric arc furnace, AOD furnace and LF stove and makes 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% sulfur,
10.2% chromium, 0.5% nickel, 0.31% molybdenum, 0.2% copper, 0.006% aluminum, 0.14% titanium, 0.04% vanadium,
0.03% niobium, 0.02% zinc, 0.07% tungsten, 0.015% cobalt, 0.01% stannum, 0.014% lead, 87.875%
Ferrum.
Embodiment 10
A kind of preparation method of high-intensity corrosion steel, comprises the steps：
Step 1：Feed charge material into and in electric arc furnace, carry out melting；
Step 2：Enter AOD furnace and carry out refine；
Step 3：Enter LF stove and carry out refine；
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% sulfur, 0.0076% aluminum, 0.0109% zinc, 0.0654% tungsten, 0.0109%
Cobalt, 0.0327% stannum, 0.0174% lead, 95.6512% ferrum.Alloy compositions (mass ratio with pig iron component)：
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 all adds in electric arc furnace, AOD furnace and LF stove and makes 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% sulfur,
10.5% chromium, 0.4% nickel, 0.35% molybdenum, 0.05% copper, 0.007% aluminum, 0.11% titanium, 0.03% vanadium,
0.01% niobium, 0.01% zinc, 0.06% tungsten, 0.01% cobalt, 0.03% stannum, 0.016% lead, 87.758%
Ferrum.
With reference to Fig. 1 and 2, in embodiment 6-10, it is respectively provided with the bottom centre of body of heater 1 of electric arc furnace, AOD furnace and LF stove
There is the first ventilation rifle 2 for leading to argon 6.The muzzle of the first ventilation rifle 2 is vertically oriented to the top of body of heater 1.Electric arc furnace, AOD furnace
With many second ventilation rifles 3 being provided with the top of the body of heater 1 of LF stove for leading to oxygen 7.Second ventilation rifle 3 tilts
Bottom towards body of heater 1 and the rotation direction perpendicular to molten steel.Many second ventilation rifle 3 circumferentially shape distributions.Many second lead to
The circle diameter that air gun 3 surrounds from circumference to the pipette tips that gun breech surrounds becomes larger.
The center of the bottom from body of heater 1 for the noble gases sprays, and 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
Top edge towards body of heater 1 bottom release oxygen 7 and the second ventilation rifle 3 is provided with many, many 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 of the second ventilation rifle 3 release is risen to molten steel
To active force one side 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 noble gases from the top of body of heater 1 active force to the bottom of body of heater 1, second lead to
Air gun 3 release from middle 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,
Form multiple circulation, strengthen the mixability of oxygen 7 and slag former and molten steel.
With reference to Fig. 1 and 2, each setting in electric arc furnace, the AOD furnace both sides relative with LF stove one is used for leading to the threeway of oxygen 7
Air gun 4, the direction of two relative threeway air guns 4 is contrary.When using, two threeway air gun 4 alternately logical oxygen 7.Fig. 2
Middle arrow direction indication be the oxygen of two threeway air guns 4 be passed through direction.
Assume for two relative threeway air guns 4 to be named as A rifle and B rifle, in terms of overlook direction, molten steel acts in A rifle
Lower rotate clockwise, B rifle effect under rotate counterclockwise.Then when A rifle stops ventilation, molten steel is due to inertia still
Can rotate clockwise, now the ventilation of B rifle, tissue molten steel rotates clockwise, and gradually starts to rotate counterclockwise.
And in the handoff procedure of molten steel rotation direction, there is strong turbulent flow in molten steel, the now mixing of oxygen 7 and slag former and 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,
Oil well pump, oil well set etc. need the equipment using in coastal oil well.
In tests below, using the high-intensity corrosion steel prepared according to embodiment 6-10 as material, with reference to existing production
The sucker rod that technique manufactures 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 tensile tries
Proved recipe method》National standard, the sucker rod that the present invention is obtained carries out tensile strength, yield strength, percentage elongation, contraction percentage of area examination
Test.
Table 1 Erichsen test log
As known from Table 1, the present invention has good tensile property, and the wherein tensile property of embodiment 8 is better than other embodiment.
Autoclave corrosion testing
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) configurations in Dong Xin oil recovery factory, total salinity reaches 137739mg/L.
Table 2 water sample salinity
(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 methodology
Antiseptic property is characterized using weight-loss method and surface corrosion phenomenon analysis method.
Table 3 high-temperature high-pressure anti-corrosive performance test log
As known from Table 3, the present invention has good antiseptic property, and the wherein antiseptic property of embodiment 8 is better than other embodiment.
Comparative example 1
Using 20CrMo as material, the sucker rod that manufactures with reference to existing production technology as a comparison case 1.
Comparative example 2
Remove aluminium nitride as different from Example 8, other are all same as Example 8.
Comparative example 3
Remove tungsten carbide as different from Example 8, other are all same as Example 8.
Comparative example 4
Remove aluminium nitride and tungsten carbide as different from Example 8, other are all same as Example 8 simultaneously.
Embodiment 7 and comparative example 1-4 are carried out with reference to the step of Erichsen test, fatigue test and autoclave corrosion testing
Test.
