CN103147003B - Containing niobium pressure-bearing weldless steel tube and preparation method thereof - Google Patents
Containing niobium pressure-bearing weldless steel tube and preparation method thereof Download PDFInfo
- Publication number
- CN103147003B CN103147003B CN201310093027.5A CN201310093027A CN103147003B CN 103147003 B CN103147003 B CN 103147003B CN 201310093027 A CN201310093027 A CN 201310093027A CN 103147003 B CN103147003 B CN 103147003B
- Authority
- CN
- China
- Prior art keywords
- content
- steel tube
- bearing
- pressure
- weldless steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a kind of containing niobium pressure-bearing weldless steel tube, does is the mass percent of its chemical composition: C? 0.10 ~ 0.16, Si? 0.17 ~ 0.35, Mn? 0.54 ~ 0.80, Cr? 0.020 ~ 0.022, Mo≤0.08, P≤0.02, S≤0.02, Nb? 0.001 ~ 0.005, Altol? 0.02 ~ 0.045, Ti? 0.02 ~ 0.04, Ni≤0.3, Cu≤0.3; All the other are Fe, and each composition quality mark amounts to 100%.The invention also discloses a kind of preparation method containing niobium pressure-bearing weldless steel tube.The weldless steel tube utilizing technical solution of the present invention to prepare has good compressive strength and high thermal resistance.
Description
Technical field
The present invention relates to and belong to metallurgical material field, specifically, relate to a kind of containing niobium pressure-bearing weldless steel tube and preparation method thereof.
Background technology
For pressure-bearing weldless steel tube, its high thermal resistance and compressive strength are main technical indicators, but, current be pressure-bearing weldless steel tube mainly focuses on compressive strength, and at pressure-bearing steel, another technical indicator high thermal resistance of pressure-bearing weldless steel tube requires that the today of making rapid progress seems more and more important.
Summary of the invention
Technical problem solved by the invention is to provide a kind of containing niobium pressure-bearing weldless steel tube, and the soft steel that there is niobium element has good strength, toughness and mechanical behavior under high temperature.
Technical scheme is as follows:
A kind of containing niobium pressure-bearing weldless steel tube, the percent mass of its material chemical composition is: C0.10 ~ 0.16, Si0.17 ~ 0.35, Mn0.54 ~ 0.80, Cr0.020 ~ 0.022, Mo≤0.08, P≤0.02, S≤0.02, Nb0.001 ~ 0.005, Altol0.02 ~ 0.045, Ti0.02 ~ 0.04, Ni≤0.3, Cu≤0.3; All the other are Fe, and each composition quality mark amounts to 100%.
Further: the content of C is 0.14, the content of the content of Si to be the content of 0.27, Mn be 0.58, Cr is 0.021, the content of Mo is 0.005, the content of the content of P to be the content of 0.012, S be 0.006, Nb is 0.002, the content of Altol is 0.023, the content of the content of Ti to be the content of 0.032, Ni be 0.009, Cu is 0.006.
Further: the content of C is 0.12, the content of the content of Si to be the content of 0.21, Mn be 0.55, Cr is 0.020, the content of Mo is 0.006, the content of the content of P to be the content of 0.012, S be 0.007, Nb is 0.0021, the content of Altol is 0.028, the content of the content of Ti to be the content of 0.033, Ni be 0.012, Cu is 0.008.
Further: the content of C is 0.12, the content of the content of Si to be the content of 0.23, Mn be 0.55, P is 0.013, the content of S is 0.006, the content of the content of Cr to be the content of 0.022, Mo be 0.006, Altol is 0.020, the content of Ni is 0.010, the content of the content of Cu to be the content of 0.007, Ti be 0.031, Nb is 0.0020.
Further: the content of C is 0.11, the content of the content of Si to be the content of 0.22, Mn be 0.54, P is 0.010, the content of S is 0.005, the content of the content of Cr to be the content of 0.021, Mo be 0.005, Altol is 0.020, the content of Ni is 0.011, the content of the content of Cu to be the content of 0.008, Ti be 0.030, Nb is 0.0022.
Another technical problem solved by the invention is to provide a kind of preparation method containing niobium pressure-bearing weldless steel tube, produces the niobium pressure-bearing weldless steel tube that contains obtained and has good compressive strength and high thermal resistance.
