CN103789629A - Wear-resistant seamless steel tube material and preparation method thereof - Google Patents
Wear-resistant seamless steel tube material and preparation method thereof Download PDFInfo
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- CN103789629A CN103789629A CN201410018588.3A CN201410018588A CN103789629A CN 103789629 A CN103789629 A CN 103789629A CN 201410018588 A CN201410018588 A CN 201410018588A CN 103789629 A CN103789629 A CN 103789629A
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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
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Abstract
The invention discloses a wear-resistant seamless steel tube material. The wear-resistant seamless steel tube material comprises the following chemical elements in percentage by mass: 0.06-0.10 percent of C, 0.3-0.5 percent of Si, 1.7-2.0 percent of Mn, 0.2-0.4 percent of Cu, 0.1-0.3 percent of Zr, 0.5-0.8 percent of Ni, 0.1-0.3 percent of Hf, 0.02-0.04 percent of Y, 0.02-0.03 percent of Sr, not more than 0.015 percent of P, not more than 0.006 percent of S, and the balance of Fe and inevitable impurities. The steel tube material is high in strength, good in toughness, and good in welding performance and machining performance; by adding the elements such as Zr and Y, an alloy is good in wear resistance; by reasonably controlling the heat treatment temperature, the comprehensive mechanical performance of the steel tube material is improved, and the safety coefficients are improved; a refining agent can be in physicochemical reaction with molten steel, the aims of deoxidation, desulfuration, dephosphorization and inclusion form improvement are reached, the purity of steel is improved, and the metal yield and the steel tube yield are improved.
Description
Technical field
The present invention relates to field of alloy material, relate in particular to a kind of wear-resisting weldless 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 wear-resisting weldless steel tube material and preparation method thereof, this tube material intensity is high, good toughness, welding and good processability, and wear resistance is good.
Technical scheme of the present invention is as follows:
A kind of wear-resisting weldless steel tube material, is characterized in that: chemical element composition and mass percent thereof that it contains are: C 0.06-0.10, Si0.3-0.5, Mn1.7-2.0, Cu0.2-0.4, Zr0.1-0.3, Ni0.5-0.8, Hf0.1-0.3, Y0.02-0.04, Sr0.02-0.03, P≤0.015, S≤0.006, surplus are Fe and inevitable impurity.
The production method of described wear-resisting weldless 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) Si, Cu, Fe; (2) Ni, Y, Fe; (3) Zr, Hf, Fe; (4) other alloying elements and Fe; Input interlude is 24-26 minute, and after throwing in, Argon stirs;
(3) add hot piercing, described blank heating is bored a hole at 1175-1185 ℃, obtain pipe, and control punch excentricity is less than 7%;
(4) thermal treatment.
Described thermal treatment is: pipe is heated to 800-820 ℃ with 25-26 ℃/s speed, and insulation 30-40 minute, then be heated to 1010-1020 ℃ with 27-29 ℃/s speed, insulation 8-10 minute, then cool to 50-90 ℃ with 240-260 ℃/h of speed; Be heated to 630-640 ℃ 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 240-250 ℃/s speed spraying cooling to 300-310 ℃, then with 190-200 ℃/s speed spraying cooling to 60-90 ℃; Be heated to 550-560 ℃ 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 intensity of the present invention is high, good toughness, and welding and good processability, by adding the elements such as Zr, Y, make the wear resistance of alloy good; 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 wear-resisting weldless steel tube material, chemical element composition and mass percent thereof that it contains are: C 0.06-0.10, Si0.3-0.5, Mn1.7-2.0, Cu0.2-0.4, Zr0.1-0.3, Ni0.5-0.8, Hf0.1-0.3, Y0.02-0.04, Sr0.02-0.03, P≤0.015, S≤0.006, surplus are Fe and inevitable impurity.
The production method of described wear-resisting weldless 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) Si, Cu, Fe; (2) Ni, Y, Fe; (3) Zr, Hf, Fe; (4) other alloying elements and Fe; Throwing in interlude is 25 minutes, and after throwing in, Argon stirs;
(3) add hot piercing, by perforation at described blank heating to 1180 ℃, obtain pipe, and control punch excentricity is less than 7%;
(4) thermal treatment.
Described thermal treatment is: pipe is heated to 810 ℃ with 25 ℃/s speed, is incubated 35 minutes, then be heated to 1015 ℃ with 28 ℃/s speed, be incubated 9 minutes, then cool to 70 ℃ with 250 ℃/h of speed; Be heated to 635 ℃ 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 245 ℃/s speed spraying cooling to 305 ℃, then with 195 ℃/s speed spraying cooling to 70 ℃; Be heated to 555 ℃ 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 wear-resisting weldless 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 798MPa, tensile strength is at 856MPa, hardness (HV) 238, impact absorbing energy 48J, impelling strength 59J/cm2, unit elongation 15.6%.
Claims (4)
1. a wear-resisting weldless steel tube material, is characterized in that: chemical element composition and mass percent thereof that it contains are: C 0.06-0.10, Si0.3-0.5, Mn1.7-2.0, Cu0.2-0.4, Zr0.1-0.3, Ni0.5-0.8, Hf0.1-0.3, Y0.02-0.04, Sr0.02-0.03, P≤0.015, S≤0.006, surplus are Fe and inevitable impurity.
2. the production method of wear-resisting weldless 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) Si, Cu, Fe; (2) Ni, Y, Fe; (3) Zr, Hf, Fe; (4) other alloying elements and Fe; Input interlude is 24-26 minute, and after throwing in, Argon stirs;
(3) add hot piercing, described blank heating is bored a hole at 1175-1185 ℃, obtain pipe, and control punch excentricity is less than 7%;
(4) thermal treatment.
3. the production method of wear-resisting weldless steel tube material according to claim 2, it is characterized in that: described thermal treatment is: pipe is heated to 800-820 ℃ with 25-26 ℃/s speed, insulation 30-40 minute, be heated to 1010-1020 ℃ with 27-29 ℃/s speed again, insulation 8-10 minute, then cool to 50-90 ℃ with 240-260 ℃/h of speed; Be heated to 630-640 ℃ 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 240-250 ℃/s speed spraying cooling to 300-310 ℃, then with 190-200 ℃/s speed spraying cooling to 60-90 ℃; Be heated to 550-560 ℃ with 21-23 ℃/s speed again, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of wear-resisting weldless 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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| Application Number | Priority Date | Filing Date | Title |
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| CN201410018588.3A CN103789629A (en) | 2014-01-16 | 2014-01-16 | Wear-resistant seamless steel tube material and preparation method thereof |
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| CN201410018588.3A CN103789629A (en) | 2014-01-16 | 2014-01-16 | Wear-resistant seamless steel tube material and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1401012A (en) * | 2000-02-28 | 2003-03-05 | 新日本制铁株式会社 | Steel pipe having excellent formability and method for production thereof |
| JP2005336599A (en) * | 2003-10-31 | 2005-12-08 | Jfe Steel Kk | High strength stainless steel pipe for line pipe excellent in corrosion resistance and method for production thereof |
| CN101602079A (en) * | 2009-07-03 | 2009-12-16 | 马景怡 | Make the method for wear-resistant steel pipe with hot-rolled coil |
| CN102581555A (en) * | 2012-02-21 | 2012-07-18 | 衡阳华菱钢管有限公司 | P91 seamless steel pipe and method for manufacturing same |
| JP2013133519A (en) * | 2011-12-27 | 2013-07-08 | Jfe Steel Corp | High-strength hot-rolled steel sheet for warm forming and manufacturing method therefor |
-
2014
- 2014-01-16 CN CN201410018588.3A patent/CN103789629A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1401012A (en) * | 2000-02-28 | 2003-03-05 | 新日本制铁株式会社 | Steel pipe having excellent formability and method for production thereof |
| JP2005336599A (en) * | 2003-10-31 | 2005-12-08 | Jfe Steel Kk | High strength stainless steel pipe for line pipe excellent in corrosion resistance and method for production thereof |
| CN101602079A (en) * | 2009-07-03 | 2009-12-16 | 马景怡 | Make the method for wear-resistant steel pipe with hot-rolled coil |
| JP2013133519A (en) * | 2011-12-27 | 2013-07-08 | Jfe Steel Corp | High-strength hot-rolled steel sheet for warm forming and manufacturing method therefor |
| CN102581555A (en) * | 2012-02-21 | 2012-07-18 | 衡阳华菱钢管有限公司 | P91 seamless steel pipe and method for manufacturing same |
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Application publication date: 20140514 |
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