CN105385946A - Production method for seamless steel pipe steel at low temperature of minus 100 DEG C - Google Patents
Production method for seamless steel pipe steel at low temperature of minus 100 DEG C Download PDFInfo
- Publication number
- CN105385946A CN105385946A CN201510881757.0A CN201510881757A CN105385946A CN 105385946 A CN105385946 A CN 105385946A CN 201510881757 A CN201510881757 A CN 201510881757A CN 105385946 A CN105385946 A CN 105385946A
- Authority
- CN
- China
- Prior art keywords
- steel
- production method
- low temperature
- molten steel
- tapping
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a production method for seamless steel pipe steel at the low temperature of minus 100 DEG C. The production method comprises the steps that firstly, an ultrahigh electric arc furnace is used for smelting, the end point carbon of molten steel is controlled to be smaller than or equal to 0.04%, and the end point phosphorus is controlled to be smaller than or equal to 0.003%; in the steel tapping process, Al balls and CaBaAlSi composite deoxidizing agents are added for deoxygenation; then low-frequency (LF) refinement is conducted, air-isolated operation is conducted through a large amount of slag, the inclusion morphology is changed through Ca line treatment, and vacuum distillation (VD) vacuum treatment is conducted; and finally protective casting is conducted on round billets through a round bloom caster, pipe rolling is conducted directly, and low-temperature seamless steel pipes are obtained. According to the seamless steel pipe steel at the low temperature of minus 100 DEG C produced through the production method, the steel purity is high, the gas content is low, the content of harmful elements of P and S is low, the production process is short, the cost is low, the market competitiveness is high, and the production method can be widely applied and popularized.
Description
Technical field
Embodiments of the present invention relate to field of metallurgy, and more specifically, embodiments of the present invention relate to a kind of production method of-100 DEG C of low temperature weldless steel tube steel.
Background technology
Along with China's rapid development of economy, domestic petroleum, chemical industry equal energy source industry need a large amount of Cryogenic Steel to manufacture various liquefied petroleum gas (LPG), liquefied ammonia, liquid oxygen, the production of liquid nitrogen and storing device.According to China " 12 " planning, the coming five years will optimize the development of fossil energy, accelerates the exploitation of hydrocarbon resources.This provides wide market and opportunity to develop by Energy production under low temperature service condition and storing device manufacturing, also can promote the development of low temperature material simultaneously.Due to container special purpose, stricter to the requirement of low-temperature steel performance, first the ability at service temperatures with enough anti-brittle crackings will be ensured, require that product not only has high intensity, but also high low-temperature impact toughness will be possessed, therefore cryotron requires very high to purity of steel, and requires higher to the purity of steel along with the reduction of temperature.
CN103131963 patent of invention proposes low temperature weldless steel tube material and preparation method thereof, steel smelting process for production is: hot metal pretreatment → converter smelting → LF refining → VD is degassed → and round billet continuous casting, the method adopts the long flow process line of converter to produce, dark desulfurization pre-treatment has been carried out to molten iron, ensure purity of steel, production cycle is long, and cost is high, and competitive power is poor; And the harmful element P content that the method is produced is high, all more than 0.013%, is unfavorable for the low-temperature impact toughness of product; Feed silicon-calcium wire after VD vacuum, in steel, nodule particle is tiny and many, is not easy to float to remove, and has a strong impact on the low temperature impact properties of product.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, provide a kind of production method of-100 DEG C of low temperature weldless steel tube steel, to expect solving existing-100 DEG C, the low-temperature steel production cycle is long, cost is high, competitive power is poor, harmful element is high, and inclusion particle is many, the problem that low-temperature impact toughness is low.
