CN101665891A - Stainless heat-resistant alloy steel seamless steel tube and preparation method thereof - Google Patents
Stainless heat-resistant alloy steel seamless steel tube and preparation method thereof Download PDFInfo
- Publication number
- CN101665891A CN101665891A CN200910101878A CN200910101878A CN101665891A CN 101665891 A CN101665891 A CN 101665891A CN 200910101878 A CN200910101878 A CN 200910101878A CN 200910101878 A CN200910101878 A CN 200910101878A CN 101665891 A CN101665891 A CN 101665891A
- Authority
- CN
- China
- Prior art keywords
- resistant alloy
- seamless steel
- alloy steel
- steel tube
- temperature
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to a stainless heat-resistant alloy steel seamless steel tube and a preparation method thereof. The seamless steel tube comprises the following chemical compositions by weight percent: 0.04-0.10% of C, 0.75% or less of Si, 2.00% or less of Mn, 0.03% or less of P, 0.03% or less of S, 17.00-23.00% of Ni, 24.00-26.00% of Cr, 0.20-0.60% of Nb+Ta, 0.15-0.35% of N and the balance Fe and inevitable trace elements. The preparation method of the invention adopts hot extrusion and cold rolling, computer automatic control solution heat treatment and other advanced technologies. Theproduct of the invention has excellent mechanical performance, high temperature resistant and corrosion resistance and various technical indexes of the product all meet or exceed Chinese relevant technical standards, thus successfully providing a new kind of qualified tube for the ultra supercritical power station boiler.
Description
Technical field
The present invention relates to a kind of alloy steel pipe and production method thereof.
Background technology
Ultra supercritical station boiler pipe is a kind of high performance alloys steel pipe, and it must possess the performance of mechanical behavior under high temperature, creep rupture strength and high temperature resistance flue gas corrosion, high temperature resistance carbonated drink dielectric corrosion, also should possess good welding and process industrial art performance simultaneously.At present, China still can not produce with pipe for this high performance boiler, can only rely on import, and inlet pipe not only costs an arm and a leg, and inadequate resource, and it is untimely to supply, thereby has seriously restricted the production and the development of China's ultra supercritical station boiler.
Summary of the invention
Purpose of the present invention provides a kind of be particularly suitable for ultra supercritical station boiler stainless heat-resistant alloy steel seamless steel tube and production method thereof.
Technical solution of the present invention is: a kind of stainless heat-resistant alloy steel seamless steel tube, its Chemical Composition is by weight percentage: C 0.04～0.10, Si≤0.75, Mn≤2.00, P≤0.03, S≤0.03, Ni 17.00～23.00, and Cr 24.00～26.00, and Nb+Ta 0.20～0.60, N 0.15～0.35, and surplus is Fe and inevitably micro-.
The normal temperature mechanical property technical indicator of described stainless heat-resistant alloy steel seamless steel tube is: yield strength 〉=295MPa, tensile strength 〉=655MPa, unit elongation A% 〉=30, hardness≤256HB/100HRB; Metallographic structure is an austenite; Grain fineness number is 4～7 grades.
The production method of described stainless heat-resistant alloy steel seamless steel tube comprises following processing step:
The heating of pipe bar → examination → aligning → crop end → peeling → segmentation → boring → end face processing → reconditioning → cleaning → preheating → once → lubricated → reaming → second-heating → lubricate → be squeezed into female pipe → hardening → aligning → sawing → pickling → inspection → cold rolling → deoil → solution heat treatment → aligning → sawing → pickling → nondestructive testing → finishing reconditioning → finished product packing is put in storage.
Described bar is that the Chemical Composition that adopts " electric furnace+external refining " production technique to reach described stainless heat-resistant alloy steel seamless steel tube requires.
Described preheating temperature is 800～850 ℃.
The described once temperature of heating is that the reaming temperature is controlled to be 1180～1200 ℃.
The temperature that the temperature of described second-heating promptly is squeezed into female pipe is controlled to be 1200～1220 ℃.
Described cold rolling be to adopt one roughing to add two passage cold-rolling process of one finish rolling.
The temperature of described solution heat treatment: the semifinished tube of roughing system is controlled to be 1100～1150 ℃, and the production tube after the finish rolling is controlled to be 1180～1250 ℃.
The invention has the beneficial effects as follows: successfully for the ultra supercritical station boiler provides a kind of qualified new variety with managing, its every technical indicator all meets or exceeds the regulation of national relevant technologies standard.The outstanding advantage of the inventive method is: the pipe bar that, has adopted " electric furnace+external refining " production technique to produce has guaranteed that product chemistry ingredient stability is qualified; Two, adopted hot extrusion+cold rolling weldless steel tube moulding advanced technologies, earlier with hot reaming and the female pipe of twice deformation process explained hereafter of hot extrusion, has three-dimensional compressive stress, the advantage of aximal deformation value, improved the compactness of pipe metal, refinement crystal grain, reduced each to performance difference, and wherein pipe is held in both hands and is expected to add thermal recovery " preheating+high temperature section rapid heating " technology, guaranteed that the pipe low-temperature prewarming is even, secondary pollution when preventing high temperature, reduce the pipe surface oxidation, adopted one roughing to add two passage cold-rolling process of one finish rolling then, guaranteed that moulding tube-surface quality is good, dimensional precision height and high comprehensive performance; Three, in the steel pipe solution heat treatment technology, heating fuel adopts the Sweet natural gas of cleaning, can effectively prevent the pollution of steel pipe harmful elements such as S, P when high temperature, combustion system adopts the high combustion rate burner burning, the furnace atmosphere good fluidity, the temperature field boundary is even, and adopts computer controlled automatic to comprise the processing parameters such as furnace roller speed, furnace atmosphere ratio of combustion and cooling injection flow rate of Heating temperature, regulation and control heating and soaking time, makes steel pipe solution heat treatment technological process accurate, stable, reliable.
Description of drawings
Fig. 1 is that the high temperature, short time tensile strength of this product steel pipe (φ 63.4 * 12) varies with temperature graphic representation.
Fig. 2 is 700 ℃ of high-temperature and durable graphic representations of this product steel pipe.
Embodiment
The invention will be further described with embodiment below.
A kind ofly be particularly suitable for ultra supercritical station boiler stainless heat-resistant alloy steel seamless steel tube, the pipe bar that is adopted is Ф 210mm, and its Chemical Composition is by weight percentage: C 0.04～0.10, Si≤0.75, Mn≤2.00, P≤0.03, S≤0.03, Ni 17.00～23.00, Cr 24.00～26.00, Nb+Ta0.20～0.60, N 0.15～0.35, and surplus is Fe and inevitably micro-.
The production method of described stainless heat-resistant alloy steel seamless steel tube comprises following processing step:
The heating of pipe bar → examination → aligning → crop end → peeling → segmentation → boring → end face processing → reconditioning → cleaning → preheating → once → lubricated → reaming → second-heating → lubricate → be squeezed into female pipe → hardening → aligning → sawing → pickling → inspection → slightly cold rolling → deoil → solution heat treatment → aligning → sawing → pickling → inspection → pinch pass → deoil → solution heat treatment → aligning → sawing → pickling → nondestructive testing → finishing reconditioning → finished product packing is put in storage.
Wherein:
The peeling operation is by long material peeling machine peeling to be carried out on pipe bar surface, pricks defectives such as trace and crack with oxide skin, the forging of eliminating pipe bar surface, and pipe bar diameter tolerance is 204 ± 0.5mm after the peeling, surfaceness≤1.6 μ m.
The pipe bar through boring processing before the extruding adds thermal recovery syllogic heating process, i.e. preheating, once heating, second-heating.Preheating is to carry out full and uniform low-temperature heat in the ring furnace that is medium with the Sweet natural gas, and temperature is controlled at 800～850 ℃, and the time is 120～180 minutes, and purpose is the secondary pollution that prevents when high temperature, reduces the oxidation on pipe surface; Once heating is the pipe bar after the preheating to be sent into controlled line frequency induction furnace be heated rapidly to the reaming temperature, promptly 1180～1200 ℃, delivers to staving press then and adopts glass lubricant to carry out reaming and get the uniform hollow billet of wall thickness; Second-heating is the reaming hollow billet to be sent into controlled line frequency induction furnace be heated rapidly to extrusion temperature, promptly 1200～1220 ℃, and be sent to 3500 tons of extruding units immediately and be squeezed into female pipe, extrusion lubricant adopts glass lubricant.The female pipe of present embodiment moulding specification is Ф 108 * 17mm and Ф 108 * 9mm.
Cold rolling process, female pipe is after hardening cooling, aligning, pickling, adopt one roughing to add two passage cold-rolling process of one finish rolling, make the semifinished tube of Ф 89 * 14.75mm and Ф 89 * 6.5mm through roughing, the production tube of Ф 63.4 * 12mm and Ф 60 * 4mm is made in finish rolling again.
The solution heat treatment operation, with the semifinished tube surface of roughing system deoil handle after, send into and carry out solution heat treatment in the roller bottom type continuous heat treating furnace, thermal treatment temp is controlled to be 1100～1150 ℃, soaking time 20～40 minutes; And the production tube solution heat treatment temperature after the finish rolling is controlled to be 1180～1250 ℃, soaking time 15～40 minutes; The solution heat treatment heating fuel adopts the Sweet natural gas of cleaning, can effectively prevent the pollution of steel pipe harmful elements such as S, P when high temperature, combustion system adopts the high combustion rate burner burning, the furnace atmosphere good fluidity, the temperature field boundary is even, and adopt computer controlled automatic to comprise processing parameters such as Heating temperature, the furnace roller speed of regulation and control heat tracing time and furnace atmosphere air-fuel ratio, make steel pipe solution heat treatment technological process accurate, stable, reliable.
The stainless steel tube that comes out from finished product solution heat treatment operation promptly gets product after aligning, sawing, trimming and detection.The quality examination result of this product is as follows:
(1), above-mentioned Ф 63.4 * 12mm and Ф 60 * 4mm stainless heat-resistant alloy steel seamless steel tube product be through actual measurement, the external diameter of steel pipe, wall thickness and surface quality all meet the requirement of ASME SA213/SA213M-08 standard.
(2), the conventional chemical analysis of components of steel pipe table (Shanghai Power Equipment Research Institute's review report) as a result
(3), the room temperature tensile performance test of steel pipe table (Shanghai Power Equipment Research Institute's review report) as a result
The hardness test of steel pipe is table (Shanghai Power Equipment Research Institute's review report) as a result
(4), Erichsen test table (Shanghai Power Equipment Research Institute's review report) as a result under each test temperature of steel pipe (φ 63.4 * 12)
The high temperature, short time tensile strength of steel pipe (φ 63.4 * 12) varies with temperature graphic representation, sees accompanying drawing 1.
(5), the grain fineness number of steel pipe and microstructure test-results table (Shanghai Power Equipment Research Institute's review report)
(6), 700 ℃, 100,000 hours creep rupture strength of extrapolated sample pipe is 71.2Mpa, its 700 ℃ of high-temperature and durable graphic representations (Harbin Boiler Co., Ltd.'s evaluation report) are seen accompanying drawing 2.
(7), Steel Welded Joint tensile test at room temperature table (Shanghai Furnace Factory Co., Ltd's evaluation report) as a result
| Material | Heat treatment state | ??Rp0.2(Mpa) | ?Rm(Mpa) | Fracture position |
| φ 63.4 * 12 steel pipes | As-welded | ??494 ??471 | ?761 ?759 | Outside the weldering matter outside weld matter |
(8), SA-213-TP310HCbN welding joint high-temperature short delay stretching performance table (Shanghai Furnace Factory Co., Ltd's evaluation report)
(9), Steel Welded Joint Impulse Test Result table (Shanghai Furnace Factory Co., Ltd's evaluation report)
The extension performance and the impact property of Steel Welded Joint are good.
(10), welding joint pliability test table (Shanghai Furnace Factory Co., Ltd's evaluation report) as a result
| Material | Face is bent (D=3T, a=180 °) | The back of the body curved (D=3T, a=180 °) |
| φ 63.4 * 12 steel pipes | Qualified, qualified | Qualified, qualified |
The unit elongation of steel pipe is better, and process industrial art performance is good, can satisfy the distortion bend pipe of different demands.
