CN103789707A - Corrosion-resistant seamless steel tube material and preparation method thereof - Google Patents
Corrosion-resistant seamless steel tube material and preparation method thereof Download PDFInfo
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- CN103789707A CN103789707A CN201410018718.3A CN201410018718A CN103789707A CN 103789707 A CN103789707 A CN 103789707A CN 201410018718 A CN201410018718 A CN 201410018718A CN 103789707 A CN103789707 A CN 103789707A
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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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Abstract
The invention relates to a corrosion-resistant seamless steel tube material which comprises the following chemical elementary components in percentage by weight: 0.2-0.34% of C, 0.3-0.5% of silicon, 0.9-1.2% of manganese, 7-9% of chromium, 0.1-0.23% of antimony, 0.3-0.4% of Bi, 0.4-0.6% of vanadium, less than or equal to 0.002% of P, less than or equal to 0.015% of S and the balance of Fe and inevitable impurities. According to the steel tube material, elements such as antimony and vanadium are added, so that the material is compact in structure and fine in grain, and the strength and toughness are improved. By adding chromium and Bi, the corrosion resistance and strength are increased. By reasonably controlling the thermal treatment temperature, the comprehensive mechanical property of the steel tube material is improved, and the safety coefficient is improved. A refining agent can be fully reacted with molten steel by physicochemical reactions to realize the purpose of deoxidizing, desulfurizing, dephosphorizing and improving the shape of occluded foreign substances, so that the degree of purity of steel is improved, and the metal yield and steel tube yield are improved.
Description
Technical field
The present invention relates to field of alloy material, relate in particular to a kind of anti-corrosion seamless steel tube material and preparation method thereof.
Background technology
Steel pipe is not only for delivery of fluid and powdery solid, exchange heat energy, manufacturing machine part and container, it or a kind of economic steel.Manufacture from people's daily apparatus, furniture, water supply and sewage, air feed, ventilation and heating facility to various agricultural machinery apparatus, exploitation, national defence and the space flight firearms used of subterranean resource, bullet, guided missile, rocket etc. all be unable to do without steel pipe.
Along with production technology is constantly progressive, the raising of living standards of the people, specification of quality to steel pipe is more and more higher, not only require have higher intensity, hardness, erosion resistance, wear resistance, high temperature resistant, good springiness, counter-bending, shock-resistant, good toughness, be difficult for occurring crackle, improve safety performance, but also need to there is good processibility, reduce Financial cost, improve the competitive power of product, also need further to improve the quality of steel pipe, especially research and develop the tube material of different performances for different purposes.
Summary of the invention
The object of the present invention is to provide a kind of anti-corrosion seamless steel tube material and preparation method thereof, this tube material intensity is high, shock-resistant, corrosion-resistant, wear resistance is good.
Technical scheme of the present invention is as follows:
A kind of anti-corrosion seamless steel tube material, is characterized in that: chemical element composition and mass percent thereof that it contains are: C 0.2-0.34, silicon 0.3-0.5, manganese 0.9-1.2, chromium 7-9, antimony 0.1-0.23, Bi 0.3-0.4, vanadium 0.4-0.6, P≤0.002, S≤0.015, surplus are Fe and inevitable impurity.
The production method of described anti-corrosion seamless steel tube material, is characterized in that comprising the following steps:
(1) pig iron is sent into and in stove, added refining agent and carry out initial refining, add alloying constituent, add refining agent and carry out secondary refining, survey and adjust chemical element component content to qualified, vacuum outgas, continuous casting circular tube blank, then carry out anneal, make blank;
(2) in alloying process, first alloy and the pig iron are cast to alloy block, then throw in batches; The composition of alloy block and release sequence are (1) silicon, chromium, Fe; (2) Bi, antimony, Fe; (3) other alloying elements and Fe; Input interlude is 25-28 minute, and after throwing in, Argon stirs;
(3) add hot piercing, described blank heating is bored a hole at 1195-1205 ℃, obtain pipe, and control punch excentricity is less than 7%;
(4) thermal treatment.
Described thermal treatment is: pipe is heated to 800-830 ℃ with 23-25 ℃/s speed, and insulation 30-40 minute, then be heated to 1020-1040 ℃ with 26-28 ℃/s speed, insulation 7-10 minute, then cool to 50-90 ℃ with 240-260 ℃/h of speed; Be heated to 600-620 ℃ with 23-25 ℃/s speed again, insulation 30-40 minute, then be heated to 930-940 ℃ with 23-25 ℃/s speed, insulation 1-1.5 hour, again with 220-240 ℃/s speed spraying cooling to 320-330 ℃, then with 180-190 ℃/s speed spraying cooling to 80-100 ℃; Be heated to 580-600 ℃ with 21-23 ℃/s speed again, insulation 2-3 hour, takes out air cooling and get final product.
Described refining agent is made up of the raw material of following weight part: scrap iron powder 20-24, nano titanium oxide 0.5-1, nano mica powder 0.5-1, monazite 3-5, barium oxide 2-4, calcium oxide 6-8, chromium sesquioxide 2-4, expanded graphite 4-6; Preparation method pulverizes monazite, is heated to molten state with scrap iron powder, adds monazite, barium oxide, calcium oxide, chromium sesquioxide, expanded graphite to stir, degassed in a vacuum; Gained powder is pressed into base under 0.7-1Kpa, then, at 1210-1240 ℃, calcines 1-2 hour, cooling after, then be ground into 100-200 order powder, mix with other remaining components, to obtain final product.
Beneficial effect of the present invention
Tube material of the present invention has added the element such as antimony, vanadium, makes material structure densification, and crystal grain is thin, improves intensity and toughness; By adding chromium and Bi, erosion resistance and intensity are increased; By reasonable control thermal treatment temp, improve the comprehensive mechanical property of tube material, improve safety coefficient; Refining agent of the present invention can carry out abundant physical reaction with molten steel, reaches deoxidation, desulfurization, dephosphorization, improves inclusion morphology object, improves the purity of steel, and recovery rate of iron and Tube yield are improved.
Embodiment
A kind of anti-corrosion seamless steel tube material, chemical element composition and mass percent thereof that it contains are: C 0.2-0.34, silicon 0.3-0.5, manganese 0.9-1.2, chromium 7-9, antimony 0.1-0.23, Bi 0.3-0.4, vanadium 0.4-0.6, P≤0.002, S≤0.015, surplus are Fe and inevitable impurity.
The production method of described anti-corrosion seamless steel tube material, comprises the following steps:
(1) pig iron is sent into and in stove, added refining agent and carry out initial refining, add alloying constituent, add refining agent and carry out secondary refining, survey and adjust chemical element component content to qualified, vacuum outgas, continuous casting circular tube blank, then carry out anneal, make blank;
(2) in alloying process, first alloy and the pig iron are cast to alloy block, then throw in batches; The composition of alloy block and release sequence are (1) silicon, chromium, Fe; (2) Bi, antimony, Fe; (3) other alloying elements and Fe; Throwing in interlude is 27 minutes, and after throwing in, Argon stirs;
(3) add hot piercing, by perforation at described blank heating to 1200 ℃, obtain pipe, and control punch excentricity is less than 7%;
(4) thermal treatment.
Described thermal treatment is: pipe is heated to 820 ℃ with 24 ℃/s speed, is incubated 35 minutes, then be heated to 1030 ℃ with 27 ℃/s speed, be incubated 8 minutes, then cool to 70 ℃ with 250 ℃/h of speed; Be heated to 610 ℃ with 24 ℃/s speed again, be incubated 35 minutes, then be heated to 935 ℃ with 24 ℃/s speed, be incubated 1.3 hours, then with 230 ℃/s speed spraying cooling to 325 ℃, then with 185 ℃/s speed spraying cooling to 90 ℃; Be heated to 590 ℃ with 22 ℃/s speed again, be incubated 2.5 hours, take out air cooling and get final product.
Described refining agent by following weight part (kilogram) raw material make: scrap iron powder 22, nano titanium oxide 0.7, nano mica powder 0.8, monazite 4, barium oxide 3, calcium oxide 7, chromium sesquioxide 3, expanded graphite 5; Preparation method pulverizes monazite, is heated to molten state with scrap iron powder, adds monazite, barium oxide, calcium oxide, chromium sesquioxide, expanded graphite to stir, degassed in a vacuum; Gained powder is pressed into base under 0.8Kpa, then, at 1230 ℃, calcines 1.5 hours, cooling after, then be ground into 150 order powder, mix with other remaining components, to obtain final product.
Adopt the anti-corrosion seamless steel tube material of the present embodiment to make the steel pipe that wall thickness is 4.2mm, can bear more than 19Mpa pressure and booster not, yield strength 845MPa, tensile strength is at 957MPa, hardness (HV) 234, impact absorbing energy 55J, impelling strength 62J/cm2, unit elongation 16.5%.
Claims (4)
1. an anti-corrosion seamless steel tube material, is characterized in that: chemical element composition and mass percent thereof that it contains are: C 0.2-0.34, silicon 0.3-0.5, manganese 0.9-1.2, chromium 7-9, antimony 0.1-0.23, Bi 0.3-0.4, vanadium 0.4-0.6, P≤0.002, S≤0.015, surplus are Fe and inevitable impurity.