Technical scheme is as follows:
Containing the preparation method of niobium pressure-bearing weldless steel tube, comprise steelmaking process, the operation of rolling of weldless steel tube and pressure-bearing weldless steel tube heat treatment process; 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; During its circle base perforation, temperature is 1250 ~ 1280 DEG C, and during tube rolling, temperature is 1180 ~ 1220 DEG C, and determining to open temperature when subtracting is 820 ~ 860 DEG C; In described pressure-bearing weldless steel tube heat treatment process, normalizing temperature is 880 ~ 940 DEG C, is incubated 20 ~ 40 minutes; The mass percent of producing the chemical composition containing niobium pressure-bearing weldless steel tube obtained is C0.10 ~ 0.16, Si0.17 ~ 0.35, Mn0.60 ~ 0.80, Cr0.020 ~ 0.022, Mo≤0.08, P≤0.02, S≤0.02, Nb0.001 ~ 0.005, Altol0.02 ~ 0.045, Ti0.02 ~ 0.04, Ni≤0.3, Cu≤0.3, all the other are Fe, and each composition quality mark amounts to 100%.
Further, steelmaking process comprises: the degassed and round billet continuous casting of molten iron converter smelting, LF refining, VD; Described converter smelting adopts 100 tons of top and bottom combined blown converters, adopt desulphurised hot metal, ferrosilicon and manganeseirom is adopted to carry out deoxidation alloying, single slag technique, finishing slag basicity controls by 3.0, and converter terminal Composition Control carbon is not less than 0.03%, and phosphorus is not more than 0.01%, liquid steel temperature controls more than 1600 DEG C, and tapping process adds lime block 100 ~ 300KG; LF refining adopts single refining to produce, and whole process, by the normal Argon of refining, carries out slag making desulfurization, molten steel heating and composition adjustment according to converter molten steel composition and temperature; VD vacuum tightness≤0.10KPa, dark vacuum time >=13min, feed silicon-calcium wire 150 meters after vacuum, carry out soft blow afterwards, the soft blow time is greater than 8 minutes; Continuous casting adopts induction stirring mode, and condensate depression Δ T≤30 DEG C, casting speed control is at the constant pulling rate of 1.0m/min.
Technique effect comprises:
The invention provides a kind of containing niobium pressure-bearing weldless steel tube and preparation method thereof, the soft steel that there is niobium element has good strength, toughness and mechanical behavior under high temperature, has good compressive strength and high thermal resistance with weldless steel tube prepared by technical solution of the present invention.The present invention has unique production technique containing niobium pressure-bearing weldless steel tube, and production technique production efficiency is high, cost is low, energy-conserving and environment-protective, and weldless steel tube has good compressive strength and high thermal resistance, is suitable for scale operation.
Embodiment
The present invention utilizes Baogang to have the natural characteristic containing niobium in ore by oneself, smelts the steel to have good strength, toughness and mechanical behavior under high temperature, the basis not increasing production cost is prepared the pressure-bearing weldless steel tube of satisfactory mechanical property.
In the present invention, containing niobium pressure-bearing weldless steel tube, the mass percent of its chemical composition is: C0.10 ~ 0.16; Si0.17 ~ 0.35; Mn0.54 ~ 0.80; Cr≤0.3; Mo≤0.08; P≤0.02; S≤0.02; Nb0.001 ~ 0.005; Al
tol0.02 ~ 0.045; Ti0.02 ~ 0.04; Ni≤0.3; Cu≤0.3; All the other are Fe, and each composition quality mark amounts to 100%; The alloying elements cr of this material composition makes steel have certain resistance to corrosion; Mo improves the hot strength of steel; The superheated susceptivity of Nb crystal grain thinning and reduction steel, improves hot strength; Ti makes the dense internal organization of steel, crystal grain thinning; Al crystal grain thinning, improves impelling strength.Nb in the present invention is not additional alloy, but Baogang has the natural niobium contained in ore by oneself is deposited in the content in final finished steel.
Preparation method containing niobium pressure-bearing weldless steel tube comprises three steps on the whole: the operation of rolling of steelmaking process, weldless steel tube and pressure-bearing weldless steel tube heat treatment process.