Table 4 embodiment 8 and comparative example 1-4 Erichsen test log
Table 5 embodiment 8 and comparative example 1-4 high-temperature high-pressure anti-corrosive performance test log
Can draw from table 4 and 5 to draw a conclusion：
Comparative example 8 and comparative example 1 understand, the present invention is superior to comparative example 1 on tensile property and antiseptic property.It can be seen that,
Compared to prior art, the present invention has and not only has excellent structural strength, also has excellent antiseptic property, can strengthen
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, percentage 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, percentage elongation,
This five indexs of the contraction percentage of area, homogeneous corrosion rate are all inferior to comparative example 2 and 3.It can be seen that aluminium nitride and tungsten carbide all can be to intensity
The limit, yield limit, percentage elongation, the contraction percentage of area, the performance boost generation effect of this five indexs of homogeneous corrosion rate.But,
Aluminium nitride and tungsten carbide compounding use are to strength degree, yield limit, percentage elongation, the contraction percentage of area, homogeneous corrosion rate this five
The lifting effect of index is greater than aluminium nitride and tungsten carbide is each used alone to strength degree, yield limit, percentage elongation, section
Shrinkage factor, the lifting effect sum of this five indexs of homogeneous corrosion rate.Therefore, aluminium nitride and tungsten carbide can also produce in the present invention
Raw complex role, increases decarburization and the desulphurizing ability of slag, thus further enhancing the performance of the present invention.
Claims (10)
1. a kind of high-intensity corrosion steel, is characterized in that：Component including following percentage by weight：<0.02% carbon,<0.5%
Silicon, the manganese of 0.4-0.6% ,≤0.015% phosphorus ,≤0.01% sulfur, the chromium of 9.5-10.5%, the nickel of 0.35-0.5%, 0.2-
0.35% molybdenum ,≤0.65% copper ,≤0.007% aluminum ,≤0.15% titanium ,≤0.04% vanadium ,≤0.12% niobium ,≤
0.02% zinc ,≤0.07% tungsten ,≤0.03% cobalt ,≤0.04% stannum ,≤0.02% lead, balance of ferrum.
2. a kind of preparation method of high-intensity corrosion steel as claimed in claim 1, is characterized in that：Including following preparation process：
Step 1：Feed charge material into and in electric arc furnace, carry out melting；
Step 2：Enter AOD furnace and carry out refine；
Step 3：Enter LF stove and carry out refine；
Step 4：Continuous casting and rolling；
Step 5：Temperature control controlled rolling；
Step 6：Heat treatment；
Step 7：Machining；
Slag former is all added, described slag former includes the component of following parts by weight in described electric arc furnace, AOD furnace and LF stove：
Calx 65-80 part
Sodium oxide 5-10 part
Ferrous oxide 0.3-1 part
Manganese dioxide 0.3-0.8 part
Titanium dioxide 5-15 part
Magnesium oxide 1-3 part
Aluminium nitride 0.9-1.5 part
Tungsten carbide 0.6-1.4 part.
3. the preparation method of high-intensity corrosion steel according to claim 2, is characterized in that：Described heat treatment is annealing.
4. the preparation method of high-intensity corrosion steel according to claim 2, is characterized in that：Described electric arc furnace, AOD furnace and LF
The bottom of the body of heater (1) of stove is provided with the first ventilation rifle (2), the top of the body of heater (1) of described electric arc furnace, AOD furnace and LF stove
It is provided with the second ventilation rifle (3), the sidepiece of the body of heater (1) of described electric arc furnace, AOD furnace and LF stove is provided with threeway air gun
(4).
5. the preparation method of high-intensity corrosion steel according to claim 4, is characterized in that：Described first ventilation rifle (2) is led to
Enter noble gases, described second ventilation rifle (3) and threeway air gun (4) are all passed through oxygen (7).
6. the preparation method of high-intensity corrosion steel according to claim 5, is characterized in that：Described noble gases are argon
(6).
7. the preparation method of high-intensity corrosion steel according to claim 5, is characterized in that：Described first ventilation rifle (2) sets
Put at the bottom centre of the body of heater (1) of electric arc furnace, AOD furnace and LF stove, the muzzle of described first ventilation rifle (2) is vertically oriented to stove
The top of body (1), the top of described second ventilation rifle (3) body of heater (1) in electric arc furnace, AOD furnace and LF stove be provided with multiple,
Multiple described second ventilations rifle (3) are located at the edge at the top of body of heater (1), and each described second ventilation rifle (3) tilts direction
The bottom of body of heater (1) and the rotation direction perpendicular to molten steel.
8. the preparation method of high-intensity corrosion steel according to claim 7, is characterized in that：Multiple described second ventilation rifles
(3) circumferentially shape distribution, the circle diameter that multiple described second ventilations rifle (3) surround from circumference to the pipette tips that gun breech surrounds is gradually
Become big.
9. the preparation method of high-intensity corrosion steel according to claim 5, is characterized in that：Described threeway air gun (4) exists
The each setting in electric arc furnace, the AOD furnace both sides relative with LF stove one, the direction of two relative described threeway air guns (4) is contrary,
Two relative described threeway air guns (4) replace to be ventilated.
10. high-intensity corrosion steel as claimed in claim 1 prepare sucker rod, oil pipe, oil well pump, oil well set in application.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107099756A (en) * | 2017-05-10 | 2017-08-29 | 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 |
| CN109487175A (en) * | 2018-11-22 | 2019-03-19 | 浙江睿智钢业有限公司 | A kind of high-strength corrosion-resisting sucker rod and its preparation process |
| CN111531158A (en) * | 2020-06-16 | 2020-08-14 | 江苏兴湖耐火材料有限公司 | Manufacturing method of high-strength scouring-resistant stopper rod for continuous casting |
| 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 |
| 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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| CN107099756A (en) * | 2017-05-10 | 2017-08-29 | 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 |
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| 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 |
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| CN111531158A (en) * | 2020-06-16 | 2020-08-14 | 江苏兴湖耐火材料有限公司 | Manufacturing method of high-strength scouring-resistant stopper rod for continuous casting |
| 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 |
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| JP7406177B1 (en) | 2022-02-17 | 2023-12-27 | 日本製鉄株式会社 | Steel suitable for use in sour environments |
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