CN102230144B - Steels and application thereof - Google Patents
Steels and application thereof Download PDFInfo
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- CN102230144B CN102230144B CN 201110191486 CN201110191486A CN102230144B CN 102230144 B CN102230144 B CN 102230144B CN 201110191486 CN201110191486 CN 201110191486 CN 201110191486 A CN201110191486 A CN 201110191486A CN 102230144 B CN102230144 B CN 102230144B
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Abstract
The invention discloses steels, which comprise the following raw material components in percentage by weight: 0.015 to 0.03 percent of carbon element, 8 to 12.0 percent of chromium element, 2.5 to 5.0 percent of manganese element, 0.8 to 2.0 percent of nickel element, 0.15 to 0.50 percent of molybdenum element, 0.20 to 0.80 percent of copper element and 80 to 87.5 percent of ferrum element. In the steels, the mechanical performance of the steels is enhanced, the high medium corrosivity resistance of the steels is improved substantially, and the service life of the steels is prolonged.
Description
Technical field
The present invention relates to the steel field, particularly relate to a kind of steel and application thereof.
Background technology
Oil pipe, oil well casing, sucker rod, oil well pump and the ground transport pipes etc. that use in the oil-gas field well of countries in the world exploitation all stand for a long time salt, chlorion, carbonic acid gas, hydrogen sulfide, sulfide, acid, alkali, contain the strong corrosion of the multiple corrosive mediums such as water of corrosive compound, reach the brute force wearing and tearing of the tempering property particles such as sand grains, therefore, every Year's consumptions such as oil pipe, oil well casing, sucker rod, oil well pump are all very huge, cost of winning is high, resource, energy consumption are large, are unfavorable for the low-carbon green expanding economy.How to solve heavy corrosion and the wear problem of oil pipe, oil well casing, sucker rod, oil well pump and the ground transport pipe etc. that use in the oil-gas field well, how to improve and prolong its work-ing life, it is the problem of countries in the world scientific research department research always, effectively address this problem and just seem very necessary, and be imminent.
In recent years, colleges and universities and R﹠D institution and some incorporated business relevant with the production in oil field, exploitation in the countries in the world, carried out a large amount of research work for the heavy corrosion and the wear problem that how to solve employed oil pipe in the oil-gas field well, oil well casing, sucker rod, oil well pump and ground transport pipe etc., comprised how research improves the bulk properties of material and the reinforcement performance of material surface etc.
Reinforcement aspect of performance on the research material surface, result of study comprise chronizing oil pipe, pulse Vacuum nitrogenize Anti-corrosion sucker rod, plate and ooze tungsten-bast alloy anti-corrosive abrasion-proof oil conduit sucker rod (DSW), spraying tungstenalloy anticorrosive abrasion-proof sucker rod, AOC Anti-corrosion sucker rod, nano anti-corrosion oil pumping rod etc.The common feature of existing these Anti-corrosion sucker rods is that top coat is anticorrosion, and such as diffusion coating, plating infiltration layer, and sprayed coating is surface strengthening technology and these coatings all adopt.This anti-corrosion measure can bring for part, member or the device that bears static load good preservative effect and long work-ing life, and can only play preferably preservative activity for bearing the repeated load component within certain working hour.Because the mechanical property of surface anticorrosion coating always there are differences with the mechanical property of bulk material, cause the strain of the strain of adopting top coat rot-resistant component its top layer under the effect of repeated load and body inconsistent, therefore, when load to this type component alternation after effect for some time, coating will crack or peel off with body and come off, at this moment, the corrosion speed of body will significantly be accelerated and occur losing efficacy.Obviously, the bulk properties that improves material solves heavy corrosion and the wear problem that uses in the oil-gas field well, is a kind of both economical and rational method and approach.