Continuous casting process flow process smelted by steel: hot metal pretreatment → converter smelting → LF refining → VD is degassed → and round billet continuous casting.Wherein smelt employing 100 tons of top and bottom combined blown converters, adopt desulphurised hot metal, the alloy such as ferrosilicon, ferromanganese adopts deoxidation alloying, single slag technique, finishing slag basicity controls by 3.0, and converter terminal Composition Control carbon is not less than 0.03%, and phosphorus is not more than 0.01%, liquid steel temperature controls more than 1600 DEG C, and tapping process adds lime block 100 ~ 300KG.LF refining adopts single refining to produce, and whole process, by the normal Argon of refining, carries out slag making desulfurization, molten steel heating and composition adjustment according to converter molten steel composition and temperature.VD vacuum tightness≤0.10KPa, dark vacuum time >=13min, feed silicon-calcium wire 150 meters after vacuum, carry out soft blow afterwards, the soft blow time is greater than 8 minutes.Continuous casting adopts induction stirring mode, condensate depression Δ T≤30 DEG C, and casting speed control is at the constant pulling rate of 1.0m/min, and cooling adopts the stacking type of cooling.
LF stove (LADLEFURNACE) i.e. ladle refining furnace is external refining equipment main in Iron and Steel Production.VD type ladle refining furnace is alloying constituent fine setting under oxygen blast under vacuo, decarburization, vacuum stripping, vacuum, is mainly used in refining ultra low-carbon steel and electrical pure iron etc.; Under VD type ladle refining furnace can carry out general Fruit storage and vacuum to molten steel, alloying constituent is finely tuned.
The rolling technology of weldless steel tube is: circle base → sawing → heating → perforation → tube rolling → tension reducing → sampling → cooling → crop end → align → check → pack → weigh → warehouse-in.During its circle base perforation, temperature is 1250 ~ 1280 DEG C; During tube rolling, temperature is 1180 ~ 1220 DEG C; Determining to open temperature when subtracting is 820 ~ 860 DEG C.
Application Ф 159mmPQF unit rolling specs is the weldless steel tube of Φ 114mm × 4.8mm is example, and get six samples, each sample chemical composition is as shown in table 1 in batches.
Table 1 each sample composition (mass percent/%)
| Sample | C | Si | Mn | P | S | Cr | Mo | Al | Ni | Cu | Ti | Nb |
| Sample 1 | 0.14 | 0.27 | 0.58 | 0.012 | 0.006 | 0.021 | 0.005 | 0.023 | 0.009 | 0.006 | 0.032 | 0.0020 |
| Sample 2 | 0.12 | 0.21 | 0.55 | 0.012 | 0.007 | 0.020 | 0.006 | 0.028 | 0.012 | 0.008 | 0.033 | 0.0021 |
| Sample 3 | 0.12 | 0.23 | 0.55 | 0.013 | 0.006 | 0.022 | 0.006 | 0.020 | 0.010 | 0.007 | 0.031 | 0.0020 |
| Sample 4 | 0.11 | 0.22 | 0.54 | 0.010 | 0.005 | 0.021 | 0.005 | 0.020 | 0.011 | 0.008 | 0.030 | 0.0022 |
| Sample 5 | 0.10 | 0.17 | 0.60 | 0.010 | 0.005 | 0.022 | 0.005 | 0.020 | 0.009 | 0.006 | 0.02 | 0.001 |
| Sample 6 | 0.16 | 0.35 | 0.80 | 0.02 | 0.02 | 0.30 | 0.080 | 0.045 | 0.30 | 0.30 | 0.04 | 0.005 |
Pressure-bearing weldless steel tube thermal treatment process is: normalizing temperature is 880 ~ 940 DEG C, is incubated 20 ~ 40 minutes.
After above-mentioned four sample thermal treatments, microstructure examination result is as shown in table 2, and the mechanical property after thermal treatment is as shown in table 3, and mechanical behavior under high temperature is in table 4.
The metallographic structure of table 2 each sample
Note: P perlite in table, F is ferrite
Table 3 each sample mechanical property
Table 4 high-temperature yield strength
As can be found from Table 2, each example inclusion is tiny, be evenly distributed, and weave construction is suitable for, and crystal grain is tiny.As can be seen from Table 3, the material of each example has good strength, toughness and mechanical property, and as can be seen from Table 4, mechanical behavior under high temperature is good.With the weldless steel tube that it is prepared, there is good compressive strength and high thermal resistance.Properties meets the requirement of pressure-bearing weldless steel tube.
Claims (7)
1., containing a niobium pressure-bearing weldless steel tube, it is characterized in that, the mass percent of its material chemical composition is: C0.10 ~ 0.16, Si0.17 ~ 0.35, Mn0.54 ~ 0.80, Cr0.020 ~ 0.022, Mo≤0.08, P≤0.02, S≤0.02, Nb0.001 ~ 0.005, Al
tol0.02 ~ 0.045, Ti0.02 ~ 0.04, Ni≤0.3, Cu≤0.3; All the other are Fe, and each composition quality mark amounts to 100%.
2. as claimed in claim 1 containing niobium pressure-bearing weldless steel tube, it is characterized in that: the content of the content of C to be the content of 0.14, Si be 0.27, Mn is 0.58, the content of the content of Cr to be the content of 0.021, Mo be 0.005, P is 0.012, the content of S is the content of 0.006, Nb is 0.002, Al
tolthe content of content to be the content of 0.023, Ti be 0.032, Ni be the content of 0.009, Cu be 0.006.
3. as claimed in claim 1 containing niobium pressure-bearing weldless steel tube, it is characterized in that: the content of the content of C to be the content of 0.12, Si be 0.21, Mn is 0.55, the content of the content of Cr to be the content of 0.020, Mo be 0.006, P is 0.012, the content of S is the content of 0.007, Nb is 0.0021, Al
tolthe content of content to be the content of 0.028, Ti be 0.033, Ni be the content of 0.012, Cu be 0.008.
4. as claimed in claim 1 containing niobium pressure-bearing weldless steel tube, it is characterized in that: the content of the content of the content of the content of C to be the content of 0.12, Si be 0.23, Mn to be the content of 0.55, P be 0.013, S to be the content of 0.006, Cr be 0.022, Mo is 0.006, Al
tolthe content of the content of content to be the content of 0.020, Ni be 0.010, Cu to be the content of 0.007, Ti be 0.031, Nb be 0.0020.
5. as claimed in claim 1 containing niobium pressure-bearing weldless steel tube, it is characterized in that: the content of the content of the content of the content of C to be the content of 0.11, Si be 0.22, Mn to be the content of 0.54, P be 0.010, S to be the content of 0.005, Cr be 0.021, Mo is 0.005, Al
tolthe content of the content of content to be the content of 0.020, Ni be 0.011, Cu to be the content of 0.008, Ti be 0.030, Nb be 0.0022.
6. containing the preparation method of niobium pressure-bearing weldless steel tube, it is characterized in that: comprise steelmaking process, the operation of rolling of weldless steel tube and pressure-bearing weldless steel tube heat treatment process; 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; During its circle base perforation, temperature is 1250 ~ 1280 DEG C, and during tube rolling, temperature is 1180 ~ 1220 DEG C, and determining to open temperature when subtracting is 820 ~ 860 DEG C; Pressure-bearing is with in weldless steel tube heat treatment process, and normalizing temperature is 880 ~ 940 DEG C, is incubated 20 ~ 40 minutes; The mass percent of producing the chemical composition containing niobium pressure-bearing weldless steel tube obtained is C0.10 ~ 0.16, Si0.17 ~ 0.35, Mn0.60 ~ 0.80, Cr0.020 ~ 0.022, Mo≤0.08, P≤0.02, S≤0.02, Nb0.001 ~ 0.005, Al
tol0.02 ~ 0.045, Ti0.02 ~ 0.04, Ni≤0.3, Cu≤0.3, all the other are Fe, and each composition quality mark amounts to 100%.
7. the preparation method containing niobium pressure-bearing weldless steel tube as claimed in claim 6, it is characterized in that, steelmaking process comprises: the degassed and round billet continuous casting of molten iron converter smelting, LF refining, VD; Described converter smelting adopts 100 tons of top and bottom combined blown converters, adopt desulphurised hot metal, ferrosilicon and manganeseirom is adopted to carry out deoxidation alloying, single slag technique, finishing slag basicity controls by 3.0, and converter terminal Composition Control carbon is not less than 0.03%, and phosphorus is not more than 0.01%, liquid steel temperature controls more than 1600 DEG C, and tapping process adds lime block 100 ~ 300KG; LF refining adopts single refining to produce, and whole process, by the normal Argon of refining, carries out slag making desulfurization, molten steel heating and composition adjustment according to converter molten steel composition and temperature; VD vacuum tightness≤0.10KPa, dark vacuum time >=13min, feed silicon-calcium wire 150 meters after vacuum, carry out soft blow afterwards, the soft blow time is greater than 8 minutes; Continuous casting adopts induction stirring mode, and condensate depression Δ T≤30 DEG C, casting speed control is at the constant pulling rate of 1.0m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310093027.5A CN103147003B (en) | 2013-03-22 | 2013-03-22 | Containing niobium pressure-bearing weldless steel tube and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310093027.5A CN103147003B (en) | 2013-03-22 | 2013-03-22 | Containing niobium pressure-bearing weldless steel tube and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103147003A CN103147003A (en) | 2013-06-12 |
| CN103147003B true CN103147003B (en) | 2016-01-13 |
Family
ID=48545315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310093027.5A Active CN103147003B (en) | 2013-03-22 | 2013-03-22 | Containing niobium pressure-bearing weldless steel tube and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103147003B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103361561B (en) * | 2013-07-05 | 2015-08-26 | 内蒙古包钢钢联股份有限公司 | The preparation method of coupling material weldless steel tube |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1788103A (en) * | 2003-04-25 | 2006-06-14 | 墨西哥钢管股份有限公司 | Seamless steel tube which is intended to be used as a guide pipe and production method thereof |
-
2013
- 2013-03-22 CN CN201310093027.5A patent/CN103147003B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1788103A (en) * | 2003-04-25 | 2006-06-14 | 墨西哥钢管股份有限公司 | Seamless steel tube which is intended to be used as a guide pipe and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103147003A (en) | 2013-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103131963B (en) | The low temperature preparation method of weldless steel tube material | |
| CN106661705B (en) | carburized alloy steel and preparation method and application thereof | |
| CN103160729B (en) | Medium-carbon microalloyed steel for engineering machinery caterpillar chain piece and production process thereof | |
| CN103131952B (en) | Containing the anti-CO of rare earth 2the preparation method of economical sleeve pipe | |
| CN103422033B (en) | A kind of low temperature Deformed Steel Bars and production technique thereof | |
| CN109797339A (en) | A kind of tensile strength >=960MP martensite Micro Alloying high-strength steel and its manufacturing method | |
| CN107058905B (en) | A kind of super austenitic stainless steel and preparation method thereof | |
| CN103361561B (en) | The preparation method of coupling material weldless steel tube | |
| CN103317256A (en) | Austenitic stainless steel submerged-arc welding wire with excellent high-temperature strength | |
| CN103160733A (en) | Steel plate for nuclear power station pressure vessel and equipment gate, and manufacturing method thereof | |
| CN103276310A (en) | Rare-earth-containing H-shaped steel with low-temperature toughness and production method thereof | |
| CN103436808A (en) | Low-carbon equivalent high strength and toughness cast steel and preparation method thereof | |
| US20230265547A1 (en) | Nickel-Based Superalloy Steel And Preparation Method Thereof | |
| CN101768701A (en) | Nickel heat-resistance stainless steel and manufacturing method thereof | |
| CN103469051A (en) | Duplex stainless steel master alloy and preparation method thereof | |
| CN113046512A (en) | Method for producing high-end rare earth bearing steel pipe in whole process | |
| CN105177408A (en) | Low-cost hot-rolled thin strip steel containing boron and manufacturing method thereof | |
| CN103131950A (en) | Rear-earth-containing seamless steel tube material for high-pressure fertilizer and preparation method thereof | |
| CN109680115A (en) | A kind of deoxidation and microalloying method for molten steel | |
| CN102965589B (en) | Mechanical expanding machine pull rod shaft with high fatigue strength and preparation method thereof | |
| CN109055859A (en) | A kind of industrial robot joint flexbile gear high intensity RL40 steel and preparation method | |
| CN103194683A (en) | Seamless steel tube material for rear earth-containing oil well pipe coupling material and preparation method of seamless steel tube material | |
| CN107779787A (en) | Z2CN19 10NS Nuclear pipings austenitic stainless steels and steel ingot production method | |
| CN103147003B (en) | Containing niobium pressure-bearing weldless steel tube and preparation method thereof | |
| CN106282825A (en) | A kind of high-speed bearing steel and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |