CN103194681A - Rare earth-containing nuclear seamless steel tube material and preparation method thereof - Google Patents
Rare earth-containing nuclear seamless steel tube material and preparation method thereof Download PDFInfo
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- CN103194681A CN103194681A CN2013100932406A CN201310093240A CN103194681A CN 103194681 A CN103194681 A CN 103194681A CN 2013100932406 A CN2013100932406 A CN 2013100932406A CN 201310093240 A CN201310093240 A CN 201310093240A CN 103194681 A CN103194681 A CN 103194681A
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Abstract
The invention discloses a rare earth-containing nuclear seamless steel tube material. The seamless steel tube material comprises components in percentage by weight: 0.12-0.18 of C, 0.17-0.37 of Si, 0.6-1.0 of Mn, 0.016-0.018 of Cr, 0.02-0.04 of V, no more than 0.015 of P, no more than 0.010 of S, 0.002-0.005 of Re, and the balance of Re, wherein the sum of mass percentage is 100%. The invention further discloses a preparation method of the earth-containing nuclear seamless steel tube material. The preparation method is unique in production technique, high in production efficiency, low in cost and energy-saving and environment-friendly in production technique, the produced seamless steel tube is good in compressive strength and high-temperature resistance property, high in economic benefits, and suitable for large-scale production, and has good popularization values.
Description
Technical field
The present invention relates to a kind of metallurgical material technology, specifically, relate to a kind of rare earth seamless steel tube for nuclear power material and preparation method thereof that contains, can prepare have a compressive strength and resistance to elevated temperatures preferably contain the rare earth seamless steel tube for nuclear power.
Background technology
In China's natural energy resources resource, about 80% coal concentrates on the northwestward and the north; About 70% water resources is distributed in the west and south.Populous, Economic development is east and the southeastern coastal areas higher to electricity needs comparatively fast, and then the natural energy resources resource is most deficient.Economic development east and coastland, southeast imbalance between power supply and demand faster is more outstanding, and the pressure that causes " electricity east, west fortune is transported the coal in the North to the South " and coal electricity that environment protection is caused.Because the long-distance transportation coal goes coastland generating to cause the road transport capacity of 48% railway transport capacity and 25% occupied, cost of electricity-generating is increased, and increase the weight of this area's conventional power plant to the pollution of environment.The safety record that the Qinshan that has put into operation in the coastland and Daya Bay nuclear power plant are good and the economic benefit that obtains show that nuclear power can satisfy choose reasonable, optimization partial area energy structure of electricity needs.Actively promote the coastland nuclear power developing, will alleviate prerssure on transport greatly, favourable control CO
2Discharging and minimizing topsoil promote national sustained economic development.
Medium in the carbonated drink transport pipe of conventional island is that flow velocity height, flow are big, the saturation steam with certain humidity.Therefore, need select the weldless steel tube of compressive strength and resistance to elevated temperatures for use.
Summary of the invention
Technical problem to be solved by this invention provides a kind of rare earth seamless steel tube for nuclear power material that contains, and has compressive strength and resistance to elevated temperatures preferably.
Technical scheme of the present invention is as follows:
A kind of rare earth seamless steel tube for nuclear power material that contains, the quality percentage composition of the composition of described weldless steel tube material is: C0.12～0.18, Si0.17～0.37, Mn0.6～1.0, Cr0.016～0.018, V0.02～0.04, P≤0.015, S≤0.010, Re0.002～0.005, all the other are Fe, and each composition quality mark amounts to 100%.
