CN101906557A - Ultralow-temperature welded alloy steel and production method thereof - Google Patents
Ultralow-temperature welded alloy steel and production method thereof Download PDFInfo
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Abstract
The invention relates to ultralow-temperature welded alloy steel and the production method thereof. The production method sequentially comprises the following working procedures of: 1) smelting; 2) electroslag remelting; 3) forging; 4) steel rolling; and 5) drawing. The low-temperature impact performance of the ultralow-temperature welded alloy steel is similar to that of the austenitic stainless steel, and even under the welding state, the ultralow-temperature welded alloy steel still has enough high impact property at subzero 196 DEG C as well as good mechanical property and corrosion resistance in various corrosion media.
Description
Technical field
The present invention relates to a kind of ultralow-temperature welded alloy steel and production method thereof, be specifically related to the production method of the welding material of a kind of very low temperature, high intensity fine grain and better hot and cold plasticity.
Background technology
Along with rapid development of economy, people are increasing to the demand of the energy, and the consumption of oil and gas increases fast, and industry developments such as relevant oil and gas prospect, drilling, conveying, processing are rapid.A large amount of nickel 5 steel that use are made bearer in these industries, requirement according to working condition, especially the reservoir to Sweet natural gas need still have good plasticity and higher cold impact value index under-196 ℃ condition, in general, use nickel 5 steel can bear-156 ° low temperature and still have the good mechanical performance as welding material, originally the highest-156 ℃, but will reach below-196 ℃ the temperature of natural gas storage device, 0Cr16Ni60M used
016W4 can meet the demands as reservoir, but satisfies the corresponding supporting welding material of reservoir needs with nickel 9 steel plates of introducing with steel grade, just can not reach the hot and cold plastic property requirement that has under the very low temperature of being developed.How to reduce the intergranular corrosion tendency of OCr16Ni60Mn16W4 alloy, carbon content w (C) and silicone content w (Si) in the control alloy are to guarantee that the natural gas storage device still has the key of excellent mechanical performances at low temperatures.
Summary of the invention
At above deficiency, the object of the present invention is to provide a kind of very low temperature steel welding alloy steel and production method, be at 0Cr16Ni60M
0Add rare earth element in the 16W4 composition, and suitably reduce carbon and silicone content, reduce the intergranular corrosion tendency of alloy, carbon content w (C) and silicone content w (Si) in the control alloy make the ultralow-temperature welded alloy steel that still has good plasticity and higher cold impact value under-196 ℃ condition.
Another object of the present invention provides a kind of production method of making above-mentioned steel alloy.
Technical scheme of the present invention realizes in the following manner: a kind of very low temperature steel welding alloy steel, and by weight percentage: its chemical ingredients is:
C?0.002-0.03 Si?0.02-0.08 Mn?0.3-0.5 P?0.001-0.01 S?0.001-0.003?Cr?15.5-16 Mo?16-16.5 Ni?57.5-58.5 Cu?0.01-0.05 Fe?5.4-5.8 Al?0.001-0.3 Ti?0.1-0.4 O?0.0001-0.001 N?0.001-0.003 W?3.6-4.2 V?0.15-0.2 Co?0.1-0.3 Re?0.01-0.1。
Described Re is Ce or La.
Production method of the present invention comprises that successively following operation is: forging, 4 1) melting, 2) esr, 3)) steel rolling, 5) drawing is characterized in that:
1), melting:
A, throw in Ni, Cr, Fe earlier after 1600-1650 ℃ of following melting fusing, after adding pure W, Co, V fusing and finishing, add Mo, Mn again with the raw material of aforementioned proportion;
B, treat that fusing finishes after, fully stir with electromagnetism, the sampling analysis elemental composition, and add Al, Ti, alkene soil carries out the deoxidation slag making, reduces the steel temperature during deoxidation slag making, the steel temperature control is at 1520-1550 ℃, result to be analyzed meets the requirements, and refining is white to slag, improves tapping temperature to 1580 ℃, and pour into a mould and tap to ladle, the pouring molten steel temperature is controlled between 1480-1500 ℃;