Aspect the bulk properties of research raising material, domestic superstrength, the bainite type, high-strength non-hardened and non-tempered with steel etc. developed once, although the mechanical property of material satisfies the service requirements of oil-gas field well, corrosion resistance nature improves little, restricts their large-scale application.In addition, also develop common austenitic stainless steel, it is essential type impregnating material, is widely used in the industries such as chemical industry, pharmacy.But because its strength property is generally all low than common steel alloy, its use range is restricted.Once development and production go out the steel alloy of several high-strength corrosion-resistings in earlier 1990s in the U.S., and its performance is very good, but its price is very expensive, are difficult to large-scale popularization application on oil-gas field well development engineering.Generally adopt in the world and add elements such as to improve thermodynamics of alloys Cr, Ni stable and directly retardance anodic process, Mo; such as Mo18-Ni40 nickel-base alloy, Ni22-25Cr stainless steel etc.; make the very fast sealer corrosion structure that forms the high stable alloy constituent element with one or several atomic layer level thickness of material surface; but; the price of Cr, Ni, Mo element is higher, and add-on surpasses the significantly production cost of increase material of 3%Mo, 5%Ni, 18%Cr.
The oil-gas field wells such as the Cr13 iron of the 10Cr3MoNi of domestic-developed and remodeling, its erosion resistance all is greatly improved with steel than conventional oil gas field wells such as 20CrMoA, but, in the multiple corrosive mediums such as sulfide hydrogen, it is poor that its anticorrosion effect just seems, according to SY 5329-1994 " petroclastic rock reservoir water water quality proposed standard " People's Republic of China's oil and gas industry standard, the corrosion speed of 10Cr3MoNi material reaches 0.7634mm/a, and the corrosion speed of the Cr13 material of remodeling reaches 0.2564mm/a.
Summary of the invention
The purpose of this invention is to provide a kind of steel, solved and born under the tension and compression repeated load problem that Corrosion Of Steel is serious in the prior art.
The present invention is achieved through the following technical solutions: a kind of steel, contain by weight percentage following feed composition: 0.015～0.03% carbon, 8.0～12.0% chromium element, 2.5～5.0% manganese element, 0.8～2.0% nickel element, 0.15～0.50% molybdenum element, 0.20～0.80% copper, 80～87.5% ferro element.
Further, above-mentioned steel contain following feed composition by weight percentage: 0.015～0.03% carbon, 9.5～10.5% chromium element, 2.5～3.0% manganese element, 1.2～1.5% nickel element, 0.15～0.50% molybdenum element, 0.20～0.60% copper, 83.87～86% ferro element.
Further, also comprise 0.02～0.10% niobium element in the above-mentioned steel.
Further, also comprise 0.05～0.10% titanium elements in the above-mentioned steel.
Simultaneously, the present invention also provides the application of a kind of above-mentioned steel in the oil-gas field well.
The beneficial effect that the present invention produces is as follows: steel provided by the present invention have not only strengthened the mechanical property of steel, and have improved significantly the high resistance corrosive medium of steel, have prolonged the work-ing life of steel.
Embodiment
Be noted that following detailed description all is exemplary, is intended to the invention provides further instruction.Unless otherwise, all technology used herein and scientific terminology have the identical meanings of usually understanding with the general technical staff of the technical field of the invention.
In a kind of typical embodiment of the present invention, a kind of steel are provided, contain by weight percentage following feed composition: 0.015～0.03% carbon, 8.0～12.0% chromium element, 2.0～5.0% manganese element, 0.8～2.0% nickel element, 0.15～0.50% molybdenum element, 0.20～0.80% copper, 80～87.5% ferro element.
In a kind of preferably embodiment of the present invention, above-mentioned steel contain following feed composition by weight percentage: 0.015～0.03% carbon, 9.5～10.5% chromium element, 2.5～3.0% manganese element, 1.2～1.5% nickel element, 0.15～0.50% molybdenum element, 0.20～0.60% copper, 83.87～86% ferro element.
In a kind of more preferably embodiment of the present invention, above-mentioned well is with also comprising 0.02～0.10% niobium element or 0.05～0.10% titanium elements in the steel.
Titanium or niobium are carbides, and major function all is crystal grain thinning and carbide and the nitride that forms titanium or niobium in steel, the Cr that reduces or avoid being harmful to
23C
6Type Carbide Precipitation, thereby intensity and the solidity to corrosion of raising steel.