Further, the quality percentage composition of the composition of described weldless steel tube material is: C is that 0.146, Si is that 0.281, Mn is that 0.745, Cr is that 0.017, V is that 0.0271, P is that 0.007, S is that 0.006, Re is 0.002, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.145, Si is that 0.260, Mn is that 0.748, Cr is that 0.018, V is that 0.0294, P is that 0.012, S is that 0.004, Re is 0.004, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.146, Si is that 0.267, Mn is that 0.488, Cr is that 0.018, V is that 0.0278, P is that 0.020, S is that 0.007, Re is 0.003, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.12, Si is that 0.37, Mn is that 1.0, Cr is that 0.018, V is that 0.04, P is that 0.007, S is that 0.004, Re is 0.005, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.18, Si is that 0.17, Mn is that 0.6, Cr is that 0.016, V is that 0.02, P is that 0.015, S is that 0.01, Re is 0.002, and all the other are Fe, and each composition quality mark amounts to 100%.
Further: Re comprises La and Ce.
Another technical problem to be solved by this invention provides a kind of preparation method who contains the rare earth seamless steel tube for nuclear power, and production efficiency height, cost are low, energy-conserving and environment-protective, can prepare have a compressive strength and resistance to elevated temperatures preferably contain the rare earth seamless steel tube for nuclear power.
Technical scheme of the present invention is as follows:
A kind of preparation method who contains the rare earth seamless steel tube for nuclear power comprises: the operation of rolling of STEELMAKING PRODUCTION process, weldless steel tube and roll attitude weldless steel tube heat treatment process; The quality percentage composition of the composition that contains the rare earth seamless steel tube for nuclear power that production obtains is: C0.12～0.18, Si0.17～0.37, Mn0.6～1.0, Cr0.016～0.018, V0.02～0.04, P≤0.015, S≤0.010, Re0.002～0.005, all the other are Fe, each composition quality mark amounts to 100%; Wherein, Re comprises La and Ce.
Further, described STEELMAKING PRODUCTION process comprises: hot metal pretreatment, converter smelting, LF refining, the VD degassing and round billet continuous casting.
Further: described converter smelting adopts 100 tons of top and bottom combined blown converters, adopt desulphurised hot metal, ferrosilicon, manganeseirom adopt deoxidation alloying, single slag technology, finishing slag basicity is by 3.0 controls, and the quality percentage composition that the quality percentage composition of converter terminal Composition Control C is not less than 0.03%, P is not more than 0.01%, the control of converter molten steel temperature adds lime piece 100～300kg more than 1600 ℃ in tapping process; Single refining production is adopted in described LF refining, and whole process is carried out slag making desulfurization, molten steel heating and composition adjustment by the normal Argon of refining according to converter molten steel composition and temperature; Add 100 meters of rare-earth wires before the described VD degassing, rare-earth wires contains rare earth 165g/ rice, VD vacuum tightness≤0.10KPa, and dark vacuum time 〉=13min feeds 150 meters of silicon-calcium wires after the vacuum, carry out soft blow afterwards, and the soft blow time is greater than 8min; Described round billet continuous casting adopts the induction stirring mode, condensate depression Δ T≤30 ℃, and pulling rate is controlled at 1.0m/min, constant pulling rate, the stacking type of cooling is adopted in cooling.
Further, the operation of rolling of described weldless steel tube comprises: justify base sawing, heating, perforation, tube rolling, tension reducing, sampling, cooling, crop end, aligning, inspection, pack, weigh and put in storage; Temperature was 1250～1280 ℃ when described round base was bored a hole; Temperature is 1180～1220 ℃ during tube rolling; Fixed open that temperature is 820～860 ℃ when subtracting.
Further, described rolling in the attitude weldless steel tube heat treatment process 890～940 ℃ of normalizings, is incubated the air cooling of coming out of the stove after 30～60 minutes to room temperature.