C, when taking off punching block, treat that molten steel all solidifies, mould unloading after 20 minutes is electrode bar;
2), esr:
A, electroslag quantity of slag proportioning;
B, electrode bar fusing: add electrode bar earlier, install crystallizer, added the striking agent, feed 42 volts of voltages, electric current is 2200-2800A, adds the above-mentioned electroslag quantity of slag after the striking, slag charge is melted in the electric furnace, after treating the slag fusing, stablize above electric current, enter melted state, electrode bar is melted, have a power failure after setting regions Deng crystallizer molten steel, cool off after 10 minutes, the steel demoulding forms steel ingot;
Described electroslag quantity of slag proportioning is: aluminium powder 25g, alundum 230g, lime 100g, magnesium powder 100g, fluorite powder 1240g, titanium dioxide 25g,
3), forge:
Temperature rose to 1200-1260 ℃ with 1.5 hours with furnace temperature less than 700 ℃ when going into stove, and constant temperature 1 hour was cooled to 1200 ℃ ± 20 ℃ in 20 minutes, forged;
4), steel rolling:
Temperature rose to 1240 ℃ ± 10 ℃ with 1 hour with furnace temperature less than 700 ℃ when going into stove, was incubated 1 hour, and cooling is 1210 ℃ ± 10 ℃ in half an hour, begin rolling, the one-tenth steel ingot;
5), drawing:
A, drawing:
B, heating anneal: steel wire is annealed under 1000 ℃ of temperature, be warming up to 1200 ℃ ± 20 ℃ after 1 hour, be incubated 1 hour, water-cooled;
C, soda boiling: the soda boiling composition 480 ℃-550 ℃ of temperature, under time 15-30 minute the condition, is carried out soda boiling with parcel, middle silk, filament or welding wire after drawing;
D, pickling: pickling: prepare acid solution in sour pond, material must all immerse in the acid solution, and soak time is 20 minutes, rinses well with water blast gun after the discharging;
Described soda boiling composition is: NaOH 80, NaNo3 are 20;
Described acid solution is: 25% nitric acid, and 5-8% hydrofluoric acid, all the other are water;
E, oven dry: time: 1 hour, temperature: 250 ℃.
Beneficial effect of the present invention: be similar to austenitic stainless steel at low temperature impact properties,, still have sufficiently high impact property at-196 ℃ even under welded condition.Its mechanical property:
Corrosion-resistant, in various corrosive mediums, excellent corrosion resisting performance is arranged.Reduce silicone content and can reduce intermetallic precipitation quantity in the alloy, improved alloy intergranular corrosion performance, in addition, the formability of alloy also has greatly improved.Be characterized in low C, low Si.Under solid solution condition, has good intensity and plasticity.The present invention has further improved the intergranular corrosion resistance performance, reduce carbon content and the iron level in the alloy, removed W, added stable chemical element ti and rare earth element, be more suitable for making the corrosion resistant apparatus that needs welding, also possess better hot and cold plasticity and low-temperature impact-resistant toughness simultaneously.
Embodiment
Embodiment one:
A kind of very low temperature steel welding alloy steel, by weight percentage: its chemical ingredients is:
C?0.02 Si?0.04 Mn?0.3 P?0.01 S?0.002 Cr?15.5 Mo?16.4 Ni?57.8619 Cu?0.04 Fe?5.5 Al?0.005 Ti?0.4 O?0.0001?N?0.001?W?3.6?V?0.17 Co?0.3 Ce?0.05。
Embodiment two:
A kind of very low temperature steel welding alloy steel, by weight percentage: its chemical ingredients is:
C?0.03 Si?0.02 Mn?0.4 P?0.005 S?0.003 Cr?15.5 Mo?16 Ni?58.47 Cu?0.01 Fe?5.4 Al?0.1 Ti?0.1 O?0.0002 N?0.002?W?3.7 V?0.1398 Co?0.1 La?0.02。
Production method of the present invention comprises that successively following operation is: 1) melting, 2) esr, 3) forge, 4) steel rolling, 5), drawing;
1, melting:
A, throw in Ni, Cr, Fe earlier after 1600-1650 ℃ of following melting fusing, after adding pure W, Co, V fusing and finishing, add Mo, Mn again with the raw material of the foregoing description ratio;
B, treat that fusing finishes after, fully stir with electromagnetism, the sampling analysis elemental composition, and add Al, Ti, alkene soil carries out the deoxidation slag making, reduces the steel temperature during deoxidation slag making, the steel temperature control is at 1520-1550 ℃, result to be analyzed meets the requirements, and refining is white to slag, improves tapping temperature to 1580 ℃, and pour into a mould and tap to ladle, the pouring molten steel temperature is controlled between 1480-1500 ℃;
C, when taking off punching block, treat that molten steel all solidifies, mould unloading after 20 minutes is electrode bar;
2, esr:
A, electroslag quantity of slag proportioning: aluminium powder 25g, alundum 230g, lime 100g, magnesium powder 100g, fluorite powder 1240g, titanium dioxide 25g, standby;
B, add electrode bar earlier, install crystallizer, added the striking agent, feed 42 volts of voltages, electric current is 2200-2800A, adds the above-mentioned electroslag quantity of slag after the striking, slag charge is melted in the electric furnace, after treating the slag fusing, stablize above electric current, enter melted state, electrode bar is melted, have a power failure after setting regions Deng crystallizer molten steel, cool off after 10 minutes, the steel demoulding forms steel ingot;
3, forge:
Temperature rose to 1200-1260 ℃ with 1.5 hours with furnace temperature less than 700 ℃ when going into stove, and constant temperature 1 hour was cooled to 1200 ℃ ± 20 ℃ in 20 minutes, forged;
4, steel rolling:
Temperature rose to 1240 ℃ ± 10 ℃ with 1 hour with furnace temperature less than 700 ℃ when going into stove, was incubated 1 hour, and cooling is 1210 ℃ ± 10 ℃ in half an hour, begin rolling, the one-tenth steel ingot;
5, drawing:
A, drawing: 1. join mould: 2. drawing operation: outside wire rod, coat known lubricants on request; Must check surface quality after the drawing outlet, line footpath tolerance, every meter resistance value meets the requirements and could go up axle; Should be in drawing process according to line footpath thickness control speed, often the measuring line warp is adjusted winding displacement, whenever unload one and must wear skin again, as find defective should be in time mold exchange more;
B, heating anneal: the wire rod after the drawing is annealed under 1000 ℃ of temperature, be warming up to 1200 ℃ ± 20 ℃ after 1 hour, be incubated 1 hour, water-cooled;
C, soda boiling: soda boiling composition %:NaOH 80, NaNo3 are 20,480 ℃-550 ℃ of temperature, time 15-30 minute, the parcel after drawing, middle silk, filament or welding wire are carried out soda boiling;
D, pickling: in sour pond, carry out the preparation acid solution: 25% nitric acid, 5-8% hydrofluoric acid, all the other are water, and material must all immerse in the acid solution, and soak time is 20 minutes, rinses well with water blast gun after the discharging;
E, oven dry: time: 1 hour, temperature: 250 ℃;
6, soda boiling: the soda boiling composition by weight percentage: NaOH 80, NaNo3 are 20,480 ℃-550 ℃ of temperature, time 15-30 minute, the parcel after drawing, middle silk, filament or welding wire are carried out soda boiling.
The present invention is inclined to for the intergranular corrosion that reduces the OCr16Ni60Mn16W4 alloy, and carbon content w (C) (≤0.02%) and silicone content w (Si) (≤0.08%) grow up in the control alloy.Reduce the quantity of separating out that content can reduce carbon compound in the alloy, reduce silicone content and can reduce intermetallic precipitation quantity in the alloy, thereby reach the purpose that improves alloy intergranular corrosion performance, in addition, the formability of alloy also has greatly improved.Be characterized in low C, low Si.Under solid solution condition, has good intensity and plasticity.The present invention has further improved the intergranular corrosion resistance performance, has reduced carbon content and the iron level in the alloy, has removed W, has added stable chemical element ti, is more suitable for making the corrosion resistant apparatus that needs welding, also possesses better hot and cold plasticity simultaneously.Be similar to austenitic stainless steel at low temperature impact properties,, still have sufficiently high impact property at-196 ℃ even under welded condition.
Claims (6)
1. very low temperature steel welding alloy steel, by weight percentage, it is characterized in that: its chemical ingredients is: C 0.002-0.03 Si 0.02-0.08 Mn 0.3-0.5 P 0.001-0.01 S 0.001-0.003 Cr 15.5-16 Mo 16-16.5 Ni 57.5-58.5 Cu 0.01-0.05 Fe 5.4-5.8 Al 0.001-0.3 Ti 0.1-0.4 O 0.0001-0.001 N 0.001-0.003 W 3.6-4.2 V 0.15-0.2 Co 0.1-0.3 Le 0.01-0.1.
2. a kind of very low temperature steel welding alloy steel according to claim 1, it is characterized in that: described Le is Ce or La.
3. make the described production method of claim 1 for one kind, by weight percentage, comprise following operation successively: forging, 4 1) melting, 2) esr, 3)) steel rolling; 5) drawing is characterized in that:
1), melting:
A, throw in Ni, Cr, Fe earlier after 1600-1650 ℃ of following melting fusing, after adding pure W, Co, V fusing and finishing, add Mo, Mn again with the raw material of aforementioned proportion;
B, treat that fusing finishes after, fully stir with electromagnetism, the sampling analysis elemental composition, and add Al, Ti, alkene soil carries out the deoxidation slag making, reduces the steel temperature during deoxidation slag making, the steel temperature control is at 1520-1550 ℃, result to be analyzed meets the requirements, and refining is white to slag, improves tapping temperature to 1580 ℃, and pour into a mould and tap to ladle, the pouring molten steel temperature is controlled between 1480-1500 ℃;
C, when taking off punching block, treat that molten steel all solidifies, mould unloading after 20 minutes is electrode bar;
2), esr:
A, electroslag quantity of slag proportioning;
B, electrode bar fusing: add electrode bar earlier, install crystallizer, added the striking agent, feed 42 volts of voltages, electric current is 2200-2800A, adds the above-mentioned electroslag quantity of slag after the striking, slag charge is melted in the electric furnace, after treating the slag fusing, stablize above electric current, enter melted state, electrode bar is melted, have a power failure after setting regions Deng crystallizer molten steel, cool off after 10 minutes, the steel demoulding forms steel ingot;
3), forge:
Temperature rose to 1200-1260 ℃ with 1.5 hours with furnace temperature less than 700 ℃ when going into stove, and constant temperature 1 hour was cooled to 1200 ℃ ± 20 ℃ in 20 minutes, forged;
4), steel rolling:
Temperature rose to 1240 ℃ ± 10 ℃ with 1 hour with furnace temperature less than 700 ℃ when going into stove, was incubated 1 hour, and cooling is 1210 ℃ ± 10 ℃ in half an hour, begin rolling, the one-tenth steel ingot;
5), drawing:
A, drawing:
B, heating anneal: steel wire is annealed under 1000 ℃ of temperature, be warming up to 1200 ℃ ± 20 ℃ after 1 hour, be incubated 1 hour, water-cooled;
C, soda boiling: the soda boiling composition 480 ℃-550 ℃ of temperature, under time 15-30 minute the condition, is carried out soda boiling with parcel, middle silk, filament or welding wire after drawing;
D, pickling: prepare acid solution in sour pond, material must all immerse in the acid solution, and soak time is 20 minutes, rinses well with water blast gun after the discharging;
E, oven dry: time: 1 hour, temperature: 250 ℃.
4. production method according to claim 3 is characterized in that: A electroslag quantity of slag proportioning is described operation 2): aluminium powder 25g, alundum 230g, lime 100g, magnesium powder 100g, fluorite powder 1240g, titanium dioxide 25g.
5. production method according to claim 3 is characterized in that: described operation 5) in the drawing C soda boiling: described soda boiling composition is: NaOH 80, NaNo3 are 20.
6. production method according to claim 3 is characterized in that: described operation 5) in the drawing D pickling: described acid solution proportioning is: 25% nitric acid, and 5-8% hydrofluoric acid, all the other are water.
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| CN102337484A (en) * | 2011-09-20 | 2012-02-01 | 上海尊马不锈钢制管有限公司 | Aircraft, stainless steel used for stainless steel pipe for ultralow temperature system of aircraft and preparation method for stainless steel |
| CN104590064A (en) * | 2014-12-23 | 2015-05-06 | 宁波中哲汽车安全***有限公司 | Automobile child safety seat ISOFIX system |
| CN105846556A (en) * | 2016-05-17 | 2016-08-10 | 安徽旋利达电机有限公司 | Low temperature resistance motor rotor |
| CN105896788A (en) * | 2016-05-17 | 2016-08-24 | 安徽旋利达电机有限公司 | Low-temperature-resistant electric machinery shell |
| CN107475527A (en) * | 2017-07-27 | 2017-12-15 | 洛阳双瑞特种装备有限公司 | A kind of high efficient thermoforming process of Mo austenitic stainless steels |
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| CN102337484A (en) * | 2011-09-20 | 2012-02-01 | 上海尊马不锈钢制管有限公司 | Aircraft, stainless steel used for stainless steel pipe for ultralow temperature system of aircraft and preparation method for stainless steel |
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| CN110172644A (en) * | 2019-06-03 | 2019-08-27 | 中国兵器科学研究院宁波分院 | A kind of electric arc increasing material manufacturing high-strength steel silk material and preparation method thereof |
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| CN110343811A (en) * | 2019-07-08 | 2019-10-18 | 浙江精瑞工模具有限公司 | A kind of melting of high-ductility alloy steel forgings and forging method |
| CN110343811B (en) * | 2019-07-08 | 2021-01-15 | 浙江精瑞工模具有限公司 | Smelting and forging method of high-toughness alloy steel forging |
| CN110760718A (en) * | 2019-11-25 | 2020-02-07 | 北京科技大学 | Preparation method of high-tungsten high-cobalt nickel alloy high-purity fine-grain bar |
| EP3913101A1 (en) * | 2020-05-22 | 2021-11-24 | Nippon Steel Corporation | Ni-based alloy tube and welded joint |
| CN113718133A (en) * | 2020-05-22 | 2021-11-30 | 日本制铁株式会社 | Ni-based alloy pipe and welded joint |
| CN113718133B (en) * | 2020-05-22 | 2022-07-29 | 日本制铁株式会社 | Ni-based alloy pipe and welded joint |
| CN115044774A (en) * | 2022-06-08 | 2022-09-13 | 山东工业职业学院 | Preparation method of chromium alloy |
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Application publication date: 20101208 |