For solving above-mentioned technical problem, one embodiment of the present invention by the following technical solutions:
A production method for-100 DEG C of low temperature weldless steel tube steel, comprises the following steps:
(1) electric arc furnace smelting
With steel scrap and the pig iron for raw material, adopt high resistance ultra-high power electric arc furnace to smelt just to make steel water, control just steel-making water end point carbon≤0.04% and phosphorus≤0.003%; Add Ni plate before tapping to carry out toasting with ladle the hydrogen richness of molten steel is reduced; Tapping, adds Al ball respectively to first steel-making water in this process and CaBaAlSi composite deoxidant carries out deoxidation;
(2) LF refining
When step (1) gained molten steel is proceeded to LF refining furnace, the lime of direct employing 80 ~ 90% and the synthetic slag mixing making foamed slag of 10 ~ 20%, large quantity of slag air-isolation is adopted to operate, the quantity of slag accounts for 1.2 ~ 1.8% of Metal Weight, makes the ladle of described LF refining furnace and electrode to the carbon increasing amount < 0.03% of molten steel; After refining terminates, feed pure Ca line, become spherical by the inclusion in molten steel according to the addition wire feeder of 0.10 ~ 0.18kg/t steel to molten steel, then adopt ladle bottom blowing argon gas to blow more than 15min to molten steel is quiet, Argon intensity makes molten steel not exposed;
(3) VD vacuum-treat
Step (2) gained molten steel is proceeded to VD vacuum oven vacuumize, keep being greater than 15min at vacuum tightness < 67Pa, until stop when in molten steel, slag no longer foams vacuumizing, open the vacuum cover of VD vacuum oven, utilize ladle bottom blowing argon gas to be greater than 18min to quiet the blowing of molten steel;
(4) round billet continuous casting
Step (3) gained molten steel is adopted round billet continuous casting machine casting, obtain circle base, be directly used in tube rolling, obtain low temperature weldless steel tube.
The production method of above-mentioned-100 DEG C of low temperature weldless steel tube steel, described raw material comprises the steel scrap of 55 ~ 65% and the pig iron of 35 ~ 45%.
The production method of above-mentioned-100 DEG C of low temperature weldless steel tube steel, the described concrete grammar that molten steel hydrogen richness is reduced is: before arc furnace tapping, Ni plate joins in the ladle of described electric arc furnace according to the addition of 25 ~ 28kg/t steel by 2h, toast with ladle, storing temperature > 800 DEG C.
The production method of above-mentioned-100 DEG C of low temperature weldless steel tube steel, the described tapping of step (1) adopts eccentric bottom tapping, the tapping temperature of electric arc furnace is 1630 ~ 1650 DEG C, and the addition of described Al ball and CaBaAlSi composite deoxidant is respectively 3.3 ~ 3.8kg/t steel, 2.0 ~ 2.5kg/t steel.
The production method of above-mentioned-100 DEG C of low temperature weldless steel tube steel, described high resistance ultra-high power electric arc furnace is 70 tons of high resistance ultra high powers.
The production method of above-mentioned-100 DEG C of low temperature weldless steel tube steel, the specification of described round base is Φ 200mm ~ Φ 430mm, the gas content of described round base is: H0.00004 ~ 0.00007%, O0.0012 ~ 0.0018%, N0.0030 ~ 0.0050%, harmful element P0.005 ~ 0.008%, S0.001 ~ 0.004%.
The production method of above-mentioned-100 DEG C of low temperature weldless steel tube steel, the chemical composition of described low temperature weldless steel tube by weight content is counted: C0.06 ~ 0.10%, Si0.21 ~ 0.33%, Mn0.48 ~ 0.58%, P≤0.008%, S≤0.004%, Ni3.4 ~ 3.7%, Al0.03 ~ 0.06%, surplus are iron and inevitable impurity.
Below technical scheme of the present invention is further detailed.
First water of making steel smelted by the present invention's high resistance ultra-high power electric arc furnace, utilize the characteristics such as the vigorous stirring of ultra-high power electric arc furnace high alkalinity, low temperature, high oxidation iron and furnace wall coherent oxygen lance oxygen decarburization, effectively remove harmful element phosphorus, hydrogen, oxide gas and non-metallic inclusion in molten steel.
Add Al ball and composite fluxing medium carries out deoxidation to molten steel jointly in arc furnace tapping process, allow the Al that just steel-making water is formed
2o
3inclusion has sufficient floating interval of floating dock, ensures that the Al content of tube blank steel after LF refining, VD vacuum-treat, continuous casting reaches 0.030 ~ 0.060% simultaneously, avoids the Al adding Al oxidation formation in LF refining process simultaneously
2o
3inclusion does not have sufficient floating interval of floating dock, increases the rear nodule content of Ca process.
Electric arc furnace is just made steel before water is tapped and is added Ni plate in ladle, can remove the hydrogen richness in Ni plate, reduce molten steel hydrogen richness.Step (1) requires the carbon content and the phosphorus content that control just steel-making water terminal, if carbon content is higher than 0.04%, can not ensure that the low-temperature steel carbon content finally obtained reaches the requirement of 0.06 ~ 0.10%, but in order to avoid Molten Steel over-oxidation, electric arc furnace furnace wall coherent oxygen lance oxygen blast intensity must be controlled, to control carbon content of molten steel lower than 0.04%.If phosphorus is greater than 0.003%, the rephosphorization of the phosphorus bearing slag taken out of because of arc furnace tapping molten steel when LF refining and add the phosphorus that iron alloy increases, can make the phosphorus content of product more than 0.008%, increase harmful element content, affect the low-temperature flexibility of steel.Arc furnace tapping temperature 1630 ~ 1650 DEG C, adopts eccentric bottom tapping (EBT), prevents electric arc furnace oxidation sludge from entering LF refining furnace.