Show that by last detected result this stainless heat-resistant alloy steel seamless steel tube product can satisfy the ultra supercritical station boiler with technical requirementss such as the mechanical behavior under high temperature of pipe, creep rupture strength and good welding and process industrial art performances.
Claims (9)
1, a kind of stainless heat-resistant alloy steel seamless steel tube, it is characterized in that its Chemical Composition is by weight percentage: C 0.04～0.10, Si≤0.75, Mn≤2.00, P≤0.03, S≤0.03, Ni 17.00～23.00, and Cr 24.00～26.00, and Nb+Ta 0.20～0.60, N 0.15～0.35, and surplus is Fe and inevitably micro-.
2, by the described stainless heat-resistant alloy steel seamless steel tube of claim 1, it is characterized in that the technical indicator of its normal temperature mechanical property is: yield strength 〉=295MPa, tensile strength 〉=655MPa, unit elongation A% 〉=30, hardness≤256HB/100HRB; Metallographic structure is an austenite; Grain fineness number is 4～7 grades.
3, a kind of production method of stainless heat-resistant alloy steel seamless steel tube according to claim 1 is characterized in that comprising following processing step:
The heating of pipe bar → examination → aligning → crop end → peeling → segmentation → boring → end face processing → reconditioning → cleaning → preheating → once → lubricated → reaming → second-heating → lubricate → be squeezed into female pipe → hardening → aligning → sawing → pickling → inspection → cold rolling → deoil → solution heat treatment → aligning-→ sawing → pickling → nondestructive testing → finishing reconditioning → finished product packing puts in storage.
4,, it is characterized in that described bar is that the Chemical Composition that adopts " electric furnace+external refining " production technique to reach described stainless heat-resistant alloy steel seamless steel tube requires by the production method of the described stainless heat-resistant alloy steel seamless steel tube of claim 3.
5, by the production method of the described stainless heat-resistant alloy steel seamless steel tube of claim 3, it is characterized in that described preheating temperature is 800～850 ℃.
6,, it is characterized in that the described once temperature of heating is that the reaming temperature is controlled to be 1180～1200 ℃ by the production method of the described stainless heat-resistant alloy steel seamless steel tube of claim 3.
7, by the production method of the described stainless heat-resistant alloy steel seamless steel tube of claim 3, the temperature that the temperature that it is characterized in that described second-heating promptly is squeezed into female pipe is controlled to be 1200～1220 ℃.
8, by the production method of the described stainless heat-resistant alloy steel seamless steel tube of claim 3, it is characterized in that described cold rolling be to adopt one roughing to add two passage cold-rolling process of one finish rolling.
9, by the production method of claim 3 or 8 described stainless heat-resistant alloy steel seamless steel tubes, it is characterized in that the temperature of described solution heat treatment: the semifinished tube of roughing system is controlled to be 1100～1150 ℃, and the production tube after the finish rolling is controlled to be 1180～1250 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910101878A CN101665891A (en) | 2009-08-29 | 2009-08-29 | Stainless heat-resistant alloy steel seamless steel tube and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910101878A CN101665891A (en) | 2009-08-29 | 2009-08-29 | Stainless heat-resistant alloy steel seamless steel tube and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101665891A true CN101665891A (en) | 2010-03-10 |
Family
ID=41802665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910101878A Pending CN101665891A (en) | 2009-08-29 | 2009-08-29 | Stainless heat-resistant alloy steel seamless steel tube and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101665891A (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434725A (en) * | 2011-10-10 | 2012-05-02 | 刘群联 | Method for manufacturing stainless steel seamless steel pipe with large caliber |
| CN102513388A (en) * | 2011-11-30 | 2012-06-27 | 常州盛德无缝钢管有限公司 | Manufacture method for inner-threaded steel pipe applied to supercritical or ultra supercritical fossil power unit |
| CN102925653A (en) * | 2012-10-24 | 2013-02-13 | 安徽应升钢管制造有限公司 | Technology for processing high-precision stainless steel seamless pipe through solution heat treatment |
| CN102974635A (en) * | 2012-12-12 | 2013-03-20 | 山西太钢不锈钢股份有限公司 | Extrusion method for molybdenum alloy seamless pipe |
| CN103056180A (en) * | 2013-02-04 | 2013-04-24 | 山西太钢不锈钢股份有限公司 | Hot extrusion process of thin-walled 23000mm ultralong pipe |
| CN103225011A (en) * | 2013-04-24 | 2013-07-31 | 浙江久立特材科技股份有限公司 | Solid melting annealing furnace hearth roll and manufacture method thereof |
| CN103243213A (en) * | 2013-04-26 | 2013-08-14 | 山西太钢不锈钢股份有限公司 | Method for preventing super duplex stainless steel seamless tube from hole reaming cracking before extrusion |
| CN103447760A (en) * | 2013-08-12 | 2013-12-18 | 新兴铸管股份有限公司 | Manufacturing method of N08028 seamless alloy steel pipe |
| CN103599957A (en) * | 2013-11-18 | 2014-02-26 | 山西太钢不锈钢股份有限公司 | Extruding molding method of austenitic stainless steel seamless pipe for hydrogenation cracking furnace |
| CN103695799A (en) * | 2013-12-26 | 2014-04-02 | 浙江德传管业有限公司 | Production process of heat-resistance stainless steel seamless steel pipes with ultra-fine grains |
| CN103692167A (en) * | 2013-12-20 | 2014-04-02 | 攀钢集团江油长城特殊钢有限公司 | Method for fabricating UNSN08028 oil sleeve |
| CN103981421A (en) * | 2014-05-13 | 2014-08-13 | 南安市国高建材科技有限公司 | Wear-resistant, heatproof, and anticorrosive pipe |
| CN104307921A (en) * | 2014-10-20 | 2015-01-28 | 张家港市人和高精管有限公司 | Seamless steel tube production process |
| CN104328324A (en) * | 2014-11-12 | 2015-02-04 | 邯郸新兴特种管材有限公司 | Production technique of iron-nickel-base alloy tube |
| CN104357760A (en) * | 2014-12-06 | 2015-02-18 | 常熟市东鑫钢管有限公司 | Heat-resistant stainless steel seamless steel pipe for high-pressure boiler |
| WO2015135343A1 (en) * | 2014-03-14 | 2015-09-17 | 常熟市兰达兰基钢管附件有限公司 | Multifunctional boiler pipe |
| CN112281084A (en) * | 2020-11-06 | 2021-01-29 | 河北恒通管件集团有限公司 | Processing technology of hydrogen-contacting high-pressure large-caliber thick-wall stainless steel pipe fitting |
| CN112760569A (en) * | 2020-12-28 | 2021-05-07 | 湖州盛特隆金属制品有限公司 | Heat-resistant pipe for nitrogen-containing and niobium-containing boiler and preparation method thereof |
| CN112846659A (en) * | 2020-12-31 | 2021-05-28 | 上海久砾不锈钢管有限公司 | Seamless method for stainless steel welded pipe and application thereof |
| CN114657322A (en) * | 2022-04-20 | 2022-06-24 | 德新钢管（中国）有限公司 | Large-caliber duplex stainless steel seamless steel pipe and preparation method and application thereof |
| CN116408363A (en) * | 2023-04-06 | 2023-07-11 | 浙江久立特材科技股份有限公司 | Preparation method of nickel-molybdenum corrosion-resistant alloy seamless pipe and prepared seamless pipe |
-
2009
- 2009-08-29 CN CN200910101878A patent/CN101665891A/en active Pending
Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434725A (en) * | 2011-10-10 | 2012-05-02 | 刘群联 | Method for manufacturing stainless steel seamless steel pipe with large caliber |
| CN102434725B (en) * | 2011-10-10 | 2016-05-25 | 江西金盈新材料科技股份有限公司 | A kind of manufacture method of large-caliber stainless steel seamless pipe |
| CN102513388A (en) * | 2011-11-30 | 2012-06-27 | 常州盛德无缝钢管有限公司 | Manufacture method for inner-threaded steel pipe applied to supercritical or ultra supercritical fossil power unit |
| CN102925653A (en) * | 2012-10-24 | 2013-02-13 | 安徽应升钢管制造有限公司 | Technology for processing high-precision stainless steel seamless pipe through solution heat treatment |
| CN102974635A (en) * | 2012-12-12 | 2013-03-20 | 山西太钢不锈钢股份有限公司 | Extrusion method for molybdenum alloy seamless pipe |
| CN102974635B (en) * | 2012-12-12 | 2015-08-05 | 山西太钢不锈钢股份有限公司 | The pressing method of molybdenum alloy seamless pipe |
| CN103056180A (en) * | 2013-02-04 | 2013-04-24 | 山西太钢不锈钢股份有限公司 | Hot extrusion process of thin-walled 23000mm ultralong pipe |
| CN103225011B (en) * | 2013-04-24 | 2015-04-29 | 浙江久立特材科技股份有限公司 | Solid melting annealing furnace hearth roll and manufacture method thereof |
| CN103225011A (en) * | 2013-04-24 | 2013-07-31 | 浙江久立特材科技股份有限公司 | Solid melting annealing furnace hearth roll and manufacture method thereof |
| CN103243213A (en) * | 2013-04-26 | 2013-08-14 | 山西太钢不锈钢股份有限公司 | Method for preventing super duplex stainless steel seamless tube from hole reaming cracking before extrusion |
| CN103447760A (en) * | 2013-08-12 | 2013-12-18 | 新兴铸管股份有限公司 | Manufacturing method of N08028 seamless alloy steel pipe |
| CN103447760B (en) * | 2013-08-12 | 2015-12-02 | 新兴铸管股份有限公司 | A kind of manufacture method of N08028 alloy seamless steel pipe |
| CN103599957A (en) * | 2013-11-18 | 2014-02-26 | 山西太钢不锈钢股份有限公司 | Extruding molding method of austenitic stainless steel seamless pipe for hydrogenation cracking furnace |
| CN103599957B (en) * | 2013-11-18 | 2016-03-30 | 山西太钢不锈钢股份有限公司 | A kind of extrusion process of hydrocracking stove austenitic stainless steel seamless pipe |
| CN103692167A (en) * | 2013-12-20 | 2014-04-02 | 攀钢集团江油长城特殊钢有限公司 | Method for fabricating UNSN08028 oil sleeve |
| CN103692167B (en) * | 2013-12-20 | 2016-04-20 | 攀钢集团江油长城特殊钢有限公司 | Manufacture the method for UNSN08028 tubing and casing |
| CN103695799A (en) * | 2013-12-26 | 2014-04-02 | 浙江德传管业有限公司 | Production process of heat-resistance stainless steel seamless steel pipes with ultra-fine grains |
| CN103695799B (en) * | 2013-12-26 | 2016-08-31 | 浙江德传管业有限公司 | A kind of production technology of ultra-fine grain heat-resistance stainless steel seamless steel pipe |
| WO2015135343A1 (en) * | 2014-03-14 | 2015-09-17 | 常熟市兰达兰基钢管附件有限公司 | Multifunctional boiler pipe |
| CN103981421A (en) * | 2014-05-13 | 2014-08-13 | 南安市国高建材科技有限公司 | Wear-resistant, heatproof, and anticorrosive pipe |
| CN104307921A (en) * | 2014-10-20 | 2015-01-28 | 张家港市人和高精管有限公司 | Seamless steel tube production process |
| CN104328324B (en) * | 2014-11-12 | 2016-11-30 | 邯郸新兴特种管材有限公司 | A kind of production technology of iron nickel base alloy pipe |
| CN104328324A (en) * | 2014-11-12 | 2015-02-04 | 邯郸新兴特种管材有限公司 | Production technique of iron-nickel-base alloy tube |
| CN104357760A (en) * | 2014-12-06 | 2015-02-18 | 常熟市东鑫钢管有限公司 | Heat-resistant stainless steel seamless steel pipe for high-pressure boiler |
| CN112281084A (en) * | 2020-11-06 | 2021-01-29 | 河北恒通管件集团有限公司 | Processing technology of hydrogen-contacting high-pressure large-caliber thick-wall stainless steel pipe fitting |
| CN112281084B (en) * | 2020-11-06 | 2022-02-08 | 河北恒通管件集团有限公司 | Processing technology of hydrogen-contacting high-pressure large-caliber thick-wall stainless steel pipe fitting |
| CN112760569A (en) * | 2020-12-28 | 2021-05-07 | 湖州盛特隆金属制品有限公司 | Heat-resistant pipe for nitrogen-containing and niobium-containing boiler and preparation method thereof |
| CN112846659A (en) * | 2020-12-31 | 2021-05-28 | 上海久砾不锈钢管有限公司 | Seamless method for stainless steel welded pipe and application thereof |
| CN114657322A (en) * | 2022-04-20 | 2022-06-24 | 德新钢管（中国）有限公司 | Large-caliber duplex stainless steel seamless steel pipe and preparation method and application thereof |
| CN116408363A (en) * | 2023-04-06 | 2023-07-11 | 浙江久立特材科技股份有限公司 | Preparation method of nickel-molybdenum corrosion-resistant alloy seamless pipe and prepared seamless pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101665891A (en) | Stainless heat-resistant alloy steel seamless steel tube and preparation method thereof | |
| CN101633999B (en) | Austenitic stainless steel, steel tube thereof and manufacturing method thereof | |
| CN101705437B (en) | Heat-resistant stainless steel with high-lasting strength and manufacturing method thereof | |
| JP5029788B1 (en) | Austenitic stainless steel | |
| CN104073739A (en) | Heatproof stainless steel seamless steel pipe and manufacture method of stainless steel and seamless steel pipe | |
| CN104907470B (en) | 13Cr9Mo2Co1NiVNbNB steel forged piece manufacturing method | |
| US20230167520A1 (en) | S32750 Austenitic Ferrite Super Duplex Stainless Steel Seamless Pipe for Deep Sea Manifold and Method for Preparing Same | |
| CN104894485A (en) | Production method of nuclear power plant used high-temperature-resisting brittleness-resisting seamless steel tube with outer diameter of more than 508mm | |
| CN101684539B (en) | Thick-gauge high-toughness X70 needle-shaped ferrite pipeline steel and manufacturing method thereof | |
| CN109706344B (en) | High-strength and high-toughness titanium alloy pipe for oil and gas development and preparation method thereof | |
| CN103276297A (en) | Self-connecting type and high-strength seamless steel tube for rope coring drill rod, as well as manufacturing method thereof | |
| CN103131897B (en) | 110ksi-level titanium alloy oil well pipe and production method thereof | |
| CN104451394B (en) | Anti-CO2 corrosion oil well pipe below 150 ksi produced by CPE unit and production method thereof | |
| CN107747068A (en) | A kind of heat-resistance stainless steel seamless pipe and preparation method thereof | |
| CN107639129A (en) | The processing technology of corrosion-resistant stainless steel seamless steel pipe | |
| CN104451381A (en) | Large-caliber Gr3 seamless steel tube applied at low temperature and production method thereof | |
| CN104831179A (en) | High-temperature resistant seamless austenitic stainless steel pipe and preparation method thereof | |
| CN106048421B (en) | A kind of 110ksi grades of stainless steel oil pipe and its manufacture method | |
| CN103233180A (en) | High-strength dual-phase stainless steel tube and preparation method thereof | |
| CN103981422B (en) | 825 alloy pipe big distortion techniques | |
| CN113802041A (en) | Manufacturing method of iron-nickel-based alloy seamless pipe applicable to advanced ultra-supercritical unit | |
| CN101117691A (en) | Technique for processing heavy caliber pipes | |
| CN105013823A (en) | Processing technology of production method of seamless steel tubes for high-temperature and high-pressure pipes | |
| CN104388825B (en) | The anti-CO of below 150ksi grade of steel that CPE unit produces2the preparation technology of corrosion oil well pipe | |
| CN102321853A (en) | Flyer and very low temperature system thereof are with stainless steel tube and preparation 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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100310 |