2. the production method of anti-corrosion seamless steel tube material according to claim 1, is characterized in that comprising the following steps:
(1) pig iron is sent into and in stove, added refining agent and carry out initial refining, add alloying constituent, add refining agent and carry out secondary refining, survey and adjust chemical element component content to qualified, vacuum outgas, continuous casting circular tube blank, then carry out anneal, make blank;
(2) in alloying process, first alloy and the pig iron are cast to alloy block, then throw in batches; The composition of alloy block and release sequence are (1) silicon, chromium, Fe; (2) Bi, antimony, Fe; (3) other alloying elements and Fe; Input interlude is 25-28 minute, and after throwing in, Argon stirs;
(3) add hot piercing, described blank heating is bored a hole at 1195-1205 ℃, obtain pipe, and control punch excentricity is less than 7%;
(4) thermal treatment.
3. the production method of anti-corrosion seamless steel tube material according to claim 2, it is characterized in that: described thermal treatment is: pipe is heated to 800-830 ℃ with 23-25 ℃/s speed, insulation 30-40 minute, be heated to 1020-1040 ℃ with 26-28 ℃/s speed again, insulation 7-10 minute, then cool to 50-90 ℃ with 240-260 ℃/h of speed; Be heated to 600-620 ℃ with 23-25 ℃/s speed again, insulation 30-40 minute, then be heated to 930-940 ℃ with 23-25 ℃/s speed, insulation 1-1.5 hour, again with 220-240 ℃/s speed spraying cooling to 320-330 ℃, then with 180-190 ℃/s speed spraying cooling to 80-100 ℃; Be heated to 580-600 ℃ with 21-23 ℃/s speed again, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of anti-corrosion seamless steel tube material according to claim 2, is characterized in that: described refining agent is made up of the raw material of following weight part: scrap iron powder 20-24, nano titanium oxide 0.5-1, nano mica powder 0.5-1, monazite 3-5, barium oxide 2-4, calcium oxide 6-8, chromium sesquioxide 2-4, expanded graphite 4-6; Preparation method pulverizes monazite, is heated to molten state with scrap iron powder, adds monazite, barium oxide, calcium oxide, chromium sesquioxide, expanded graphite to stir, degassed in a vacuum; Gained powder is pressed into base under 0.7-1Kpa, then, at 1210-1240 ℃, calcines 1-2 hour, cooling after, then be ground into 100-200 order powder, mix with other remaining components, to obtain final product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113444970A (en) * | 2021-06-22 | 2021-09-28 | 上海神洲阳光特种钢管有限公司 | Stretch-resistant stainless steel capillary tube and preparation method thereof |
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| TW201029776A (en) * | 2008-10-16 | 2010-08-16 | Uddeholm Tooling Ab | Steel material and a method for its manufacture |
| US20110085930A1 (en) * | 2007-01-12 | 2011-04-14 | Isaac Valls | Cold work tool steel with outstanding weldability |
| CN102373372A (en) * | 2010-08-23 | 2012-03-14 | 宝山钢铁股份有限公司 | High temperature resistant steel for oil well pipe and its manufacturing method |
| CN102373386A (en) * | 2011-10-10 | 2012-03-14 | 辛培兴 | Process for manufacturing high-performance alloy steel seamless steel tube |
| CN102409138A (en) * | 2011-10-31 | 2012-04-11 | 芜湖山桥铁路器材有限公司 | Process for manufacturing alloy steel for rail frog |
| WO2013167628A1 (en) * | 2012-05-07 | 2013-11-14 | Valls Besitz Gmbh | Tough bainitic heat treatments on steels for tooling |
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2014
- 2014-01-16 CN CN201410018718.3A patent/CN103789707A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101177721A (en) * | 2006-11-10 | 2008-05-14 | 攀钢集团攀枝花钢铁研究院 | Multifunctional composite refining agent for steelmaking |
| US20110085930A1 (en) * | 2007-01-12 | 2011-04-14 | Isaac Valls | Cold work tool steel with outstanding weldability |
| TW201029776A (en) * | 2008-10-16 | 2010-08-16 | Uddeholm Tooling Ab | Steel material and a method for its manufacture |
| CN102373372A (en) * | 2010-08-23 | 2012-03-14 | 宝山钢铁股份有限公司 | High temperature resistant steel for oil well pipe and its manufacturing method |
| CN102373386A (en) * | 2011-10-10 | 2012-03-14 | 辛培兴 | Process for manufacturing high-performance alloy steel seamless steel tube |
| CN102409138A (en) * | 2011-10-31 | 2012-04-11 | 芜湖山桥铁路器材有限公司 | Process for manufacturing alloy steel for rail frog |
| WO2013167628A1 (en) * | 2012-05-07 | 2013-11-14 | Valls Besitz Gmbh | Tough bainitic heat treatments on steels for tooling |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113444970A (en) * | 2021-06-22 | 2021-09-28 | 上海神洲阳光特种钢管有限公司 | Stretch-resistant stainless steel capillary tube and preparation method thereof |
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