The present invention is when molten steel is to LF refining furnace station, do not add Al deoxidation, the graphite carbon that when adopting the operation of the large quantity of slag can prevent LF refining furnace from heating, anodizing comes off enters molten steel increases carbon content in steel, prevent the carbon of the magnesia carbon brick ladle slag line of carbon containing 17 ~ 20% from entering in molten steel, control LF refining process ladle and electrode molten steel recarburization amount are less than 0.03%, ensure that products C content meets the requirement of 0.06 ~ 0.10%; Adopt large quantity of slag air-isolation, prevent molten steel air-breathing and secondary oxidation.Realize the desulfurization rapidly of LF refining, deoxidation, degas, go to be mingled with, adjustment alloying constituent.
After LF refining terminates, feed pure Ca line with wire feeder and denaturing treatment is carried out to the inclusion in molten steel, make the inclusion modification in molten steel be spherical.Ladle bottom blowing more than argon gas 15min, allows the nodule in molten steel have sufficient floating interval of floating dock, improves purity of steel, reduces nodule to the impact of low-temperature impact toughness.If the pure Ca line of feeding is less than 0.10Kg/t steel, then can not make the complete sex change of inclusion, the pure Ca line amount of feeding is greater than 0.18Kg/t steel, one is increase cost, two be feed pure Ca line amount large time molten steel boiling violent, steel liquid fluctuating causes greatly molten steel air-breathing, produces secondary oxidation.
In VD vacuum processing step, the object of ladle bottom blowing argon gas allows inclusion after vacuum-treat float further, improves purity of steel.
Adopt whole process protection casting during round billet continuous casting, solve molten steel air-breathing and secondary oxidation of steel problem.Large Copacity tundish (such as, capacity is 20 tons) is adopted to allow inclusion fully float.
The invention solves low-temperature steel Gr.3 need of production and dark desulfurization pre-treatment is carried out to molten iron, Production Flow Chart is long, cost is high, competitive power is poor, the harmful element phosphorus content affecting low-temperature impact toughness is high, the difficult problem that inclusion is many, a kind of production method of-100 DEG C of low temperature weldless steel tube Gr.3 tube blank steels is provided, adopt ultra-high power electric arc furnace, eccentric bottom tapping, LF external refining, VD vacuum-treat, the low temperature seamless steel tube blank steel purity of steel that full guard round billet continuous casting is produced is high, gas content is low, harmful element P, S content is low, Production Flow Chart is simple, flow process is short, cost is low, can produce in batches, thus applied widely.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The technological process of production of the present invention is as follows:
High resistance ultra-high power electric arc furnace smelting → LF refining → VD vacuum-treat → round billet continuous casting → tube rolling.Concrete steps are:
(1) electric arc furnace adopts steel scrap and the pig iron to make raw material, and wherein, steel scrap accounts for 55 ~ 65wt%, and the pig iron accounts for 35 ~ 45wt%, with 70 tons of high resistance ultra-high power electric arc furnace smelting molten steels.Control electric arc furnace molten steel end point carbon≤0.04% and phosphorus≤0.003%, in arc furnace tapping process, add Al ball 3.3 ~ 3.8kg/t steel, CaBaAlSi composite deoxidant 2.0 ~ 2.5kg/t steel carries out pre-deoxidation, the Ni plate of 25 ~ 28kg/t steel is added in ladle before arc furnace tapping, toast with ladle, storing temperature is greater than 800 DEG C, removes the hydrogen richness in Ni plate.Arc furnace tapping temperature 1630 ~ 1650 DEG C, adopts eccentric bottom tapping (EBT).
(2) when molten steel is to LF refining furnace station, do not add Al deoxidation, adopt lime and 10 ~ 20% synthetic slag mixing making foamed slags of 80 ~ 90%, the large quantity of slag is adopted to operate, the quantity of slag accounts for 1.2 ~ 1.8% of Metal Weight, desulfurization rapidly, deoxidation, degas, go to be mingled with, the alloying constituent that adjustment steel grade needs.After LF refining terminates, with the pure Ca line of wire feeder feeding 0.10 ~ 0.20kg/t steel, denaturing treatment is carried out to inclusion, make the inclusion modification in molten steel be spherical.After Ca process, adopt ladle bottom blowing argon gas to carry out quiet blowing to molten steel, quietly blow time more than 15min, Argon intensity makes molten steel not exposed.The temperature of tapping is 1640 ~ 1660 DEG C.
(3) LF refined molten steel is delivered to VD station to carry out vacuumizing process, be less than the condition of 67Pa in vacuum tightness under, the hold-time is greater than 15min, until stop when slag no longer foams vacuumizing, open vacuum cover, utilize steel ladle bottom argon blowing to carry out quiet blowing to molten steel, the quiet time of blowing is greater than 18min.
(4) adopt round billet continuous casting machine to be cast into Φ 200mm ~ Φ 430mm specification, in casting process, adopt whole process protection casting, solve molten steel air-breathing and secondary oxidation of steel problem.Large Copacity tundish (such as, capacity is 20 tons) is adopted to allow inclusion fully float.The continuous cast round billets be cast into, is directly used in tube rolling.The chemical composition of gained weldless steel tube by weight content is counted: C0.06 ~ 0.10%, Si0.21 ~ 0.33%, Mn0.48 ~ 0.58%, P≤0.008%, S≤0.004%, Ni3.4 ~ 3.7%, Al0.03 ~ 0.06%, surplus are iron and inevitable impurity.
Embodiment 1 ~ 3 adopts aforesaid method, and produces seamless steel tube blank according to the data implementation method in table 1.Each embodiment gained tube blank steel harmful element and gas examination the results are shown in Table 2, and non-metallic inclusion is in table 3.
The service data of table 1 embodiment 1 to embodiment 3
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Steel scrap, pig iron weight ratio | 60％、40％ | 55％、45％ | 65％、35％ |
| Al ball consumption | 3.3kg/t steel | 3.5kg/t steel | 3.8kg/t steel |
| CaBaAlSi consumption | 2.5kg/t steel | 2.3kg/t steel | 2.0kg/t steel |
| Ni plate consumption | 26kg/t steel | 28kg/t steel | 25kg/t steel |
| Lime/synthetic slag | 80％、20％ | 85％、15％ | 90％、10％ |
| The LF quantity of slag | 1.8％ | 1.5％ | 1.2％ |
| Pure Ca line amount | 0.18kg/t steel | 0.15kg/t steel | 0.10kg/t steel |
| Circle base diameter | 200mm | 280mm | 430mm |
Table 2 tube blank steel harmful element and gas examination result
| Embodiment | P％ | S％ | H％ | O％ | N％ |
| 1 | 0.005 | 0.004 | 0.00004 | 0.0014 | 0.0030 |
| 2 | 0.006 | 0.001 | 0.00005 | 0.0012 | 0.0041 |
| 3 | 0.008 | 0.002 | 0.00007 | 0.0018 | 0.0050 |
Table 3 tube blank steel examination of nonmetallic inclusion result
From table 2, table 3 gas and inclusion assay,-100 DEG C of low temperature seamless steel tube blank steel Gr.3 hydrogen richnesss adopting the present invention to produce are not more than 0.00007%, oxygen level is not more than 0.0018%, nitrogen content is not more than 0.0050%, harmful element P content is not more than 0.008%, S content is not more than 0.004%, inclusion category-A is not more than 0.5 grade, category-B is not more than 0.5 grade, C class is not more than 0.5 grade, D class is not more than 1.0 grades, meets the metallurgical quality requirement of-100 DEG C of low temperature seamless steel tube blank steel high cleanlinesses completely.