Further, the quality percentage composition of producing the composition that contains the rare earth seamless steel tube for nuclear power obtain is: C is that 0.146, Si is that 0.281, Mn is 0.745, Cr is that 0.017, V is that 0.0271, P is that 0.007, S is 0.006, Re is 0.002, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.145, Si is that 0.260, Mn is that 0.748, Cr is that 0.018, V is that 0.0294, P is that 0.012, S is that 0.004, Re is 0.004, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.146, Si is that 0.267, Mn is that 0.488, Cr is that 0.018, V is that 0.0278, P is that 0.020, S is that 0.007, Re is 0.003, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.12, Si is that 0.37, Mn is that 1.0, Cr is that 0.018, V is that 0.04, P is that 0.007, S is that 0.004, Re is 0.005, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.18, Si is that 0.17, Mn is that 0.6, Cr is that 0.016, V is that 0.02, P is that 0.015, S is that 0.01, Re is 0.002, and all the other are Fe, and each composition quality mark amounts to 100%.
Technique effect of the present invention is as follows:
The invention provides a kind of rare earth seamless steel tube for nuclear power material that contains, V can crystal grain thinning, thereby improve the obdurability of steel, Re makes steel have good toughness, has good intensity, toughness and mechanical behavior under high temperature with the rare earth seamless steel tube for nuclear power that contains of its preparation.The present invention contains the rare earth seamless steel tube for nuclear power and has unique production process, production efficiency height, low, the energy-saving production technology environmental protection of cost, the weldless steel tube of producing has good compressive strength and resistance to elevated temperatures, and is good in economic efficiency, be suitable for scale operation, excellent generalization values is arranged.
Embodiment
It is raw material that the present invention adopts the own ore of Baogang, contains rare earth element in this ore.This rare earth element comprises La and Ce.
The STEELMAKING PRODUCTION process of steel is:
It is the hot metal pretreatment → converter smelting → LF refining → VD degassing → round billet continuous casting that steel are smelted the continuous casting process flow process.Wherein smelt and adopt 100 tons of top and bottom combined blown converters, adopt desulphurised hot metal, alloys such as ferrosilicon, ferromanganese adopt deoxidation alloying, single slag technology, and finishing slag basicity is by 3.0 controls.Converter terminal Composition Control carbon is not less than 0.03%, and phosphorus is not more than 0.01%, and the converter molten steel temperature is controlled more than 1600 ℃, adds lime piece 100～300kg in tapping process.Single refining production is adopted in the LF refining, and whole process is carried out slag making desulfurization, molten steel heating and composition adjustment by the normal Argon of refining according to converter molten steel composition and temperature.Add 100 meters of rare-earth wires before the VD, rare-earth wires contains rare earth 165g/ rice, VD vacuum tightness≤0.10KPa, and dark vacuum time 〉=13min feeds 150 meters of silicon-calcium wires after the vacuum, carry out soft blow afterwards, and the soft blow time was greater than 8 minutes.Continuous casting adopts the induction stirring mode, condensate depression Δ T≤30 ℃, and pulling rate is controlled at the constant pulling rate of 1.0m/min, and the stacking type of cooling is adopted in cooling.
LF stove (LADLE FURNACE) is ladle refining furnace, is external refining equipment main in the Iron and Steel Production.VD shaped steel bag refining furnace is alloying constituent fine setting under oxygen blast under vacuum, decarburization, vacuum stripping, the vacuum, is mainly used in refining ultra low-carbon steel and electrical pure iron etc.; VD shaped steel bag refining furnace can carry out alloying constituent fine setting under general vacuum outgas processing and the vacuum to molten steel.
After testing, the quality percentage composition of the composition of each sample is as shown in table 1.
Each sample composition of table 1 (mass percent/%)
The operation of rolling of weldless steel tube is: circle base → sawing → heating → perforation → tube rolling → tension reducing → sampling → cooling → crop end → align → check → pack → weigh → put in storage.Temperature is 1250～1280 ℃ during its circle base perforation; Temperature is 1180～1220 ℃ during tube rolling; Fixed open that temperature is 820～860 ℃ when subtracting.
Rolling attitude weldless steel tube heat treatment process is: 890～940 ℃ of normalizings, be incubated the air cooling of coming out of the stove after 30～60 minutes to room temperature.Adopt this heat treating regime, can make organizing of material more tiny evenly, thereby guarantee its favorable mechanical performance and stability thereof.
The mechanical property of the weldless steel tube after the thermal treatment is as shown in table 2.
Each sample mechanical property of table 2
As can be seen from Table 2, the weldless steel tube of each sample has good intensity, toughness and mechanical property.
Because rolling and thermal treatment influences not too obvious to this material chemical composition, therefore contain rare earth seamless steel tube for nuclear power, the quality percentage chemical ingredients of its material: C0.12～0.18, Si0.17～0.37 through said process production, Mn0.6～1.0, Cr0.016～0.018, V0.02～0.04, P≤0.015, S≤0.010, Re0.002～0.005, all the other are Fe, each composition quality mark amounts to 100%; Re comprises La and Ce.Main alloy element V in the composition of this weldless steel tube can crystal grain thinning, thereby improves the obdurability of steel, and Re makes steel have good toughness.
The high-temperature yield strength of the weldless steel tube after the thermal treatment is as shown in table 3.
Each sample high-temperature yield strength (MPa) of table 3
| Sample | 250℃ | 300℃ |
| Sample 1 | 254 | 239 |
| Sample 2 | 247 | 236 |
| Sample 3 | 246 | 234 |
| Sample 4 | 251 | 236 |
| Sample 5 | 245 | 233 |
As can be seen from Table 3, the weldless steel tube of each sample has the excellent high-temperature yield strength, well compressive strength and high warm nature.Every performance satisfies the requirement of seamless steel tube for nuclear power under the severe condition.
Claims (9)
1. one kind contains rare earth seamless steel tube for nuclear power material, it is characterized in that the quality percentage composition of the composition of described weldless steel tube material is: C0.12～0.18, Si0.17～0.37, Mn0.6～1.0, Cr0.016～0.018, V0.02～0.04, P≤0.015, S≤0.010, Re0.002～0.005, all the other are Fe, each composition quality mark amounts to 100%.
2. the rare earth seamless steel tube for nuclear power material that contains as claimed in claim 1, it is characterized in that the quality percentage composition of the composition of described weldless steel tube material is: C is that 0.146, Si is 0.281, Mn is 0.745, Cr is that 0.017, V is that 0.0271, P is 0.007, S is 0.006, Re is 0.002, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.145, Si is that 0.260, Mn is that 0.748, Cr is that 0.018, V is that 0.0294, P is that 0.012, S is that 0.004, Re is 0.004, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.146, Si is that 0.267, Mn is that 0.488, Cr is that 0.018, V is that 0.0278, P is that 0.020, S is that 0.007, Re is 0.003, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.12, Si is that 0.37, Mn is that 1.0, Cr is that 0.018, V is that 0.04, P is that 0.007, S is that 0.004, Re is 0.005, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.18, Si is that 0.17, Mn is that 0.6, Cr is that 0.016, V is that 0.02, P is that 0.015, S is that 0.01, Re is 0.002, and all the other are Fe, and each composition quality mark amounts to 100%.
3. as claim 1 or 2 arbitrary described rare earth seamless steel tube for nuclear power materials that contain, it is characterized in that: Re comprises La and Ce.
4. a preparation method who contains the rare earth seamless steel tube for nuclear power is characterized in that, comprising: the operation of rolling of STEELMAKING PRODUCTION process, weldless steel tube and roll attitude weldless steel tube heat treatment process; The quality percentage composition of the composition that contains the rare earth seamless steel tube for nuclear power that production obtains is: C0.12～0.18, Si0.17～0.37, Mn0.6～1.0, Cr0.016～0.018, V0.02～0.04, P≤0.015, S≤0.010, Re0.002～0.005, all the other are Fe, each composition quality mark amounts to 100%; Wherein, Re comprises La and Ce.
5. the preparation method who contains the rare earth seamless steel tube for nuclear power as claimed in claim 4 is characterized in that, described STEELMAKING PRODUCTION process comprises: hot metal pretreatment, converter smelting, LF refining, the VD degassing and round billet continuous casting.
6. the preparation method who contains the rare earth seamless steel tube for nuclear power as claimed in claim 5, it is characterized in that: described converter smelting adopts 100 tons of top and bottom combined blown converters, adopt desulphurised hot metal, ferrosilicon, manganeseirom adopt deoxidation alloying, single slag technology, and finishing slag basicity is by 3.0 controls, the quality percentage composition of converter terminal Composition Control C is not less than 0.03%, the quality percentage composition of P is not more than 0.01%, and the converter molten steel temperature is controlled more than 1600 ℃, adds lime piece 100～300kg in tapping process; Single refining production is adopted in described LF refining, and whole process is carried out slag making desulfurization, molten steel heating and composition adjustment by the normal Argon of refining according to converter molten steel composition and temperature; Add 100 meters of rare-earth wires before the described VD degassing, rare-earth wires contains rare earth 165g/ rice, VD vacuum tightness≤0.10KPa, and dark vacuum time 〉=13min feeds 150 meters of silicon-calcium wires after the vacuum, carry out soft blow afterwards, and the soft blow time is greater than 8min; Described round billet continuous casting adopts the induction stirring mode, condensate depression Δ T≤30 ℃, and pulling rate is controlled at 1.0m/min, constant pulling rate, the stacking type of cooling is adopted in cooling.
7. the preparation method who contains the rare earth seamless steel tube for nuclear power as claimed in claim 4, it is characterized in that the operation of rolling of described weldless steel tube comprises: justify base sawing, heating, perforation, tube rolling, tension reducing, sampling, cooling, crop end, aligning, inspection, pack, weigh and put in storage; Temperature was 1250～1280 ℃ when described round base was bored a hole; Temperature is 1180～1220 ℃ during tube rolling; Fixed open that temperature is 820～860 ℃ when subtracting.
8. the preparation method who contains the rare earth seamless steel tube for nuclear power as claimed in claim 4 is characterized in that, described rolling in the attitude weldless steel tube heat treatment process 890～940 ℃ of normalizings, is incubated the air cooling of coming out of the stove after 30～60 minutes to room temperature.
9. as the arbitrary described preparation method who contains the rare earth seamless steel tube for nuclear power of claim 4-8, it is characterized in that the quality percentage composition of producing the composition that contains the rare earth seamless steel tube for nuclear power that obtains is: C is that 0.146, Si is 0.281, Mn is 0.745, Cr is that 0.017, V is that 0.0271, P is 0.007, S is 0.006, Re is 0.002, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.145, Si is that 0.260, Mn is that 0.748, Cr is that 0.018, V is that 0.0294, P is that 0.012, S is that 0.004, Re is 0.004, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.146, Si is that 0.267, Mn is that 0.488, Cr is that 0.018, V is that 0.0278, P is that 0.020, S is that 0.007, Re is 0.003, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.12, Si is that 0.37, Mn is that 1.0, Cr is that 0.018, V is that 0.04, P is that 0.007, S is that 0.004, Re is 0.005, and all the other are Fe, and each composition quality mark amounts to 100%; Perhaps, C is that 0.18, Si is that 0.17, Mn is that 0.6, Cr is that 0.016, V is that 0.02, P is that 0.015, S is that 0.01, Re is 0.002, and all the other are Fe, and each composition quality mark amounts to 100%.
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| CN111485172A (en) * | 2020-04-07 | 2020-08-04 | 包头钢铁（集团）有限责任公司 | Rare earth microalloyed nuclear seamless steel tube and production method thereof |
| CN113235010A (en) * | 2021-05-19 | 2021-08-10 | 宝武集团鄂城钢铁有限公司 | Preparation method of nuclear power steel plate with thin specification and uniform whole plate performance |
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