In steel of the present invention, inevitably can there be a part of impurity element, such as silicon, sulphur and phosphorus etc.Siliceous amount Fractional domination is≤0.30% in steel of the present invention.Three parts silicon is equivalent to a carbon equivalent, needs the siliceous amount mark of strict control.The sulphur massfraction is controlled at≤and 0.004%.Iron sulphide helps galvanic corrosion in the steel, and special anti-H 2 S ability is hanged down an order of magnitude than prior art when smelting.
The phosphorus massfraction is controlled at≤and 0.03%.The massfraction of this part impurity can affect the result of use of steel too much.In smelting technology, take measures strictly to control.In addition, residual element As, Sn in the steel, Sb, Pb, Bi have considerable influence to well with the performance of steel, corrosion resisting property particularly, in smelting technology, should not bring into or overall control in ppm level level.
Steel preparation method provided by the present invention is identical with method of the prior art, and wherein, the smelting temperature of steel is 1650～1550 ℃, will strictly control oxide based inclusion to the impact of material property in the smelting process of steel.The rolling temperature of steel is 1200～850 ℃, cooling in heap.The thermal treatment temp of steel is 600～720 ℃.Smelt to adopt just refining of electric arc furnace that molten steel is provided, with AOD or VOD stove first steel-making water is carried out the oxygen decarburization desulfurization, further water ingot after alloying adjusting component and temperature, the refining such as degassed.Embryo flaw detection left by milling train, temperature control cool controlled rolling forming material, and arrangement is cut scale and is become a useful person after the thermal treatment.
Below in conjunction with specific embodiment 1-7 steel of the present invention are described further, and provide according to the prepared steel of embodiment 1-7 and carry out firm toughness and erosion resistance experimental data.
Embodiment 1
Material component: 0.025% carbon, 10.0% chromium element, 2.5% manganese element, 1.5% nickel element, 0.30% molybdenum element, 0.50% copper, all the other are iron.
The preparation method is same as the prior art, and the smelting temperature of steel is 1650～1550 ℃, will strictly control oxide based inclusion to the impact of material property in the smelting process of steel.The rolling temperature of steel is 1200～850 ℃, cooling in heap.The thermal treatment temp of steel is 600～720 ℃.Smelt to adopt just refining of electric arc furnace that molten steel is provided, with AOD or VOD stove first steel-making water is carried out the oxygen decarburization desulfurization, further water ingot after alloying adjusting component and temperature, the refining such as degassed.Embryo flaw detection left by milling train, temperature control cool controlled rolling forming material, and arrangement is cut scale and is become a useful person after the thermal treatment.
Embodiment 2
Material component: 0.025% carbon, 10.0% chromium element, 2.5% manganese element, 1.5% nickel element, 0.30% molybdenum element, 0.50% copper, 0.05% niobium element, all the other are iron.
The preparation method is with embodiment 1.
Embodiment 3
Material component: 0.025% carbon, 10.0% chromium element, 2.5% manganese element, 1.5% nickel element, 0.30% molybdenum element, 0.50% copper, 0.05% titanium elements, all the other are iron.
The preparation method is with embodiment 1.
Embodiment 4
Material component: 0.015% carbon, 8.0% chromium element, 2.5% manganese element, 0.8% nickel element, 0.15% molybdenum element, 0.20% copper, all the other are iron.
The preparation method is with embodiment 1.
Embodiment 5
Material component: 0.015% carbon, 9.5% chromium element, 2.5% manganese element, 1.2% nickel element, 0.15% molybdenum element, 0.20% copper, all the other are iron.
The preparation method is with embodiment 1.
Embodiment 6
Material component: 0.03% carbon, 12% chromium element, 5.0% manganese element, 2.0% nickel element, 0.5% molybdenum element, 0.80% copper, all the other are iron.
The preparation method is with embodiment 1.
Embodiment 7
Material component: 0.03% carbon, 10.5% chromium element, 3.0% manganese element, 1.5% nickel element, 0.50% molybdenum element, 0.60% copper, all the other are iron.
The preparation method is with embodiment 1.
Test
To test according to the prepared steel of embodiment 1-7, and further steel provided by the present invention be analyzed according to test result.
The mechanical property of materials: according to SY/T 5029-2006 " sucker rod " People's Republic of China's oil and gas industry standard and GB/T 228-2002 " metallic substance tensile test at room temperature method " national standard.Test result sees Table 1.
Table 1. measuring mechanical property result
By data in the table 1 as can be known, can meet in SY/T 5029-2006 " sucker rod " People's Republic of China's oil and gas industry standard and GB/T 228-2002 " the metallic substance tensile test at room temperature method " national standard requirement about the steel mechanical property according to the mechanical property of the prepared steel of embodiment of the invention 1-7.
The Corrosion Protection test: according to SY 5329-1994 " petroclastic rock reservoir water water quality proposed standard " People's Republic of China's oil and gas industry standard, test condition sees Table 2, and test result sees Table 3.
For the Corrosion Protection of the steel of identity basis embodiment of the invention 1-7 made better, the below provides two kinds of Comparative Examples, and carries out the Corrosion Protection test respectively under such as table 2 test condition.
Table 2 simulation oil field test medium forms (g/L)
Table 3 high-temperature high-pressure anti-corrosive performance test results
As can be known by under the prepared application of steel in the simulation oil field environment of the present invention, erosion rate is starkly lower than standard value by data in the table 3, and the weight loss in the use reduces, under equal conditions, steel provided by the present invention can be corrosion-resistant better, wear-resistant, increases its work-ing life.
In sum, steel provided by the present invention have not only strengthened the mechanical property of steel, and have improved significantly the high resistance corrosive medium of steel, have prolonged the work-ing life of steel.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. steel that are used for the oil-gas field well, it is characterized in that, contain by weight percentage following feed composition: 0.025% carbon, 10% chromium element, 2.5% manganese element, 1.5% nickel element, 0.3% molybdenum element, 0.5% copper, all the other are iron.
2. steel according to claim 1 is characterized in that, also comprise 0.05% niobium element.
3. steel according to claim 1 is characterized in that, also comprise 0.05～0.10% titanium elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110191486 CN102230144B (en) | 2010-11-25 | 2011-07-08 | Steels and application thereof |
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| CN201010560806.8 | 2010-11-25 | ||
| CN201010560806 | 2010-11-25 | ||
| CN 201110191486 CN102230144B (en) | 2010-11-25 | 2011-07-08 | Steels and application thereof |
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| CN102230144B true CN102230144B (en) | 2013-04-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102839333B (en) * | 2012-09-28 | 2014-03-12 | 浙江睿智钢业有限公司 | Steel, oil pumping rod containing same and application of steel |
| CN106011685B (en) * | 2016-07-07 | 2018-10-09 | 浙江睿智钢业有限公司 | The steel of high-strength corrosion-resistant and application |
| CN106734667A (en) * | 2016-12-24 | 2017-05-31 | 无锡市通亦和精密机械有限公司 | A kind of pipe expanding equipment |
| CN107043896A (en) * | 2017-03-04 | 2017-08-15 | 蒋培丽 | Anticorrosion steel and its forging technology |
| CN108998747A (en) * | 2018-08-17 | 2018-12-14 | 南京力同重工机械有限公司 | A kind of corrosion-resistant steel and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0386728A1 (en) * | 1989-03-08 | 1990-09-12 | Nippon Steel Corporation | Martensitic stainless steels excellent in corrosion resistance and stress corrosion cracking resistance and method of heat treatment of the steels |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000328202A (en) * | 1999-05-19 | 2000-11-28 | Sumitomo Metal Ind Ltd | Low carbon martensitic stainless steel sheet excellent in formability, corrosion resistance and toughness, its production method and welded steel pipe |
| JP2001179485A (en) * | 1999-12-27 | 2001-07-03 | Sumitomo Metal Ind Ltd | Martensitic stainless steel welded pipe and method for producing the same |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0386728A1 (en) * | 1989-03-08 | 1990-09-12 | Nippon Steel Corporation | Martensitic stainless steels excellent in corrosion resistance and stress corrosion cracking resistance and method of heat treatment of the steels |
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| JP特开2000-328202A 2000.11.28 |
| JP特开2001-179485A 2001.07.03 |
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