Although with reference to explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in scope disclosed in the present application, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (8)
1. a production method for-100 DEG C of low temperature weldless steel tube steel, is characterized in that comprising the following steps:
(1) electric arc furnace smelting
With steel scrap and the pig iron for raw material, adopt high resistance ultra-high power electric arc furnace to smelt just to make steel water, control just steel-making water end point carbon≤0.04% and phosphorus≤0.003%; Add Ni plate before tapping to carry out toasting with ladle the hydrogen richness of molten steel is reduced; Tapping, adds Al ball respectively to first steel-making water in this process and CaBaAlSi composite deoxidant carries out deoxidation;
(2) LF refining
When step (1) gained molten steel is proceeded to LF refining furnace, the lime of direct employing 80 ~ 90% and the synthetic slag mixing making foamed slag of 10 ~ 20%, large quantity of slag air-isolation is adopted to operate, the quantity of slag accounts for 1.2 ~ 1.8% of Metal Weight, makes the ladle of described LF refining furnace and electrode to the carbon increasing amount < 0.03% of molten steel; After refining terminates, feed pure Ca line according to the addition wire feeder of 0.10 ~ 0.18kg/t steel to molten steel, the inclusion in molten steel is become spherical, then adopt ladle bottom blowing argon gas to blow more than 15min to molten steel is quiet, Argon intensity makes molten steel not exposed, tapping;
(3) VD vacuum-treat
Step (2) gained molten steel is proceeded to VD vacuum oven vacuumize, keep being greater than 15min at vacuum tightness < 67Pa, until stop when in molten steel, slag no longer foams vacuumizing, open the vacuum cover of VD vacuum oven, utilize ladle bottom blowing argon gas to be greater than 18min to quiet the blowing of molten steel;
(4) round billet continuous casting
Step (3) gained molten steel is adopted round billet continuous casting machine casting, obtain circle base, be directly used in tube rolling, obtain low temperature weldless steel tube.
2. the production method of-100 DEG C of low temperature weldless steel tube steel according to claim 1, is characterized in that described raw material comprises the steel scrap of 55 ~ 65% and the pig iron of 35 ~ 45%.
3. the production method of-100 DEG C of low temperature weldless steel tube steel according to claim 1, the concrete grammar making molten steel hydrogen richness reduce described in it is characterized in that is: before tapping, Ni plate joins in the ladle of described electric arc furnace according to the addition of 25 ~ 28kg/t steel by 2h, toast with ladle, storing temperature > 800 DEG C.
4. the production method of-100 DEG C of low temperature weldless steel tube steel according to claim 1, it is characterized in that the described tapping of step (1) adopts eccentric bottom tapping, the tapping temperature of electric arc furnace is 1630 ~ 1650 DEG C, and the addition of described Al ball and CaBaAlSi composite deoxidant is respectively 3.3 ~ 3.8kg/t steel, 2.0 ~ 2.5kg/t steel.
5. the production method of-100 DEG C of low temperature weldless steel tube steel according to claim 1, is characterized in that described high resistance ultra-high power electric arc furnace is 70 tons of high resistance ultra high powers.
6. the production method of-100 DEG C of low temperature weldless steel tube steel according to claim 1, is characterized in that the temperature of step (2) described tapping is 1640 ~ 1660 DEG C.
7. the production method of-100 DEG C of low temperature weldless steel tube steel according to claim 1, it is characterized in that the specification of described round base is Φ 200mm ~ Φ 430mm, the gas content of circle base is: H0.00004 ~ 0.00007%, O0.0012 ~ 0.0018%, N0.0030 ~ 0.0050%, harmful element P0.005 ~ 0.008%, S0.001 ~ 0.004%.
8. the production method of-100 DEG C of low temperature weldless steel tube steel according to claim 1, the chemical composition that it is characterized in that described low temperature weldless steel tube by weight content is counted: C0.06 ~ 0.10%, Si0.21 ~ 0.33%, Mn0.48 ~ 0.58%, P≤0.008%, S≤0.004%, Ni3.4 ~ 3.7%, Al0.03 ~ 0.06%, surplus are iron and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510881757.0A CN105385946B (en) | 2015-12-03 | 2015-12-03 | The production method of 100 DEG C of low temperature seamless steel pipe steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510881757.0A CN105385946B (en) | 2015-12-03 | 2015-12-03 | The production method of 100 DEG C of low temperature seamless steel pipe steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105385946A true CN105385946A (en) | 2016-03-09 |
| CN105385946B CN105385946B (en) | 2017-08-29 |
Family
ID=55418711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510881757.0A Active CN105385946B (en) | 2015-12-03 | 2015-12-03 | The production method of 100 DEG C of low temperature seamless steel pipe steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105385946B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191375A (en) * | 2016-08-23 | 2016-12-07 | 浙江青山钢铁有限公司 | Seamless steel pipe titanium-containing austenitic stainless steel circular pipe blank continuous casting producing method |
| CN107058675A (en) * | 2017-03-29 | 2017-08-18 | 辽宁工业大学 | A kind of Industrial Process Control Methods of multivariable |
| CN109504815A (en) * | 2018-11-16 | 2019-03-22 | 山东寿光巨能特钢有限公司 | A method of control large-sized annular forging low-alloy high-strength steel large round billet center porosity |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1807955A (en) * | 2006-01-20 | 2006-07-26 | 天津商学院 | High alloy steel seamless steel pipe and production method thereof |
| CN101643882A (en) * | 2009-08-20 | 2010-02-10 | 朝阳西姆莱斯石油铸钢管件有限公司 | Clean steel smelting method of anti-S steel oil well pipe |
| CN103131963A (en) * | 2013-03-22 | 2013-06-05 | 内蒙古包钢钢联股份有限公司 | Low-temperature seamless steel pipe material and preparation method thereof |
-
2015
- 2015-12-03 CN CN201510881757.0A patent/CN105385946B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1807955A (en) * | 2006-01-20 | 2006-07-26 | 天津商学院 | High alloy steel seamless steel pipe and production method thereof |
| CN101643882A (en) * | 2009-08-20 | 2010-02-10 | 朝阳西姆莱斯石油铸钢管件有限公司 | Clean steel smelting method of anti-S steel oil well pipe |
| CN103131963A (en) * | 2013-03-22 | 2013-06-05 | 内蒙古包钢钢联股份有限公司 | Low-temperature seamless steel pipe material and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191375A (en) * | 2016-08-23 | 2016-12-07 | 浙江青山钢铁有限公司 | Seamless steel pipe titanium-containing austenitic stainless steel circular pipe blank continuous casting producing method |
| CN106191375B (en) * | 2016-08-23 | 2018-04-24 | 浙江青山钢铁有限公司 | Seamless steel pipe titanium-containing austenitic stainless steel circular pipe blank continuous casting producing method |
| CN107058675A (en) * | 2017-03-29 | 2017-08-18 | 辽宁工业大学 | A kind of Industrial Process Control Methods of multivariable |
| CN109504815A (en) * | 2018-11-16 | 2019-03-22 | 山东寿光巨能特钢有限公司 | A method of control large-sized annular forging low-alloy high-strength steel large round billet center porosity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105385946B (en) | 2017-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103422033B (en) | A kind of low temperature Deformed Steel Bars and production technique thereof | |
| CN104630418A (en) | High-cleanliness pipeline steel smelting process | |
| CN100557038C (en) | The smelting process of a kind of super-purity ferrite stainless steel decarburization, denitrogenation | |
| CN104831153B (en) | The preparation method of V150 grade of steel high-strength tenacity casing steels | |
| CN103627973B (en) | A kind of production method of low-carbon high-chromium steel | |
| CN103320718B (en) | The production method of 316LN nuclear power austenitic stainless steel | |
| CN103131963A (en) | Low-temperature seamless steel pipe material and preparation method thereof | |
| CN101993974B (en) | Method for preparing pure iron with extremely low gas content | |
| CN102586547B (en) | Production method for low-cost clean steel | |
| CN104264053B (en) | The neodymium iron boron production method of pure iron as raw material bar | |
| CN104451385A (en) | Low-carbon low-nitrogen and high-oxygen industrial pure iron and production method thereof | |
| CN105537549A (en) | Production method of continuous casting round billet of seamless steel tube steel at low temperature of minus 100 DEG C | |
| CN105603158B (en) | A kind of method for controlling ultra-low carbon baking hardening steel dissolved carbon content | |
| CN105385946A (en) | Production method for seamless steel pipe steel at low temperature of minus 100 DEG C | |
| CN102676744A (en) | Technique for refined production of antiacid pipeline steel through VD-LF-VD | |
| CN109234622B (en) | X80M deep-sea strain-resistant pipeline steel and smelting process | |
| CN105177408A (en) | Low-cost hot-rolled thin strip steel containing boron and manufacturing method thereof | |
| CN103194683A (en) | Seamless steel tube material for rear earth-containing oil well pipe coupling material and preparation method of seamless steel tube material | |
| CN105483504B (en) | The production method of -195 DEG C of ultralow temperature seamless steel tube blank steel | |
| CN111304404B (en) | Cored wire for oxide metallurgy of vacuum induction furnace and use method | |
| CN102965589B (en) | Mechanical expanding machine pull rod shaft with high fatigue strength and preparation method thereof | |
| CN102534095A (en) | Smelting process for super clean pipeline steel | |
| CN102719728A (en) | Technique for producing anti-acid pipeline steel by RH-LF-VD refining | |
| CN102719614A (en) | Process for producing anti-acid pipeline steel by Ruhrstahl Heraecus (RH)-ladle furnace (LF)-RH refining | |
| CN105506473B (en) | 100 DEG C of low temperature seamless steel pipes and its production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |